OMB APPROVAL
                                                 OMB Number:       3235-0570
                                                 Expires:  September 30, 2007
                                                 Estimated average burden
                                                 hours per response.....19.4



                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   FORM N-CSR

                   CERTIFIED SHAREHOLDER REPORT OF REGISTERED
                        MANAGEMENT INVESTMENT COMPANIES



		Investment Company Act file number 811-21321	

                   	Pioneer Municipal High Income Trust

               (Exact name of registrant as specified in charter)


                       60 State Street, Boston, MA 02109
              (Address of principal executive offices) (ZIP code)


            Dorothy E. Bourassa, Pioneer Investment Management, Inc.,
                       60 State Street, Boston, MA 02109
                    (Name and address of agent for service)


Registrant's telephone number, including area code:  (617) 742-7825


Date of fiscal year end:  April 30

Date of reporting period:  May 1, 2004 through October 31, 2005



Form N-CSR is to be used by management investment companies to file reports with
the Commission not later than 10 days after the transmission to stockholders of
any report that is required to be transmitted to stockholders under Rule 30e-1
under the Investment Company Act of 1940 (17 CFR 270.30e-1).  The Commission may
use the information provided on Form N-CSR in its regulatory, disclosure review,
inspection, and policymaking roles.

A registrant is required to disclose the information specified by Form N-CSR,
and the Commission will make this information public. A registrant is not
required to respond to the collection of information contained in Form N-CSR
unless the Form displays a currently valid Office of Management and Budget
("OMB") control number. Please direct comments concerning the accuracy of the
information collection burden estimate and any suggestions for reducing the
burden to Secretary, Securities and Exchange Commission, 450 Fifth Street, NW,
Washington, DC 20549-0609.  The OMB has reviewed this collection of information
under the clearance requirements of 44 U.S.C. ss. 3507. 


ITEM 1. REPORTS TO SHAREOWNERS.


                                     PIONEER
                            -----------------------
                                   MUNICIPAL
                                      HIGH
                                     INCOME
                                     TRUST

                                   Semiannual
                                     Report

                                    10/31/05


                             [LOGO] PIONEER
                                    Investments(R)


 Table of Contents
--------------------------------------------------------------------------------


                                          
Letter to Shareowners                         1
Portfolio Summary                             2
Performance Update                            3
Portfolio Management Discussion               5
Schedule of Investments                       8
Financial Statements                         17
Notes to Financial Statements                21
Results of Shareowner Meeting                29
Trustees, Officers and Service Providers     30




Pioneer Municipal High Income Trust
--------------------------------------------------------------------------------
LETTER TO SHAREOWNERS 10/31/05
--------------------------------------------------------------------------------

 Dear Shareowner,
--------------------------------------------------------------------------------
Questions about the economic outlook moved from theoretical to real when
Hurricanes Katrina and Rita wreaked devastation on people and property across
much of the Gulf Coast. Before the storms struck, the economy had been motoring
forward, with strong profit growth and good jobs numbers being reported across
a range of sectors. Despite 12 straight hikes by the Federal Reserve Board,
interest rates were at tolerable levels, and businesses and households were
managing to live with rising energy costs. The Fed raised rates again on
November 1, 2005, suggesting continued concern that inflationary fires are
merely banked, not extinguished. The stimulative effect of massive recovery
spending may have been a factor in the Fed's decision. Damage to many Gulf area
facilities may also keep oil and gasoline supplies tight and restrain GDP
growth for a time. By late in the third quarter, energy prices had backed off
peak levels, but remained high enough to prompt worries over their impact on
consumers and the economy in general.

Consumers are key to the economy's direction. The national savings rate stands
near zero, leaving households with little financial slack to continue absorbing
punishing prices at the pump and in their heating and utility bills; confidence
understandably sagged after the storms. However, U.S. consumers are notably
resilient. If conditions in the job market rebound from storm-induced
disruptions, their behavior seems unlikely to change very much.

Barring surprises, the hurricanes have not undercut our favorable expectations
for the rest of the year. We believe carefully selected, high-quality stocks
and bonds still show potential for solid results even in a slower-growth
environment. With that in mind, our global investment experts are well
positioned to seek attractive opportunities around the world.

Another Fund Group Joins the Pioneer Family

Pioneer Investment Management recently completed the acquisition of AmSouth
Bancorporation's mutual fund management business. This transaction, our fifth
in two years, adds seven new funds to our lineup and expands assets under
management by over $5 billion. Transactions such as these increase our ability
to offer competitively priced products to our shareowners through the services
of their financial advisors.

Respectfully,
/s/ Osbert M. Hood
 
Osbert M. Hood, President
Pioneer Investment Management, Inc.

Any information in this shareowner report regarding market or economic trends
or the factors influencing the Trust's historical or future performance are
statements of the opinion of Trust management as of the date of this report.
These statements should not be relied upon for any other purposes. Past
performance is no guarantee of future results, and there is no guarantee that
market forecasts discussed will be realized.
Please consider the fund's investment objectives, risks, charges and expenses.
Contact your advisor or Pioneer investments for a prospectus containing this
information. Please read the information carefully.

                                                                               1


Pioneer Municipal High Income Trust
--------------------------------------------------------------------------------
PORTFOLIO SUMMARY 10/31/05
--------------------------------------------------------------------------------

Portfolio Diversification
--------------------------------------------------------------------------------
(As a percentage of total investment portfolio)

[THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL]




                                  
Utilities Revenue                   0.2%
Housing Revenue                     1.1% 
Gaming Revenue                      1.3%
Transportation Revenue              1.5%
General Obligation                  2.1%
Facilities Revenue                  3.9%
Development Revenue                 5.5%
Power Revenue                       6.3%
Education Revenue                   6.9%
Pollution Control Revenue           7.1%
Tobacco Revenue                    11.1%
Insured                            11.9% 
Airport Revenue                    16.3%
Health Revenue                     24.8%  


Portfolio Maturity
--------------------------------------------------------------------------------
(Effective life as a percentage of long-term holdings)

[THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL]




           
10+ years   14.9%
8-10 years   8.9%
6-8 years   18.2%
3-6 years   44.8%
1-3 years    5.4%
0-1 years    7.8%


Quality Distribution
--------------------------------------------------------------------------------
(As a percentage of holdings; based on S&P ratings.)

[THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL]




          
AAA        17.6%
AA          4.9%
A           2.7%
BBB        26.0%
BB & Lower 48.8%


                      
The portfolio is actively managed and current holdings may be different.

2


Pioneer Municipal High Income Trust
-----------------------------------------------------------------------------
PERFORMANCE UPDATE 10/31/05
-----------------------------------------------------------------------------

Share Prices and Distributions
-----------------------------------------------------------------------------



Market Value
per Common Share    10/31/05   4/30/05
                        
                   $14.38     $14.33




Net Asset Value
per Common Share    10/31/05   4/30/05
                        
                   $14.82     $15.62




Distributions
per Common Share         Income      Short-Term      Long-Term
(5/1/05 - 10/31/05)    Dividends   Capital Gains   Capital Gains
                                         
                      $0.48             $ -         $ -


10 Largest Holdings
--------------------------------------------------------------------------------
(As a percentage of long-term holdings)



                                                                  
    1.  Greenville County School District, 5.5%, 12/1/28                 3.86%
    2.  Allegheny County Hospital Development Authority Revenue,
        9.25%, 11/15/30                                                  3.53
    3.  Tobacco Settlement Financing Corp., 6.75%, 6/1/39                2.75
    4.  New Jersey Economic Development Authority Revenue,
        6.25%, 9/15/29                                                   2.60
    5.  Massachusetts State Development Finance Agency,
        9.449%, 10/1/39                                                  2.53
    6.  Metropolitan Pier & Exposition Authority Dedicated State Tax
        Revenue, 0.0%, 6/15/22                                           2.44
    7.  Oklahoma Development Finance Authority Revenue,
        5.625%, 8/15/29                                                  2.09
    8.  Golden State Tobacco Securitization Corp., 7.875%, 6/1/42        2.06
    9.  Minneapolis/St. Paul Metropolitan Airports, 7.0%, 4/1/25         2.05
   10.  Johnson City Health & Educational Facilities Board Hospital
        Revenue, 7.5%, 7/1/33                                            1.96


This list excludes temporary cash and derivative instruments. The portfolio is
actively managed, and current holdings may be different.

                                                                               3


Pioneer Municipal High Income Trust
-----------------------------------------------------------------------------
PERFORMANCE UPDATE 10/31/05
-----------------------------------------------------------------------------

Investment Returns
-----------------------------------------------------------------------------
    
   The mountain chart on the right shows the change in value of a $10,000
   investment made in common shares of Pioneer Municipal High Income Trust,
   compared to that of the Lehman Brothers Municipal Bond Index and Lehman
   Brothers Non-Investment Grade Municipal Bond Index.

[THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL]

Value of a $10,000 Investment


                                    


7/03      10000            10000           10000
10/03      10097            10319           10535
           10486            10941           11574
10/05      11261            11219           12663






           Cumulative Annual Total Returns
              (As of October 31, 2005)
                                  Net Asset    Market
Period                           Value (NAV)   Price
                                        
 Life-of-Trust
 (7/21/03)                      21.49%        12.61%
 1 Year                          6.66         7.21
 

 
----------------------------------

   Call 1-800-225-6292 or visit www.pioneerfunds.com for the most recent
   month-end performance results. Current performance may be lower or higher
   than the performance data quoted.

   Performance data shown represents past performance. Past performance is no
   guarantee of future results. Investment return and market price will
   fluctuate, and your shares may trade below net asset value ("NAV"), due to
   such factors as interest rate changes, and the perceived credit quality of
   borrowers.

   Total investment return does not reflect broker sales charges or
   commissions. All performance is for common shares of the Trust.

   Closed-end funds, unlike open-end funds, are not continuously offered.
   There is a one-time public offering and once issued, shares of closed-end
   funds are sold in the open market through a stock exchange and frequently
   trade at prices lower than their NAV. NAV is total assets less total
   liabilities, which includes preferred shares, divided by the number of
   common shares outstanding.

   When NAV is lower than market price, dividends are assumed to be reinvested
   at the greater of NAV or 95% of the market price. When NAV is higher,
   dividends are assumed to be reinvested at market price.

   The performance table and graph do not reflect the deduction of fees and
   taxes that a shareowner would pay on Trust distributions or the redemption
   of Trust shares.

   Index comparison begins July 31, 2003. The Lehman Brothers Municipal Bond
   Index is a broad measure of the municipal bond market. Lehman Brothers
   Non-Investment Grade Municipal Bond Index totals over $26 billion in market
   value and maintains over 1300 securities. Municipal bonds in this index
   have the following requirements: maturities of one year or greater, sub
   investment grade (below Baa or non-rated), fixed coupon rate, dated date
   greater than 12-31-90, deal size over $20 million, maturity size of at
   least $3 trillion. Index returns are calculated monthly, assume
   reinvestment of dividends and, unlike Trust returns, do not reflect any
   fees, expenses or sales charges. You cannot invest directly in an Index.

4


Pioneer Municipal High Income Trust
--------------------------------------------------------------------------------
PORTFOLIO MANAGEMENT DISCUSSION 10/31/05
--------------------------------------------------------------------------------

In an environment of rising interest rates, surging energy prices and
devastation in the Gulf of Mexico caused by hurricane Katrina, shareowners in
Pioneer Municipal High Income Trust continued to earn a relatively high level
of income over the six-month period ended October 31, 2005. In the following
interview, David Eurkus, a member of the management team for Pioneer Municipal
High Income Trust, reviews the factors that affected the Trust's performance
over the six months.

Q: What was the investment environment like during the six-month period ended
   October 31, 2005?

A: Despite rising interest rates and record high oil prices, the economy
   continued to grow at a moderate rate. The Federal Reserve hiked interest
   rates five times during the last six months, each time by a quarter
   point. On October 31, 2005, the federal funds rate, the rate banks charge
   for overnight loans, stood at 4.00%, up from 2.75% on April 30, 2005. In
   the wake of the Fed's actions, yields on investment-grade municipal bonds
   (those rated BBB or better) rose across the maturity spectrum, with
   yields on shorter-term securities moving higher than those on longer-term
   securities. Yields on lower-quality bonds (those rated BB or lower)
   declined slightly.

Q: How did the Trust perform in this environment?

A: For the period, Pioneer Municipal High Income Trust produced a total return
   of -2.03% at net asset value and 3.62% at market price. As of October 31,
   2005, the Trust was selling at a discount of market price to net asset
   value of 2.97%. The Lehman Brothers Municipal Bond Index, which tracks
   the performance only of investment-grade bonds, returned 0.59%. The
   Lehman Brothers Non-Investment Grade Municipal Bond Index returned 2.12%
   for the same period. At the end of the period, the Trust held 105 issues
   in various states and the District of Columbia. On October 31, 2005, the
   Trust's 30-day SEC yield was 6.65%. On October 31, 2005, the average
   credit quality of the Trust was BBB.

   Call 1-800-225-6292 or visit www.pioneerfunds.com for the most recent
   month-end performance results. Current performance may be lower or higher
   than the performance data quoted.

   The performance data quoted represents past performance, which is no
   guarantee of future results. Investment return and principal value will
   fluctuate, and shares, when redeemed, may be worth more or less than their
   original cost.

                                                                               5


Pioneer Municipal High Income Trust
--------------------------------------------------------------------------------
PORTFOLIO MANAGEMENT DISCUSSION 10/31/05                           (continued)
--------------------------------------------------------------------------------

Q: Why did the Trust underperform during the period?

A: Below investment-grade bonds, those rated BB and lower, accounted for about
   49% of net assets. While most of the lower-quality bonds in the Trust
   performed well, some airline bonds, such as Delta and Northwest,
   detracted from results. Both of these companies voluntarily declared
   bankruptcy in the face of rising costs, especially those associated with
   pension benefits and the run-up in the price of jet fuel. While our
   position in airline bonds disappointed over the six-month reporting
   period, such bonds had been strong contributors to performance for more
   than a year.

Q: What contributed to performance?

A: The Trust was fully invested in a variety of economic sectors, and its
   holdings in the health care, education, public power and energy areas
   were positive for performance.

   Tobacco bonds (11.1% of the portfolio holdings) gave performance the
   biggest boost. These bonds are backed by tobacco companies' payments to
   states as part of the Master Settlement Agreement in which states agreed
   to drop their lawsuits against tobacco companies in return for a series of
   payments. Health care bonds, which accounted 24.8% of the portfolio
   holdings, turned in the next best performance.

   Despite rising short-term interest rates, our leveraging strategy was also
   helpful and enabled the Trust to continue to provide a relatively high
   level of income. We leveraged a portion of the Trust more than a year ago
   when interest rates were at historically low levels. Low interest rates
   provided us with an opportunity to borrow funds at low rates and invest
   those funds in high-yield bonds. Over the six-month reporting period, the
   Trust continued to benefit from the income that the high-yield bonds
   generated.

Q: What is your outlook?

A: We believe economic growth will continue at a moderate pace. While some
   sectors, such as energy, appear to be inflationary, we do not expect core
   inflation to rise substantially over the near term. Nevertheless, we
   expect the Federal Reserve to continue its policy of raising rates at a
   measured pace. We plan to keep the Trust well diversified among economic
   sectors and to have a mix of investment-grade and below investment-grade
   bonds in the portfolio.

6


Pioneer Municipal High Income Trust
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

Investments in high yield or lower-rated securities are subject to
greater-than-average risk. When interest rates rise, the prices of fixed income
securities in the Trust will generally fall. Conversely, when interest rates
fall the prices of fixed income securities in the Trust will generally rise.
Investments in the Trust are subject to possible loss due to the financial
failure of underlying securities and their inability to meet their debt
obligations. These risks may increase share price volatility.
Any information in this shareowner report regarding market or economic trends
or the factors influencing the Trust's historical or future performance are
statements of the opinion of Trust management as of the date of this report.
These statements should not be relied upon for any other purposes. Past
performance is no guarantee of future results, and there is no guarantee that
market forecasts discussed will be realized.

                                                                               7


Pioneer Municipal High Income Trust
--------------------------------------------------------------------------------
SCHEDULE OF INVESTMENTS 10/31/05 (unaudited)
--------------------------------------------------------------------------------



                 S&P/Moody's
 Principal       Ratings
 Amount          (unaudited)                                                               Value
                                                                             
                               TAX EXEMPT OBLIGATIONS - 126.6% of Net Assets
                               Alabama - 2.1%
$ 5,000,000      AAA/Aaa       Birmingham Alabama General Obligation,
                               5.0%, 12/1/32                                          $   5,113,500
  1,500,000      BBB/NR        Camden Alabama Industrial Development Board,
                               6.125%, 12/1/24                                            1,652,055
                                                                                      -------------
                                                                                      $   6,765,555
                                                                                      -------------
                               Arizona - 6.5%
  5,000,000      B+/Ba1        Apache County Industrial Development Authority,
                               5.85%, 3/1/28                                          $   5,000,850
  5,000,000      B+/Ba1        Apache County Industrial Development Authority,
                               5.875%, 3/1/33                                             5,000,950
 11,630,000      D/NR          Gila County Industrial Development Authority,
                               5.55%, 1/1/27*                                             6,559,320
  3,000,000      NR/NR         Maricopa County Industrial Development Authority,
                               7.875%, 4/1/27                                             3,117,780
  1,000,000      NR/Baa3       Pima County Industrial Development Authority,
                               7.25%, 7/1/31                                              1,078,550
    500,000      NR/Baa2       Yavapai County Industrial Development Authority,
                               6.0%, 8/1/33                                                 531,425
                                                                                      -------------
                                                                                      $  21,288,875
                                                                                      -------------
                               California - 11.4%
  7,270,000      A/A2          California State General Obligation, 5.25%, 2/1/28     $   7,593,878
  5,150,000      BBB/Baa3      Golden State Tobacco Securitization Corp.,
                               7.8%, 6/1/42                                               6,260,958
  7,000,000      BBB/Baa3      Golden State Tobacco Securitization Corp.,
                               7.875%, 6/1/42                                             8,543,570
  4,000,000      AAA/Aaa       Palm Desert Financing Authority Tax Allocation
                               Revenue, 5.0%, 4/1/30                                      4,097,800
  3,000,000      AAA/Aaa       San Diego Unified School District, 5.0%, 7/1/25            3,185,430
  2,500,000      AAA/Aaa       University of California Revenue, 5.0%, 5/15/25            2,591,900
  5,000,000      B+/NR         Valley Health System Hospital Revenue,
                               6.5%, 5/15/25                                              5,003,250
                                                                                      -------------
                                                                                      $  37,276,786
                                                                                      -------------


8 The accompanying notes are an integral part of these financial statements.


Pioneer Municipal High Income Trust
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------



                 S&P/Moody's
 Principal       Ratings
 Amount          (unaudited)                                                              Value
                                                                           
                               Connecticut - 4.3%
$ 2,000,000      NR/NR         Bridgeport Senior Living Facility Revenue,
                               7.25%, 4/1/35                                        $   1,958,600
  2,205,000      BB+/Ba1       Connecticut State Health & Educational Facilities
                               Authority Revenue, 5.375%, 7/1/17                        2,177,592
  4,800,000      BB+/Ba1       Connecticut State Health & Educational Facilities
                               Authority Revenue, 5.5%, 7/1/27                          4,646,208
  5,000,000      BB+/NR        Mohegan Tribe Indians Gaming Authority,
                               6.25%, 1/1/31 (144A)                                     5,346,900
                                                                                    -------------
                                                                                    $  14,129,300
                                                                                    -------------
                               District of Columbia - 3.8%
  5,000,000      BBB/Baa3      District of Columbia Tobacco Settlement Financing
                               Corp., 6.5%, 5/15/33                                 $   5,783,550
  6,000,000      BBB/Baa3      District of Columbia Tobacco Settlement Financing
                               Corp., 6.75%, 5/15/40                                    6,593,820
                                                                                    -------------
                                                                                    $  12,377,370
                                                                                    -------------
                               Florida - 3.1%
  2,000,000      NR/NR         Beacon Lakes Community Development,
                               6.9%, 5/1/35                                         $   2,098,160
  4,140,000      D/C           Hillsborough County Aviation Authority Revenue,
                               6.8%, 1/1/24*                                              910,800
  1,650,000      BBB-/Baa2     Polk County Industrial Development Revenue,
                               5.85%, 12/1/30                                           1,698,362
  5,000,000      NR/Baa2       Tallahassee Health Facilities Revenue,
                               6.375%, 12/1/30                                          5,335,000
                                                                                    -------------
                                                                                    $  10,042,322
                                                                                    -------------
                               Georgia - 0.6%
  1,325,000      NR/NR         Brunswick & Glynn County Development Authority
                               Revenue, 7.25%, 1/1/35                               $   1,385,022
    450,000      D/C           Fulton County Development Authority Revenue,
                               5.3%, 5/1/13*                                               72,000
  3,400,000      D/C           Fulton County Development Authority Revenue,
                               6.85%, 11/1/07*                                            544,000
                                                                                    -------------
                                                                                    $   2,001,022
                                                                                    -------------
                               Idaho - 1.6%
  5,000,000      BBB-/Baa3     Power County Industrial Development Corp.,
                               6.45%, 8/1/32                                        $   5,236,950
                                                                                    -------------


The accompanying notes are an integral part of these financial statements.    9
                                                                  


Pioneer Municipal High Income Trust
--------------------------------------------------------------------------------
SCHEDULE OF INVESTMENTS 10/31/05 (unaudited) (continued)
--------------------------------------------------------------------------------



                      S&P/Moody's
 Principal            Ratings
 Amount               (unaudited)                                                               Value
                                                                                 
                                    Illinois - 3.8%
  $   1,000,000       NR/NR         Centerpoint Intermodal Center, 8.0%,
                                    6/15/23 (144A)                                        $     962,780
      1,500,000       NR/NR         Illinois Health Facilities Authority Revenue,
                                    6.9%, 11/15/33                                            1,606,050
     16,880,000(a)    AAA/Aaa       Metropolitan Pier & Exposition Authority Dedicated
                                    State Tax Revenue, 0.0%, 6/15/22                         10,110,614
                                                                                          -------------
                                                                                          $  12,679,444
                                                                                          -------------
                                    Indiana - 1.7%
      1,000,000       BBB+/Baa1     Indiana State Development Finance Authority
                                    Revenue, 5.6%, 12/1/32                                $   1,032,290
      4,300,000       BBB-/Ba3      Indiana State Development Finance Authority
                                    Revenue, 5.75%, 10/1/11                                   4,453,209
                                                                                          -------------
                                                                                          $   5,485,499
                                                                                          -------------
                                    Massachusetts - 10.2%
      2,335,000       AAA/Aaa       Massachusetts Health & Educational Facilities
                                    Authority Revenue, 5.0%, 7/15/35                      $   2,396,574
      7,050,000       AAA/Aaa       Massachusetts Health & Educational Facilities
                                    Authority Revenue, 5.125%, 7/15/37                        7,306,268
      1,000,000       AA/Aa3        Massachusetts Health & Educational Facilities
                                    Authority Revenue, 5.25%, 10/15/33                        1,041,290
      3,500,000       BBB/Baa3      Massachusetts Health & Educational Facilities
                                    Authority Revenue, 6.25%, 7/1/22                          3,741,605
      5,000,000       BBB-/NR       Massachusetts Health & Educational Facilities
                                    Authority Revenue, 6.75%, 10/1/33                         5,416,500
         75,000       BB/NR         Massachusetts State Development Finance
                                    Agency, 5.25%, 10/1/18                                       70,503
      9,810,000(b)    NR/Aaa        Massachusetts State Development Finance
                                    Agency, RIB, 9.449%, 10/1/39 (144A)                      10,486,596
      3,055,000       AA-/Aa3       Massachusetts State Housing Finance Agency,
                                    5.25%, 12/1/33                                            3,112,220
                                                                                          -------------
                                                                                          $  33,571,556
                                                                                          -------------


10  The accompanying notes are an integral part of these financial statements.


Pioneer Municipal High Income Trust
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------



                   S&P/Moody's
 Principal         Ratings
 Amount            (unaudited)                                                             Value
                                                                            
                                 Michigan - 4.1%
$ 1,500,000        BBB-/NR       John Tolfree Health System Corp., 6.0%, 9/15/23     $   1,512,450
 2,000,000         BB-/Ba3       Michigan State Hospital Finance Authority
                                 Revenue, 5.5%, 8/15/23                                  1,914,540
 4,010,000         BBB-/Ba1      Michigan State Hospital Finance Authority
                                 Revenue, 6.0%, 2/1/24                                   4,011,724
 2,000,000+        NR/NR         Michigan State Hospital Finance Authority
                                 Revenue, 6.4%, 1/1/15                                   2,050,960
 7,690,000         NR/NR         Wayne Charter County Michigan Special Airport
                                 Facilities Revenue, 6.75%, 12/1/15*                     4,094,925
                                                                                     -------------
                                                                                     $  13,584,599
                                                                                     -------------
                                 Minnesota - 3.1%
 1,675,000         BB/NR         Duluth Economic Development Authority Health
                                 Care Facilities Revenue, 7.25%, 6/15/32             $   1,791,446
13,260,000         NR/NR         Minneapolis/St. Paul Metropolitan Airports,
                                 7.0%, 4/1/25*                                           8,486,400
                                                                                     -------------
                                                                                     $  10,277,846
                                                                                     -------------
                                 Mississippi - 0.9%
 3,000,000         BBB-/Ba1      Mississippi Business Finance Corp. Pollution
                                 Control Revenue, 5.9%, 5/1/22                       $   3,055,500
                                                                                     -------------
                                 Missouri - 1.4%
 5,500,000         NR/B3         St. Louis Industrial Development Authority
                                 Revenue, 7.25%, 12/15/35                            $   4,687,210
                                                                                     -------------
                                 Nevada - 1.5%
 1,000,000         BBB-/Baa2     Clark County Industrial Development Revenue,
                                 5.45%, 3/1/38                                       $   1,054,880
 1,850,000         B-/NR         Clark County Industrial Development Revenue,
                                 5.5%, 10/1/30                                           1,814,498
 2,000,000         NR/NR         Nevada State Department of Business & Industry,
                                 7.25%, 1/1/23                                           2,081,960
                                                                                     -------------
                                                                                     $   4,951,338
                                                                                     -------------
                                 New Hampshire - 1.0%
 3,000,000         AAA/Aaa       Manchester School Facilities Revenue,
                                 5.125%, 6/1/28                                      $   3,126,060
                                                                                     -------------


The accompanying notes are an integral part of these financial statements.   11
                                                                  


Pioneer Municipal High Income Trust
--------------------------------------------------------------------------
SCHEDULE OF INVESTMENTS 10/31/05 (unaudited) (continued)
--------------------------------------------------------------------------------



                    S&P/Moody's
 Principal          Ratings
 Amount             (unaudited)                                                            Value
                                                                            
                                  New Jersey - 9.2%
  $  2,000,000      B/Caa2        New Jersey Economic Development Authority
                                  Revenue, 6.25%, 9/15/19                            $   1,698,500
    13,350,000      B/Caa2        New Jersey Economic Development Authority
                                  Revenue, 6.25%, 9/15/29                               10,793,075
     1,000,000      B/Caa2        New Jersey Economic Development Authority
                                  Revenue, 6.4%, 9/15/23                                   842,850
     6,150,000      B/Caa2        New Jersey Economic Development Authority
                                  Revenue, 7.0%, 11/15/30                                5,297,856
    10,000,000      BBB/Baa3      Tobacco Settlement Financing Corp.,
                                  6.75%, 6/1/39                                         11,397,200
                                                                                     -------------
                                                                                     $  30,029,481
                                                                                     -------------
                                  New Mexico - 1.6%
     3,700,000++    NR/NR         New Mexico Hospital Equipment Loan Council,
                                  6.4%, 6/1/16                                       $   3,836,345
     1,350,000      BBB-/NR       Santa Fe Educational Facilities Revenue,
                                  5.75%, 10/1/28                                         1,358,343
                                                                                     -------------
                                                                                     $   5,194,688
                                                                                     -------------
                                  New York - 6.2%
     2,000,000      A/NR          New York City Industrial Development Agency,
                                  5.375%, 6/1/23                                     $   2,063,440
     6,225,000      CCC/Caa2      New York City Industrial Development Agency,
                                  6.9%, 8/1/24                                           4,584,962
     5,000,000      AAA/Aaa       New York City Trust Cultural Resources Revenue,
                                  5.125%, 7/1/31                                         5,172,150
     2,000,000      NR/NR         Suffolk County Industrial Development Agency,
                                  7.25%, 1/1/30                                          1,995,180
     6,000,000      AAA/Aaa       Triborough Bridge & Tunnel Authority Revenue,
                                  5.25%, 11/15/30                                        6,354,540
                                                                                     -------------
                                                                                     $  20,170,272
                                                                                     -------------
                                  North Carolina - 1.2%
     4,600,000      NR/NR         Charlotte North Carolina Special Facilities
                                  Revenue, 7.75%, 2/1/28                             $   3,945,190
                                                                                     -------------


12  The accompanying notes are an integral part of these financial statements.


Pioneer Municipal High Income Trust
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------



                    S&P/Moody's
 Principal          Ratings
 Amount             (unaudited)                                                                 Value
                                                                                 
                                  Oklahoma - 6.4%
  $   3,000,000+    AAA/Aaa       Oklahoma Development Finance Authority
                                  Revenue, 5.625%, 8/15/19                                $   3,254,970
      8,000,000+    AAA/Aaa       Oklahoma Development Finance Authority
                                  Revenue, 5.625%, 8/15/29                                    8,679,920
      4,100,000     B-/Caa2       Tulsa Municipal Airport Revenue, 5.65%, 12/1/35             3,862,733
      1,225,000     B-/Caa2       Tulsa Municipal Airport Revenue, 6.25%, 6/1/20              1,047,449
      4,350,000     B-/Caa2       Tulsa Municipal Airport Revenue, 7.35%, 12/1/11             4,265,219
                                                                                          -------------
                                                                                          $  21,110,291
                                                                                          -------------
                                  Oregon - 4.4%
      1,000,000     NR/NR         Klamath Falls Electric Revenue, 5.75%, 1/1/13           $     893,640
      7,000,000     NR/NR         Klamath Falls Electric Revenue, 6.0%, 1/1/25                5,953,080
      7,500,000     NR/NR         Western Generation Agency Cogeneration Project
                                  Revenue, 7.125%, 1/1/21                                     7,613,250
                                                                                          -------------
                                                                                          $  14,459,970
                                                                                          -------------
                                  Pennsylvania - 6.0%
      1,550,000     NR/Baa1       Allegheny County Hospital Development Authority
                                  Revenue, 5.125%, 5/1/25                                 $   1,456,318
     12,300,000     B/B1          Allegheny County Hospital Development Authority
                                  Revenue, 9.25%, 11/15/30                                   14,629,989
      1,000,000     BB-/NR        Columbia County Hospital Authority Health Care
                                  Revenue, 5.9%, 6/1/29                                         898,800
      1,000,000     BBB/Ba2       Hazleton Health Services Authority Hospital
                                  Revenue, 5.625%, 7/1/17                                       941,570
      1,280,000     NR/B2         Langhorne Manor Borough Higher Education &
                                  Health Authority Revenue, 7.35%, 7/1/22                     1,280,013
        500,000     BBB+/NR       Pennsylvania Higher Educational Facilities Authority
                                  Revenue, 5.4%, 7/15/36                                        517,305
                                                                                          -------------
                                                                                          $  19,723,995
                                                                                          -------------
                                  Rhode Island - 1.3%
      4,000,000     NR/NR         Central Falls Detention Facilities Revenue,
                                  7.25%, 7/15/35                                          $   4,147,200
                                                                                          -------------
                                  South Carolina - 8.3%
      4,250,000     BBB/Baa2      Georgetown County Environmental Improvement
                                  Revenue, 5.95%, 3/15/14                                 $   4,613,927
     15,000,000     AA-/Aa3       Greenville County School District, 5.5%, 12/1/28           16,027,950
      5,850,000     BBB+/Baa1     South Carolina Jobs Economic Development
                                  Authority Revenue, 6.375%, 8/1/34                           6,463,431
                                                                                          -------------
                                                                                          $  27,105,308
                                                                                          -------------


The accompanying notes are an integral part of these financial statements.   13
                                                                  


Pioneer Municipal High Income Trust
--------------------------------------------------------------------------------
SCHEDULE OF INVESTMENTS 10/31/05 (unaudited) (continued)
--------------------------------------------------------------------------------



                 S&P/Moody's
 Principal       Ratings
 Amount          (unaudited)                                                               Value
                                                                            
                               Tennessee - 3.9%
$ 7,000,000      BBB+/Baa2     Johnson City Health & Educational Facilities Board
                               Hospital Revenue, 7.5%, 7/1/33                        $   8,154,020
  4,480,000      NR/Baa3       Knox County Health Educational & Housing
                               Facilities Board Hospital Revenue,
                               6.375%, 4/15/22                                           4,711,392
                                                                                     -------------
                                                                                     $  12,865,412
                                                                                     -------------
                               Texas - 7.5%
  7,500,000      CCC/Caa2      Alliance Airport Authority Special Facilities
                               Revenue, 7.5%, 12/1/29                                $   5,649,075
  1,345,000      NR/Ba1        Bexar County Housing Finance Corp.,
                               8.0%, 12/1/36                                             1,375,289
  1,000,000      CCC/Caa2      Dallas-Fort Worth International Airport Revenue,
                               6.0%, 11/1/14                                               758,860
  5,000,000      CCC/Caa2      Dallas-Fort Worth International Airport Revenue,
                               6.15%, 5/1/29                                             4,629,600
 20,800,000      D/C           Dallas-Fort Worth International Airport Revenue,
                               7.125%, 11/1/26*                                          3,432,000
  4,000,000      NR/NR         Decatur Hospital Authority Revenue, 7.0%, 9/1/25          4,299,120
  1,000,000      BB/NR         Georgetown Health Facilities Development Corp.,
                               6.25%, 8/15/29                                            1,035,150
  3,750,000      B-/Caa2       Houston Airport System Special Facilities Revenue,
                               5.7%, 7/15/29                                             2,745,637
    500,000      BBB-/Baa2     Sabine River Authority Pollution Control Revenue,
                               6.15%, 8/1/22                                               544,710
                                                                                     -------------
                                                                                     $  24,469,441
                                                                                     -------------
                               Vermont - 0.5%
  1,500,000      A-/A3         Vermont Educational & Health Buildings Financing
                               Agency Revenue, 6.0%, 10/1/28                         $   1,662,300
                                                                                     -------------
                               Virginia - 1.6%
  1,000,000      BBB/Baa3      Peninsula Ports Authority, 6.0%, 4/1/33               $   1,068,110
  4,000,000      BB-/Ba3       Pocahontas Parkway Association of Virginia Toll
                               Road Revenue, 5.5%, 8/15/28                               4,119,080
                                                                                     -------------
                                                                                     $   5,187,190
                                                                                     -------------


14 The accompanying notes are an integral part of these financial statements.


Pioneer Municipal High Income Trust
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------



                 S&P/Moody's
 Principal       Ratings
 Amount          (unaudited)                                                             Value
                                                                           
                               Washington - 5.9%
$ 4,710,000      AAA/Aaa       Spokane Public Facilities District Hotel/Motel
                               Tax & Sales, 5.75%, 12/1/27                          $   5,243,360
  7,025,000      BBB/Baa3      Tobacco Settlement Authority Washington,
                               6.625%, 6/1/32                                           7,663,713
 14,315,000      AAA/Aaa       Washington State General Obligation,
                               0.0%, 6/1/22                                             6,404,960
                                                                                    -------------
                                                                                    $  19,312,033
                                                                                    -------------
                               Wyoming - 1.5%
  5,000,000      BBB-/Baa3     Sweetwater County Solid Waste Disposal Revenue,
                               6.9%, 9/1/24                                         $   5,046,000
                                                                                    -------------
                               TOTAL TAX-EXEMPT OBLIGATIONS
                               (Cost $393,222,981)                                  $ 414,966,003
                                                                                    -------------
   Shares
                               TAX-EXEMPT MONEY MARKET MUTUAL
                               FUND - 0.0% of Net Assets
     65,887                    BlackRock Provident Institutional Municipal Fund     $      65,887
                                                                                    -------------
                               TOTAL TAX-EXEMPT MONEY MARKET
                               MUTUAL FUND
                               (Cost $65,887)                                       $      65,887
                                                                                    -------------
                               TOTAL INVESTMENTS IN SECURITIES - 126.6%
                               (Cost $393,288,868) (c) (d)                          $ 415,031,890
                                                                                    -------------
                               OTHER ASSETS AND LIABILITIES - 4.2%                  $  13,759,754
                                                                                    -------------
                               PREFERRED SHARES AT
                               REDEMPTION VALUE - (30.8)%                           $(101,000,000)
                                                                                    -------------
                               NET ASSETS APPLICABLE TO COMMON
                               SHAREOWNERS - 100.0%                                 $ 327,791,644
                                                                                    ==============


The accompanying notes are an integral part of these financial statements.   15
                                                                  


Pioneer Municipal High Income Trust
--------------------------------------------------------------------------------
SCHEDULE OF INVESTMENTS 10/31/05 (unaudited) (continued)
--------------------------------------------------------------------------------

NR     Security not rated by S&P or Moody's.

(144A) Security is exempt from registration under Rule 144A of the Securities
       Act of 1933. Such securities may be resold normally to qualified
       institutional buyers in a transaction exempt from registration. At 
       October 31, 2005 the value of these securities amounted to $16,796,276 or
       5.1% of net assets applicable to common shareowners.

*      Security is in default and is non-income producing.

+      Prerefunded bonds have been collateralized by U.S. Treasury securities
       which are held in escrow to pay interest and principal on the tax exempt
       issue and to retire the bonds in full at the earliest refunding date.

++     Prerefunded bonds have been collateralized by cash sufficient to pay
       interest and principal on the tax exempt issue and to retire the bonds in
       full at the earliest refunding date.

(a)    Debt obligation initially issued at one coupon which converts to a higher
       coupon at a specific date. The rate shown is the rate at period end.

(b)    The interest rate is subject to change periodically and inversely based
       upon revailing market rates. The interest rate shown was the rate at
       October 31, 2005.

(c)    The concentration of investments by type of obligation/market sector is
       as follows:


                               
       Insured                     11.9%
       General Obligation           2.1
       Revenue Bonds:
        Health Revenue             24.8
        Airport Revenue            16.3
        Tobacco Revenue            11.1
        Pollution Control Revenue   7.1
        Education Revenue           6.9
        Power Revenue               6.3
        Development Revenue         5.5
        Facilities Revenue          3.9
        Transportation Revenue      1.5
        Gaming Revenue              1.3
        Housing Revenue             1.1
        Utilities Revenue           0.2
                                  -----
                                  100.0%
                                  ======


(d)    At October 31, 2005, the net unrealized gain on investments based on cost
       for federal income tax purposes of $392,037,990 was as follows:


                                                                                     
       Aggregate gross unrealized gain for all investments in which there is an excess
       of value over tax cost                                                             $38,788,146
       Aggregate gross unrealized loss for all investments in which there is an excess
       of tax cost over value                                                             (15,794,246)
                                                                                          ------------
       Net unrealized gain                                                                $22,993,900
                                                                                          ============
       For financial reporting purposes net unrealized gain on investments was
       $21,743,022 and cost of investments aggregated $393,288,868


RIB    Residual Interest Bonds

Purchases and sales of securities (excluding temporary cash investments) for
the period ended October 31, 2005, aggregated $24,938,788 and $25,889,669,
respectively.


16   The accompanying notes are an integral part of these financial statements.


Pioneer Municipal High Income Trust
-------------------------------------------------------------------------------
STATEMENT OF ASSETS AND LIABILITIES 10/31/05
-------------------------------------------------------------------------------


                                                             
ASSETS:
  Investments in securities, at value (cost $393,288,868)        $415,031,890
  Receivables -
    Investment securities sold                                      6,640,648
    Interest                                                        7,469,387
  Unrealized appreciation on interest rate swaps                    1,321,730
  Prepaid expenses and other assets                                    82,141
                                                                 ------------
     Total assets                                                $430,545,796
                                                                 ------------
LIABILITIES:
  Due to custodian                                               $  1,361,001
  Due to affiliate                                                    219,978
  Administration fee payable                                           25,684
  Accrued expenses                                                    147,489
                                                                 ------------
     Total liabilities                                           $  1,754,152
                                                                 ------------
PREFERRED SHARES AT REDEMPTION VALUE:
  $25,000 liquidation value per share applicable to
    4,040 shares                                                 $101,000,000
                                                                 ------------
NET ASSETS APPLICABLE TO COMMON SHAREOWNERS:
  Paid-in capital                                                $315,162,552
  Distributions in excess of net investment income                   (484,726)
  Accumulated net realized loss on investments and interest
    rate swaps                                                     (9,950,934)
  Net unrealized gain on investments                               21,743,022
  Net unrealized gain on interest rate swaps                        1,321,730
                                                                 ------------
     Net assets applicable to common shareowners                 $327,791,644
                                                                 ============
NET ASSET VALUE PER SHARE:
No par value, (unlimited number of shares authorized)
  Based on $327,791,644/22,120,893 common shares                 $      14.82
                                                                 ============


The accompanying notes are an integral part of these financial statements.   17
                                                                  


Pioneer Municipal High Income Trust
-------------------------------------------------------------------------------
STATEMENT OF OPERATIONS
-------------------------------------------------------------------------------
For the Six Months Ended 10/31/05


                                                        
INVESTMENT INCOME:
  Interest                                                     $  12,898,176
                                                               -------------
EXPENSES:
  Management fees                            $  1,347,189
  Administration fees and reimbursement           174,464
  Transfer agent fees and expenses                 25,353
  Auction agent fees                              134,934
  Custodian fees                                    6,556
  Registration fees                                11,876
  Professional fees                                29,468
  Printing expense                                  9,744
  Trustees' fees                                    6,904
  Pricing fees                                      8,484
  Insurance fees                                    9,602
  Miscellaneous                                     7,347
                                             ------------
    Total expenses                                             $   1,771,921
                                                               -------------
     Net investment income                                     $  11,126,255
                                                               -------------
REALIZED AND UNREALIZED GAIN (LOSS) ON
INVESTMENTS AND INTEREST RATE SWAPS:
  Net realized loss from:
    Investments                              $ (7,762,604)
    Interest rate swaps                           (32,619)     $  (7,795,223)
                                             ------------      -------------
  Change in net unrealized gain on:
    Investments                              $ (9,783,813)
    Interest rate swaps                           504,423      $  (9,279,390)
                                             ------------      -------------
     Net loss on investments and interest
       rate swaps                                              $ (17,074,613)
                                                               -------------
DIVIDENDS TO PREFERRED SHAREOWNERS
FROM NET INVESTMENT INCOME:                                    $  (1,196,555)
                                                               -------------
  Net decrease in net assets appilcable
    to common shareowners resulting
    from operations                                            $  (7,144,913)
                                                               ==============


18  The accompanying notes are an integral part of these financial statements.


Pioneer Municipal High Income Trust
-----------------------------------------------------------------------------
STATEMENTS OF CHANGES IN NET ASSETS
-----------------------------------------------------------------------------
For the Six Months Ended 10/31/05 and the Year Ended 4/30/05



                                                            Six Months
                                                              Ended
                                                             10/31/05         Year Ended
                                                           (unaudited)         4/30/05
                                                                    
FROM OPERATIONS:
  Net investment income                                   $  11,126,255     $  25,177,837
  Net realized gain (loss) on investments and interest
    rate swaps                                               (7,795,223)          258,653
  Change in net unrealized gain on investments and
    interest rate swaps                                      (9,279,390)       20,621,102
  Dividends and distributions to preferred
    shareowners from:
    Net investment income                                    (1,196,555)       (1,444,764)
    Net realized gains                                                -           (90,681)
                                                          -------------     -------------
     Net increase (decrease) in net assets
       applicable to common shareowners
       resulting from operations                          $  (7,144,913)    $  44,522,147
                                                          -------------     -------------
DIVIDENDS AND DISTRIBUTIONS TO COMMON
SHAREOWNERS FROM:
  Net investment income ($0.48 and $1.07
    per share, respectively)                              $ (10,618,029)    $ (23,669,356)
  Net realized gains ($0.00 and $0.09
    per share, respectively)                                          -        (2,011,719)
                                                          -------------     -------------
     Total distributions to common shareowners            $ (10,618,029)    $ (25,681,075)
                                                          -------------     -------------
FROM TRUST SHARE TRANSACTIONS:
  Changes in (estimated) common share
    offering expenses                                     $           -     $     123,849
                                                          -------------     -------------
     Net increase in net assets applicable to
       common shareowners resulting from Trust
       share transactions                                 $           -     $     123,849
                                                          -------------     -------------
     Net increase (decrease) in net assets
       applicable to common shareowners                   $ (17,762,942)    $  18,964,921
NET ASSETS APPLICABLE TO COMMON
SHAREOWNERS:
  Beginning of period                                       345,554,586       326,589,665
                                                          -------------     -------------
  End of period (including undistributed net
    investment income (loss) of $(484,726) and
    $203,603, respectively)                               $ 327,791,644     $ 345,554,586
                                                          =============     =============


The accompanying notes are an integral part of these financial statements.   19
                                                                  


Pioneer Municipal High Income Trust
--------------------------------------------------------------------------------
FINANCIAL HIGHLIGHTS
--------------------------------------------------------------------------------



                                                                     Six Months
                                                                        Ended                          7/21/03(b)
                                                                      10/31/05        Year Ended           to
                                                                     (unaudited)        4/30/05          4/30/04
                                                                                          
Per Common Share Operating Performance
Net asset value, beginning of period                                  $ 15.62          $ 14.76         $  14.33(c)
                                                                      --------         --------        ---------
Increase (decrease) from investment operations: (a)
 Net investment income (d)                                            $  0.50          $  1.14         $   0.80
 Net realized and unrealized gain (loss) on investments
   and interest rate swaps                                              (0.77)            0.95             0.46
 Dividends and distributions to preferred shareowners from:
 Net investment income                                                  (0.05)           (0.07)           (0.02)
 Net realized gains                                                         -             0.00(d)             -
                                                                      --------         --------        ---------
 Net increase (decrease) from investment operations                   $ (0.32)         $  2.02         $   1.24
 Dividends and distributions to common shareowners from:
 Net investment income                                                  (0.48)           (1.07)           (0.72)
 Net realized gains                                                         -            (0.09)               -
Changes in (estimated) with respect to issuance of:
 Common shares                                                              -             0.00(d)         (0.03)
 Preferred shares                                                           -                -            (0.06)
                                                                      --------         --------        ---------
Net increase (decrease) in net asset value                            $ (0.80)         $  0.86         $   0.43
                                                                      --------         --------        ---------
Net asset value, end of period(e)                                     $ 14.82          $ 15.62         $  14.76
                                                                      ========         ========        =========
Market value, end of period(e)                                        $ 14.38          $ 14.33         $  13.70
                                                                      --------         --------        ---------
Total return(f)                                                          3.62%           13.34%           (4.11)%
Ratios to average net assets of common shareowners
 Net expenses(g)                                                         1.02%(h)         1.04%            0.95%(h)
 Net investment income before preferred share dividends(h)               6.41%(h)         7.60%            6.91%(h)
 Preferred share dividends                                               0.69%(h)         0.43%            0.21% (h)
 Net investment income available to common shareowners                   5.72%(h)         7.17%            6.70% (h)
Portfolio turnover                                                          6%              25%              54%
Net assets of common shareowners, end of period (in thousands)        $327,792         $345,555        $326,590
Preferred shares outstanding (in thousands)                           $101,000         $101,000        $101,000
Asset coverage per preferred share, end of period                     $106,137         $110,533        $105,839
Average market value per preferred share                              $25,000          $25,000         $ 25,000
Liquidation value per preferred share                                 $25,000          $25,000         $ 25,000
Ratios to average net assets of common shareowners before
 reimbursement of organization expenses and expense reductions
 Net expenses(h)                                                         1.02%(h)         1.04%            0.96% (h)
 Net investment income before preferred share dividends(h)               6.41%(h)         7.60%            6.90% (h)
 Preferred share dividends                                               0.69%(h)         0.43%            0.21% (h)
 Net investment income available to common shareowners                   5.72%(h)         7.17%            6.69% (h)


(a) The per share data presented above is based upon the average common shares
    outstanding for the periods presented.
(b) Trust shares were first publicly offered on July 18, 2003.
(c) Net asset value immediately after the closing of the first public offering
    was $14.30.
(d) Amount is less than $0.01 per share.
(e) Net asset value and market value are published in Barron's on Saturday, The
    Wall Street Journal on Monday and The New York Times on Monday and Saturday.
   
(f) Total investment return is calculated assuming a purchase of common shares
    at the current market value on the first day and a sale at the current
    market value on the last day of the periods reported. Dividends and
    distributions, if any, are assumed for purposes of this calculation to be
    reinvested at prices obtained under the Trust's dividend reinvestment plan.
    Total investment return does not reflect brokerage commissions. Total
    investment return less than a full period is not annualized. Past
    performance is not a guarantee of future results.
(g) Ratios do not reflect the effect of dividend payments to preferred
    shareowners.
(h) Annualized.
    The information above represents the operating performance data for a share 
    of common stock outstanding, total investment return, ratios to average net
    assets of common shareowners and other supplemental data for the periods
    indicated. This information has been determined based upon financial
    information provided in the financial statements and market value data for
    the Trust's common shares.

20 The accompanying notes are an integral part of these financial statements.


Pioneer Municipal High Income Trust
--------------------------------------------------------------------------------
NOTES TO FINANCIAL STATEMENTS 10/31/05
--------------------------------------------------------------------------------

1. Organization and Significant Accounting Policies
Pioneer Municipal High Income Trust (the "Trust") was organized as a Delaware
statutory trust on March 13, 2003. Prior to commencing operations on July 21,
2003, the Trust had no operations other than matters relating to its
organization and registration as a diversified, closed-end management
investment company under the Investment Company Act of 1940, as amended.

The Trust may invest in municipal securities with a broad range of maturities
and credit ratings, including both investment grade and below investment grade
municipal securities.

The Trust invests in below investment grade (high-yield) municipal securities.
Debt securities rated below investment grade are commonly referred to as "junk
bonds" and are considered speculative. These securities involve greater risk of
loss, are subject to greater price volatility, and are less liquid, especially
during periods of economic uncertainty or change, than higher rated debt
securities.

The Trust's financial statements have been prepared in conformity with U.S.
generally accepted accounting principles that require the management of the
Trust to, among other things, make estimates and assumptions that affect the
reported amounts of assets and liabilities, the disclosure of contingent assets
and liabilities at the date of the financial statements, and the reported
amounts of income, expenses and gains and losses on investments during the
reporting period. Actual results could differ from those estimates. The
following is a summary of significant accounting policies followed by the Trust
in the preparation of its financial statements, which are consistent with those
policies generally accepted in the investment company industry:

A.  Security Valuation

    Security transactions are recorded as of trade date. Securities are valued
    at prices supplied by independent pricing services, which consider such
    factors as Treasury spreads, yields, maturities and ratings. Valuations
    may be supplemented by dealers and other sources, as required. The values
    of interest rate swaps are determined by obtaining dealer quotations.
    Securities for which market quotations are not readily available are
    valued at their fair values as determined by, or under the direction of,
    the Board of Trustees.

                                                                              21


Pioneer Municipal High Income Trust
--------------------------------------------------------------------------------
NOTES TO FINANCIAL STATEMENTS 10/31/05                             (continued)
--------------------------------------------------------------------------------

    As of October 31, 2005, there were no securities fair valued. Temporary
    cash investments are valued at amortized cost.

    Discount and premium on debt securities are accreted or amortized daily,
    respectively, on an effective yield to maturity basis and are included in
    interest income. Interest income is recorded on an accrual basis.

    Gains and losses on sales of investments are calculated on the identified
    cost method for both financial reporting and federal income tax purposes.

B.  Federal Income Taxes

    It is the Trust's policy to comply with the requirements of the Internal
    Revenue Code applicable to regulated investment companies and to
    distribute all of its taxable income and net realized capital gains, if
    any, to its shareowners. Therefore, no federal income tax provision is
    required.

    The amounts and characterizations of distributions to shareowners for
    financial reporting purposes are determined in accordance with federal
    income tax rules. Therefore, the source of the Trust's distributions may
    be shown in the accompanying financial statements as either from or in
    excess of net investment income or net realized gain on investment
    transactions, or from paid in-capital, depending on the type of book/tax
    differences that may exist.

    The tax character of current year distributions will be determined at the
    end of the fiscal year. The tax character of distributions paid to common
    and preferred shareowners during the year ended April 30, 2005 was as
    follows:



------------------------------------------
                                    2005
------------------------------------------
                            
 Distributions paid from:
 Tax exempt income             $25,094,466
 Ordinary income                 1,196,946
 Net long-term capital gains       925,108
                               -----------
 Total                         $27,216,520
                               ===========
------------------------------------------


22


Pioneer Municipal High Income Trust
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
  The following shows the components of distributable earnings on a
  federal income tax basis at April 30, 2005.




------------------------------------------------------------
                                                   2005
------------------------------------------------------------
                                       
  Undistributed tax-exempt income             $  1,074,362
  Dividend payable - common shares              (1,769,671)
  Unrealized appreciation                       33,243,038
  Post-October loss deferred                    (2,155,695)
                                              ------------
  Total                                       $ 30,392,034
                                              ============
------------------------------------------------------------


    The difference between book-basis and tax-basis unrealized appreciation is
    primarily attributable to the difference between book and tax amortization
    methods for premiums and discounts on fixed income securities, tax
    deferral of losses on wash sales and other book/tax differences.

C.  Automatic Dividend Reinvestment Plan

    All common shareowners automatically participate in the Automatic Dividend
    Reinvestment Plan (the "Plan"), under which participants receive all
    dividends and capital gain distributions (collectively, "dividends") in
    full and fractional common shares of the Trust in lieu of cash.
    Shareowners may elect not to participate in the Plan. Shareowners not
    participating in the Plan receive all dividends and capital gain
    distributions in cash. Participation in the Plan is completely voluntary
    and may be terminated or resumed at any time by notifying Mellon Investor
    Services LLC, the agent for shareowners in administering the Plan (the
    "Plan Agent"), prior to any dividend record date; otherwise such
    termination or resumption will be effective with respect to any
    subsequently declared dividend or other distribution. Whenever the Trust
    declares a dividend on common shares payable in cash, participants in the
    Plan will receive the equivalent in common shares acquired by the Plan
    Agent either (i) through receipt of additional unissued but authorized
    common shares from the Trust or (ii) by purchase of outstanding common
    shares on the New York Stock Exchange or elsewhere. If, on the payment
    date for any dividend the net asset value per common share is equal to or
    less than the market price per share plus estimated brokerage trading fees
    ("market premium"), the Plan Agent will invest the dividend amount in
    newly issued common shares.

                                                                              23


Pioneer Municipal High Income Trust
--------------------------------------------------------------------------------
NOTES TO FINANCIAL STATEMENTS 10/31/05                             (continued)
--------------------------------------------------------------------------------

    The number of newly issued common shares to be credited to each account
    will be determined by dividing the dollar amount of the dividend by the
    net asset value per common share on the date the shares are issued,
    provided that the maximum discount from the then current market price per
    share on the date of issuance does not exceed 5%. If, on the payment date
    for any dividend, the net asset value per common share is greater than the
    market value ("market discount"), the Plan Agent will invest the dividend
    amount in common shares acquired in open-market purchases. There are no
    brokerage charges with respect to newly issued common shares. However,
    each participant will pay a pro rata share of brokerage trading fees
    incurred with respect to the Plan Agent's open-market purchases.
    Participating in the Plan does not relieve shareowners from any federal,
    state or local taxes which may be due on dividends paid in any taxable
    year. Shareowners holding Plan shares in a brokerage account may not be
    able to transfer the shares to another broker and continue to participate
    in the Plan.

2. Management Agreement

PIM manages the Trust's portfolio. Management fees are calculated daily at the
annual rate of 0.60% of the Trust's average daily managed assets. "Managed
assets" is the average daily value of the Trust's total assets minus the sum of
the Trust's liabilities, which liabilities exclude debt related to leverage,
short-term debt and the aggregate liquidation preference of any outstanding
preferred shares. At October 31, 2005, $219,978 was payable to PIM related to
management fees.

In addition, under PIM's management and administration agreements, certain
other services and costs are paid by PIM and reimbursed by the Trust. For the
six months ended October 31, 2005, the Trust recorded $17,218 in reimbursements
and is included in "Administration fees and reimbursement" on the Statement of
Operations.

The Trust has retained Princeton Administrators, L.P., ("Princeton") an
affiliate of Merrill Lynch, Pierce, Fenner & Smith Incorporated, to provide
certain administrative services to the Trust on its behalf. The Trust pays
Princeton a monthly fee at an annual rate of 0.07% of the average weekly value
of the Trust's managed assets, subject to a minimum monthly fee of $10,000.

24


Pioneer Municipal High Income Trust
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

Also, PIM has agreed for the first three years of the Trust's investment
operations to limit the Trust's total annual expenses (excluding organizational
and offering costs for common and preferred shares, interest expense, the cost
of defending or prosecuting any claim or litigation to which the Trust is a
party, (together with any amount in judgment or settlement), indemnification
expenses or taxes incurred due to the failure of the Trust to qualify as a
regulated investment company under the Code or any other non-recurring or
non-operating expenses) to 0.80% of the Trust's average daily managed assets.
The dividend on any preferred shares is not an expense for this purpose. As of
October 31, 2005, the Trust's expenses were not reduced under such
arrangements.

3. Transfer Agents

Pioneer Investment Management Shareholder Services, Inc. ("PIMSS"), a wholly
owned indirect subsidiary of UniCredito Italiano, through a sub-transfer agency
agreement with Mellon Investor Services LLC, provides substantially all
transfer agent and shareowner services related to the Trust's common shares at
negotiated rates which are paid by the Trust. Deutsche Bank Trust Company
Americas is the transfer agent, registrar, dividend paying agent and redemption
agent with respect to the Trust's Auction Preferred Shares ("APS"). The Trust
pays Deutsche Bank Trust Company Americas an annual fee, as is agreed to from
time to time by the Trust and Deutsche Bank Trust Company Americas, for
providing such services.

4. Interest Rate Swaps

The Trust may enter into interest rate swap transactions to attempt to protect
itself from increasing dividend or interest expense on its leverage resulting
from increasing short-term interest rates. The cost of leverage may rise with
an increase in interest rates, generally having the effect of lower yields and
potentially lower dividends to common shareowners. Interest rate swaps can be
used to "lock in" the cost of leverage and reduce the negative impact that
rising short-term interest rates would have on the Trust's leveraging costs.

An interest rate swap is an agreement between two parties, which involves
exchanging a floating rate and fixed rate interest payments for a specified
period of time. Interest rate swaps involve the accrual of the net interest
payments between the parties on a daily basis, with the net amount recorded
within the unrealized appreciation/

                                                                              25


Pioneer Municipal High Income Trust
--------------------------------------------------------------------------------
NOTES TO FINANCIAL STATEMENTS 10/31/05                             (continued)
--------------------------------------------------------------------------------

depreciation of interest rate swaps on the Statement of Assets and Liabilities.
Once the interim payments are settled in cash, at the pre-determined dates
specified in the agreement, the net amount is recorded as realized gain or loss
from interest rate swaps on the Statement of Operations. During the term of the
swap, changes in the value of the swap are recognized as unrealized gains and
losses by "marking-to market" the market value of the swap based on values
obtained from dealer quotations. When the swap is terminated, the Trust will
record a realized gain or loss equal to the difference, if any, between the
proceeds from (or cost of) closing the contract and the cost basis of the
contract. The Trust is exposed to credit risk in the event of non-performance
by the other party to the interest rate swap. However, at October 31, 2005 the
Trust does not anticipate non-performance by any counterparty. Risk may also
arise with regard to market movements in the value of the swap arrangement that
do not exactly offset the changes in the related dividend requirement or
interest expense on the Trust's leverage.

Under the terms of the agreement entered into by the Trust, the Trust receives
a floating rate of interest and pays a fixed rate of interest for the term.
Details of the swap agreement outstanding as of October 31, 2005 were as
follows: 




---------------------------------------------------------------------------------------
                                    Notional
                   Termination       Amount      Fixed       Floating       Unrealized
 Counterparty          Date          (000)       Rate          Rate        Appreciation
---------------------------------------------------------------------------------------
                                                           
  UBS AG         April 5, 2009     $50,000     2.665%     1 month BMA     $1,321,730
---------------------------------------------------------------------------------------


5. Trust Shares

There are an unlimited number of common shares of beneficial interest
authorized. Of the 22,120,893 common shares of beneficial interest outstanding
at October 31, 2005, PIM owned 6,981 shares.

26


Pioneer Municipal High Income Trust
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

Transactions in common shares of beneficial interest for the six months ended
October 31, 2005 and the year ended April 30, 2005 were as follows:



--------------------------------------------------------------------------------
                                           10/2005         4/2005
--------------------------------------------------------------------------------
                                                   
  Shares outstanding at beginning
   of period                              22,120,893     22,120,893
  Reinvestment of distributions                    -              -
                                          ----------     ----------
  Shares outstanding at end of period     22,120,893     22,120,893
                                          ==========     ==========
--------------------------------------------------------------------------------

 
The Trust may classify or reclassify any unissued common shares of beneficial
interest into one or more series of preferred shares of beneficial interest. As
of October 31, 2005, there were 4,040 APS as follows: Series A-2,000 and Series
B-2,040.

Dividends on Series A and Series B APS are cumulative at a rate which is reset
every seven days based on the results of an auction. Dividend rates ranged from
1.78% to 2.80% during the six months ended October 31, 2005.

The Trust may not declare dividends or make other distributions on its common
shares or purchase any such shares if, at the time of the declaration,
distribution or purchase, asset coverage with respect to the outstanding
preferred shares would be less than 200%.

The APS are redeemable at the option of the Trust, in whole or in part, on any
dividend payment date at $25,000 per share plus any accumulated or unpaid
dividends, whether or not declared. The APS are also subject to mandatory
redemption at $25,000 per share plus any accumulated or unpaid dividends,
whether or not declared, if certain requirements relating to the composition of
the assets and liabilities of the Trust as set forth in the Agreement and
Declaration of Trust are not satisfied.

The holders of APS have voting rights equal to the holders of the Trust's
common shares (one vote per share) and will vote together with holders of the
common shares as a single class. However, holders of APS are also entitled to
elect two of the Trust's Trustees. In addition, the Investment Company Act of
1940, as amended, requires that along with approval by shareowners that might
otherwise be required, the approval of the holders of a majority of any
outstanding preferred shares, voting separately as a class would be required

                                                                              27


Pioneer Municipal High Income Trust
--------------------------------------------------------------------------------
NOTES TO FINANCIAL STATEMENTS 10/31/05                             (continued)
--------------------------------------------------------------------------------

to (a) adopt any plan of reorganization that would adversely affect the
preferred shares and (b) take any action requiring a vote of security holders,
including, among other things, changes in the Trust's subclassification as a
closed-end management investment company or changes in its fundamental
investment restrictions.

6. Subsequent Events

Subsequent to October 31, 2005, the Board of Trustees of the Trust declared a
dividend from undistributed net investment income of $0.08 per common share
payable November 30, 2005, to shareowners of record on November 15, 2005.

For the period November 1, 2005 to November 30, 2005, dividends declared on
preferred stock totaled $251,144 in aggregate for the two outstanding preferred
share series.

ADDITIONAL INFORMATION (unaudited)

During the period, there have been no material changes in the Trust's
investment objective or fundamental policies that have not been approved by the
shareowners. There have been no changes in the Trust's charter or By-Laws that
would delay or prevent a change in control of the Trust which have not been
approved by the shareowners. There have been no changes in the principal risk
factors associated with investment in the Trust. There have been no changes in
the persons who are primarily responsible for the day-to-day management of the
Trust's portfolio.

Notice is hereby given in accordance with Section 23(c) of the Investment
Company Act of 1940 that the Trust may purchase, from time to time, its common
shares in the open market.

28


Pioneer Municipal High Income Trust
--------------------------------------------------------------------------------
RESULTS OF SHAREOWNER MEETING
--------------------------------------------------------------------------------

On August 16, 2005, Pioneer Municipal High Income Trust held its annual meeting
of shareowners to elect three Class I Trustees. All three Trustees were
elected. Here are the detailed results of the votes.

Proposal 1 - To elect Class II Trustees.



-----------------------------------------------------
Nominee                     Affirmative     Withheld
-----------------------------------------------------
                                     
  Margaret B.W. Graham     22,145,070      390,510
  Osbert M. Hood           22,148,571      387,009
  John Winthrop            22,139,000      396,580
-----------------------------------------------------


                                                                              29


Pioneer Municipal High Income Trust
--------------------------------------------------------------------------------
TRUSTEES, OFFICERS AND SERVICE PROVIDERS
--------------------------------------------------------------------------------

     Trustees
     John F. Cogan, Jr., Chairman
     David R. Bock
     Mary K. Bush
     Margaret B.W. Graham
     Osbert M. Hood
     Marguerite A. Piret
     Stephen K. West
     John Winthrop
  
     Officers
     John F. Cogan, Jr., President
     Osbert M. Hood, Executive
      Vice President
     Vincent Nave, Treasurer
     Dorothy E. Bourassa, Secretary

Investment Adviser
Pioneer Investment Management, Inc.

Custodian
Brown Brothers Harriman & Co.

Legal Counsel
Wilmer Cutler Pickering Hale and Dorr LLP

Transfer Agent
Pioneer Investment Management Shareholder Services, Inc.

Shareowner Services and Sub-Transfer Agent
Mellon Investor Services LLC

Preferred Share Auction/Transfer Agent and Registrar
Deutsche Bank Trust Company Americas

Sub-Administrator
Princeton Administrators, L.P.

Proxy Voting Policies and Procedures of the Trust are available without charge,
upon request, by calling our toll free number (1-800-225-6292). Information
regarding how the Trust voted proxies relating to portfolio securities during
the most recent 12 months ended June 30, is publicly available to shareowners
at www.pioneerfunds.com. This information is also available on our web site at
www.pioneerfunds.com and on the Securities and Exchange Commission's web site
at http://www.sec.gov.

30


--------------------------------------------------------------------------------
                           This page for your notes.

--------------------------------------------------------------------------------
                           This page for your notes.

--------------------------------------------------------------------------------
                           This page for your notes.

--------------------------------------------------------------------------------
                           This page for your notes.

--------------------------------------------------------------------------------
                           This page for your notes.

--------------------------------------------------------------------------------
                           This page for your notes.

--------------------------------------------------------------------------------
HOW TO CONTACT PIONEER
--------------------------------------------------------------------------------

 We are pleased to offer a variety of convenient ways for you to contact Mellon
 for assistance or information.

     You can call Mellon Investor Services LLC for:

     Account Information                                        1-800-710-0935

     Telecommunications Device for the Deaf (TDD)               1-800-231-5469

     Or write to Mellon Investor Services LLC:



For                                           Write to
                                           
 General inquiries, lost dividend checks      P.O. Box 3315
                                              South Hackensack, NJ
                                              07606-1915
 Change of address, account consolidation     P.O. Box 3316
                                              South Hackensack, NJ
                                              07606-1916
 Lost stock certificates                      P.O. Box 3317
                                              South Hackensack, NJ
                                              07606-1917
 Stock transfer                               P.O. Box 3312
                                              South Hackensack, NJ
                                              07606-1912
 Dividend reinvestment plan (DRIP)            P.O. Box 3338
                                              South Hackensack, NJ
                                              07606-1938


 For additional information, please contact your investment advisor or visit
 our web site www.pioneerfunds.com.

 The Trust files a complete statement of investments with the Securities and
 Exchange Commission for the first and third quarters for each fiscal year on
 Form N-Q. Shareholders may view the filed Form N-Q by visiting the
 Commission's web site at http://www.sec.gov. The filed form may also be viewed
 and copied at the Commission's Public Reference Room in Washington, DC.
 Information regarding the operations of the Public Reference Room may be
 obtained by calling 1-800-SEC-0330.


ITEM 2. CODE OF ETHICS.

(a) Disclose whether, as of the end of the period covered by the report, the
registrant has adopted a code of ethics that applies to the registrant's
principal executive officer, principal financial officer, principal accounting
officer or controller, or persons performing similar functions, regardless of
whether these individuals are employed by the registrant or a third party.  If
the registrant has not adopted such a code of ethics, explain why it has not
done so.

The registrant has adopted, as of the end of the period covered by this report,
a code of ethics that applies to the registrant's principal executive officer,
principal financial officer, principal accounting officer and controller.

(b) For purposes of this Item, the term "code of ethics" means written standards
that are reasonably designed to deter wrongdoing and to promote:

        (1) Honest and ethical conduct, including the ethical handling of actual
        or apparent conflicts of interest between personal and professional
        relationships;

        (2) Full, fair, accurate, timely, and understandable disclosure in
        reports and documents that a registrant files with, or submits to, the
        Commission and in other public communications made by the registrant;

        (3) Compliance with applicable governmental laws, rules, and
        regulations;

        (4) The prompt internal reporting of violations of the code to an
        appropriate person or persons identified in the code; and

        (5) Accountability for adherence to the code.

(c) The registrant must briefly describe the nature of any amendment, during the
period covered by the report, to a provision of its code of ethics that applies
to the registrant's principal executive officer, principal financial officer,
principal accounting officer or controller, or persons performing similar
functions, regardless of whether these individuals are employed by the
registrant or a third party, and that relates to any element of the code of
ethics definition enumerated in paragraph (b) of this Item. The registrant must
file a copy of any such amendment as an exhibit pursuant to Item 10(a), unless
the registrant has elected to satisfy paragraph (f) of this Item by posting its
code of ethics on its website pursuant to paragraph (f)(2) of this Item, or by
undertaking to provide its code of ethics to any person without charge, upon
request, pursuant to paragraph (f)(3) of this Item.

The registrant has made no amendments to the code of ethics during the period
covered by this report.

(d) If the registrant has, during the period covered by the report, granted a
waiver, including an implicit waiver, from a provision of the code of ethics to
the registrant's principal executive officer, principal financial officer,
principal accounting officer or controller, or persons performing similar
functions, regardless of whether these individuals are employed by the
registrant or a third party, that relates to one or more of the items set forth
in paragraph (b) of this Item, the registrant must briefly describe the nature
of the waiver, the name of the person to whom the waiver was granted, and the
date of the waiver.

Not applicable.

(e) If the registrant intends to satisfy the disclosure requirement under
paragraph (c) or (d) of this Item regarding an amendment to, or a waiver from,
a provision of its code of ethics that applies to the registrant's principal
executive officer, principal financial officer, principal accounting officer or
controller, or persons performing similar functions and that relates to any
element of the code of ethics definition enumerated in paragraph (b) of this
Item by posting such information on its Internet website, disclose the
registrant's Internet address and such intention.

Not applicable.

(f) The registrant must:

        (1) File with the Commission, pursuant to Item 10(a), a copy of its code
        of ethics that applies to the registrant's principal executive officer,
        principal financial officer, principal accounting officer or controller,
        or persons performing similar functions, as an exhibit to its annual
        report on this Form N-CSR;

        (2) Post the text of such code of ethics on its Internet website and
        disclose, in its most recent report on this Form N-CSR, its Internet
        address and the fact that it has posted such code of ethics on its
        Internet website; or

        (3) Undertake in its most recent report on this Form N-CSR to provide to
        any person without charge, upon request, a copy of such code of ethics
        and explain the manner in which such request may be made.
	See Item 10(2)

ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT.

(a) (1)  Disclose that the registrant's board of trustees has determined that
         the registrant either:

    (i)  Has at least one audit committee financial expert serving on its audit
         committee; or

    (ii) Does not have an audit committee financial expert serving on its audit
         committee.

The registrant's Board of Trustees has determined that the registrant has at
least one audit committee financial expert.

    (2) If the registrant provides the disclosure required by paragraph
(a)(1)(i) of this Item, it must disclose the name of the audit committee
financial expert and whether that person is "independent." In order to be
considered "independent" for purposes of this Item, a member of an audit
committee may not, other than in his or her capacity as a member of the audit
committee, the board of trustees, or any other board committee:

    (i)  Accept directly or indirectly any consulting, advisory, or other
         compensatory fee from the issuer; or

    (ii) Be an "interested person" of the investment company as defined in
         Section 2(a)(19) of the Act (15 U.S.C. 80a-2(a)(19)).

Ms. Marguerite A. Piret, an independent trustee, is such an audit committee
financial expert.

    (3) If the registrant provides the disclosure required by paragraph (a)(1)
(ii) of this Item, it must explain why it does not have an audit committee
financial expert.

Not applicable.


ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES.

(a) Disclose, under the caption AUDIT FEES, the aggregate fees billed for each
of the last two fiscal years for professional services rendered by the principal
accountant for the audit of the registrant's annual financial statements or
services that are normally provided by the accountant in connection with
statutory and regulatory filings or engagements for those fiscal years.

N/A

(b) Disclose, under the caption AUDIT-RELATED FEES, the aggregate fees billed in
each of the last two fiscal years for assurance and related services by the
principal accountant that are reasonably related to the performance of the audit
of the registrant's financial statements and are not reported under
paragraph (a) of this Item. Registrants shall describe the nature of the
services comprising the fees disclosed under this category.

N/A

(c) Disclose, under the caption TAX FEES, the aggregate fees billed in each of
the last two fiscal years for professional services rendered by the principal
accountant for tax compliance, tax advice, and tax planning. Registrants shall
describe the nature of the services comprising the fees disclosed under this
category.

N/A  

(d) Disclose, under the caption ALL OTHER FEES, the aggregate fees billed in
each of the last two fiscal years for products and services provided by the
principal accountant, other than the services reported in paragraphs (a) through
(c) of this Item. Registrants shall describe the nature of the services
comprising the fees disclosed under this category.

N/A

(e) (1) Disclose the audit committee's pre-approval policies and procedures
described in paragraph (c)(7) of Rule 2-01 of Regulation S-X.

 PIONEER TrustS
            APPROVAL OF AUDIT, AUDIT-RELATED, TAX AND OTHER SERVICES
                       PROVIDED BY THE INDEPENDENT AUDITOR

                  SECTION I - POLICY PURPOSE AND APPLICABILITY

The Pioneer Trusts recognize the importance of maintaining the independence of
their outside auditors. Maintaining independence is a shared responsibility
involving Pioneer Investment Management, Inc ("PIM"), the audit committee and
the independent auditors.

The Trusts recognize that a Trust's independent auditors: 1) possess 
knowledge of the Trusts, 2) are able to incorporate certain services 
into the scope of the audit, thereby avoiding redundant work, cost and 
disruption of Trust personnel and processes, and 3) have expertise that 
has value to the Trusts. As a result, there are situations where it is 
desirable to use the Trust's independent auditors for services in 
addition to the annual audit and where the potential for conflicts of 
interests are minimal. Consequently, this policy, which is intended to 
comply with Rule 210.2-01(C)(7), sets forth guidelines and procedures to 
be followed by the Trusts when retaining the independent audit firm
to perform audit, audit-related tax and other services under those
circumstances, while also maintaining independence.

Approval of a service in accordance with this policy for a Trust shall also
constitute approval for any other Trust whose pre-approval is required 
pursuant to Rule 210.2-01(c)(7)(ii).

In addition to the procedures set forth in this policy, any non-audit services
that may be provided consistently with Rule 210.2-01 may be approved by the
Audit Committee itself and any pre-approval that may be waived in accordance
with Rule 210.2-01(c)(7)(i)(C) is hereby waived.

Selection of a Trust's independent auditors and their compensation shall be
determined by the Audit Committee and shall not be subject to this policy.



                               SECTION II - POLICY

---------------- -------------------------------- -------------------------------------------------
SERVICE           SERVICE CATEGORY DESCRIPTION      SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES    
CATEGORY                                                                                           
---------------- -------------------------------- -------------------------------------------------
                                            
I.  AUDIT        Services that are directly       o Accounting research assistance
SERVICES         related to performing the        o SEC consultation, registration
                 independent audit of the Trusts     statements, and reporting
                                                  o Tax accrual related matters
                                                  o Implementation of new accounting
                                                    standards
                                                  o Compliance letters (e.g. rating agency
                                                    letters)
                                                  o Regulatory reviews and assistance
                                                    regarding financial matters
                                                  o Semi-annual reviews (if requested)
                                                  o Comfort letters for closed end
                                                    offerings
---------------- -------------------------------- -------------------------------------------------
II.              Services which are not           o AICPA attest and agreed-upon procedures        
AUDIT-RELATED    prohibited under Rule            o Technology control assessments                 
SERVICES         210.2-01(C)(4) (the "Rule")      o Financial reporting control assessments        
                 and are related extensions of    o Enterprise security architecture               
                 the audit services support the     assessment                                     
                 audit, or use the                                                                 
                 knowledge/expertise gained                                                        
                 from the audit procedures as a                                                    
                 foundation to complete the                                                        
                 project.  In most cases, if                                                       
                 the Audit-Related Services are                                                    
                 not performed by the Audit                                                        
                 firm, the scope of the Audit                                                      
                 Services would likely                                                             
                 increase.  The Services are                                                       
                 typically well-defined and                                                        
                 governed by accounting                                                            
                 professional standards (AICPA,                                                    
                 SEC, etc.)                                                                        
---------------- -------------------------------- -------------------------------------------------

 ------------------------------------- ------------------------------------
                                    
   AUDIT COMMITTEE APPROVAL POLICY               AUDIT COMMITTEE
                                                REPORTING POLICY
 ------------------------------------- ------------------------------------
                                    
 o "One-time" pre-approval             o A summary of all such
   for the audit period for all          services and related fees
   pre-approved specific service         reported at each regularly
   subcategories.  Approval of the       scheduled Audit Committee
   independent auditors as               meeting.
   auditors for a Trust shall
   constitute pre approval for
   these services.
 ------------------------------------- ------------------------------------
 o "One-time" pre-approval             o A summary of all such
   for the Trust fiscal year within       services and related fees
   a specified dollar limit              (including comparison to
   for all pre-approved                  specified dollar limits)
   specific service subcategories        reported quarterly.

 o Specific approval is
   needed to exceed the
   pre-approved dollar limit for
   these services (see general
   Audit Committee approval policy
   below for details on obtaining
   specific approvals)

 o Specific approval is
   needed to use the Trust's
   auditors for Audit-Related
   Services not denoted as
   "pre-approved", or
   to add a specific service
   subcategory as "pre-approved"
 ------------------------------------- ------------------------------------




                     SECTION III - POLICY DETAIL, CONTINUED

----------------------- --------------------------- ----------------------------------------------- 
   SERVICE CATEGORY          SERVICE CATEGORY        SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES    
                               DESCRIPTION                                                          
----------------------- --------------------------- ----------------------------------------------- 
                                              
III. TAX SERVICES       Services which are not      o Tax planning and support                      
                        prohibited by the Rule,     o Tax controversy assistance                    
                        if an officer of the Trust   o Tax compliance, tax returns, excise           
                        determines that using the     tax returns and support                       
                        Trust's auditor to provide   o Tax opinions                                  
                        these services creates                                                      
                        significant synergy in                                                      
                        the form of efficiency,                                                     
                        minimized disruption, or                                                    
                        the ability to maintain a                                                   
                        desired level of                                                            
                        confidentiality.                                                            
----------------------- --------------------------- ----------------------------------------------- 

------------------------------------- -------------------------
  AUDIT COMMITTEE APPROVAL POLICY         AUDIT COMMITTEE
                                          REPORTING POLICY
------------------------------------- -------------------------
------------------------------------- -------------------------
o "One-time" pre-approval             o A summary of
  for the Trust fiscal  year             all such services and
  within a specified dollar limit       related fees
  				        (including comparison
  			                to specified dollar
  			                limits) reported
  			                quarterly.

o Specific approval is
  needed to exceed the
  pre-approved dollar limits for
  these services (see general
  Audit Committee approval policy
  below for details on obtaining
  specific approvals)

o Specific approval is
  needed to use the Trust's
  auditors for tax services not
  denoted as pre-approved, or to add a specific
  service subcategory as
  "pre-approved"
------------------------------------- -------------------------




                     SECTION III - POLICY DETAIL, CONTINUED

----------------------- --------------------------- -----------------------------------------------
   SERVICE CATEGORY          SERVICE CATEGORY        SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES   
                               DESCRIPTION                                                         
----------------------- --------------------------- -----------------------------------------------
                                              
IV.  OTHER SERVICES     Services which are not      o Business Risk Management support             
                        prohibited by the Rule,     o Other control and regulatory                 
A. SYNERGISTIC,         if an officer of the Trust     compliance projects                          
UNIQUE QUALIFICATIONS   determines that using the                                                  
                        Trust's auditor to provide                                                  
                        these services creates                                                     
                        significant synergy in                                                     
                        the form of efficiency,                                                    
                        minimized disruption,                                                      
                        the ability to maintain a                                                  
                        desired level of                                                           
                        confidentiality, or where                                                  
                        the Trust's auditors                                                        
                        posses unique or superior                                                  
                        qualifications to provide                                                  
                        these services, resulting                                                  
                        in superior value and                                                      
                        results for the Trust.                                                      
----------------------- --------------------------- -----------------------------------------------

--------------------------------------- ------------------------
    AUDIT COMMITTEE APPROVAL POLICY         AUDIT COMMITTEE
                                            REPORTING POLICY
------------------------------------- --------------------------
                                   
o "One-time" pre-approval             o A summary of
  for the Trust fiscal year within       all such services and
  a specified dollar limit              related fees
  			               (including comparison
  			                to specified dollar
  				        limits) reported
                                        quarterly.
o Specific approval is
  needed to exceed the
  pre-approved dollar limits for
  these services (see general
  Audit Committee approval policy
  below for details on obtaining
  specific approvals)

o Specific approval is
  needed to use the Trust's
  auditors for "Synergistic" or
  "Unique Qualifications" Other
  Services not denoted as
  pre-approved to the left, or to
  add a specific service
  subcategory as "pre-approved"
------------------------------------- --------------------------




                     SECTION III - POLICY DETAIL, CONTINUED

----------------------- ------------------------- -----------------------------------------------
   SERVICE CATEGORY         SERVICE CATEGORY        SPECIFIC PROHIBITED SERVICE SUBCATEGORIES    
                              DESCRIPTION                                                        
----------------------- ------------------------- -----------------------------------------------
                                            
PROHIBITED  SERVICES    Services which result     1. Bookkeeping or other services
                        in the auditors losing       related to the accounting records or
                        independence status          financial statements of the audit
                        under the Rule.              client*
                                                  2. Financial information systems design
                                                     and implementation*
                                                  3. Appraisal or valuation services,
                                                     fairness* opinions, or
                                                     contribution-in-kind reports
                                                  4. Actuarial services (i.e., setting
                                                     actuarial reserves versus actuarial
                                                     audit work)*
                                                  5. Internal audit outsourcing services*
                                                  6. Management functions or human
                                                     resources
                                                  7. Broker or dealer, investment
                                                     advisor, or investment banking services
                                                  8. Legal services and expert services
                                                     unrelated to the audit
                                                  9. Any other service that the Public
                                                     Company Accounting Oversight Board
                                                     determines, by regulation, is
                                                     impermissible
----------------------- ------------------------- -----------------------------------------------

------------------------------------------- ------------------------------
     AUDIT COMMITTEE APPROVAL POLICY               AUDIT COMMITTEE
                                                  REPORTING POLICY
------------------------------------------- ------------------------------
o These services are not to be              o A summary of all
  performed with the exception of the(*)      services and related
  services that may be permitted              fees reported at each
  if they would not be subject to audit       regularly scheduled
  procedures at the audit client (as          Audit Committee meeting
  defined in rule 2-01(f)(4)) level           will serve as continual
  the firm providing the service.             confirmation that has
  				              not provided any
                                              restricted services.
------------------------------------------- ------------------------------

--------------------------------------------------------------------------------
GENERAL AUDIT COMMITTEE APPROVAL POLICY:
o For all projects, the officers of the Trusts and the Trust's auditors will 
each   make an assessment to determine that any proposed projects will not 
impair independence.

o Potential services will be classified into the four non-restricted service
  categories and the "Approval of Audit, Audit-Related, Tax and Other
  Services" Policy above will be applied. Any services outside the specific
  pre-approved service subcategories set forth above must be specifically
  approved by the Audit Committee.

o At least quarterly, the Audit Committee shall review a report summarizing the
  services by service category, including fees, provided by the Audit firm as
  set forth in the above policy.

--------------------------------------------------------------------------------


    (2) Disclose the percentage of services described in each of paragraphs (b)
   through (d) of this Item that were approved by the audit committee pursuant
   to paragraph (c)(7)(i)(C) of Rule 2-01 of Regulation S-X.

    N/A

(f) If greater than 50 percent, disclose the percentage of hours expended on the
principal accountant's engagement to audit the registrant's financial statements
for the most recent fiscal year that were attributed to work performed by
persons other than the principal accountant's full-time, permanent employees.

N/A

(g) Disclose the aggregate non-audit fees billed by the registrant's accountant
for services rendered to the registrant, and rendered to the registrant's
investment adviser (not including any sub-adviser whose role is primarily
portfolio management and is subcontracted with or overseen by another investment
adviser), and any entity controlling, controlled by, or under common control
with the adviser that provides ongoing services to the registrant for each of
the last two fiscal years of the registrant.



N/A


(h) Disclose whether the registrant's audit committee of the board of trustees
has considered whether the provision of non-audit services that were rendered to
the registrant's investment adviser (not including any subadviser whose role is
primarily portfolio management and is subcontracted with or overseen by another
investment adviser), and any entity controlling, controlled by, or under common
control with the investment adviser that provides ongoing services to the
registrant that were not pre-approved pursuant to paragraph (c)(7)(ii) of
Rule 2-01 of Regulation S-X is compatible with maintaining the principal
accountant's independence.

The Trust's independent auditor, Ernst & 
Young LLP ("E&Y"), has advised the Audit 
Committee of the Trust's Board of Trustees that 
E&Ys Spanish affiliate (E&Y Spain) performed  
certain non-audit work for Pioneer Global 
Investments Limited ("PGIL"), an affiliate of the 
Trusts investment adviser.  The services involved 
the receipt and disbursement of monies transferred 
to E&Y Spain by PGIL in payment of individual 
payroll and related income tax withholdings due on 
returns prepared by E&Y Spain for certain PGIL 
employees located in Spain from February 2001 to 
October 2005.  E&Y became auditors of the Trust in 
May 2002.  These payroll and tax services were 
discontinued in November 2005.  The annual fee 
received by E&Y Spain for all such services totaled 
approximately 9,000 Euro per year. E&Y has informed 
the Audit Committee that based on its internal 
reviews and the de minimus nature of the services 
provided and fees received, E&Y does not believe 
its independence with respect to the Trust has been 
impaired or that it is disqualified from acting as 
independent auditors to the Trust.

N/A



Item 5. Audit Committee of Listed Registrants 

(a) If the registrant is a listed issuer as defined in Rule 10A-3 
under the Exchange Act (17 CFR 240.10A-3), state whether 
or not the registrant has a separately-designated standing
 audit committee established in accordance with Section 
3(a)(58)(A) of the Exchange Act (15 U.S.C. 78c(a)(58)(A)). 
If the registrant has such a committee, however designated, 
identify each committee member. If the entire board of directors
is acting as the registrants audit committee as specified in 
Section 3(a)(58)(B) of the Exchange Act (15 U.S.C. 78c(a)(58)(B)), 
so state. 

The registrant has a separately-designated standing audit
committe eestablished in accordance with Section 
3(a)(58)(A) of the Exchange Act (15 U.S.C. 78c(a)(58)(A)).

(b) If applicable, provide the disclosure required by Rule 10A-3(d)
under the Exchange Act (17 CFR 240.10A-3(d)) regarding an exemption 
from the listing standards for audit committees.

N/A

Item 6. Schedule of Investments. 

File Schedule I Investments in securities of unaffiliated issuers
as of the close of the reporting period as set forth in 210.12- 
12 of Regulation S-X [17 CFR 210.12-12], unless the schedule is 
included as part of the report to shareholders filed under Item 
1 of this Form. 

Included in Item 1





ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR 
CLOSED-END MANAGEMENT INVESTMENT COMPANIES.

A closed-end management investment company that is filing an annual report on
this Form N-CSR must, unless it invests exclusively in non-voting securities,
describe the policies and procedures that it uses to determine how to vote
proxies relating to portfolio securities, including the procedures that the
company uses when a vote presents a conflict between the interests of its
shareholders, on the one hand, and those of the company's investment adviser;
principal underwriter; or any affiliated person (as defined in Section 2(a)(3)
of the Investment Company Act of 1940 (15 U.S.C. 80a-2(a)(3)) and the rules
thereunder) of the company, its investment adviser, or its principal
underwriter, on the other. Include any policies and procedures of the company's
investment adviser, or any other third party, that the company uses, or that are
used on the company's behalf, to determine how to vote proxies relating to
portfolio securities.

Proxy Voting Policies and Procedures of
                       Pioneer Investment Management, Inc.

                            VERSION DATED July, 2004

                                    Overview

   Pioneer Investment Management, Inc. ("Pioneer") is a fiduciary that owes
   each of its client's duties of care and loyalty with respect to all
   services undertaken on the client's behalf, including proxy voting. When
   Pioneer has been delegated proxy-voting authority for a client, the duty of
   care requires Pioneer to monitor corporate events and to vote the proxies.
   To satisfy its duty of loyalty, Pioneer must place its client's interests
   ahead of its own and must cast proxy votes in a manner consistent with the
   best interest of its clients. Pioneer will vote all proxies presented in a
   timely manner.

   The Proxy Voting Policies and Procedures are designed to complement
   Pioneer's investment policies and procedures regarding its general
   responsibility to monitor the performance and/or corporate events of
   companies that are issuers of securities held in accounts managed by
   Pioneer. Pioneer's Proxy Voting Policies summarize Pioneer's position on a
   number of issues solicited by companies held by Pioneer's clients. The
   policies are guidelines that provide a general indication on how Pioneer
   would vote but do not include all potential voting scenarios.

   Pioneer's Proxy Voting Procedures detail monitoring of voting, exception
   votes, and review of conflicts of interest and ensure that case-by-case
   votes are handled within the context of the overall guidelines (i.e. best
   interest of client). The overriding goal is that all proxies for US and
   non-US companies that are received promptly will be voted in accordance
   with Pioneer's policies or specific client instructions. All shares in a
   company held by Pioneer-managed accounts will be voted alike, unless a
   client has given us specific voting instructions on an issue or has not
   delegated authority to us or the Proxy Voting Oversight Group determines
   that the circumstances justify a different approach.

   Pioneer does not delegate the authority to vote proxies relating to its
   clients to any of its affiliates, which include other subsidiaries of
   UniCredito.

   Any questions about these policies and procedures should be directed to the
   Proxy Coordinator.

                                       1


                             Proxy Voting Procedures

   Proxy Voting Service
   Pioneer has engaged an independent proxy voting service to assist in the
   voting of proxies. The proxy voting service works with custodians to ensure
   that all proxy materials are received by the custodians and are processed
   in a timely fashion. To the extent applicable, the proxy voting service
   votes all proxies in accordance with the proxy voting policies established
   by Pioneer. The proxy voting service will refer proxy questions to the
   Proxy Coordinator (described below) for instructions under circumstances
   where: (1) the application of the proxy voting guidelines is unclear; (2) a
   particular proxy question is not covered by the guidelines; or (3) the
   guidelines call for specific instructions on a case-by-case basis. The
   proxy voting service is also requested to call to the Proxy Coordinator's
   attention specific proxy questions that, while governed by a guideline,
   appear to involve unusual or controversial issues. Pioneer reserves the
   right to attend a meeting in person and may do so when it determines that
   the company or the matters to be voted on at the meeting are strategically
   important to its clients.

   Proxy Coordinator
   Pioneer's Director of Investment Operations (the "Proxy Coordinator")
   coordinates the voting, procedures and reporting of proxies on behalf of
   Pioneer's clients. The Proxy Coordinator will deal directly with the proxy
   voting service and, in the case of proxy questions referred by the proxy
   voting service, will solicit voting recommendations and instructions from
   the Director of Portfolio Management US or, to the extent applicable,
   investment sub-advisers. The Proxy Coordinator is responsible for ensuring
   that these questions and referrals are responded to in a timely fashion and
   for transmitting appropriate voting instructions to the proxy voting
   service. The Proxy Coordinator is responsible for verifying with the
   Compliance Department whether Pioneer's voting power is subject to any
   limitations or guidelines issued by the client (or in the case of an
   employee benefit plan, the plan's trustee or other fiduciaries).

   Referral Items
   From time to time, the proxy voting service will refer proxy questions to
   the Proxy Coordinator that are described by Pioneer's policy as to be voted
   on a case-by-case basis, that are not covered by Pioneer's guidelines or
   where Pioneer's guidelines may be unclear with respect to the matter to be
   voted on. Under such certain circumstances, the Proxy Coordinator will seek
   a written voting recommendation from the Director of Portfolio Management
   US. Any such recommendation will include: (i) the manner in which the
   proxies should be voted; (ii) the rationale underlying any such decision;
   and (iii) the disclosure of any contacts or communications made between
   Pioneer and any outside parties concerning the proxy proposal prior to the
   time that the voting instructions are provided. In addition, the Proxy
   Coordinator will ask the Compliance Department to review the question for
   any actual or apparent conflicts of interest as described below under
   "Conflicts of

                                       2


   Interest." The Compliance Department will provide a "Conflicts of Interest
   Report," applying the criteria set forth below under "Conflicts of
   Interest," to the Proxy Coordinator summarizing the results of its review.
   In the absence of a conflict of interest, the Proxy Coordinator will vote
   in accordance with the recommendation of the Director of Portfolio
   Management US.

   If the matter presents a conflict of interest for Pioneer, then the Proxy
   Coordinator will refer the matter to the Proxy Voting Oversight Group for a
   decision. In general, when a conflict of interest is present, Pioneer will
   vote according to the recommendation of the Director of Portfolio
   Management US where such recommendation would go against Pioneer's interest
   or where the conflict is deemed to be immaterial. Pioneer will vote
   according to the recommendation of its proxy voting service when the
   conflict is deemed to be material and the Pioneer's internal vote
   recommendation would favor Pioneer's interest, unless a client specifically
   requests Pioneer to do otherwise. When making the final determination as to
   how to vote a proxy, the Proxy Voting Oversight Group will review the
   report from the Director of Portfolio Management US and the Conflicts of
   Interest Report issued by the Compliance Department.

   Conflicts of Interest
   A conflict of interest occurs when Pioneer's interests interfere, or appear
   to interfere with the interests of Pioneer's clients. Occasionally, Pioneer
   may have a conflict that can affect how its votes proxies. The conflict may
   be actual or perceived and may exist when the matter to be voted on
   concerns:

       o      An affiliate of Pioneer,  such as another company  belonging to
              the UniCredito  Italiano  S.p.A.  banking group (a "UniCredito
              Affiliate");

       o      An issuer of a security for which Pioneer acts as a sponsor,
              advisor, manager, custodian, distributor, underwriter, broker, or
              other similar capacity (including those securities specifically
              declared by PGAM to present a conflict of interest for Pioneer);

       o      An issuer of a security for which UniCredito has informed Pioneer
              that a UniCredito Affiliate acts as a sponsor, advisor, manager,
              custodian, distributor, underwriter, broker, or other similar
              capacity; or

       o      A person with whom Pioneer (or any of its affiliates) has an
              existing, material contract or business relationship that was not
              entered into in the ordinary course of Pioneer's business.

       o      Pioneer will abstain from voting with respect to companies
              directly or indirectly owned by UniCredito Italiano Group, unless
              otherwise directed by a client. In addition, Pioneer will inform
              PGAM Global Compliance and the PGAM Independent Directors before
              exercising such rights.

   Any associate involved in the proxy voting process with knowledge of any
   apparent or actual conflict of interest must disclose such conflict to the
   Proxy Coordinator and the Compliance Department. The Compliance Department
   will review each item referred to Pioneer to determine whether an actual or
   potential conflict of interest with Pioneer exists in connection with the
   proposal(s) to be voted upon. The review will be conducted by comparing the
   apparent parties affected by the proxy proposal being

                                       3


   voted upon against the Compliance Department's internal list of interested
   persons and, for any matches found, evaluating the anticipated magnitude
   and possible probability of any conflict of interest being present. For
   each referral item, the determination regarding the presence or absence of
   any actual or potential conflict of interest will be documented in a
   Conflicts of Interest Report to the Proxy Coordinator.

   Securities Lending
   In conjunction with industry standards Proxies are not available to be
   voted when the shares are out on loan through either Pioneer's lending
   program or a client's managed security lending program. However, Pioneer
   will reserve the right to recall lent securities so that they may be voted
   according to the Pioneer's instructions. If a portfolio manager would like
   to vote a block of previously lent shares, the Proxy Coordinator will work
   with the portfolio manager and Investment Operations to recall the
   security, to the extent possible, to facilitate the vote on the entire
   block of shares.

   Share-Blocking

   "Share-blocking" is a market practice whereby shares are sent to a
   custodian (which may be different than the account custodian) for record
   keeping and voting at the general meeting. The shares are unavailable for
   sale or delivery until the end of the blocking period (typically the day
   after general meeting date).

   Pioneer will vote in those countries with "share-blocking." In the event a
   manager would like to sell a security with "share-blocking", the Proxy
   Coordinator will work with the Portfolio Manager and Investment Operations
   Department to recall the shares (as allowable within the market time-frame
   and practices) and/or communicate with executing brokerage firm. A list of
   countries with "share-blocking" is available from the Investment Operations
   Department upon request.

   Record Keeping
   The Proxy Coordinator shall ensure that Pioneer's proxy voting service:

       o   Retains a copy of the proxy statement received (unless the proxy
           statement is available from the SEC's Electronic Data Gathering,
           Analysis, and Retrieval (EDGAR) system);

       o   Retains a record of the vote cast;

       o   Prepares Form N-PX for filing on behalf of each client that is a
           registered investment company; and

       o   Is able to promptly provide Pioneer with a copy of the voting
           record upon its request.

                                       4


   The Proxy Coordinator shall ensure that for those votes that may require
   additional documentation (i.e. conflicts of interest, exception votes and
   case-by-case votes) the following records are maintained:

       o    A record memorializing the basis for each referral vote cast;

       o    A copy of any document created by Pioneer that was material in
            making the decision on how to vote the subject proxy; and

       o    A copy of any conflict notice, conflict consent or any other
            written communication (including emails or other electronic
            communications) to or from the client (or in the case of an
            employee benefit plan, the plan's trustee or other fiduciaries)
            regarding the subject proxy vote cast by, or the vote
            recommendation of, Pioneer.

       o    Pioneer shall maintain the above records in the client's file for a
            period not less than ten (10) years.

     Disclosure
     Pioneer shall take reasonable measures to inform its clients of the process
     or procedures clients must follow to obtain information regarding how
     Pioneer voted with respect to assets held in their accounts. In addition,
     Pioneer shall describe to clients its proxy voting policies and procedures
     and will furnish a copy of its proxy voting policies and procedures upon
     request. This information may be provided to clients through Pioneer's Form
     ADV (Part II) disclosure, by separate notice to the client, or through
     Pioneer's website.

     Proxy Voting Oversight Group
     The members of the Proxy Voting Oversight Group are Pioneer's: Director of
     Portfolio Management US, Head of Investment Operations, and Director of
     Compliance. Other members of Pioneer will be invited to attend meetings and
     otherwise participate as necessary. The Head of Investment Operations will
     chair the Proxy Voting Oversight Group.

     The Proxy Voting Oversight Group is responsible for developing, evaluating,
     and changing (when necessary) Pioneer's Proxy Voting Policies and
     Procedures. The group meets at least annually to evaluate and review these
     policies and procedures and the services of its third-party proxy voting
     service. In addition, the Proxy Voting Oversight Group will meet as
     necessary to vote on referral items and address other business as
     necessary.

     Amendments
     Pioneer may not amend its Proxy Voting Policies And Procedures without the
     prior approval of the Proxy Voting Oversight Group and its corporate
     parent, Pioneer Global Asset Management S.p.A

                                       5


   Proxy Voting Policies
   Pioneer's sole concern in voting proxies is the economic effect of the
   proposal on the value of portfolio holdings, considering both the short-
   and long-term impact. In many instances, Pioneer believes that supporting
   the company's strategy and voting "for" management's proposals builds
   portfolio value. In other cases, however, proposals set forth by management
   may have a negative effect on that value, while some shareholder proposals
   may hold the best prospects for enhancing it. Pioneer monitors developments
   in the proxy-voting arena and will revise this policy as needed.

   All proxies that are received promptly will be voted in accordance with the
   specific policies listed below. All shares in a company held by
   Pioneer-managed accounts will be voted alike, unless a client has given us
   specific voting instructions on an issue or has not delegated authority to
   us. Proxy voting issues will be reviewed by Pioneer's Proxy Voting
   Oversight Group, which consists of the Director of Portfolio Management US,
   the Director of Investment Operations (the Proxy Coordinator), and the
   Director of Compliance.

   Pioneer has established Proxy Voting Procedures for identifying and
   reviewing conflicts of interest that may arise in the voting of proxies.

   Clients may request, at any time, a report on proxy votes for securities
   held in their portfolios and Pioneer is happy to discuss our proxy votes
   with company management. Pioneer retains a proxy voting service to provide
   research on proxy issues and to process proxy votes.

Administrative
   While administrative items appear infrequently in U.S. issuer proxies, they
   are quite common in non-U.S. proxies.

   We will generally support these and similar management proposals:

       o    Corporate name change.

       o    A change of corporate headquarters.

       o    Stock exchange listing.

       o    Establishment of time and place of annual meeting.

       o    Adjournment or postponement of annual meeting.

       o    Acceptance/approval of financial statements.

       o    Approval of dividend payments, dividend reinvestment plans and other
            dividend-related proposals.

       o    Approval of minutes and other formalities.

                                       6


       o    Authorization of the transferring of reserves and allocation of
            income.

       o    Amendments to authorized signatories.

       o    Approval of accounting method changes or change in fiscal year-end.

       o    Acceptance of labor agreements.

       o    Appointment of internal auditors.

   Pioneer will vote on a case-by-case basis on other routine business;
   however, Pioneer will oppose any routine business proposal if insufficient
   information is presented in advance to allow Pioneer to judge the merit of
   the proposal. Pioneer has also instructed its proxy voting service to
   inform Pioneer of its analysis of any administrative items inconsistent, in
   its view, with supporting the value of Pioneer portfolio holdings so that
   Pioneer may consider and vote on those items on a case-by-case basis.

Auditors
     We normally vote for proposals to:

       o    Ratify the auditors. We will consider a vote against if we are
            concerned about the auditors' independence or their past work for
            the company. Specifically, we will oppose the ratification of
            auditors and withhold votes from audit committee members if
            non-audit fees paid by the company to the auditing firm exceed the
            sum of audit fees plus audit-related fees plus permissible tax
            fees according to the disclosure categories proposed by the
            Securities and Exchange Commission.

       o    Restore shareholder rights to ratify the auditors.

     We will normally oppose proposals that require companies to:

       o    Seek bids from other auditors.

       o    Rotate auditing firms, except where the rotation is statutorily
            required or where rotation would demonstrably strengthen financial
            disclosure.

       o    Indemnify auditors.

       o    Prohibit auditors from engaging in non-audit services for the
            company.

     Board of Directors
     On issues related to the board of directors, Pioneer normally supports
     management. We will, however, consider a vote against management in
     instances where corporate performance has been very poor or where the board
     appears to lack independence.

                                       7


     General Board Issues
     Pioneer will vote for:

       o    Audit, compensation and nominating committees composed of
            independent directors exclusively.

       o    Indemnification for directors for actions taken in good faith in
            accordance with the business judgment rule. We will vote against
            proposals for broader indemnification.

       o    Changes in board size that appear to have a legitimate business
            purpose and are not primarily for anti-takeover reasons.

       o    Election of an honorary director.

     We will vote against:

       o    Minimum stock ownership by directors.

       o    Term limits for directors. Companies benefit from experienced
            directors, and shareholder control is better achieved through
            annual votes.

       o    Requirements for union or special interest representation on the
            board.

       o    Requirements to provide two candidates for each board seat.

     We will vote on a case-by case basis on these issues:

       o    Separate chairman and CEO positions. We will consider voting with
            shareholders on these issues in cases of poor corporate
            performance.

     Elections of Directors
     In uncontested elections of directors we will vote against:

       o    Individual directors with absenteeism above 25% without valid
            reason. We support proposals that require disclosure of director
            attendance.

       o    Insider directors and affiliated outsiders who sit on the audit,
            compensation, stock option or nominating committees. For the
            purposes of our policy, we accept the definition of affiliated
            directors provided by our proxy voting service.

     We will also vote against:

       o    Directors who have failed to act on a takeover offer where the
            majority of shareholders have tendered their shares.

       o    Directors who appear to lack independence or are associated with
            very poor corporate performance.

                                       8


     We will vote on a case-by case basis on these issues:

       o    Re-election of directors who have implemented or renewed a
            dead-hand or modified dead-hand poison pill (a "dead-hand poison
            pill" is a shareholder rights plan that may be altered only by
            incumbent or "dead " directors. These plans prevent a potential
            acquirer from disabling a poison pill by obtaining control of the
            board through a proxy vote).

       o    Contested election of directors.

       o    Prior to phase-in required by SEC, we would consider supporting
            election of a majority of independent directors in cases of poor
            performance.

       o    Mandatory retirement policies.

       o    Directors who have ignored a shareholder proposal that has been
            approved by shareholders for two consecutive years.

     Takeover-Related Measures
     Pioneer is generally opposed to proposals that may discourage takeover
     attempts. We believe that the potential for a takeover helps ensure that
     corporate performance remains high.

     Pioneer will vote for:

       o    Cumulative voting.

       o    Increase ability for shareholders to call special meetings.

       o    Increase ability for shareholders to act by written consent.

       o    Restrictions on the ability to make greenmail payments.

       o    Submitting rights plans to shareholder vote.

       o    Rescinding shareholder rights plans ("poison pills").

       o    Opting out of the following state takeover statutes:

     o Control share acquisition statutes, which deny large holders voting
       rights on holdings over a specified threshold.

     o Control share cash-out provisions, which require large holders to
       acquire shares from other holders.

     o Freeze-out provisions, which impose a waiting period on large
       holders before they can attempt to gain control.

     o Stakeholder laws, which permit directors to consider interests of
       non-shareholder constituencies.

                                       9


     o Disgorgement provisions, which require acquirers to disgorge profits
       on purchases made before gaining control.

     o Fair price provisions.

     o Authorization of shareholder rights plans.

     o Labor protection provisions.

     o Mandatory classified boards.

     We will vote on a case-by-case basis on the following issues:

       o    Fair price provisions. We will vote against provisions requiring
            supermajority votes to approve takeovers. We will also consider
            voting against proposals that require a supermajority vote to
            repeal or amend the provision. Finally, we will consider the
            mechanism used to determine the fair price; we are generally
            opposed to complicated formulas or requirements to pay a premium.

       o    Opting out of state takeover statutes regarding fair price
            provisions. We will use the criteria used for fair price
            provisions in general to determine our vote on this issue.

       o    Proposals that allow shareholders to nominate directors.

     We will vote against:

       o    Classified boards, except in the case of closed-end mutual funds.

       o    Limiting shareholder ability to remove or appoint directors. We
            will support proposals to restore shareholder authority in this
            area. We will review on a case-by-case basis proposals that
            authorize the board to make interim appointments.

       o    Classes of shares with unequal voting rights.

       o    Supermajority vote requirements.

       o    Severance packages ("golden" and "tin" parachutes). We will support
            proposals to put these packages to shareholder vote.

       o    Reimbursement of dissident proxy solicitation expenses. While we
            ordinarily support measures that encourage takeover bids, we
            believe that management should have full control over corporate
            funds.

       o    Extension of advance notice requirements for shareholder proposals.

       o    Granting board authority normally retained by shareholders (e.g.,
            amend charter, set board size).

       o    Shareholder rights plans ("poison pills"). These plans generally
            allow shareholders to buy additional shares at a below-market
            price in the event of a change in control and may deter some bids.

                                       10


     Capital Structure
     Managements need considerable flexibility in determining the company's
     financial structure, and Pioneer normally supports managements' proposals
     in this area. We will, however, reject proposals that impose high barriers
     to potential takeovers.

     Pioneer will vote for:

       o    Changes in par value.

       o    Reverse splits, if accompanied by a reduction in number of shares.

       o    Share repurchase programs, if all shareholders may participate on
            equal terms.

       o    Bond issuance.

       o    Increases in "ordinary" preferred stock.

       o    Proposals to have blank-check common stock placements (other than
            shares issued in the normal course of business) submitted for
            shareholder approval.

       o    Cancellation of company treasury shares.

     We will vote on a case-by-case basis on the following issues:

       o    Reverse splits not accompanied by a reduction in number of shares,
            considering the risk of delisting.

       o    Increase in authorized common stock. We will make a determination
            considering, among other factors:

     o Number of shares currently available for issuance;

     o Size of requested increase (we would normally approve increases of up to
       100% of current authorization);

     o Proposed use of the additional shares; and

     o Potential consequences of a failure to increase the number of shares
       outstanding (e.g., delisting or bankruptcy).

       o    Blank-check preferred. We will normally oppose issuance of a new
            class of blank-check preferred, but may approve an increase in a
            class already outstanding if the company has demonstrated that it
            uses this flexibility appropriately.

       o    Proposals to submit private placements to shareholder vote.

       o    Other financing plans.

     We will vote against preemptive rights that we believe limit a company's
financing flexibility.

                                      11


     Compensation
     Pioneer supports compensation plans that link pay to shareholder returns
     and believes that management has the best understanding of the level of
     compensation needed to attract and retain qualified people. At the same
     time, stock-related compensation plans have a significant economic impact
     and a direct effect on the balance sheet. Therefore, while we do not want
     to micromanage a company's compensation programs, we will place limits on
     the potential dilution these plans may impose.

     Pioneer will vote for:

       o    401(k) benefit plans.

       o    Employee stock ownership plans (ESOPs), as long as shares
            allocated to ESOPs are less than 5% of outstanding shares. Larger
            blocks of stock in ESOPs can serve as a takeover defense. We will
            support proposals to submit ESOPs to shareholder vote.

       o    Various issues related to the Omnibus Budget and Reconciliation Act
            of 1993 (OBRA), including:

     o Amendments to performance plans to conform with OBRA;

     o Caps on annual grants or amendments of administrative features;

     o Adding performance goals; and

     o Cash or cash-and-stock bonus plans.

       o    Establish a process to link pay, including stock-option grants, to
            performance, leaving specifics of implementation to the company.

       o    Require that option repricings be submitted to shareholders.

       o    Require the expensing of stock-option awards.

       o    Require reporting of executive retirement benefits (deferred
            compensation, split-dollar life insurance, SERPs, and pension
            benefits).

       o    Employee stock purchase plans where the purchase price is equal to
            at least 85% of the market price, where the offering period is no
            greater than 27 months and where potential dilution (as defined
            below) is no greater than 10%.

                                       12


     We will vote on a case-by-case basis on the following issues:

       o    Executive and director stock-related compensation plans. We will
            consider the following factors when reviewing these plans:

       o    The program must be of a reasonable size. We will approve plans
            where the combined employee and director plans together would
            generate less than 15% dilution. We will reject plans with 15% or
            more potential dilution.

            Dilution = (A + B + C) / (A + B + C + D), where

            A = Shares reserved for plan/amendment,

            B = Shares available under continuing plans,

            C = Shares granted but unexercised and

            D = Shares outstanding.

       o    The plan must not:

            o   Explicitly permit unlimited option repricing authority or that
                have repriced in the past without shareholder approval.

            o   Be a self-replenishing "evergreen" plan, plans that grant
                discount options and tax offset payments.

     o We are generally in favor of proposals that increase participation beyond
       executives.

     o We generally support proposals asking companies to adopt rigorous
       vesting provisions for stock option plans such as those that vest
       incrementally over, at least, a three- or four-year period with a pro
       rata portion of the shares becoming exercisable on an annual basis
       following grant date.

     o We generally support proposals asking companies to disclose their
       window period policies for stock transactions. Window period policies
       ensure that employees do not exercise options based on insider
       information contemporaneous with quarterly earnings releases and other
       material corporate announcements.

     o We generally support proposals asking companies to adopt stock holding
       periods for their executives.

       o    All other employee stock purchase plans.

       o    All other compensation-related proposals, including deferred
            compensation plans, employment agreements, loan guarantee programs
            and retirement plans.

       o    All other proposals regarding stock compensation plans, including
            extending the life of a plan, changing vesting restrictions,
            repricing options, lengthening exercise periods or accelerating
            distribution of awards and pyramiding and cashless exercise
            programs.

                                       13


     We will vote against:

       o    Pensions for non-employee directors. We believe these retirement
            plans reduce director objectivity.

       o    Elimination of stock option plans.

     We will vote on a case-by case basis on these issues:

       o    Limits on executive and director pay.

       o    Stock in lieu of cash compensation for directors.

     Corporate Governance
     Pioneer will vote for:

       o    Confidential Voting.

       o    Equal access provisions, which allow shareholders to contribute
            their opinion to proxy materials.

       o    Proposals requiring directors to disclose their ownership of shares
            in the company.

     We will vote on a case-by-case basis on the following issues:

       o    Change in the state of incorporation. We will support
            reincorporations supported by valid business reasons. We will
            oppose those that appear to be solely for the purpose of
            strengthening takeover defenses.

       o    Bundled proposals. We will evaluate the overall impact of the
            proposal.

       o    Adopting or amending the charter, bylaws or articles of association.

       o    Shareholder appraisal rights, which allow shareholders to demand
            judicial review of an acquisition price.

     We will vote against:

       o    Shareholder advisory committees. While management should solicit
            shareholder input, we prefer to leave the method of doing so to
            management's discretion.

       o    Limitations on stock ownership or voting rights.

       o    Reduction in share ownership disclosure guidelines.

                                       14


     Mergers and Restructurings
     Pioneer will vote on the following and similar issues on a case-by-case
     basis:

       o    Mergers and acquisitions.

       o    Corporate restructurings, including spin-offs, liquidations, asset
            sales, joint ventures, conversions to holding company and
            conversions to self-managed REIT structure.

       o    Debt restructurings.

       o    Conversion of securities.

       o    Issuance of shares to facilitate a merger.

       o    Private placements, warrants, convertible debentures.

       o    Proposals requiring management to inform shareholders of merger
            opportunities.

     We will normally vote against shareholder proposals requiring that the
     company be put up for sale.

     Mutual Funds
     Many of our portfolios may invest in shares of closed-end mutual funds or
     exchange-traded funds. The non-corporate structure of these investments
     raises several unique proxy voting issues.

     Pioneer will vote for:

       o    Establishment of new classes or series of shares.

       o    Establishment of a master-feeder structure.

     Pioneer will vote on a case-by-case on:

       o    Changes in investment policy. We will normally support changes
            that do not affect the investment objective or overall risk level
            of the fund. We will examine more fundamental changes on a
            case-by-case basis.

       o    Approval of new or amended advisory contracts.

       o    Changes from closed-end to open-end format.

       o    Authorization for, or increase in, preferred shares.

       o    Disposition of assets, termination, liquidation, or mergers.

       o    Classified boards of closed-end mutual funds, but will typically
            support such proposals.

                                       15


     Social Issues
     Pioneer will abstain on stockholder proposals calling for greater
     disclosure of corporate activities with regard to social issues. "Social
     Issues" may generally be described as shareholder proposals for a company
     to:

       o    Conduct studies regarding certain issues of public concern and
            interest;

       o    Study the feasibility of the company taking certain actions with
            regard to such issues; or

       o    Take specific action, including ceasing certain behavior and
            adopting company standards and principles, in relation to issues
            of public concern and interest.

     We believe these issues are important and should receive management
     attention.

     Pioneer will vote against proposals calling for substantial changes in the
     company's business or activities. We will also normally vote against
     proposals with regard to contributions, believing that management should
     control the routine disbursement of funds.

                                       16

Item 8. Portfolio Managers of Closed-End Management Investment
        Companies.
 
(a) If the registrant is a closed-end management investment company that
is filing an annual report on this Form N-CSR,provide the following 
information: 
(1) State the name, title, and length of service of the person or persons 
employed by or associated with the registrant or an investment adviser 
of the registrant who are primarily responsible for the day-to-day management
of the registrants portfolio (Portfolio Manager). Also state each Portfolio
Managers business experience during the past 5 years. 


	
 

Item 9. Purchases of Equity Securities by Closed-End Management 
Investment Company and Affiliated Purchasers. 

(a) If the registrant is a closed-end management investment company, 
in the following tabular format, provide the information specified in
paragraph (b) of this Item with respect to any purchase made by or on
behalf of the registrant or any affiliated purchaser, as defined in
Rule 10b-18(a)(3) under the Exchange Act (17 CFR 240.10b-18(a)(3)), of 
shares or other units of any class of the registrants equity securities 
that is registered by the registrant pursuant to Section 12 of the 
Exchange Act (15 U.S.C. 781). Instruction to paragraph (a). Disclose 
all purchases covered by this Item, including purchases that do not
satisfy the conditions of the safe harbor of Rule 10b-18 under the 
Exchange Act (17 CFR 240.10b-18), made in the period covered by the 
report. Provide disclosures covering repurchases made on a monthly basis.
For example, if the reporting period began on January 16 and ended on 
July 15, the chart would show repurchases for the months from January 16
through February 15, February 16 through March 15, March 16 through 
April 15, April 16 through May 15, May 16 through June 15, and June 16
through July 15. 


During the period covered by this report, there were no purchases
made by or on behalf of the registrant or any affiliated purchaser
as defined in Rule 10b-18(a)(3) under the Securities Exchange Act 
of 1934 (the Exchange Act), of shares of the registrants equity
securities that are registered by the registrant pursuant to 
Section 12 of the Exchange Act.




Item 10. Submission of Matters to a Vote of Security Holders.
 
Describe any material changes to the procedures by which shareholders
may recommend nominees to the registrants board of directors, where
those changes were implemented after the registrant last provided
disclosure in response to the requirements of Item 7(d)(2)(ii)(G)
of Schedule 14A (17 CFR 240.14a-101), or this Item. 


There have been no material changes to the procedures by which the 
shareholders may recommend nominees to the registrants board of 
directors since the registrant last provided disclosure in response
to the requirements of Item 7(d)(2)(ii)(G) of Schedule 14(A) in 
its definitive proxy statement, or this Item.


ITEM 11. CONTROLS AND PROCEDURES.

(a) Disclose the conclusions of the registrant's principal executive officer or
officers and principal financial officer or officers, or persons performing
similar functions, about the effectiveness of the registrant's disclosure
controls and procedures (as defined in Rule 30a-2(c) under the Act (17 CFR
270.30a-2(c))) based on their evaluation of these controls and procedures as of
a date within 90 days of the filing date of the report that includes the
disclosure required by this paragraph.

The registrant's principal executive officer and principal financial 
officer have concluded, that the registrant's disclosure controls and 
procedures are effective based on their evaluation of these controls and 
procedures as of a date within 90 days of the filing date of this report.


(b) Disclose whether or not there were significant changes in the registrant's
internal controls or in other factors that could significantly affect these
controls subsequent to the date of their evaluation, including any corrective
actions with regard to significant deficiencies and material weaknesses.

There were no significant changes in the registrant's internal controls or 
in other factors that could significantly affect these controls subsequent to 
the date of their evaluation, including any corrective actions with regard 
to significant deficiencies and material weaknesses.


ITEM 12. EXHIBITS.

File the exhibits listed below as part of this Form. Letter or number the
exhibits in the sequence indicated.

(a) Any code of ethics, or amendment thereto, that is the subject of the
disclosure required by Item 2, to the extent that the registrant intends to
satisfy the Item 2 requirements through filing of an exhibit.



(b) A separate certification for each principal executive officer and principal
financial officer of the registrant as required by Rule 30a-2 under the Act
(17 CFR 270.30a-2).

Filed herewith.





                                   SIGNATURES

                          [See General Instruction F]


Pursuant to the requirements of the Securities Exchange Act of 1934 and the
Investment Company Act of 1940, the registrant has duly caused this report to be
signed on its behalf by the undersigned, thereunto duly authorized.


(Registrant) Pioneer Municipal High Income Trust


By (Signature and Title)* /s/ John F. Cogan, Jr.
John F. Cogan, Jr, President

Date  December 29, 2005


Pursuant to the requirements of the Securities Exchange Act of 1934 and the
Investment Company Act of 1940, this report has been signed below by the
following persons on behalf of the registrant and in the capacities and on the
dates indicated.


By (Signature and Title)* /s/ John F. Cogan, Jr.
John F. Cogan, Jr., President

Date December 29, 2005


By (Signature and Title)* /s/ Vincent Nave
Vincent Nave, Treasurer

Date December 29, 2005

* Print the name and title of each signing officer under his or her signature.