SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a)
of the Securities Exchange Act of 1934

Filed by the Registrant [X]

Filed by a Party other than the Registrant [ ]

Check the appropriate box:

[ ] Preliminary Proxy Statement

[ ] Confidential, for Use of the Commission Only (as permitted
by Rule 14a-6(e)(2))

[X] Definitive Proxy Statement

[X] Definitive Additional Materials

[ ] Soliciting Material under Rule 14a-12

Pioneer High Income Trust
Pioneer Municipal High Income Trust
Pioneer Municipal High Income Advantage Trsut
(Name of Registrant as Specified in its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

[X] No fee required

PIONEER HIGH INCOME TRUST
PIONEER MUNICIPAL HIGH INCOME TRUST
PIONEER MUNICIPAL HIGH INCOME ADVANTAGE TRUST
60 State Street
Boston, Massachusetts 02109
1-800-622-3265

NOTICE OF ANNUAL MEETING OF SHAREHOLDERS

SCHEDULED FOR November 10, 2004

This is the formal agenda for your fund's annual shareholder meeting. It
tells you the matters you will be asked to vote on and the time and place of the
meeting, in case you want to attend in person.

To the shareholders of Pioneer High Income Trust, Pioneer Municipal High Income
Trust and Pioneer Municipal High Income Advantage Trust:

The annual meeting of shareholders of each of the above registered
investment management companies (collectively, the "funds") will be held at the
offices of Wilmer Cutler Pickering Hale and Dorr LLP, 60 State Street, 26th
Floor, Boston, Massachusetts on November 10, 2004 at 2:00 p.m., Boston time, to
consider the following:

1. To elect three Trustees of your fund, as named in the attached proxy
statement, two by the holders of Common and Preferred Shares of your
fund, voting together as a single class, and one by holders of
Preferred Shares of your fund, voting as a separate class. Each
elected Trustee will serve for a three year term or until a successor
is elected.

2. To consider any other business that may properly come before the
meeting.

Each fund will hold a separate meeting. Shareholders of each fund will vote
separately.

YOUR TRUSTEES RECOMMEND THAT YOU VOTE IN FAVOR OF PROPOSAL NO 1.
Shareholders of record as of the close of business on September 17, 2004
are entitled to vote at the meeting and any related follow-up meetings.

By Order of each Board of Trustees,

Dorothy E. Bourassa, Secretary

Boston, Massachusetts
October 4, 2004

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

WHETHER OR NOT YOU EXPECT TO ATTEND THE MEETING, PLEASE COMPLETE AND RETURN THE
ENCLOSED PROXY.
16386-00-0904

PROXY STATEMENT OF
PIONEER HIGH INCOME TRUST
PIONEER MUNICIPAL HIGH INCOME TRUST
PIONEER MUNICIPAL HIGH INCOME ADVANTAGE TRUST
60 State Street
Boston, Massachusetts 02109
1-800-622-3265

ANNUAL MEETING OF SHAREHOLDERS

This proxy statement contains the information you should know before voting
on the proposal summarized below.

Each fund will furnish without charge a copy of its most recent annual
report and any more recent semiannual report to any shareholder upon request.
Shareholders who want to obtain a copy of a fund's reports should direct all
written requests to the attention of the fund, at the address listed above, or
should call Pioneer Investment Management Shareholder Services at
1-800-622-3265.

INTRODUCTION

This proxy statement is being used by the Board of Trustees of each fund to
solicit proxies to be voted at the annual meeting of shareholders of each of the
funds referenced above. Participating in the meeting are holders of common
shares of beneficial interest (the "Common Shares") and the holders of preferred
shares of beneficial interest (the "Preferred Shares") of each fund. The Common
Shares and the Preferred Shares of each fund sometimes are referred to herein
collectively as the "Shares." Each meeting will be held at the offices of Wilmer
Cutler Pickering Hale and Dorr LLP, 60 State Street, 26th Floor, Boston,
Massachusetts 02109, at 2:00 p.m., Boston time, on November 10, 2004, and at any
adjournments of a meeting to a later date, for the purposes as set forth in the
accompanying notice of annual meeting of shareholders.

This proxy statement and the enclosed proxy card are being mailed to
shareholders of each fund on or about October 4, 2004. The annual report for
each fund for its most recently completed fiscal year was previously mailed to
shareholders.

WHO IS ELIGIBLE TO VOTE

Shareholders of record of each fund as of the close of business on
September 17, 2004 (the "record date") are entitled to vote on all of the fund's
business at the annual shareholder meeting and any adjournments thereof. The
affirmative vote of a plurality of the Common and Preferred Shares of each fund
present at the meeting in person or by proxy, voting together as a single class,
is required to elect each nominee for Trustee designated to be elected by the
Common and Preferred Shares of each fund. The affirmative vote of a plurality of
the Preferred Shares of each fund present at the meeting in person or by proxy
is required to elect each nominee for Trustee designated to be elected

by the Preferred Shares of each fund. Election by plurality means those persons
who receive the highest number of votes cast "FOR" up to the total number of
persons to be elected as trustees at the Meeting shall be elected. Shares
represented by properly executed proxies, unless revoked before or at the
meeting, will be voted according to the shareholder's instructions. If you sign
a proxy but do not fill in a vote, your shares will be voted in favor of each of
the nominees for trustee. If any other business comes before the annual
shareholder meeting, your shares will be voted at the discretion of the persons
named as proxies.

Each fund will vote separately on each item. Votes of multiple funds will
not be aggregated.

PROPOSAL 1

ELECTION OF BOARD OF TRUSTEES

Shareholders of each fund are being asked to consider the election of three
nominees to the Board of Trustees of each fund. Each Trustee shall be elected to
hold office for a three year term or until his or her successor is elected and
qualified. Each nominee has consented to being named in this proxy statement and
indicated his or her willingness to serve if elected. Dr. Richard Egdahl, who is
a nominee for Trustee, is expected to retire as a Trustee during 2005. In the
unanticipated event that any nominee should be unable to serve, the persons
named as proxies may vote for such other person as shall be designated by the
fund's Board of Trustees. The persons named on the accompanying proxy card
intend to vote at the meeting (unless otherwise directed) for the election of
the nominees named below as trustees of each fund.

The Declaration of Trust for each fund provides that the Board of Trustees
shall consist of trustees divided into three classes, the classes to be as
nearly equal in number as possible. The trustees of only one class are elected
at each annual meeting so that the regular term of only one class of trustees
will expire annually and any particular trustee stands for election only once in
each three year period. Each fund's Board of Trustees is divided into three
staggered term classes - Class I, Class I and Class III. Class I trustees are
being submitted to shareholders for election at the Meeting for Pioneer
Municipal High Income Trust and Pioneer Municipal High Income Advantage Trust.
Class II trustees are being submitted to shareholders for election at the
Meeting for Pioneer High Income Trust.

Each fund's Board of Trustees consists of eight members.

Pioneer High Income Trust
The terms of the Class I trustees - Ms. Bush and Ms. Piret - will expire in
2006; the terms of the Class II trustees - Mr. Cogan, Dr. Egdahl and Mr. West -
expire at the upcoming 2004 annual meeting, and the terms of the Class III
trustees - Ms. Graham, Mr. Hood and Mr. Winthrop - expire at the third annual
meeting in 2005. Subsequently, each class of trustees will stand for election at
the conclusion of its respective three year term. Such classification may
prevent replacement of a majority of the trustees for up to a two-year period.
Mr. Cogan and Ms. Piret have been designated as the Trustees to be elected by
the holders of the Preferred Shares of the fund.

Pioneer Municipal High Income Trust and
Pioneer Municipal High Income Advantage Trust
The terms of the Class I trustees for Pioneer Municipal High Income Trust
and Pioneer Municipal High Income Advantage Trust - Mr. Cogan, Dr. Egdahl and
Mr. West - expire at the first annual meeting following the initial public
offering of the common shares (the upcoming meeting); the terms of the Class II
trustees - Ms. Graham, Mr. Hood and Mr. Winthrop - expire at the second annual
meeting, and the terms of the Class III trustees - Ms. Bush and Ms. Piret -
expire at the third annual meeting. Subsequently, each class of trustees will
stand for election at the conclusion of its respective three year term. Such
classification may prevent replacement of a majority of the trustees for up to a
two-year period. Mr. Cogan and Ms. Piret have been designated as the Trustees to
be elected by the holders of the Preferred Shares of each fund.

The following table sets forth the incumbent trustees and each trustee's
position(s) with each fund, his or her age, address, principal occupation and
employment during the past five years and any other directorship held. Trustees
who are interested persons of a fund within the meaning of the Investment
Company Act of 1940 (the "1940 Act") are referred to as Interested Trustees.
Trustees who are not interested persons of a fund are referred to as Independent
Trustees. Each of the trustees serves as a trustee of each of the 65 U.S.
registered investment portfolios for which Pioneer Investment Management, Inc.
("Pioneer") serves as investment adviser (the "Pioneer Funds"). The address of
all Interested Trustees is 60 State Street, Boston, MA 02109.

Term of Office Other
Name, Age, Position(s) and Length of Principal Occupation(s) Directorships Held
Held With the Fund and Address Service During Past Five Years by this Trustee
- -------------------------------- ------------------------ ------------------------------- -------------------

Interested Trustees: High Income Trust: Deputy Chairman and a Director of
John F. Cogan, Jr. Class II Trustee Director of Pioneer Global Harbor Global
(78)* since 2002. Term Asset Management S.p.A. Company, Ltd.
Chairman of the Board, expires in 2004. ("PGAM"); Non-Executive
Trustee and President Elected by Preferred Chairman and a Director of
Shares only. Pioneer Investment Manage-
Municipal High ment USA Inc. ("PIM-USA");
Income Trust: Class Chairman and a Director of
I Trustee since 2003. Pioneer; Director of Pioneer
Term expires in Alternative Investment Man-
2004. Elected by agement Limited (Dublin);
Preferred Shares President and a Director of
only. Pioneer Alternative Invest-
Municipal High ment Management (Ber-
Income Advantage muda) Limited and affiliated
Trust: Class I Trustee funds; President and Director
since 2003. Term of Pioneer Funds Distributor,
expires in 2004. Inc.; President of all of the
Elected by Preferred Pioneer Funds; and Of Coun-
Shares only. sel (since 2000, partner prior
to 2000), Wilmer Cutler
Pickering Hale and Dorr LLP
(counsel to PIM-USA and
the Pioneer Funds)

Term of Office Other
Name, Age, Position(s) and Length of Principal Occupation(s) Directorships Held
Held With the Fund and Address Service During Past Five Years by this Trustee
- -------------------------------- ----------------------- -------------------------------- ---------------------

Osbert M. Hood High Income Trust: President and Chief Execu- None
(52)* Class III Trustee tive Officer, PIM-USA since
Trustee and Executive since June 2003. May, 2003 (Director since
Vice President Term expires in January, 2001); President
2005. and Director of Pioneer
Municipal High Investment Management,
Income Trust: Class Inc. since May, 2003; Chair-
II Trustee since man and Director of Pioneer
2003. Term expires Investment Management
in 2005. Shareholder Services, Inc.
Municipal High ("PIMSS") since May, 2003;
Income Advantage Executive Vice President of
Trust: Class II all of the Pioneer Funds
Trustee since 2003. since June 3, 2003; Execu-
Term expires in tive Vice President and Chief
2005. Operating Officer of PIM-
USA, November 2000 - May
2003; Executive Vice Presi-
dent, Chief Financial Officer
and Treasurer, John Hancock
Advisers, LLC, Boston, MA,
November 1999 - November
2000; Senior Vice President
and Chief Financial Officer,
John Hancock Advisers, LLC,
April 1997 - November 1999
Independent Trustees:
Mary K. Bush High Income Trust: President, Bush International Director of Brady
(56) Class I Trustee since (international financial advi- Corporation
Trustee 2002. Term expires sory firm) (industrial
3509 Woodbine Street, in 2006. identification and
Chevy Chase, MD 20815 Municipal High specialty coated
Income Trust: Class material products
III Trustee since manufacturer),
2003. Term expires Millenium
in 2006. Chemicals, Inc.
Municipal High (commodity
Income Advantage chemicals),
Trust: Class III Mortgage
Trustee since 2003. Guaranty
Term expires in Insurance
2006. Corporation, R.J.
Reynolds
Tobacco
Holdings, Inc.
(tobacco)

Richard H. Egdahl, M.D. High Income Trust: Alexander Graham Bell None
(77) Class II Trustee Professor of Health Care
Trustee since 2002. Term Entrepreneurship, Boston
Boston University Healthcare expires in 2004. University; Professor of
Entrepreneurship Program, 53 Municipal High Management, Boston Univer-
Bay State Road, Income Trust: Class sity School of Management;
Boston, MA 02215 I Trustee since 2003. Professor of Public Health,
Term expires in Boston University School of
2004. Public Health; Professor of
Municipal High Surgery, Boston University
Income Advantage School of Medicine; and
Trust: Class I Trustee University Professor, Boston
since 2003. Term University
expires in 2004.

Margaret B.W. Graham High Income Trust: Founding Director, The None
(57) Class III Trustee Winthrop Group, Inc.
Trustee since 2002. Term (consulting firm); Professor
1001 Sherbrooke Street West, expires in 2005. of Management, Faculty
Montreal, Quebec, Canada Municipal High of Management, McGill
Income Trust: Class University
II Trustee since
2003. Term expires
in 2005.
Municipal High
Income Advantage
Trust: Class II
Trustee since 2003.
Term expires in
2005.

Term of Office Other
Name, Age, Position(s) and Length of Principal Occupation(s) Directorships Held
Held With the Fund and Address Service During Past Five Years by this Trustee
- -------------------------------- ----------------------- ------------------------------- -------------------

Marguerite A. Piret High Income Trust: President and Chief Execu- None
(56) Class I Trustee since tive Officer, Newbury, Piret &
Trustee 2002. Term expires Company, Inc. (investment
One Boston Place, 28th Floor, in 2006. Elected by banking firm)
Boston, MA 02108 Preferred Shares
only.
Municipal High
Income Trust: Class
III Trustee since
2003. Term expires
in 2006. Elected by
Preferred Shares
only.
Municipal High
Income Advantage
Trust: Class III
Trustee since 2003.
Term expires in
2006. Elected by
Preferred Shares
only.

Stephen K. West High Income Trust: Senior Counsel, Sullivan & Director, The
(75) Class II Trustee Cromwell (law firm) Swiss Helvetia
Trustee since 2002. Term Fund, Inc.
125 Broad Street, expires in 2004. (closed-end
New York, NY 10004 Municipal High investment
Income Trust: Class company) and
I Trustee since 2003. AMVESCAP PLC
Term expires in (investment
2004. managers)
Municipal High
Income Advantage
Trust: Class I Trustee
since 2003. Term
expires in 2004.

Term of Office Other
Name, Age, Position(s) and Length of Principal Occupation(s) Directorships Held
Held With the Fund and Address Service During Past Five Years by this Trustee
- -------------------------------- -------------------- ------------------------------ -------------------

John Winthrop High Income Trust: President, John Winthrop & None
(68) Class III Trustee Co., Inc. (private investment
Trustee since 2002. Term firm)
One North Adgers Wharf, expires in 2005.
Charleston, SC 29401 Municipal High
Income Trust: Class
II Trustee since
2003. Term expires
in 2005.
Municipal High
Income Advantage
Trust: Class II
Trustee since 2003.
Term expires in
2005.

- -------------
* Mr. Cogan and Mr. Hood are Interested Trustees because each is an officer or
director of the fund's investment adviser and certain of its affiliates.

Board Committees
The Board of Trustees for each fund has an Audit Committee, an Independent
Trustees Committee, a Nominating Committee, a Valuation Committee and a Policy
Administration Committee. Committee members are as follows:

Audit
Marguerite A. Piret (Chair), Margaret B. W. Graham and John Winthrop

Independent Trustees
Mary K. Bush, Richard H. Egdahl, Margaret B.W. Graham (Chair), Marguerite
A. Piret, Stephen K. West and John Winthrop

Nominating
Mary K. Bush, Richard H. Egdahl (Chair) and Marguerite A. Piret

Valuation
Stephen K. West, Marguerite A. Piret (Chair) and John Winthrop

Policy Administration
Mary K. Bush (Chair), Richard H. Egdahl and Margaret B.W. Graham

During the most recent fiscal year, the Audit, Nominating, Valuation,
Independent Trustees and Policy Administration Committees of Pioneer High Income
Trust held 11, 1, 4, 9 and 6 meetings, respectively.

During the most recent fiscal year, the Audit, Nominating, Valuation,
Independent Trustees and Policy Administration Committees of Pioneer Municipal
High Income Trust held 11, 1, 4, 9 and 6 meetings, respectively.

During the most recent fiscal year, the Audit, Nominating, Valuation,
Independent Trustees and Policy Administration Committees of Pioneer Municipal
High Income Advantage Trust held 8, 1, 3, 6 and 5 meetings, respectively.

All members of the Audit Committee are "independent", as defined in the
applicable listing standard of the New York Stock Exchange currently in effect.
The Board of Trustees has adopted a charter for the Audit Committee, in effect
as of June 8, 2004 which is attached as Appendix A to this proxy statement. In
accordance with its charter, the purposes of the Audit Committee are to:

o Assist the Board of Trustee's oversight of (1) the integrity of the Pioneer
Funds' financial statements, (2) the Pioneer Funds' compliance with legal and
regulatory requirements that relate to the funds' accounting and financial
reporting, internal financial controls and independent audit (except to the
extent such responsibility is delegated to another committee of the Board of
Trustees), (3) the independent auditor's qualifications and independence, and
(4) the performance of the Pioneer Funds' internal audit function and
independent accountants; and

o Prepare an Audit Committee Report to the extent required by the Securities
and Exchange Commission ("SEC") to be included in a Pioneer Funds' annual
proxy statement or other filing.

The Audit Committee reports that it has (1) reviewed and discussed each
fund's audited financial statements with management; (2) discussed with the
independent auditors the matters relating to the quality of each fund's
financial reporting; and (3) received written disclosures and an independence
letter from the independent public accountants and discussed with the
independent accountants that firm's independence. Based upon the review and
discussions referred to above, the Audit Committee recommended to the Board of
Trustees that the audited financial statements be included in the Annual Reports
for Pioneer High Income Trust and Pioneer Municipal High Income Advantage Trust
for the fiscal year ended March 31, 2004 and the Annual Report for Pioneer
Municipal High Income Trust for the fiscal year ended April 30, 2004, for filing
with the SEC.

All members of the Nominating Committee are independent under the New York
Stock Exchange's Revised Listing Rules and are not interested persons, as
defined in the 1940 Act, of Pioneer. The Board of each fund has adopted a
written charter for the Nominating Committee, which is attached as Appendix B to
this proxy statement. The Nominating Committee reviews the qualifications of
persons being considered as candidates as trustees and makes recommendations
regarding the qualifications of such persons to the Independent Trustees. All of
the Independent Trustees then evaluate any candidate and determine whether to
nominate them for election. The Trustees who are not Independent Trustees and
the officers of each Fund are nominated and selected by the Board.

The Nominating Committee's charter provides for certain criteria to be used
in evaluating candidates for Independent Trustee. In reviewing a potential
nominee and in evaluating the re-nomination of current Independent Trustees, the
Nominating Committee applies the following criteria: (i) the nominee's
reputation for integrity, honesty and adherence to high ethical standards, (ii)
the nominee's business acumen and ability to exercise sound judgments, (iii) a
commitment to attend and participate in meetings of the Board and its
committees, (iv) the ability to understand potential conflicts of interest in
managing a Fund and to act in the interests of all shareholders, and (v) the
absence of a real or apparent conflict of interest that would impair the
nominee's ability to represent the interests of all the shareholders and to
fulfill the responsibilities of an Independent Trustee. The Nominating Committee
does not necessarily place the same emphasis on each criteria and each nominee
may not have each of these qualities.

As long as an existing Independent Trustee continues, in the opinion of the
other Independent Trustees, to satisfy these criteria and continues to make
positive contributions to the Board, each fund anticipates that Independent
Trustees of each fund would favor the re-nomination of an existing Trustee
rather than a new candidate. Consequently, while the Nominating Committee will
evaluate the qualifications of nominees recommended by shareholders to serve as
trustee, the Independent Trustees may only act upon the Nominating Committee's
evaluation if there is a vacancy on the Board. In the event that a vacancy
arises or a change in Board membership is determined to be advisable, the
Nominating Committee will, in addition to any shareholder recommendations,
evaluate candidates identified by other means, including candidates proposed by
Independent Trustees or management. While it has not done so in the past, the
Nominating Committee may retain a consultant to assist the Committee in a search
for a qualified candidate.

Any shareholder recommendation must be submitted in compliance with all of
the pertinent provisions of Rule 14a-8 under the Securities Exchange Act of 1934
to be considered by the Nominating Committee. In evaluating a nominee
recommended by a shareholder, the Nominating Committee, in addition to the
criteria discussed above, may consider the objectives of the shareholder in
submitting that nomination and whether such objectives are consistent with the
interests of all shareholders. If the Board determines to include a
shareholder's candidate among the slate of nominees, the candidate's name will
be placed on the fund's proxy card. If the Nominating Committee, the Independent
Trustees or the Board determines not to include such candidate among the Board's
designated nominees and the shareholder has satisfied the requirements of Rule
14a-8, the shareholder's candidate will be treated as a nominee of the
shareholder who originally nominated the candidate.

The Nominating Committee initiated the recommendation of each of the
nominees to serve as Independent Trustee.

Shareholders may communicate with the members of the Board as a group or
individually. Any such communication should be sent to the Board or an
individual Trustee c/o the Secretary of the fund at the address on the notice of
this meeting. The Secretary may determine not to forward any letter to members
of the Board that does not relate to the business of a fund.

The Valuation Committee reviews the valuation assigned to certain
securities by Pioneer in accordance with each fund's valuation procedures.

The Policy Administration Committee reviews the implementation of certain
of each fund's administrative policies and procedures.

The Independent Trustees Committee reviews each fund's management contract
and other related party contracts annually and is also responsible for any other
action required to be taken, under the 1940 Act, by the Independent Trustees
acting alone.

Each fund's Declaration of Trust provides that the fund will indemnify the
trustees and officers against liabilities and expenses reasonably incurred in
connection with any litigation in which they may be involved because of their
offices with the fund, unless it is determined in the manner specified in the
Declaration of Trust that they have not acted in good faith in the reasonable
belief that their actions were in the best interests of the fund or that such
indemnification would relieve any officer or Trustee of any liability to the
fund or its shareholders by reason of willful misfeasance, bad faith, gross
negligence or reckless disregard of his or her duties.

During the fiscal year ended March 31, 2004, the Board of Trustees of
Pioneer High Income Trust and Pioneer Municipal High Income Advantage Trust held
14 and 8 meetings, respectively. During the fiscal year ended April 30, 2004,
the Board of Trustees of Pioneer Municipal High Income Trust held 14 meetings.
Each Trustee attended at least 75% of such meetings. All of the current trustees
and committee members of Pioneer High Income Trust and Pioneer Municipal High
Income Advantage Trust then serving attended at least 75% of the meetings of the
Board of Trustees and applicable committees, if any, held during the fiscal year
ended March 31, 2004. All of the current trustees and committee members of
Pioneer Municipal High Income Trust then serving attended at least 75% of the
meetings of the Board of Trustees and applicable committees, if any, held during
the fiscal year ended April 30, 2004.

The following table indicates the value of shares that each Trustee
beneficially owned in each fund and Pioneer Funds in the aggregate as of August
31, 2004. Beneficial ownership is determined in accordance with SEC rules. The
share value of any closed-end Pioneer fund is based on its closing market price
on August 31, 2004. The share value of any open-end Pioneer fund is based on the
net asset value of the class of shares on August 31, 2004. The dollar ranges in
this table are in accordance with SEC requirements.

Aggregate Dollar Range
of Equity Securities in
All Pioneer Funds
Dollar Range of Overseen or to be
Equity Securities Overseen by Trustee
Name of Trustee or Nominee in each Fund or Nominee
- ------------------------------- --------------------- ------------------------

INTERESTED TRUSTEE or
NOMINEE
John F. Cogan ................. Over $100,000* Over $100,000
None**
None***

Osbert M. Hood ................ None Over $100,000

INDEPENDENT TRUSTEE or
NOMINEE
Mary K. Bush .................. None* $10,001-$50,000
None**
None***

Richard H. Egdahl ............. None* $10,001-$50,000
None**
None***

Margaret B. W. Graham ......... $1-$10,000* $10,001-$50,000
None**
None***

Marguerite A. Piret ........... $10,001-$50,000* $10,001-$50,000
None**
None***

Stephen K. West ............... $1-$10,000* Over $100,000
None**
None***

John Winthrop ................. $1-$10,000* Over $100,000
$1-$10,000**
$1-$10,000***

- -------------
* Shares held in Pioneer High Income Trust
** Shares held in Pioneer Municipal High Income Trust
*** Shares held in Pioneer Municipal High Income Advantage Trust

During the most recent fiscal year ending March 31, 2004, none of the
trustees or any nominee for election as a trustee of Pioneer High Income Trust
or Pioneer Municipal High Income Advantage Trust engaged in the purchase or sale
of securities of Pioneer, UniCredito Italiano or any other entity in a control
relationship to Pioneer or Pioneer Funds Distributor, Inc. ("PFD").

During the most recent fiscal year ending April 30, 2004, none of the
trustees or any nominee for election as a trustee of Pioneer Municipal High
Income Trust engaged in the purchase or sale of securities of Pioneer,
UniCredito Italiano or any other entity in a control relationship to Pioneer or
PFD.

Material Relationships of the Independent Trustees

For purposes of the statements below:

o the immediate family members of any person are their spouse, children in the
person's household (including step and adoptive children) and any dependent
of the person.

o an entity in a control relationship means any person who controls, is
controlled by or is under common control with the named person. For example,
UniCredito Italiano is an entity that is in a control relationship with
Pioneer.

o a related fund is a registered investment company or an entity exempt from
the definition of an investment company pursuant to Sections 3(c)(1) or
3(c)(7) of the 1940 Act, for which Pioneer or any of its affiliates act as
investment adviser or for which PFD or any of its affiliates act as principal
underwriter. For example, each fund's related funds include all of the
Pioneer Funds and any non-U.S. funds managed by Pioneer or its affiliates.

As of December 31, 2003, for each fund, none of the Independent Trustees,
nor any of their immediate family members, beneficially owned any securities
issued by Pioneer, UniCredito Italiano or any other entity in a control
relationship to Pioneer or PFD.

During the past five years, for each fund, none of the Independent
Trustees, nor any of their immediate family members, had any direct or indirect
interest (the value of which exceeded $60,000), whether by contract, arrangement
or otherwise, in Pioneer, UniCredito Italiano, or any other entity in a control
relationship to Pioneer or PFD.

During the past five years, for each fund, none of the Independent
Trustees, nor any of their immediate family members, had an interest in a
transaction or a series of transactions, or in any currently proposed
transaction, or series of similar transactions, in which the aggregate amount
involved exceeded $60,000 and to which any of the following were a party (each a
"fund related party"):

o the fund

o an officer of the fund

o a related fund

o an officer of any related fund

o Pioneer or PFD

o an officer of Pioneer or PFD

o any affiliate of Pioneer or PFD

o an officer of any such affiliate

During the calendar years 2002 and 2003, for each fund, none of the
Independent Trustees, nor any of their immediate family members, had any
relationship (the value of which exceeded $60,000) with any fund related party,
including, but not limited to, relationships arising out of (i) the payment for
property and services, (ii) the provision of legal services, (iii) the provision
of investment banking services (other than as a

member of the underwriting syndicate) or (iv) the provision of consulting
services, except that Mr. West, an Independent Trustee, is Senior Counsel to
Sullivan & Cromwell and acts as counsel to the Independent Trustees and the
Independent Trustees of the other Pioneer Funds. The aggregate compensation paid
to Sullivan & Cromwell by the funds and the other Pioneer Funds was
approximately $53,000 and $126,603 in 2002 and 2003, respectively.

During the calendar years 2002 and 2003, for each fund, none of the
Independent Trustees, nor any of their immediate family members, served as a
member of a board of directors on which an officer of any of the following
entities also serves as a director:

o Pioneer

o PFD

o UniCredito Italiano

o any other entity in a control relationship with Pioneer or PFD

None of the funds' Trustees or officers has any arrangement with any other
person pursuant to which that Trustee or officer serves on the Board of
Trustees. During the calendar years 2002 and 2003, for each fund, none of the
Independent Trustees, nor any of their immediate family members, had any
position, including as an officer, employee, director or partner, with any of
the following:

o the fund

o any related fund

o Pioneer

o PFD

o any affiliated person of the fund, Pioneer or PFD

o UniCredito Italiano

o any other entity in a control relationship to the fund, Pioneer or PFD

Compliance with Section 16(a) Reporting Requirements
Section 16(a) of the Exchange Act requires each fund's executive officers,
Trustees and person who own more than ten percent of a fund's shares ("10%
Shareholders") to file reports of ownership and changes in ownership with the
SEC. Executive officers, Trustees and 10% Shareholders are required by SEC
regulations to furnish the fund with copies of all Section 16(a) forms they
file. Based solely on a review of the copies of these reports furnished to each
of the funds and representations that no other reports were required to be
filed, each fund believes that during the past fiscal year its executive
officers, trustees and 10% Shareholders complied with all applicable Section
16(a) filing requirements.

Other executive officers
In addition to Mr. Cogan and Mr. Hood, who serve as President and Executive
Vice President, respectively, of each fund, the following table provides
information with respect to the other executive officers of the funds. Each
executive officer is elected by the Board

of Trustees and serves until his or her successor is chosen and qualified or
until his or her resignation or removal by the Board. The business address of
all officers of the funds is 60 State Street, Boston, Massachusetts 02109.

Name, age and position with each fund Principal occupation(s)
- ------------------------------------- --------------------------------------------------

Dorothy E. Bourassa (56) Secretary of PIM-USA; Senior Vice President -
Secretary Legal of Pioneer; and Secretary/Clerk of most of
PIM-USA's subsidiaries since October 2000;
Secretary of all of the Pioneer Funds since
September 8, 2003 (Assistant Secretary from
November 2000 to September 2003); Senior
Counsel, Assistant Vice President and Director of
Compliance of PIM-USA from April 1998 through
October 2000.

Vincent Nave (59) Vice President - Fund Accounting, Administration
Treasurer and Custody Services of Pioneer (Manager from
September 1996 to February 1999); and Treasurer
of all of the Pioneer mutual funds (Assistant
Treasurer from June 1999 to November 2000).

Katherine Kim Sullivan (30) Fund Administration Manager - Fund Accounting,
Assistant Treasurer Administration and Custody Services since June
2003; Assistant Vice President - Mutual Fund
Operations of State Street Corporation from June
2002 to June 2003 (formerly Deutsche Bank
Asset Management); Pioneer Fund Accounting,
Administration and Custody Services (Fund
Accounting Manager from August 1999 to May
2002, Fund Accounting Supervisor from 1997 to
July 1999). Assistant Treasurer of all of the
Pioneer Funds since September 8, 2003.

Luis I. Presutti (39) Assistant Vice President - Fund Accounting,
Assistant Treasurer Administration and Custody Services of Pioneer
(Fund Accounting Manager from 1994 to 1999);
and Assistant Treasurer of all of the Pioneer
Funds since November 2000.

Gary Sullivan (46) Fund Accounting Manager - Fund Accounting,
Assistant Treasurer Administration and Custody Services of Pioneer;
and Assistant Treasurer of all of the Pioneer
Funds since May 2002.

Name, age and position with each fund Principal occupation(s)
- ------------------------------------- --------------------------------------------------

Christopher J. Kelley (39) Assistant Vice President and Senior Counsel of
Assistant Secretary Pioneer since July 2002; Vice President and
Senior Counsel of BISYS Fund Services, Inc.
(April 2001 to June 2002); Senior Vice President
and Deputy General Counsel of Funds Distributor,
Inc. (July 2000 to April 2001; Vice President and
Associate General Counsel from July 1996 to July
2000). Assistant Secretary of all of the Pioneer
Funds since September 8, 2003.

David C. Phelan (47) Partner, Wilmer Cutler Pickering Hale and Dorr
Assistant Secretary LLP. Assistant Secretary of all of the Pioneer
Funds since September 8, 2003.

Compensation of trustees and officers
The following table sets forth certain information with respect to the
compensation of each Trustee of Pioneer High Income Trust and Pioneer Municipal
High Income Advantage Trust for the fiscal year ended March 31, 2004. The
amounts paid to the Trustees differ due to (i) membership on or chairing certain
committees of the boards of Trustees and (ii) attendance at meetings. Each fund
does not pay any salary or other compensation to its officers.

Pioneer High Income Trust and Pioneer Municipal High Income Advantage Trust:

Pension or Retirement Total Compensation
Aggregate Benefits Accrued as from the Fund and
Compensation Part of Fund Other Pioneer
Name of Trustee from Fund Expenses Funds++
- ----------------------------------------------------------------------------------------------

Interested Trustees:
John F. Cogan, Jr.+ ............. $ 500* $0.00 $ 19,200.00
$ 500**

Osbert M. Hood+ ................. $ 300* $0.00 $ 11,520.00
$ 300**
Independent Trustees:
Mary K. Bush .................... $ 1,787.48* 0.00 $104,000.00
$ 1,019.56**

Richard H. Egdahl, M.D. ......... $ 1,739.66* 0.00 $ 99,750.00
$ 1,002.96**

Margaret B.W. Graham ............ $ 1,787.47* 0.00 $104,000.00
$ 1,019.56**

Marguerite A. Piret ............. $ 1,883.15* 0.00 $112,500.00
$ 1,052.81**

Stephen K. West ................. $ 1,739.66* 0.00 $ 99,750.00
$ 1,002.95**

John Winthrop ................... $ 1,739.66* 0.00 $ 99,750.00
$ 1,002.95** ----- -----------

Total ........................... $11,477.08* $0.00 $650,470.00
$ 6900.79** ===== ============

- -------------
+ Under the management contract, Pioneer reimburses each fund for any
Interested Trustees fees paid by the fund.
++ There are 65 U.S. registered investment portfolios in the Pioneer Family of
Funds.
* Aggregate compensation from Pioneer High Income Trust
** Aggregate compensation from Pioneer Municipal High Income Advantage Trust

Pioneer Municipal High Income Trust:
The following table sets forth certain information with respect to the
compensation of each Trustee of Pioneer Municipal High Income Trust for the
fiscal year ended April 30, 2004. The amounts paid to the Trustees differ due to
(i) membership on or chairing certain committees of the boards of Trustees and
(ii) attendance at meetings. The fund does not pay any salary or other
compensation to its officers.

Interested Trustees:
John F. Cogan, Jr.+ ............. $ 500 $ 0.00 $ 19,200.00
Osbert M. Hood+ ................. $ 300 $ 0.00 $ 11,520.00

Independent Trustees:
Mary K. Bush .................... $ 715.88 0.00 $104,000.00
Richard H. Egdahl, M.D. ......... $ 702.49 0.00 $ 99,750.00
Margaret B.W. Graham ............ $ 715.88 0.00 $104,000.00
Marguerite A. Piret ............. $ 742.71 0.00 $112,500.00
Stephen K. West ................. $ 704.47 0.00 $ 99,750.00
John Winthrop ................... $ 702.47 0.00 $ 99,750.00
--------- ------- -----------
Total ........................... $5,083.90 $ 0.00 $650,470.00
========= ======= ===========

- -------------
+ Under the management contract, Pioneer reimburses the fund for any Interested
Trustees fees paid by the fund.
++ There are 65 U.S. registered investment portfolios in the Pioneer Family of
Funds.

Investment adviser and administrator
Pioneer, whose executive offices are located at 60 State Street, Boston,
Massachusetts 02109, serves as investment adviser and administrator to each
fund.

The Trustees may, but all of the Trustees generally do not, attend
shareholder meetings. No trustees attended Pioneer High Income Trust's 2003
annual shareholder meeting.

Required vote
In accordance with each fund's agreement and declaration of trust, the
holders of Common Shares and Preferred Shares of each fund will vote on the
respective nominees designated to be elected by such class of shares. Mr. Cogan,
Dr. Egdahl and Mr. West are the current nominees for election for each fund (Dr.
Egdahl and Mr. West by the holders

of Common and Preferred Shares and Mr. Cogan by the holders of Preferred Shares
only). The affirmative vote of a plurality of the Common and Preferred Shares
for each fund present at the meeting in person or by proxy, voting together as a
single class, is required to elect such nominee for Trustee designated to be
elected by the Common and Preferred Shares and, where applicable, the
affirmative vote of a plurality of the Preferred Shares of each fund present at
the meeting in person or by proxy is required to elect each nominee for Trustee
designated to be elected by the Preferred Shares. This means that the three
nominees receiving the greatest number of votes will be elected as Class I
Trustees to the Board of Pioneer Municipal High Income Trust and Pioneer
Municipal High Income Advantage Trust and as Class II Trustees to the Board of
Pioneer High Income Trust.

Recommendation
For the reasons set forth above, the trustees of your fund unanimously
recommend that shareholders vote in favor of each of the nominees.

AUDITOR INFORMATION

Audit fees
The aggregate fees billed for professional services rendered by Ernst &
Young LLP for its audit of each fund's annual financial statements and fees
related to consents and comfort letters for the two most recent fiscal years
contained in the annual reports filed by the fund for such years were as
follows:

For the fiscal year For the fiscal year
ended 3/31/2003 ended 3/31/2004
- ------------------------------------------------------------------------------------------------------

Pioneer High Income Trust ............................. $69,500 $44,500
Pioneer Municipal High Income Advantage Trust ......... n/a $59,000

For the fiscal year For the fiscal year
ended 4/30/2003 ended 4/30/2004
- ------------------------------------------------------------------------------------------------------

Pioneer Municipal High Income Trust ................... n/a $59,000

Audit-related fees
The following are aggregate fees billed for assurance and related services
by Ernst & Young LLP to each fund that are related to the review of each fund's
semi annual financial statements and agreed upon procedures related to the
ratings of each fund's Preferred Shares for the two most recent fiscal years.
All of these services were approved by the audit committee pursuant to
Regulation S-X.

For the fiscal year For the fiscal year
ended 3/31/2003 ended 3/31/2004
- ------------------------------------------------------------------------------------------------------

Pioneer High Income Trust ............................. $20,000 $20,113
Pioneer Municipal High Income Advantage Trust ......... n/a $12,500

For the fiscal year For the fiscal year
ended 4/30/2003 ended 4/30/2004
- ------------------------------------------------------------------------------------------------------

Pioneer Municipal High Income Trust ......... n/a $22,500

Tax fees
The aggregate fees billed for professional services, primarily for tax
returns, rendered by Ernst & Young LLP for tax compliance, tax advice and tax
planning to each fund for the two most recent fiscal years were as follows. All
of these services were approved by the audit committee pursuant to Regulation
S-X.

For the fiscal year For the fiscal year
ended 3/31/2003 ended 3/31/2004
- ------------------------------------------------------------------------------------------------------

Pioneer High Income Trust ............................. $3,000 $3,600
Pioneer Municipal High Income Advantage Trust ......... n/a $3,600

For the fiscal year For the fiscal year
ended 4/30/2003 ended 4/30/2004
- ------------------------------------------------------------------------------------------------------

Pioneer Municipal High Income Trust ......... n/a $3,600

All other fees
There were no fees billed for other services rendered by Ernst & Young LLP
to the funds, each fund's investment adviser and any entity controlling,
controlled by, or under common control with the adviser that provides ongoing
services to the funds (hereinafter referred to as "affiliates" of each fund),
other than the fees described above, during the two most recent fiscal years.

General Audit Committee Approval Policy

o For all projects, the officers of the funds and the funds' 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 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.

Aggregate Non-Audit Fees
The aggregate non-audit fees for each fund and its affiliates as previously
defined, were as follows. These fees include services provided prior to May 6,
2003, the effective date of the pre-approval process.

For the fiscal year For the fiscal year
ended 3/31/2003 ended 3/31/2004
- ------------------------------------------------------------------------------------------------------

Pioneer High Income Trust ............................. $42,300 $25,100
Pioneer Municipal High Income Advantage Trust ......... $10,000 $20,100

For the fiscal year For the fiscal year
ended 4/30/2003 ended 4/30/2004
- ------------------------------------------------------------------------------------------------------

Pioneer Municipal High Income Trust ......... n/a $26,100

The Audit Committee of the Board of each fund has considered whether the
provision of services, other than audit services, by Ernst & Young LLP to each
fund and its affiliates is compatible with maintaining Ernst & Young LLP's
independence in performing audit services.

Representatives of Ernst & Young LLP will be available at the shareholder
meeting (either in person or via telephone), will have the opportunity to make a
statement should they desire to do so, and will be available to answer
questions.

INFORMATION CONCERNING THE MEETING

Outstanding shares and quorum
As of the record date, the following common and preferred shares of
beneficial interest were outstanding for each fund:

Common shares Preferred shares
- --------------------------------------------------------------------------------------

Pioneer High Income Trust .......... 26,787,499.000 2,020 (Series M)
2,020 (Series W)
2,000 (Series TH)

Pioneer Municipal High Income 3,000 (Series A)
Advantage Trust .................. 22,618,832.000 3,000 (Series B)

Pioneer Municipal High Income 2,000 (Series A)
Trust ............................ 22,120,893.000 2,040 (Series B)

Only shareholders of record as of the record date are entitled to notice of
and to vote at the meeting. The holders of one-third of the outstanding shares
of each series or class of each fund or one third of the outstanding shares of
each fund, entitled to vote in person or by proxy, shall be a quorum for the
transaction of business with respect to such class or classes for each fund,
respectively.

Ownership of shares of the funds
To the knowledge of each fund, as of the record date, the following persons
owned of record or beneficially 5% or more of a class of the outstanding shares
of each fund:

Pioneer High Income Trust:

Record Holder Share Class Number of Shares % of Class
- -----------------------------------------------------------------------------------

Cede & Co. Common 26,726,060.00 99.77
Box 20
Bowling Green Station
New York, NY 10004
- -----------------------------------------------------------------------------------
Citigroup Global Markets, Inc. Series M 136 6.73
333 W. 34th Street
New York, NY 10001
- -----------------------------------------------------------------------------------
Series W 101 5.00
- -----------------------------------------------------------------------------------
Merrill Lynch Pierce Fenner and
Smith, Inc. Series M 588 29.11
101 Hudson Street, 9th Floor
Jersey City, NJ 07302
- -----------------------------------------------------------------------------------

Record Holder Share Class Number of Shares % of Class
- ------------------------------------------------------------------------------------

Series W 560 27.72
- ------------------------------------------------------------------------------------
Series TH 562 28.10
- ------------------------------------------------------------------------------------
Pershing LLC Securities
Corporation Series M 500 24.75
1 Pershing Plaza
Jersey City, NJ 07399
- ------------------------------------------------------------------------------------
Series W 184 9.11
- ------------------------------------------------------------------------------------
Series TH 405 20.25
- ------------------------------------------------------------------------------------
UBS Financial Services, Inc. Series M 676 33.47
1200 Harbor Blvd.
Weehawken, NJ 07086
- ------------------------------------------------------------------------------------
Series W 284 14.06
- ------------------------------------------------------------------------------------
Series TH 119 5.95
- ------------------------------------------------------------------------------------
Bank of New York Series W 427 21.14
One Wall Street
New York, NY 10288
- ------------------------------------------------------------------------------------
Series TH 188 9.40
- ------------------------------------------------------------------------------------
Mellon Trust of New England
National Association Series W 200 9.90
525 William Penn Place,
Suite 3418
Pittsburgh, PA 15259
- ------------------------------------------------------------------------------------
Morgan Stanley & Co.
Incorporated Series TH 200 10.00
One Pierrepont Plaza, 7th Floor
Brooklyn, NY 11201
- ------------------------------------------------------------------------------------
National Financial Services LLC Series TH 172 8.60
200 Liberty Street
New York, NY 10281
- ------------------------------------------------------------------------------------
Oppenheimer & Co., Inc. Series TH 144 7.20
125 Broad Street, 15th Floor
New York, NY 10004
- ------------------------------------------------------------------------------------
State Street Bank and Trust
Company Series TH 190 9.50
1776 Heritage Drive
Quincy, MA 02171
- ------------------------------------------------------------------------------------

Pioneer Municipal High Income Trust:

Record Holder Share Class Number of Shares % of Class
- --------------------------------------------------------------------------------

Cede & Co. Common 22,013,906.00 99.52
Box 20
Bowling Green Station
New York, NY 10004
- --------------------------------------------------------------------------------

Record Holder Share Class Number of Shares % of Class
- -----------------------------------------------------------------------------------

Merrill Lynch Pierce Fenner and
Smith, Inc. Series A 676 33.80
101 Hudson Street, 9th Floor
Jersey City, NJ 07302
- -----------------------------------------------------------------------------------
Series B 249 12.21
- -----------------------------------------------------------------------------------
UBS Financial Services, Inc. Series A 1,182 59.10
1200 Harbor Blvd.
Weehawken, NJ 07086
- -----------------------------------------------------------------------------------
Series B 1,303 63.87
- -----------------------------------------------------------------------------------
Oppenheimer & Co., Inc. Series B 140 6.86
125 Broad Street, 15th Floor
New York, NY 10004
- -----------------------------------------------------------------------------------
First Clearing, LLC Series B 121 5.93
901 E. Byrd Street
Richmond, VA 23219
- -----------------------------------------------------------------------------------

Pioneer Municipal High Income Advantage Trust:

Record Holder Share Class Number of Shares % of Class
- -----------------------------------------------------------------------------------

Cede & Co. Common 22,543,753.00 99.67
Box 20
Bowling Green Station
New York, NY 10004
- -----------------------------------------------------------------------------------
Merrill Lynch Pierce Fenner and
Smith, Inc. Series A 214 7.13
101 Hudson Street, 9th Floor
Jersey City, NJ 07302
- -----------------------------------------------------------------------------------
UBS Financial Services, Inc. Series A 2,400 80.00
1200 Harbor Blvd.
Weehawken, NJ 07086
- -----------------------------------------------------------------------------------
Series B 2,233 74.43
- -----------------------------------------------------------------------------------
National Financial Services LLC Series A 223 7.43
200 Liberty Street
New York, NY 10281
- -----------------------------------------------------------------------------------
Series B 197 6.57
- -----------------------------------------------------------------------------------
First Clearing, LLC Series B 191 6.37
901 E. Byrd Street
Richmond, VA 23219
- -----------------------------------------------------------------------------------

Shareholder proposals
If you wish to include a proposal in your fund's proxy statement for the
2005 annual meeting, your proposal must be received by the Secretary of the fund
at the fund's principal offices at 60 State Street, Boston Massachusetts 02109
on or before July 5, 2005. A proposal that is not to be included in the fund's
proxy statement may only be made at the 2005 annual meeting if it is received by
the Secretary of the fund at the fund's principal offices at 60 State Street,
Boston Massachusetts 02109 not more than 120 days and at

least 90 days before the anniversary date of the mailing of the fund's proxy
materials for this year's annual meeting provided, however, that in the event
that the date of the mailing of the notice for the 2005 annual meeting is
advanced or delayed by more than thirty (30) days from the anniversary date of
the mailing of the notice for this year's annual meeting, notice by a
shareholder to be timely must be so delivered not earlier than the close of
business on the 120th day prior to the date of mailing of the notice for the
2005 annual meeting and not later than the close of business on the later of the
90th day prior to the date of mailing of the notice for the 2005 annual meeting
or the 10th day following the day on which public announcement of the date of
mailing of the notice for the 2005 meeting is first made by the fund.

The submission by a shareholder of a proposal for inclusion in a proxy
statement does not guarantee that it will be included. Each fund currently
expects to hold the next annual shareholders' meeting on or about September 27,
2005, which date is subject to change. Shareholder proposals are subject to
certain regulations under the federal securities laws.

Proxies, quorum and voting at the meeting
Any shareholder who has given his or her proxy to someone has the power to
revoke that proxy at any time prior to its exercise by executing a superseding
proxy or by submitting a notice of revocation to the secretary of the fund. In
addition, although mere attendance at the meeting will not revoke a proxy, a
shareholder present at the meeting may withdraw his or her proxy and vote in
person. All properly executed and unrevoked proxies received in time for the
meeting will be voted in accordance with the instructions contained in the
proxies. If no instruction is given, the persons named as proxies will vote the
shares represented thereby in favor of the nominees in Proposal No. 1, as
described above, and will use their best judgment in connection with the
transaction of such other business as may properly come before the meeting or
any adjournment thereof.

For each fund, one-third of the outstanding shares of each series or class,
or one-third of the outstanding shares of the Trust, entitled to vote, present
in person or represented by proxy, constitutes a quorum for the transaction of
business at the meeting with respect to such series or class, or with respect to
the entire fund, respectively. In the event that at the time any session of the
meeting is called to order a quorum is not present in person or by proxy, the
persons named as proxies may vote those proxies that have been received to
adjourn the shareholder meeting to a later date. In the event that a quorum is
present but sufficient votes in favor of the proposal have not been received,
the persons named as proxies may propose one or more adjournments of the
shareholder meeting to permit further solicitation of proxies with respect to
such proposal. Any such adjournment will require the affirmative vote of more
than one half of the shares of the fund present in person or by proxy at the
session of the meeting to be adjourned. The persons named as proxies will vote
those proxies which they are entitled to vote in favor of any such proposal in
favor of such an adjournment and will vote those proxies required to be voted
against any such proposal against any such adjournment. A shareholder vote may
be taken on one or more of the proposals in the proxy statement prior to such
adjournment if sufficient votes for its approval have been received and it is
otherwise

appropriate. Such vote will be considered final regardless of whether the
meeting is adjourned to permit additional solicitation with respect to any other
proposal.

Shares of the fund represented in person or by proxy, including shares that
abstain or do not vote with respect to a proposal, will be counted for purposes
of determining whether there is a quorum at the meeting. Similarly, if a broker
or nominee holding shares in "street name" indicates on the proxy card that it
does not have discretionary authority to vote on a proposal and has not received
instructions from the beneficial owner, those shares will not be considered
present and entitled to vote on that proposal. Thus, a "broker non-vote" has no
effect on the voting.

Other business
While the meeting has been called to transact any business that may
properly come before it, the only matters that the trustees intend to present
are those matters stated in the attached notice of annual meeting of
shareholders. However, if any additional matters properly come before the
meeting, and on all matters incidental to the conduct of the meeting, it is the
intention of the persons named in the enclosed proxy to vote the proxy in
accordance with their judgment on such matters unless instructed to the
contrary.

Method of solicitation and expenses
The cost of preparing, assembling and mailing this proxy statement and the
attached notice of annual meeting of shareholders and the accompanying proxy
card for each fund will be borne by that fund. In addition to soliciting proxies
by mail, Pioneer may, at the fund's expense, have one or more of the fund's
officers, representatives or compensated third-party agents, including Pioneer,
PIMSS and PFD, aid in the solicitation of proxies by personal interview or
telephone and telegraph and may request brokerage houses and other custodians,
nominees and fiduciaries to forward proxy soliciting material to the beneficial
owners of the shares held of record by such persons.

Each fund may also arrange to have votes recorded by telephone, the
internet or other electronic means. The voting procedures used in connection
with such voting methods are designed to authenticate shareholders' identities,
to allow shareholders to authorize the voting of their shares in accordance with
their instructions and to confirm that their instructions have been properly
recorded. If these procedures were subject to a successful legal challenge, such
votes would not be counted at the shareholder meeting. Each fund is unaware of
any such challenge at this time. In the case of telephone voting, shareholders
would be called at the phone number the sub-transfer agent, Mellon Investor
Services LLC, has in its records for their accounts, and would be asked for
their Social Security number or other identifying information. The shareholders
would then be given an opportunity to authorize proxies to vote their shares at
the meeting in accordance with their instructions. In the case of automated
telephone and internet voting, shareholders would be required to provide their
Social Security number or other identifying information and would receive a
confirmation of their instructions.

Persons holding shares as nominees will be reimbursed by Pioneer, upon
request, for the reasonable expenses of mailing soliciting materials to the
principals of the accounts.

October 4, 2004)

Appendix A--Audit Committee Charter (as of June 8, 2004)

This Audit Committee Charter is applicable to each of the Pioneer Funds
that are listed on the New York Stock Exchange ("NYSE").

Italicized terms used in this Charter are defined in Annex A.

Membership. The Audit Committee shall be composed exclusively of Trustees
("Independent Trustees") who are not "interested persons" as defined in the
Investment Company Act of 1940, as amended, of Pioneer Investment Management,
Inc ("Pioneer"). The Audit Committee shall include at least three Independent
Trustees who are designated for membership from time to time by the Board of
Trustees. In selecting Independent Trustees to serve on the Audit Committee, the
Board of Trustees shall select members who are free of any relationship that, in
the opinion of the Board of Trustees, may interfere, or give the appearance of
interfering, with such member's individual exercise of independent judgment.
Unless otherwise determined by the Board, no member of the Audit Committee may
serve on the audit committee of more than two other public companies (other than
another Pioneer Fund). Except as otherwise permitted by the applicable rules of
the New York Stock Exchange, each member of the Audit Committee shall be
independent. Each member of the Audit Committee must be financially literate, as
such qualification is interpreted by the Board of Trustees in its business
judgment. At least one member of the Audit Committee shall be an Audit Committee
Financial Expert.

Function. The Audit Committee's purpose is to:

o assist the Board of Trustee's oversight of (1) the integrity of the
Pioneer Funds' financial statements, (2) the Pioneer Funds' compliance
with legal and regulatory requirements that relate to the Funds'
accounting and financial reporting, internal financial controls and
independent audit (except to the extent such responsibility is
delegated to another committee of the Board of Trustees), (3) the
independent auditor's qualifications and independence, and (4) the
performance of the Pioneer Funds' internal audit function and
independent accountants; and

o prepare an Audit Committee Report to the extent required by the
Securities and Exchange Commission ("SEC") to be included in a Pioneer
Funds' annual proxy statement or other filing.

The Audit Committee shall discharge its responsibilities, and shall access
the information provided by the Pioneer Funds' officers, Pioneer and independent
auditors, in accordance with its business judgment.

Oversight Role. Oversight is the primary role of the Audit Committee.
Pioneer (or in the case of certain Pioneer Funds, Princeton Administrators LLC)
is responsible for maintaining appropriate systems for accounting and internal
controls and preparing the Pioneer Funds' financial statements. The independent
auditors are responsible for auditing the Pioneer Funds' financial statements
and, to the extent directed by the Audit Committee, for reviewing the Pioneer
Funds' unaudited interim financial statements. The Audit Committee and the Board
of Trustees recognize that the Funds' officers, Pioneer and the independent
auditors have more experience, expertise, resources and time, and more

A-1

detailed knowledge and information regarding the Pioneer Funds' accounting,
auditing, internal control and financial reporting practices than the Audit
Committee does. Accordingly, the Audit Committee's oversight role is not
intended to provide any expert or special assurance as to the financial
statements and other financial information provided by a Pioneer Fund to its
shareholders and others. The authority and responsibilities set forth in this
Charter do not reflect or create any duty or obligation of the Audit Committee
to plan or conduct any audit, to determine or certify that any Pioneer Fund's
financial statements are complete, accurate, fairly presented, or in accordance
with generally accepted accounting principles or applicable law, or to guarantee
any independent auditor's report.

The independent auditors shall report directly to the Audit Committee, and
the Audit Committee shall be directly responsible for oversight of the work of
the independent auditors, including resolution of disagreements between any
Pioneer Fund's officer, Pioneer and the independent auditors regarding financial
reporting.

Specific Responsibilities. The specific responsibilities of the Audit
Committee are:

1. To act as a liaison between the Pioneer Funds' independent auditors
and the Board of Trustees of the Pioneer Funds.

2. To approve, and in addition recommend to the Board of Trustees for its
ratification and approval in accord with applicable law, the
selection, appointment, retention and compensation of an independent
auditor for each Pioneer Fund prior to the engagement of such
independent auditor. The Audit Committee should meet with the
independent auditor prior to the audit to discuss the planning and
staffing of the audit.

3. To meet with independent auditors, including private meetings, and, as
necessary, Pioneer's internal auditors and the Funds' officers (i) to
review the arrangements for and scope of the annual audit and any
special audits; (ii) to discuss the form and substance of the Pioneer
Funds' financial statements and reports, and any matters of concern
relating to the Pioneer Funds' financial statements, including any
adjustments to such statements recommended by the independent
accountants, or other results of an audit; (iii) to consider the
independent accountants' comments with respect to the Pioneer Funds'
financial policies, procedures and internal accounting controls and
management's responses thereto; (iv) to discuss the Funds' policies
with respect to risk assessment and risk management; (v) to review the
resolution of any disagreements between the independent auditors and
Pioneer regarding the Pioneer Funds' financial reporting; and (vi) to
review the form of opinion the independent accountants propose to
render to the Board of Trustees and shareholders.

4. Together with the Independent Trustees Committee, to review and assess
the renewal materials of all related party contracts and agreements,
including management advisory agreements, underwriting contracts,
administration agreements, distribution contracts, and transfer agency
contracts.

A-2

5. To monitor the independent auditor of each Pioneer Fund to attempt to
identify: conflicts of interest between the Pioneer Funds and the
independent auditor as a result of employment relationships; the
provision of prohibited non-audit services to a Pioneer Fund by its
independent auditor; violations of audit partner rotation
requirements; and prohibited independent auditor compensation
arrangements whereby individuals employed by the auditor are
compensated based on selling non-audit services to the fund. The
independent auditors should promptly contact the Audit Committee or
its Chair about any significant issue or disagreement concerning a
fund's accounting practices or financial statements that is not
resolved to their satisfaction or if Section 10A(b) of the Exchange
Act has been implicated.

6. To ensure that the independent auditors inform the Audit Committee on
a periodic basis of all relationships between the auditors and
Pioneer; to engage in a dialogue with the independent auditors with
respect to any disclosed relationships or services that may impact the
objectivity and independence of the independent auditors; and to
recommend that the Board of Trustees take appropriate action in
response to the independent auditors' report to satisfy itself of the
independent auditors' independence.

7. To pre-approve all audit and non-audit services provided to each
Pioneer Fund by its independent auditor, directly or pursuant to the
pre-approval polices attached hereto as Annex B. To pre-approve,
directly or pursuant to the pre-approval polices attached hereto as
Annex B, all non-audit services provided by the Pioneer Fund's
independent auditor to Pioneer and any entity controlling, controlled
by, or under common control with Pioneer that provides ongoing
services to a Pioneer Fund, if the engagement relates directly to the
operations and financial reporting of the Pioneer Fund. The Audit
Committee is authorized to further delegate, to the extent permitted
by law, pre-approval responsibilities to one or more members of the
Audit Committee who shall report to the Audit Committee regarding
approved services at the Audit Committee's next regularly scheduled
meeting.

8. With respect to any Pioneer Fund listed on the New York Stock
Exchange, to consider whether the Audit Committee will recommend to
the Board of Trustees that the audited financial statements be
included in the Fund's annual report. The Board of Trustees delegates
to the Audit Committee the authority to release the Funds' financial
statements for publication in the annual report, subject to the Board
of Trustees' right to review and ratify such financial statements
following publication. The Audit Committee shall prepare an annual
committee report for inclusion where necessary in the proxy statement
of a Fund relating to its annual meeting of security holders or in any
other filing required by the SEC's rules.

9. To obtain and review, at least annually, a report by the independent
auditor describing: the independent accounting firm's internal
quality-control procedures; any material issues raised by the most
recent internal quality-control review, or peer review, of the firm,
or by any inquiry or investigation by

A-3

governmental or professional authorities, within the preceding five
years, respecting one or more independent audits carried out by the
firm, and any steps taken to deal with any such issues; and, to assess
the auditor's independence, all relationships between the independent
auditor and each Fund, including the disclosures required by any
applicable Independence Standards Board Standard No. 1.

10. To review with the independent auditor any problems that may be
reported to the Audit Committee arising out of a Fund's accounting,
auditing or financial reporting functions and management's response,
and to receive and consider reports on critical accounting policies
and practices and alternative treatments discussed with management.

11. To investigate improprieties or suspected improprieties in the
operations of a Pioneer Fund. To establish and monitor, or cause to be
established and monitored, procedures for the receipt, retention, and
treatment of complaints received by a Pioneer Fund regarding
accounting, internal accounting controls, or auditing matters, and the
confidential, anonymous submission by employees of Pioneer, Princeton
Administrators LLC or any other provider of accounting related
services for a listed fund, as well as employees of the fund regarding
questionable accounting or auditing matters, as and when required by
applicable rules or listing requirements. The procedures currently in
effect are attached as Annex C.

12. To review with the Pioneer Funds' principal executive officer and/or
principal financial officer in connection with required certifications
on Form N-CSR any significant deficiencies in the design or operation
of internal control over financial reporting or material weaknesses
therein and any reported evidence or fraud involving management or
other employees who have a significant role in the Fund's internal
control over financial reporting.

13. To report regularly to the Board of Trustees, including the Audit
Committee's conclusions with respect to the independent auditor and
the funds' financial statements and accounting controls.

Governance. Members of the Audit Committee shall elect from among
themselves a Chair, who shall preside over meetings of the Audit Committee.
Replacements for vacancies, occurring from time to time, shall be nominated and
elected by the Board of Trustees. The Audit Committee shall meet on a regular
basis and is empowered to hold special meetings, as circumstances require.
Meetings of the Audit Committee shall be open to all members of the Board who
are Independent Trustees of the Funds; however, no member of the Board of
Trustees other than a member of the Audit Committee shall have the right to vote
on any matter brought before the Audit Committee. The Chair shall determine
whether Trustees who are affiliated with Pioneer, or members of the Funds'
management may be present at any meeting. The Audit Committee shall meet
regularly with the Treasurer of the Funds. The Audit Committee shall have the
resources and authority appropriate to discharge its responsibilities, including
the authority to retain special counsel and other experts or consultants at the
expense of the appropriate Funds.

A-4

The designation of a person as an Audit Committee Financial Expert within
the meaning of the rules under Section 407 of the Sarbanes-Oxley Act of 2002
shall not impose any greater responsibility or liability on that person than the
responsibility and liability imposed on such person as a member of the Audit
Committee, nor shall it decrease the duties and obligations of other Audit
Committee members or the Board of Trustees. The compensation of Audit Committee
members shall be as determined by the Independent Trustees. No member of the
Audit Committee may receive, directly or indirectly, any consulting, advisory or
other compensatory fee from a Pioneer Fund, other than fees paid in his or her
capacity as a member of the Board of Trustees or a committee of the Board.

Review. The Committee shall review this charter at least annually and shall
recommend such changes to the Board of Trustees, as it deems desirable. This
Charter may only be amended by the Board of Trustees. At least annually, the
Audit Committee shall evaluate its own performance, including whether the Audit
Committee is meeting frequently enough to discharge its responsibilities
appropriately.

A-5

PIONEER FUNDS

Appendix B--Nominating Committee Charter

Function. The key function of the Nominating Committee of the Boards of
Trustees of the Pioneer Funds (the "Funds") is to screen potential candidates
for Independent Trustees. In performing such function, the Nominating Committee
will:

o Periodically review the requisite skills and criteria for Independent
Trustees.

o Periodically review the requisite skills and criteria for the
re-nomination of a person currently serving as an Independent Trustee.

o Review the qualifications of any person nominated to serve on the
Board by a shareholder or recommended by any Trustee, management or
another person and to make a recommendation as to the qualifications
of such nominated or recommended person to the Independent Trustees
and the Board; and

o Periodically review and revise as it deems appropriate procedures
regarding Trustee candidates recommended by shareholders.

With respect to a vacancy on the Board, the Committee shall use the
criteria and the principles set forth on Annex A, as revised from time to time,
to guide its selection process. These criteria shall be applied when considering
a recommendation as to a vacancy whether the person has been recommended by a
shareholder, Trustee, management or otherwise.

With respect to the re-nomination of an existing Independent Trustee, the
Committee and the Independent Trustees Committee shall use the criteria and the
principles set forth on Annex A, as revised from time to time, to guide its
selection process.

The Nominating Committee performs these functions to assist the Board and
the Independent Trustees in carrying out their fiduciary responsibilities and
the requirements of the Investment Company Act of 1940 and the rules thereunder
with respect to the nomination of members of the Board. The primary function of
the Committee is to act as a consultative body to the Independent Trustees
Committee, which shall be responsible for determining whether to recommend the
nomination of any person to serve as Independent Trustee to the Board.
Nomination of any person to serve on the Board as an Independent Trustee shall
initially be acted upon by the Independent Trustees and then the entire Board.
Nominations of persons to serve as Trustees who are not Independent Trustees
shall be made by the Board.

Governance. The Committee shall be comprised of three Trustees who shall be
nominated and elect ed by the Board. Each member of the Committee must be
independent under the New York Stock Exchange's Revised Listing Rules and must
not be interested persons, as defined in the Investment Company Act of 1940, as
amended, of Pioneer Investment Management, Inc. Members of the Committee shall
elect from among themselves a Chairperson, who shall preside over meetings of
the Committee.

B-1

Replacements for vacancies, occurring from time to time, shall be nominated and
elected by the remaining Trustees of the Funds.

The Committee shall meet with such frequency as the members of the
Committee shall determine to be appropriate. Meetings of the Nominating
Committee shall be open to all Independent Trustees; however, no member of the
Board other than a member of the Committee shall have the right to vote on any
matter brought before the Committee. All actions by the Committee shall be taken
by a majority of the total number of members of the Committee, regardless of the
number of members of the Committee actually present at such meeting. Any action
permitted to be taken by the Committee may be taken by written action signed by
at least a majority of the members of the Committee.

The Committee shall have the authority to retain and terminate any search
firm to be used to identify or investigate the qualifications of Trustee
nominees, including authority to approve the search firm's fees and other
retention terms. The Committee is empowered, without further action by the
Board, to cause the Funds to pay the compensation of any search firm engaged by
the Committee.

The Committee shall, from time to time as it deems appropriate, review and
reassess the adequacy of this Charter, including Annex A, and recommend any
proposed changes to the Board for approval.

Approval of Charter. This Charter and any amendments are subject to
approval by the Board.

B-2

PROXY FOR THE ANNUAL MEETING OF SHAREHOLDERS OF
PIONEER HIGH INCOME TRUST
To be held November 10, 2004

I (we), the undersigned holders(s) of common shares of beneficial interest,
having received notice of the meeting and management's proxy statement therefor,
and revoking all prior proxies, hereby appoint John F. Cogan, Jr., Dorothy E.
Bourassa, Christopher J. Kelley and David C. Phelan, and each of them, my (our)
attorneys (with full power of substitution in them and each of them) for and in
my (our) name(s) to attend the Annual Meeting of Shareholders of my (our) fund
to be held on November 10, 2004, at 2:00 p.m. (Boston time) at the offices of
Wilmer Cutler Pickering Hale and Dorr LLP, counsel to the fund, 60 State Street,
26th Floor, Boston, Massachusetts 02109, and any adjourned session or sessions
thereof, and there to vote and act upon the following matters (as more fully
described in the accompanying proxy statement) in respect of all common shares
of beneficial interest of the fund which I (we) will be entitled to vote or act
upon, with all the powers I (we) would possess if personally present.

IN THEIR DISCRETION, THE PROXIES ARE AUTHORIZED TO VOTE UPON SUCH OTHER BUSINESS
AS MAY PROPERLY COME BEFORE THE MEETING. THE SHARES REPRESENTED BY THIS PROXY
WILL BE VOTED AS DIRECTED BY THE UNDERSIGNED.

999 9999 9999 999

NOTE: In signing, please write name(s)
exactly as appearing hereon. When
signing as attorney, executor,
administrator or other fiduciary, please
give your full title as such. Joint
owners should each sign personally.

_________________________________________
Signature

_________________________________________
Signature of joint owner, if any

_________________________________________
Date HIT 14536

PLEASE RETURN YOUR SIGNED PROXY CARD IN THE ENCLOSED ENVELOPE

THE COMMON SHARES OF BENEFICIAL INTEREST REPRESENTED BY THIS PROXY WILL BE VOTED
AS DIRECTED BY THE UNDERSIGNED.

IF NO DIRECTION IS GIVEN, THIS PROXY WILL BE VOTED FOR THE PROPOSAL.

THIS PROXY IS SOLICITED BY THE BOARD OF TRUSTEES OF YOUR FUND AND SHOULD BE
RETURNED AS SOON AS POSSIBLE IN THE ENVELOPE PROVIDED. THE BOARD RECOMMENDS THAT
YOU VOTE IN FAVOR OF THE FOLLOWING:

TO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK. EXAMPLE: [box]

1. To elect two Class II trustees of the FOR WITHHOLD FOR ALL
fund, as named in the attached proxy ALL ALL EXCEPT
statement, to serve on the Board of (as marked below)
Trustees until their successors have been
duly elected and qualified. The [box] [box] [box]
nominees for trustees are:

01. Dr. R.H. Egdahl 02. S.K. West

To withhold authority to vote for one or more of the nominees, write the name(s)
of the nominee(s) on the line below:

__________________________________________

PLEASE SIGN, DATE AND RETURN THIS PROXY CARD

HIT_14536

PROXY FOR THE ANNUAL MEETING OF SHAREHOLDERS OF
PIONEER HIGH INCOME TRUST
To be held November 10, 2004

I (we), the undersigned holders(s) of preferred shares of beneficial interest,
having received notice of the meeting and management's proxy statement therefor,
and revoking all prior proxies, hereby appoint John F. Cogan, Jr., Dorothy E.
Bourassa, Christopher J. Kelley and David C. Phelan, and each of them, my (our)
attorneys (with full power of substitution in them and each of them) for and in
my (our) name(s) to attend the Annual Meeting of Shareholders of my (our) fund
to be held on November 10, 2004, at 2:00 p.m. (Boston time) at the offices of
Wilmer Cutler Pickering Hale and Dorr LLP, counsel to the fund, 60 State Street,
26th Floor, Boston, Massachusetts 02109, and any adjourned session or sessions
thereof, and there to vote and act upon the following matters (as more fully
described in the accompanying proxy statement) in respect of all preferred
shares of beneficial interest of the fund which I (we) will be entitled to vote
or act upon, with all the powers I (we) would possess if personally present.

999 9999 9999 999

_________________________________________
Signature

_________________________________________
Signature of joint owner, if any

_________________________________________
Date HIT 14536

PLEASE RETURN YOUR SIGNED PROXY CARD IN THE ENCLOSED ENVELOPE

THE PREFERRED SHARES OF BENEFICIAL INTEREST REPRESENTED BY THIS PROXY WILL BE
VOTED AS DIRECTED BY THE UNDERSIGNED.

IF NO DIRECTION IS GIVEN, THIS PROXY WILL BE VOTED FOR THE PROPOSAL.

THIS PROXY IS SOLICITED BY THE BOARD OF TRUSTEES OF YOUR FUND AND SHOULD BE
RETURNED AS SOON AS POSSIBLE IN THE ENVELOPE PROVIDED. THE BOARD RECOMMENDS THAT
YOU VOTE IN FAVOR OF THE FOLLOWING:

TO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK. EXAMPLE: [box]

1. To elect three Class II trustees of the FOR WITHHOLD FOR ALL
fund, as named in the attached proxy ALL ALL EXCEPT
statement, to serve on the Board of (as marked below)
Trustees until their successors have been
duly elected and qualified. The [box] [box] [box]
nominees for trustees are:

01. Dr. R.H. Egdahl 02. S.K. West 03. J.F. Cogan, Jr.

To withhold authority to vote for one or more of the nominees, write the name(s)
of the nominee(s) on the line below:

__________________________________________

PLEASE SIGN, DATE AND RETURN THIS PROXY CARD

HIT_14536

PROXY FOR THE ANNUAL MEETING OF SHAREHOLDERS OF
PIONEER MUNICIPAL HIGH INCOME TRUST
To be held November 10, 2004

999 9999 9999 999

_________________________________________
Signature

_________________________________________
Signature of joint owner, if any

_________________________________________
Date MHI 14537

PLEASE RETURN YOUR SIGNED PROXY CARD IN THE ENCLOSED ENVELOPE

THE COMMON SHARES OF BENEFICIAL INTEREST REPRESENTED BY THIS PROXY WILL BE VOTED
AS DIRECTED BY THE UNDERSIGNED.

IF NO DIRECTION IS GIVEN, THIS PROXY WILL BE VOTED FOR THE PROPOSAL.

THIS PROXY IS SOLICITED BY THE BOARD OF TRUSTEES OF YOUR FUND AND SHOULD BE
RETURNED AS SOON AS POSSIBLE IN THE ENVELOPE PROVIDED. THE BOARD RECOMMENDS THAT
YOU VOTE IN FAVOR OF THE FOLLOWING:

TO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK. EXAMPLE: [box]

1. To elect two Class I trustees of the FOR WITHHOLD FOR ALL
fund, as named in the attached proxy ALL ALL EXCEPT
statement, to serve on the Board of (as marked below)
Trustees until their successors have been
duly elected and qualified. The [box] [box] [box]
nominees for trustees are:

01. Dr. R.H. Egdahl 02. S.K. West

To withhold authority to vote for one or more of the nominees, write the name(s)
of the nominee(s) on the line below:

__________________________________________

PLEASE SIGN, DATE AND RETURN THIS PROXY CARD

MHI_14537

PROXY FOR THE ANNUAL MEETING OF SHAREHOLDERS OF
PIONEER MUNICIPAL HIGH INCOME TRUST
To be held November 10, 2004

999 9999 9999 999

_________________________________________
Signature

_________________________________________
Signature of joint owner, if any

_________________________________________
Date MHI 14537

PLEASE RETURN YOUR SIGNED PROXY CARD IN THE ENCLOSED ENVELOPE

THE PREFERRED SHARES OF BENEFICIAL INTEREST REPRESENTED BY THIS PROXY WILL BE
VOTED AS DIRECTED BY THE UNDERSIGNED.

IF NO DIRECTION IS GIVEN, THIS PROXY WILL BE VOTED FOR THE PROPOSAL.

THIS PROXY IS SOLICITED BY THE BOARD OF TRUSTEES OF YOUR FUND AND SHOULD BE
RETURNED AS SOON AS POSSIBLE IN THE ENVELOPE PROVIDED. THE BOARD RECOMMENDS THAT
YOU VOTE IN FAVOR OF THE FOLLOWING:

TO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK. EXAMPLE: [box]

1. To elect three Class I trustees of the FOR WITHHOLD FOR ALL
fund, as named in the attached proxy ALL ALL EXCEPT
statement, to serve on the Board of (as marked below)
Trustees until their successors have been
duly elected and qualified. The [box] [box] [box]
nominees for trustees are:

01. Dr. R.H. Egdahl 02. S.K. West 03. J.F. Cogan, Jr.

To withhold authority to vote for one or more of the nominees, write the name(s)
of the nominee(s) on the line below:

__________________________________________

PLEASE SIGN, DATE AND RETURN THIS PROXY CARD

MHI_14537

PROXY FOR THE ANNUAL MEETING OF SHAREHOLDERS OF
PIONEER MUNICIPAL HIGH INCOME ADVANTAGE TRUST
To be held November 10, 2004

999 9999 9999 999

_________________________________________
Signature

_________________________________________
Signature of joint owner, if any

_________________________________________
Date MHA 14538

PLEASE RETURN YOUR SIGNED PROXY CARD IN THE ENCLOSED ENVELOPE

THE COMMON SHARES OF BENEFICIAL INTEREST REPRESENTED BY THIS PROXY WILL BE VOTED
AS DIRECTED BY THE UNDERSIGNED.

IF NO DIRECTION IS GIVEN, THIS PROXY WILL BE VOTED FOR THE PROPOSAL.

THIS PROXY IS SOLICITED BY THE BOARD OF TRUSTEES OF YOUR FUND AND SHOULD BE
RETURNED AS SOON AS POSSIBLE IN THE ENVELOPE PROVIDED. THE BOARD RECOMMENDS THAT
YOU VOTE IN FAVOR OF THE FOLLOWING:

TO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK. EXAMPLE: [box]

01. Dr. R.H. Egdahl 02. S.K. West

To withhold authority to vote for one or more of the nominees, write the name(s)
of the nominee(s) on the line below:

__________________________________________

PLEASE SIGN, DATE AND RETURN THIS PROXY CARD

MHA_14538

PROXY FOR THE ANNUAL MEETING OF SHAREHOLDERS OF
PIONEER MUNICIPAL HIGH INCOME ADVANTAGE TRUST
To be held November 10, 2004

999 9999 9999 999

_________________________________________
Signature

_________________________________________
Signature of joint owner, if any

_________________________________________
Date MHA 14538

PLEASE RETURN YOUR SIGNED PROXY CARD IN THE ENCLOSED ENVELOPE

THE PREFERRED SHARES OF BENEFICIAL INTEREST REPRESENTED BY THIS PROXY WILL BE
VOTED AS DIRECTED BY THE UNDERSIGNED.

IF NO DIRECTION IS GIVEN, THIS PROXY WILL BE VOTED FOR THE PROPOSAL.

THIS PROXY IS SOLICITED BY THE BOARD OF TRUSTEES OF YOUR FUND AND SHOULD BE
RETURNED AS SOON AS POSSIBLE IN THE ENVELOPE PROVIDED. THE BOARD RECOMMENDS THAT
YOU VOTE IN FAVOR OF THE FOLLOWING:

TO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK. EXAMPLE: [box]

01. Dr. R.H. Egdahl 02. S.K. West 03. J.F. Cogan, Jr.

To withhold authority to vote for one or more of the nominees, write the name(s)
of the nominee(s) on the line below:

__________________________________________

PLEASE SIGN, DATE AND RETURN THIS PROXY CARD

MHA_14538