INTERNAL CONTROL RPT

Report of Independent Registered Public Accounting Firm

To the Shareholders and Board of Trustees of
Pioneer High Income Trust:

In planning and performing our audit of the financial statements of Pioneer
High Income Trust (the "Trust") as of and for the year ended March 31, 2020,
in accordance with the standards of the Public Company Accounting Oversight
Board (United States), we considered the Trust's internal control over
financial reporting, including controls over safeguarding securities, as a
basis for designing our auditing procedures for the purpose of expressing
our opinion on the financial statements and to comply with the
requirements of Form N-CEN, but not for the purpose of expressing an opinion
on the effectiveness of the Trust's internal control over financial reporting.
Accordingly, we express no such opinion.

The management of the Trust is responsible for establishing and maintaining
effective internal control over financial reporting. In fulfilling this
responsibility, estimates and judgments by management are
required to assess the expected benefits and related costs of controls.
A company's internal control over financial reporting is a process designed
to provide reasonable assurance regarding the reliability of
financial reporting and the preparation of financial statements for external
purposes in accordance with U.S. generally accepted accounting principles.
A company's internal control over financial reporting includes those policies
and procedures that (1) pertain to the maintenance of records that, in
reasonable detail, accurately and fairly reflect the transactions and
dispositions of the assets of the company; (2) provide reasonable assurance
that transactions are recorded as necessary to permit preparation of financial
statements in accordance with U.S. generally accepted accounting principles,
and that receipts and expenditures of the company are being made only in
accordance with authorizations of management and directors of the company;
and (3) provide reasonable assurance regarding prevention or timely detection
of unauthorized acquisition, use or disposition of a company's assets that
could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting
may not prevent or detect misstatements. Also, projections of any evaluation
of effectiveness to future periods are subject to the risk
that controls may become inadequate because of changes in conditions, or
that the degree of compliance with the policies or procedures may deteriorate.

A deficiency in internal control over financial reporting exists when the
design or operation of a control does not allow management or employees,
in the normal course of performing their assigned functions, to
prevent or detect misstatements on a timely basis. A material weakness is
a deficiency, or a combination of deficiencies, in internal control over
financial reporting, such that there is a reasonable possibility that a
material misstatement of the company's annual or interim financial
statements will not be prevented or detected on a timely basis.

Our consideration of the Trust's internal control over financial reporting
was for the limited purpose described in the first paragraph and would not
necessarily disclose all deficiencies in internal control that
might be material weaknesses under standards established by the Public
Company Accounting Oversight Board (United States). However, we noted no
deficiencies in the Trust's internal control over financial
reporting and its operation, including controls over safeguarding
securities that we consider to be a material weakness as defined above as
of March 31, 2020.

This report is intended solely for the information and use of management
and the Board of Trustees of Pioneer High Income Trust, and the Securities
and Exchange Commission and is not intended to be and
should not be used by anyone other than these specified parties.


/s/ ERNST& YOUNG LLP


Boston, Massachusetts
May 29, 2020

OTHER REQUIRED INFO

Form: N-CEN/A

Explanation:

This amendment is being filed to address incorrect or omitted responses from the original submission.