Report of Independent Registered Public Accounting
Firm

To the Shareholder and
Board of Directors of Pioneer Trust Series V:
In planning and performing our audit of the financial
statements of Pioneer Trust Series V (the Company)
(comprised of Pioneer Disciplined Growth Fund, Pioneer
Disciplined Value Fund, Pioneer Global Equity Fund, and
Pioneer High Income Municipal Fund) (the Funds) as of and
for the year ended August 31, 2012, in accordance with the
standards of the Public Company Accounting Oversight
Board (United States), we considered the Company'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-SAR, but not for the purpose of expressing an
opinion on the effectiveness of the Company's internal control
over financial reporting. Accordingly, we express no such
opinion.
The management of the Company 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 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 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 Company'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 Company'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 August 31, 2012.
This report is intended solely for the information and use of
management and the Board of Trustees of Pioneer Trust
Series V and the Securities and Exchange Commission and
is not intended to be and should not be used by anyone other
than these specified parties.



Ernst & Young LLP

Boston, Massachusetts
October 24, 2012