Report of Independent Registered Public Accounting
Firm

To the Shareholders and
Board of Trustees of Cash Account Trust
In planning and performing our audits of the
financial statements of Cash Account Trust
(comprising the Money Market Portfolio, Government
& Agency Securities Portfolio and
Tax-Exempt Portfolio) (collectively, the Company)
as of and for the year ended April 30,
2009, 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 April 30, 2009.
This report is intended solely for the information
and use of management and the Board
of Trustees of Cash Account 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.



Ernst & Young LLP

Boston, Massachusetts
June 22, 2009