Report of Independent Registered Public Accounting Firm

To the Shareholders and
Board of Trustees of Investors Cash Trust
In planning and performing our audit of the financial
statements of Investors Cash Trust - Treasury Portfolio
(the Company) as of and for the year ended
March 31, 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 March 31, 2009.
This report is intended solely for the information and
use of management and the Board of Trustees of
Investors Cash 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
May 26, 2009