TDA Telephone and Data Systems Inc

FEDERATED INCOME SECURITIES TRUST

Federated Investors Funds

4000 Ericsson Drive
Warrendale, Pennsylvania 15086-7561

May 31, 2013

EDGAR Operations Branch

U.S. Securities and Exchange Commission

Division of Investment Management

100 F Street, N.E.

Washington, DC 20549

RE: FEDERATED INCOME SECURITIES TRUST

Federated Real Return Bond Fund

Class A Shares

Class C Shares

Institutional Shares

Federated Floating Rate Strategic Income Fund

Class A Shares

Institutional Shares

Federated Fund for U.S. Government Securities

Class A Shares

Class B Shares

Class C Shares

1933 Act File No. 33-3164

1940 Act File No. 811-4577  

Dear Sir or Madam:

Pursuant to Rule 497(j) of the Securities Act of 1933, the above-referenced Trust hereby certifies that the definitive forms of Prospectuses and Statements of Additional Information dated May 31, 2013, that would have been filed under Rule 497(c), do not differ from the forms of Prospectuses and Statements of Additional Information contained in the most recent Registration Statement for the Trust. This Registration Statement was electronically filed under Rule 485(b) as Post-Effective amendment No. 124 on May 29, 2013.

If you have any questions regarding this certification, please contact me at (412) 288-2614.

Very truly yours,

/s/ Andrew P. Cross

Andrew P. Cross

Assistant Secretary

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Telephone and Data Systems (NYSE:TDA)
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Telephone and Data Systems (NYSE:TDA)
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