Exhibit 13

Securities and Exchange Commission

100 F Street NE

Washington, DC 20549

Ladies and Gentlemen:

The certification set forth below is being submitted in connection with the Annual Report on Form 20-F for the year ended March 31, 2013 (the “Report”) for the purpose of complying with Rule 13a-14(b) or Rule 15d-14(b) of the Securities Exchange Act of 1934 (the “Exchange Act”) and Section 1350 of Chapter 63 of Title 18 of the United States Code.

Ms. Chanda Kochhar, the Managing Director & Chief Executive Officer, and Mr. N.S. Kannan, Executive Director & Chief Financial Officer of ICICI Bank Limited, each certifies that, to the best of their knowledge:

1. the Report fully complies with the requirements of Section 13(a) or 15(d) of the Exchange Act; and

2. the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of ICICI Bank Limited.

Date: July 31, 2013

Chanda Kochhar

Managing Director & Chief Executive Officer

N. S. Kannan

Executive Director & Chief Financial Officer