6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSIONWashington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN ISSUER PURSUANT TO RULE 13a-16 OR

15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of August 2025

Commission File Number: 001-15002

ICICI Bank Limited

(Translation of registrant’s name into English)

ICICI Bank Towers,

Bandra-Kurla Complex

Mumbai, India 400 051

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file

annual reports under cover Form 20-F or Form 40-F.

Table of Contents

Items:

OTHER NEWS

Subject:Disclosure under Indian Listing Regulations

IBN

ICICI Bank Limited(the ‘Bank’) Report on Form 6-K

This has reference to our earlier letter dated January 4, 2025 wherein the Bank had disclosed an Order received from Maharashtra Goods and Service Tax (GST) Department for a demand of ₹ 26,12,07,438/- and equivalent amount of penalty and interest as applicable. The Bank had filed an appeal against the said Order.

On August 1, 2025 at 5:02 p.m., the Bank has received an Order in appeal from Maharashtra GST Department raising tax demand of ₹ 26,12,07,438/- and equivalent amount of penalty and interest as applicable. The Bank was in the process of evaluating the contents of the Order which has resulted in a delay in this disclosure.

The Bank will take appropriate steps, including contesting the order through a further appeal within prescribed timelines.

Please take the above information on record.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorised.