Exercise of call option on US$1,000,000,000 3.7% Additional Tier 1 Notes issued by HDFC Bank Limited

CIN: L65920MH1994PLC080618 HDFC Bank Limited, Email: shareholder.grievances@hdfc.bank.in HDFC House, Website: www.hdfc.bank.in H T Parekh Marg, 165-166 Backbay Reclamation, Churchgate, Mumbai- 400 020 Tel. No.:022-66316000 Ref. No. SE/2026-27/78 July 24, 2026 BSE Limited National Stock Exchange of India Limited Dept. of Corporate Services The Listing Department Phiroze Jeejeebhoy Towers, Exchange Plaza, Dalal Street, Fort, Bandra Kurla Complex, Mumbai – 400 001 Mumbai – 400 051 Scrip Code:500180 Scrip Symbol: HDFCBANK Dear Sir / Madam, Sub: Intimation under Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015- Exercise of call option on US$ 1,000,000,000 3.7% Additional Tier 1 Notes issued by HDFC Bank Limited (“Bank”) We wish to inform you that the Bank has elected to exercise the Call Option in respect of the US$ 1,000,000,000 3.7% Additional Tier 1 Notes (“Bonds”) issued on August 25, 2021, in accordance with condition 4(b) (Redemption at the Option of the Issuer) of the Terms and Conditions of the said Bonds. We wish to further inform you that the Bank will redeem the said Bonds in full on the First Call Date, i.e., August 25, 2026, at the applicable redemption price, together with accrued and unpaid interest/distributions up to (but excluding/including, as applicable) the redemption date, in accordance with the Terms and Conditions of the said Bonds. A letter dated July 24, 2026 has been issued to the Trustee i.e. Citicorp International Limited, with an instruction to issue a notice of redemption to all the eligible Bondholders as per the prescribed timelines and mode of delivery. The terms and conditions of the call exercise are given below: Nature of Description of ISIN CUSIP Amount Call/ Redemption Price Securities securities Outstanding Redemption Date Additional Tier1 US$ USY3119PFH74 Y3119PFH7 US$ August 25, 100% of the principal Notes sold under 1,000,000,000 1,000,000,000 2026 amount outstanding Regulation S 3.7% Additional (together with accrued and Additional Tier1 Tier 1 Notes US40415FAA93 40415FAA9 unpaid interest/ Notes sold under distributions up to, but Rule 144A excluding/ including, the redemption date, as applicable under the terms and conditions.) A copy of the said letter is also enclosed herewith. Regd. Office: HDFC Bank Limited, HDFC Bank House, Senapati Bapat Marg, Lower Parel (West), Mumbai – 400 013 This is for your information and record. Thanking you, Yours faithfully, For HDFC Bank Limited Ajay Agarwal Company Secretary Group Head – Secretarial & Group Oversight Encl: as above