Kindly refer the attached disclosure.

IDFCFIRSTBANK/SD/119/2026-27 August 19, 2026 National Stock Exchange of India Limited BSE Limited Mumbai 400 051 Mumbai 400 001 NSE Symbol: IDFCFIRSTB BSE Scrip Code: 539437 Sub: Successful Pricing of Additional US$ 100 Million Senior Notes Ref.: Disclosure under Regulation 30 of the SEBI (LODR) Regulations, 2015 Dear Sir / Madam, In continuation of our earlier disclosure dated August 18, 2026, we are pleased to inform that the Bank, acting through its IFSC Banking Unit, has successfully priced an additional US$ 100 million Senior Notes (the “Additional Notes”) on August 19, 2026, as an upsize of the US$ 500 million Senior Notes priced on August 18, 2026. Pursuant to the additional issuance of US$ 100 million, the consolidated issue size of the Senior Notes stands increased to US$ 600 million. The Additional Notes are subject to the same terms and conditions as those disclosed in our earlier disclosure dated August 18, 2026. Thanking You, Yours faithfully, For IDFC FIRST Bank Limited. Satish Gaikwad General Counsel and Company Secretary IDFC FIRST Bank Limited Corporate Office: IDFC FIRST Bank Tower, (The Square), C-61, G Block, Bandra-Kurla Complex, Bandra (East), Mumbai - 400 051, Maharashtra. Tel: +91 22 7132 5500 Registered Office: KRM Tower, 7th Floor, No. 1, Harrington Road, Chetpet, Chennai 600 031, Tamil Nadu. Tel: +91 44 4571 6477 CIN: L65110TN2014PLC097792 | E-mail: bank.info@idfcfirstbank.com; | Website: www.idfcfirst.bank.in