E-mail Communication to Member(s)/Shareholder(s) on Deduction of Tax at Source on Final Dividend for the year 2025-2026

~ $f%~ I fclfa:les ~()Ifd:tC1 cbli!lfC"li!l/Corporate Office ~ 6T3"R/OIL House, Oil India Limited ~ Gf.1 PlotNo.19,~Sector -16A, amcr m<l5R cf; 3fcl1ar ai'h!srl Noida-201301 (;nr.) (U.P.) "lM1L!"l1$ ~~ . '(!CP ~ m/Phone: +91-120-2419000 AMaharatna CPSEunder OIL INDIA ~-~/E-mail: oilindia@oilindia.in Government of India Ref. No. OILISEC/32-33INSE-BSE Dated: 14.08.2026 National Stock Exchange of India Ltd. BSE Limited ' Exchange Plaza, Department of Corporate Service Plot no. CIl, G Block, Phiroze Jeejeebhoy Towers Bandra-Kurla Complex Dalal Street, Bandra (E), Mumbai - 400 051 Mumbai - 400 001 Scrip: OIL Scrip: 533106 Sub: E-mail Communication to Member(s)/Shareholder(s) on Deduction of Tax at Source on Final Dividend for the year 2025-26 Sir/ Madam, Please find enclosed herewith the communication regarding Deduction of Tax at Source on Final Dividend for the FY 2025-26, sent to the Member(s)/Shareholder(s) of the Company, on their e-rnail addresses available with the Company/RTAIDepositories Participant as per latest BENPOS. This is for your information & records please. Thanking you, Yours faithfully, For OilIndia Limited AK Sahoo Company Secretary & Compliance Officer Encl: As above ~~~ra,JH\jfIGi ,.,3RlOl, IRegd. Office Duliajan, Pin - 786602, Dibrugarh, Assam, Tel.: +913742804510, +913742800427 =============== Web: www.oil-india.comICIN -L11101AS1959GOI001148 OIL INDIA LIMITED CIN: L11101AS1959GOI001148 Registered Office: Duliajan, Distt: - Dibrugarh, Assam - 786602 Corporate Office: - Plot No 19, Sector-16A, Noida, U.P. - 201301 Website: www.oil-india.com Email: investors@oilindia.in Tel: 0120-2419000 August 14, 2026 Dear Member(s)/Shareholder(s), As you are aware, the Board of Directors of the Company had recommended Final Dividend (2025-26) @ Re 1/- per Share, subject to approval at the Annual General Meeting (“AGM”). The Final Dividend, if approved at the ensuing AGM shall be paid as per statutory provisions. As per Income Tax Act, 2025, any dividend paid or distributed by a Company is taxable in the hands of the Shareholders. The Company shall therefore be required to deduct applicable tax at source at the time of making the payment of the dividend. For the convenience of Shareholders, the applicable provisions and related information regarding TDS on Dividend have been compiled and made available on our website (www.oil-india.com) as per the following path:- Investors → Investor Services → TDS on Dividend The weblink of above information is as follows: - https://www.oil-india.com/files/investor_services_documents/FAQs_on_Tax_deducted_at_Source_0.pdf Kindly note that the relevant documents towards TDS should be uploaded with KFin Technologies Limited, the Registrar and Transfer Agent (“RTA”), at https://ris.kfintech.com/clientservices/investors/taxforms.aspx on or before September 7, 2026. For updation of your personal details including PAN, Bank Account, Email Id, Mobile Number etc, you are requested to contact:  in case of shareholding in electronic form - with your Depository Participant.  in case of shareholding in physical form - with the RTA viz. KFin Technologies Limited. For any clarification, you may contact the RTA as per details given below: KFin Technologies Limited Selenium Tower B, Plot Nos. 31 & 32, Financial District Nanakramguda, Serilingampally, Hyderabad, Rangareddi, Telangana, India 500032 Toll Free Number: 1800 309 4001 Tel:- +91 40 67162222, 33211000 Email: einward.ris@kfintech.com We seek your co-operation for smooth processing of Dividend. Thanking you, Yours Sincerely, For Oil India Limited Sd/- A. K. Sahoo Company Secretary M. No- A12385