Indian Overseas Bank Customer Care & Net Banking Helpline
iob.bank.in
Last verified Oct 2026 · numbers can change, confirm on the official site.
All contact details
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About Indian Overseas Bank
Two toll-free lines carry almost everything at Indian Overseas Bank: 1800 425 4445 and 1800 890 4445, printed in the header of every page on its own site. Net banking, IOB Mobile, UPI, cards and account queries all go there.
Behind them sit the Customer Service Department on 044 28591029 and a separate digital complaints desk for a failed transfer or a UPI problem. NRI customers have their own helpdesk, and a complaint that needs writing down goes through IOB's own online grievance portal, which gives you a number to track it with.
For a lost or misused card, ring and ask for a block before anything else, with your account or customer ID to hand. IOB never asks for an OTP, PIN or password on a call, whoever the caller says they are.
Indian Overseas Bank helpline — questions
1800 425 4445 and 1800 890 4445, both toll-free and both printed in the header of every page on IOB's site. They cover net banking, IOB Mobile, UPI, cards and account queries.
1800 425 4445 aur 1800 890 4445, dono toll-free hain. Net banking, mobile banking ya card se judi shikayat inhi par darj hoti hai.
Yes, both of them. 1800 425 4445 and 1800 890 4445 cost nothing to call from within India. The departmental lines in Chennai, including 044 28591029, are ordinary landlines at your usual rate.
IOB marks its overseas customer lines as available 24x7 on its customer care page. The Chennai department numbers keep office hours, so anything needing the back office is better raised on a working day.
The Digital Complaints desk on 044 24371120 handles failed transfers, UPI and card transactions, apart from the general toll-free lines. The Customer Service Department in Chennai is on 044 28591029, and the online grievance portal takes the same complaint in writing.
IOB runs its own online grievance portal, linked from its site as Lodge a Complaint. It takes the complaint without a phone call and gives you a complaint number, which is what you quote to track it or to take it further.
Call the toll-free line at once and ask for the card to be blocked; you can also suspend a debit card yourself inside net banking. IOB runs a cyber fraud desk on 044 2858 4890 with [email protected], and points customers at the national cyber police helpline 1930 as well.
Yes. The NRI helpdesk answers on 044 2435 3640, with [email protected] in writing. Accounts, remittances and deposit queries from abroad go there rather than to the toll-free lines.
Yes. Tap Download to save IOB's customer care numbers as one image, with the verified contacts and hours on it.
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Helpline details are compiled from public sources and verified periodically. Not affiliated with Indian Overseas Bank. Always confirm on the official website. How we verify this.