Bank Merger Account Problems: IFSC, Cheques, EMIs and FDs

"My bank merged with another bank, and now my SIP failed, a cheque I gave my landlord bounced, and my net banking login does not work." Your money is safe: when banks merge, your accounts, deposits and loans move to the merged bank. What breaks are the identifiers and links around them: IFSC, cheque books, mandates, logins and payees. Update each one using the checklist below, and ask the bank to reverse any charges caused by the switch.

RBI sanctions mergers of banks under the Banking Regulation Act (for voluntary mergers, Section 44A), and several co-operative bank mergers took effect in 2026, with a foreign bank's Indian branches due to merge into a private bank from 1 December 2026. The problems below are common to all of them.

What changes in a merger and what does not

Step-by-step: fixing problems after a merger

In the first hour (once you learn of the merger)

1. Read the bank's notice. It gives the effective date, any new account number, new IFSC, cheque book cut-off and the timeline for app migration. Save it.
2. List every payment linked to the account. Salary, rent received, EMIs, SIPs, insurance premiums, credit card auto-pay, utility auto-debits, subscriptions and UPI autopay.
3. Find every cheque you have issued. Post-dated cheques for rent, loans or school fees need to be replaced before the cut-off.

On the first day

4. Update your employer and anyone who pays you with the new IFSC and account number. Payments sent to the old IFSC are often routed for a transition period, but do not rely on it.
5. Order a new cheque book through the app or branch, and hand over replacement cheques. Ask the recipient to return the old ones.
6. Re-register for net banking and the app when the bank's migration window opens. Re-add payees and check that standing instructions moved across.
7. Check each mandate. Look at your next EMI, SIP and premium debit dates and confirm they are active in the merged bank's mandate list, or ask the branch in writing.
8. Update linked records: income tax e-filing (for refunds), EPFO, demat and mutual fund folios, insurance policies, and government subsidy or pension accounts.

If something has already failed

9. Ask for charge reversal. If an EMI, SIP or cheque failed because of the migration and not because of low balance, ask the bank in writing to reverse the bounce charges and to send a letter you can share with the lender or payee. Many lenders reverse their own penalty when shown the bank's letter.
10. Escalate to the grievance or nodal officer if the branch does not act.
11. File with the RBI Ombudsman at cms.rbi.org.in if there is no resolution within 30 days. Under the Reserve Bank – Integrated Ombudsman Scheme, 2026, file within 90 days of the end of that 30-day period or the bank's last reply, whichever is later.

If a cheque you gave has bounced, the payee may have legal remedies, so act fast; see our guide on what to do when a cheque bounces.

The deposit insurance trap: a worked example

DICGC insures up to ₹5 lakh per depositor, per bank, covering principal and interest, for deposits held in the same right and capacity. Before a merger, you could have ₹5 lakh insured at each bank separately. After the merger, they are one bank.

Suppose Anil holds, in his individual name:

• Bank A: savings ₹1,00,000 + FD ₹3,00,000 = ₹4,00,000
• Bank B: FD ₹3,00,000

A merger usually involves a stronger bank, so this is a precaution, not a reason to panic. But if you prefer full cover, you could move ₹2,00,000 to a different bank, or hold part of it in a different capacity (for example a joint account with your spouse, which is insured separately). Use our FD calculator to compare what the moved amount would earn at the new bank's rate. Our guide on what happens if a bank fails explains the cover rules in detail.

Fixed deposits: watch the auto-renewal

Your existing FDs keep their original rate and maturity date. The risk is at maturity: if the deposit auto-renews, it renews at the merged bank's card rate, which may be lower or higher. Before maturity:

• Compare the merged bank's rate with others for the same tenure.
• Resubmit Form 15G or 15H if you use them, since the new bank may need fresh forms to stop TDS.
• Check that the FD receipt or advice shows the correct name, nominee and maturity instructions.

Ready-to-copy complaint message

Subject: Payment failure due to bank merger – request for reversal of charges

Dear Sir/Madam,

My account [old number / new number] was migrated to your bank following the merger effective [date]. On [date], my [EMI / SIP / cheque number] for ₹[amount] to [payee] failed with the reason [reason], even though my account had sufficient balance (statement attached).

This appears to be due to [mandate not migrated / old IFSC / old cheque book]. Please:

1. Reverse the return charges of ₹[amount] debited on [date].
2. Confirm that the mandate is now active, or tell me what I must do.
3. Issue a letter confirming the failure was due to the merger, so that I can request the payee to waive their penalty.

Regards, [Name], [registered mobile]

What not to do

• Do not keep using old cheques past the cut-off. They can be returned unpaid.
• Do not assume every mandate moved automatically. Check each one before its due date.
• Do not share OTPs with callers offering to "migrate" your account. Merger season is a favourite time for impersonation scams. Re-register only through the bank's official app or website.
• Do not ignore the change in charges. A different minimum-balance rule can lead to unexpected penalties; see minimum balance charges.
• Do not close the account in a hurry. If you want to leave, first move every mandate and payment so nothing bounces in the gap.

Key takeaways

• A merger moves your money, deposits and loans intact; it is the IFSC, cheque books, logins and mandates that break.
• Update payers, replace post-dated cheques, re-register net banking and confirm every EMI and SIP mandate.
• Old cheque books stop working after the merged bank's cut-off date.
• Existing FDs keep their terms till maturity; renewals use the merged bank's rates.
• DICGC's ₹5 lakh cover applies once to the merged bank, so deposits in both banks may lose part of their insurance.
• Ask for reversal of charges caused by the migration, and escalate to cms.rbi.org.in after 30 days.