How Many Digits?
IOB account numbers are always 15 digits long
Structure of the 15-Digit IOB Account Number
The format is structured as follows:
- First 4 digits: Branch code
- Next 2 digits: Product/account type code
- 01 = Savings, 02 = Current, 03 = Loan, 04 = Deposit
- Last 8 digits: Unique customer account sequence number
Example: 0125 02 12345678
- Branch
0125 - Account type
02(Current) - Unique customer number:
12345678
Why This Format Matters
- Embeds branch and account type information, making routing and processing smoother for NEFT/RTGS/IMPS transactions.
- Reduces errors by maintaining a consistent, sortable structure across all accounts.
How to Locate Your IOB Account Number
You can quickly find your 15-digit account number using any of these methods:
1. Mobile Banking / IOB App
Log in and go to your Profile or My Accounts section. Your account number is displayed there. If not enrolled, you can register and join mobile banking first.
2. Passbook or e‑Passbook
Your account number is printed on the opening page of your physical passbook. You can also view it through the e‑passbook feature in mobile or internet banking.
3. Cheque Book
It is printed on every cheque leaf issued by IOB.
4. Customer Support
Call 1800 425 4445 from your registered mobile number to receive your account number after verification.
5. Branch Visit
Visit your nearest IOB branch with valid ID to get your full account number from bank staff.
Quick Reference Table
| Feature | Details |
|---|---|
| Account length | 15 digits |
| Format breakdown | Branch (4) + Account type (2) + Unique number (8) |
| Where to find it | Mobile app, passbook, cheque, customer care, branch |
| Use case | NEFT/RTGS/IMPS transfers, bank forms, documentation |
| Accuracy importance | Always share the complete 15-digit number and IFSC |
Final Thoughts
Indian Overseas Bank account numbers consist of a structured 15-digit format—branch code, account type, and a unique customer sequence. You can access it easily from mobile or internet banking, passbook, chequebook, or via phone and branch support.
