Nationwide IBAN calculator
Nationwide IBANs start with GB, two check digits and NAIA, followed by your six-digit sort code and eight-digit account number. Enter your sort code and account number to get your IBAN, built in your browser; this calculator is not affiliated with Nationwide.
Calculate your Nationwide IBAN
Nationwide’s BIC is NAIAGB21, so the IBANs of Nationwide accounts carry NAIA, followed by your sort code and account number.
Virgin Money accounts, now part of Nationwide, use other BICs, and Nationwide says accounts with sort codes starting 08 cannot receive international payments. This page is for Nationwide’s own accounts.
Holyheld is not affiliated with Nationwide. Your bank’s app or statement shows your IBAN too; if it differs from the one built here, use your bank’s.
Already have an IBAN? Check it in the IBAN checker.
Nationwide IBAN format
| Detail | Value |
|---|---|
| IBAN length | 22 characters |
| Starts with | GBkk NAIA |
| Bank code in the IBAN | NAIA |
| BIC | NAIAGB21 |
| Sort code | Your six-digit sort code |
| Printed format | GBkk NAIA ssss sscc cccc cc |
| Source | “Nationwide’s BIC is NAIAGB21” (nationwide.co.uk, checked 27 October 2026) |
Frequently asked questions
22 characters: GB, two check digits, the bank code NAIA, then your six-digit sort code and eight-digit account number. Printed in groups of four, it reads GBkk NAIA ssss sscc cccc cc.
No. Holyheld is not affiliated with Nationwide. The calculator applies the published the United Kingdom IBAN format with Nationwide’s bank code NAIA, taken from Nationwide’s own website. It runs in your browser and sends nothing to a server.
In your Nationwide app, online banking or statements, which usually show the IBAN itself as well. If the IBAN your bank shows differs from the one built here, use your bank’s.
Paying an IBAN from stablecoins? Holyheld Business converts USDC to EUR and pays it out by SEPA. See pricing or the guide to off-ramping USDC to an IBAN.