United Kingdom IBAN at a Glance
| Country | United Kingdom (GB) |
| Length | 22 characters |
| Structure (after GB + check digits) | 4a bank, 6n sort code, 8n account |
| Example IBAN | GB29 NWBK 6016 1331 9268 19 |
| SEPA member | Yes |
The example above is the published ISO registry sample for United Kingdom. It passes checksum validation but is not a real account.
How to Read a United Kingdom IBAN
Every IBAN starts the same way: the first two letters are the country code (GB) and the next two digits are the mod-97 check digits, computed over the entire number. What follows is United Kingdom's domestic account format: 4a bank, 6n sort code, 8n account.
For an international transfer to United Kingdom you will typically need this IBAN plus the bank's SWIFT/BIC code, which you can verify with our SWIFT Code Checker.
Frequently Asked Questions
How long is a United Kingdom IBAN?
Exactly 22 characters, always starting with GB.
Is United Kingdom part of SEPA?
Yes. Euro transfers to and from other SEPA countries are typically fast and low-cost.
Can I validate a United Kingdom IBAN without sending it anywhere?
Yes, use the checker above. Validation runs in your browser using the ISO 7064 mod-97 algorithm; the IBAN never leaves your device.