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 an 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. You can browse every SWIFT code in United Kingdom for free. Timing matters too: transfers do not settle on United Kingdom bank holidays, so check the calendar before sending anything urgent.
Frequently Asked Questions
How long is an United Kingdom IBAN?
United Kingdom IBANs are exactly 22 characters long, starting with GB followed by 2 check digits.
Is United Kingdom part of SEPA?
Yes, United Kingdom participates in SEPA (Single Euro Payments Area), so euro transfers to and from other SEPA countries are fast and low-cost.
Can I validate an 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.
What is the structure of an United Kingdom IBAN?
After the country code and check digits, an United Kingdom IBAN contains: 4a bank, 6n sort code, 8n account.