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IBAN formats by country

United Kingdom IBAN Format (GB)

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A United Kingdom IBAN has 22 characters: GB, two check digits and an 18-character national account number (BBAN), which contains a 4-character bank code.

Length
22 characters
IBAN structure
GB2!n4!a6!n8!n
Bank code length
4 characters
Example
GB29 NWBK 6016 1331 9268 19

United Kingdom IBAN structure

After the country code and check digits, the BBAN is 4 upper-case letters, then 6 digits, then 8 digits.

PartIn the exampleWhat it is
Country codeGBISO 3166 code of the country
Check digits29Two digits from the ISO 7064 MOD 97-10 calculation
Bank codeNWBK4 characters, national bank identifier
Branch code6016136 characters, branch identifier
Account number31926819The rest of the BBAN, including any national check digits

The example is the sample IBAN given for this country in the IBAN registry, not an account to pay. Structure notation: n digits, a upper-case letters, c letters or digits; 4!n means exactly four digits.

The Isle of Man, Guernsey and Jersey use GB IBANs.

Check a United Kingdom IBAN

Questions

How many characters does a United Kingdom IBAN have?
22 characters: the country code GB, two check digits and a BBAN of 18 characters.
What does a United Kingdom IBAN look like?
For example GB29 NWBK 6016 1331 9268 19 on paper, or GB29NWBK60161331926819 in electronic form.
Where is the bank code in a United Kingdom IBAN?
The national bank code has 4 characters, at positions 5 to 8 of the IBAN.
How do I check a United Kingdom IBAN?
Paste it into the IBAN checker on this site. It tests the length, the structure and the check digits in your browser.

Other countries with 22-character IBANs

All IBAN countries

Formats from the IBAN Registry (release 99, December 2024) that Swift publishes as the ISO 13616 registration authority, read from public mirrors of the registry. Check the current registry before relying on a format.