IBAN checker

Check an IBAN is correctly formed before you pay, and see exactly what’s wrong if it isn’t. The IBAN isn’t sent anywhere.

SWIFT IBAN Registry (ISO 13616)Last checked 4 October 2026

Enter an IBAN to check it

We check the country, the length and layout, and the check digits, and show the bank and account details it holds.

What people ask next

How we checked

Country, length and layout[1]The country code, the number of characters and where letters and numbers go	–
Check digits[1]The MOD 97 check from ISO 13616, which catches a mistyped or swapped character	–
Bank and account details[1]Read from the IBAN itself	–

What’s in a UK IBAN

A UK IBAN has 22 characters. It carries your sort code and account number, so a bank abroad can find the account.

GBCountry

82Check digits

WESTBank code

123456Sort code

98765432Account number

How the check digits work

The two digits after the country code are worked out from the rest of the IBAN. If one character is mistyped, or two are swapped, the sum no longer works and the checker tells you. It can’t tell you who holds the account.

Where to find your IBAN

UK banks show it in their app or online banking, usually under account details, and on paper statements. Read how to find your IBAN, or see the IBAN format for every country.