IBAN Validator
IBANs always follow a set format. This means we can tell if yours is valid or not, and show you what each part of it represents.
Validate an IBAN
Type it in here and we'll tell you if it's the right format.
Example of an IBAN in the United Kingdom 🇬🇧
GB
Country code
82
Check digits
WEST
Bank code
1234**
Branch code
9876****
Account number
Frequently asked questions
An International Bank Account Number (IBAN) is a standardized format for identifying bank accounts across national borders. Used in over 80 countries, it combines country code, check digits, and domestic account details into a single identifier for international transfers.
IBANs are validated using the MOD-97 algorithm (ISO 7064). The country code and check digits are moved to the end, letters are converted to numbers, and the result is divided by 97. A valid IBAN always produces a remainder of 1.
You need an IBAN for international bank transfers, especially within Europe and SEPA countries. It's the safest way to ensure your money reaches the correct account. Over 80 countries now use the IBAN system.
If validation fails, check for typing errors — IBANs are long and easy to mistype. Make sure you're using the electronic format without spaces. If the format is correct but still invalid, confirm the IBAN with your bank or recipient.