Standard IBAN format and structure

An IBAN (International Bank Account Number) is a standard format bank account number which shows the country the account is held in, as well as the basic bank account number (BBAN) for the account.

It’s only 16 - 34 alphanumeric characters long, but your IBAN contains much of the information needed to make sure you can send and receive international payments safely.

Select the country from the list below to see the country-specific IBAN structure.

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IBAN format by country

The structure of IBANs is globally agreed and standardised. All IBAN numbers follow the same format, and include only the numbers 0 - 9 and the 26 letters of the Latin alphabet (A-Z).

However, because different countries have different methods for expressing basic bank account numbers, you’ll notice that IBAN length varies depending on where you’re sending money.

Don’t worry though - as long as you follow the agreed format shown below and used in our calculator tools, your payment will arrive safely.

IBAN Breakdown format and structure

Each IBAN includes the same basic set of information:

A 2 letter country code (for example, ES for Spain, or GB for the United Kingdom).
2 digits which are used to validate the IBAN before a payment is processed.
The BBAN (Basic Bank Account Number) for the specific account. This follows the protocols of the country the account is held in, and can be up to 30 characters long.

European Countries

Non-European Countries

Generate & Validate IBAN

Click on "Generate" button below to use IBAN Calculator to generate IBAN or "Validate" button to check an IBAN.

IBAN Generator

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IBAN Checker

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