What is an IBAN?
An IBAN, or International Bank Account Number, is a standardised system for identifying bank accounts across national borders to facilitate the communication and processing of cross border transactions with a reduced risk of transcription errors.
The IBAN was originally developed to facilitate payments within the European Union, but its usage has since expanded globally. It consists of up to 34 alphanumeric characters comprising a country code, two check digits, and a number that includes the domestic bank account number, branch identifier, and potential routing information.
IBAN Structure Explained
Every IBAN follows the same structure:
- Country Code (2 letters): The ISO 3166-1 alpha-2 code for the account's country (e.g., GB for the United Kingdom, DE for Germany).
- Check Digits (2 numbers): Used to validate the IBAN using the MOD-97 algorithm.
- BBAN (Basic Bank Account Number): The domestic bank account identifier — format varies by country.
IBAN by Country Examples
Here are examples of IBANs from different countries to illustrate the varying formats:
- Germany (DE): DE89 3704 0044 0532 0130 00 — 22 characters
- United Kingdom (GB): GB29 NWBK 6016 1331 9268 19 — 22 characters
- France (FR): FR76 3000 6000 0112 3456 7890 189 — 27 characters
- Turkey (TR): TR33 0006 1005 1978 6457 8413 26 — 26 characters
Why is IBAN Important?
Before the introduction of IBAN, international transfers often failed or were delayed because different countries used incompatible bank account formats. A UK sort code looks completely different from a German BLZ or a French RIB. The IBAN solves this by providing a single, internationally recognised format.
The key benefits of IBAN include reduced transcription errors, faster processing of international payments, lower costs for cross-border transfers, and full compatibility with the SEPA payment area in Europe.
How to Find Your IBAN
You can typically find your IBAN on your bank statement, in your online banking portal, or by contacting your bank directly. In many countries, your IBAN is printed on your debit or credit card.
IBAN vs Account Number
Your regular account number is part of your IBAN, but not the whole thing. The IBAN adds the country code and check digits to make your account globally identifiable. Never share just your account number for international transfers — always use the full IBAN.
Validate Your IBAN for Free
Before making any international transfer, it is strongly recommended to validate the IBAN. You can use our free IBAN validator to instantly check whether an IBAN is correctly formatted and to identify the issuing bank. We never store the IBANs you enter — your data remains completely private.