What is an IBAN and When Do I Need One?

D

Daniel Zhang

Last updated on Aug 17, 2026

What is an IBAN?

IBAN stands for International Bank Account Number. It is a standardized format for identifying bank accounts across international borders, originally developed by the European Committee for Banking Standards (ECBS) and now maintained as an international standard under ISO 13616.

An IBAN is not limited to the euro zone. It is used in more than 80 countries and territories worldwide, including many European countries (such as the UK, Switzerland, and Norway, which are not in the euro zone) as well as countries in the Middle East and other regions.

Why is an IBAN important?

When you send an international wire transfer, the SWIFT network uses the IBAN to automatically identify the destination country and beneficiary bank. Because this information is embedded in the IBAN's structure, the payment can be routed quickly and accurately without manual intervention.

If a domestic or local account number is provided instead of an IBAN for a country that requires one, the SWIFT system cannot automatically route the payment. The transfer may be delayed while bank staff manually verify the destination country and bank. In addition, intermediary banks may charge additional processing fees, increasing the overall cost of the transfer.

IBAN vs. domestic account number

An IBAN is a type of bank account number, but it follows a specific international format that includes a country code, check digits, and the domestic bank account details. Countries that have adopted the IBAN standard use it for both international and, in many cases, domestic transfers.

Countries that have not adopted the IBAN standard rely on a domestic account number together with the bank's SWIFT/BIC code to process international transfers.

Suggestions

  • Before sending money internationally, ask the recipient whether their country uses the IBAN system. If it does, always request and use their IBAN.
  • If the recipient's country does not use IBAN, provide the standard domestic account number along with the bank's SWIFT/BIC code.
  • When in doubt, contact your bank or the recipient's bank to confirm the correct account details. Providing the right information the first time helps avoid delays and extra fees.