IBAN
The International Bank Account Number, a standardized account identifier used in much of the world to route cross-border bank payments accurately.
Definition
An IBAN, or International Bank Account Number, is a standardized way of writing a bank account identifier so that cross-border payments route correctly. It starts with a two-letter country code and two check digits, followed by the domestic bank and account details, and can run up to 34 characters, for example DE89 3704 0044 0532 0130 00 for a German account. The built-in check digits let systems catch typos before any money moves.
More than 80 countries use IBANs, including all of Europe, but the US does not issue them; American accounts are identified by routing and account numbers instead. When a European client asks for your IBAN, what you actually provide is your account number, routing number, and your bank's SWIFT/BIC code, or the local-format account details from a multi-currency account, which can include a genuine European IBAN that receives euros for you.
Why It Matters
If you invoice internationally, IBAN fluency prevents the most common cross-border payment failure: misrouted or rejected transfers, which can take days to bounce back and often shed intermediary fees along the way. Putting precise, correctly formatted bank details on your invoice, IBAN where you have one, SWIFT details where you do not, gets you paid right the first time.
There is a cost angle too. A European client paying a US account by SWIFT wire pays more in fees and FX spread than one sending a local SEPA transfer to an IBAN. Holding an IBAN through a multi-currency account lets EU clients pay you like a local, often saving 2% to 4% per invoice between wire fees and conversion.
Examples
- 1
A US freelancer opens a multi-currency account with a European IBAN; her French client pays a EUR 6,000 invoice as a free SEPA transfer instead of a $45 SWIFT wire.
- 2
A payment to a Spanish contractor bounces after two days because one IBAN character was wrong; the check digits flagged it before funds left.
- 3
A UK agency prints its IBAN and BIC on every invoice footer so EU clients can pay without emailing to ask for bank details.
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