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IBAN

International Bank Account Number standardizing account identification for cross-border transactions.

Payments InfrastructureGlobal Payroll

FAQs

Can I send money to a U.S. bank account using an IBAN?

No—U.S. banks do not issue IBANs. International transfers to U.S. accounts require the recipient's SWIFT/BIC code, ABA routing number (for domestic ACH/wire), and account number. When sending from Europe to the U.S., you provide the U.S. bank's SWIFT code plus the account number rather than an IBAN. Some U.S. banks have created IBAN-like formats for their own purposes, but these are not standard and may cause confusion—always confirm with the U.S. recipient what information their bank requires for incoming international wires.

How does IBAN validation work?

IBAN validation uses a modulus-97 check digit calculation. The process: rearrange the IBAN by moving the first four characters to the end, replace letters with numbers (A=10, B=11, etc.), then divide the resulting number by 97. A valid IBAN produces a remainder of 1. Payment systems validate IBANs automatically before processing, immediately rejecting IBANs with incorrect check digits. This catches most transcription errors—digit transpositions, missing characters, wrong country code—before funds are sent, dramatically reducing failed or misdirected payments compared to unvalidated account numbers.

Why hasn't the U.S. adopted IBANs?

The U.S. has not adopted IBANs primarily due to the enormous cost and complexity of converting a banking system with tens of thousands of banks, hundreds of millions of accounts, and deeply embedded legacy infrastructure to a new account numbering scheme. The U.S. Federal Reserve's domestic payment systems (Fedwire, ACH) work effectively with existing ABA routing numbers, and the U.S. financial industry has not experienced the same cross-border payment friction that prompted IBAN adoption in Europe (where dozens of countries with different banking systems needed harmonization). International payments from the U.S. use SWIFT codes for routing instead.

Related Terms

SWIFT Code

Unique identifier (BIC) for financial institutions used in international wire transfers.

SEPA

Single Euro Payments Area enabling standardized electronic payments across 36 European countries.

ISO 20022

Global financial messaging standard enabling richer, more structured payment data across institutions.

Cross-Border Payment

Financial transaction where payer and recipient are in different countries, requiring currency conversion or international routing.

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An IBAN (International Bank Account Number) is a standardized format for bank account numbers that enables automated processing of cross-border financial transactions. Defined by ISO 13616 and administered by SWIFT, an IBAN uniquely identifies both the specific bank and the individual account, consolidating routing information that previously required separate country-specific codes and account numbers.

An IBAN consists of up to 34 alphanumeric characters: a 2-letter ISO country code, a 2-digit check number (used to detect transcription errors), a bank identifier code, and the domestic account number. The total length varies by country—German IBANs are 22 characters (DE + 2 check + 18 digit BBAN); UK IBANs are 22 characters; French IBANs are 27 characters.

IBANs are mandatory for all SEPA (Single Euro Payments Area) transactions across 36 European countries. Their use has expanded to 80+ countries globally, though adoption is uneven—the U.S., Canada, and most of Latin America do not use IBANs, relying instead on ABA routing numbers/SWIFT codes and account numbers.

For businesses making or receiving payments in Europe, having and providing the correct IBAN is essential. Incorrect IBANs fail the check digit validation automatically, preventing misdirected payments—a significant improvement over legacy account number formats.

International payroll providers, accounts payable platforms, and global treasury systems must accommodate IBANs for European employees, suppliers, and counterparties while managing the diversity of non-IBAN formats in other regions.