How do I convert a Dutch bank account number to IBAN?

To convert a Dutch account number to IBAN: (1) Identify your bank's 4-letter SWIFT code (e.g. ABNA for ABN AMRO, INGB for ING, RABO for Rabobank). (2) Pad the account number to 10 digits. (3) Combine: NL + 2 check digits (MOD-97) + bank code + account number. Dutch IBANs are 18 characters long.

How long is a Dutch IBAN?

A Dutch IBAN (NL) is exactly 18 characters long: NL (2) + check digits (2) + bank code (4) + account number (10) = 18 characters.

Which Dutch banks are supported?

Supported Dutch bank codes include ABNA (ABN AMRO), INGB (ING Bank), RABO (Rabobank), TRIO (Triodos), BUNQ (bunq), SNSB (SNS Bank), and ASNB (ASN Bank), among others.

What does "rekeningnummer naar IBAN omrekenen" mean?

It is Dutch for converting a bank account number to an IBAN. Rekeningnummer (also bankrekeningnummer or banknummer) is the domestic account number; omrekenen, omzetten and converteren all mean converting it. The result is an 18-character NL IBAN that adds the 4-letter bank code and two MOD-97 check digits.

Is the Netherlands part of SEPA?

Yes, the Netherlands is a SEPA member. Euro transfers within the SEPA zone can be sent as low-cost SEPA Credit Transfers using the Dutch IBAN, with no SWIFT fees required.

Dutch Bank Account to IBAN Converter

Enter your Dutch bank account number (rekeningnummer) and your bank to generate a valid NL IBAN instantly. Free, no registration required.

Bank Code

Account Number (up to 10 digits)

Shorter account numbers are automatically zero-padded to 10 digits.

Common Dutch bank codes

Code	Bank
ABNA	ABN AMRO
INGB	ING Bank
RABO	Rabobank
TRIO	Triodos Bank
SNSB	SNS Bank
ASNB	ASN Bank
KNAB	Knab
BUNQ	bunq

If your bank is not listed, check your bank statement or online banking for the 4-letter bank code.

What Is a Rekeningnummer (Dutch Account Number)?

Dutch bank account numbers (rekeningnummers) are up to 10 digits long. Before the SEPA migration in 2014, Dutch domestic payments used the account number alone together with a 4-letter bank code. Today, all Dutch payments, domestic and international, require an IBAN.

If your account number has fewer than 10 digits, it is automatically zero-padded from the left when constructing the IBAN. For example, account 417164300 (9 digits) becomes 0417164300 in the IBAN.

Netherlands IBAN Format

A Dutch IBAN is always 18 characters long:

NL kk BBBB AAAAAAAAAA

NL         = country code (Netherlands)
kk         = 2 check digits (MOD-97 algorithm)
BBBB       = 4-letter bank code (e.g. ABNA, INGB, RABO)
AAAAAAAAAA = 10-digit account number (zero-padded)

Example: NL91 ABNA 0417 1643 00

NL: Netherlands
91: check digits
ABNA: ABN AMRO bank code
0417164300: 10-digit account number

Why Does the Bank Code Matter?

Unlike Germany (where the BLZ identifies the branch) or the UK (where the sort code maps to a bank code), Dutch IBANs embed a 4-letter bank identifier directly. ABNA identifies ABN AMRO, INGB identifies ING, and RABO identifies Rabobank. The same account number at a different bank produces a completely different IBAN.

If your bank is not in the dropdown, check your bank statement or online banking for the 4-letter bank code (it always appears at positions 5–8 of your IBAN). Once you have generated your NL IBAN, verify it with the ibanchecker.cash IBAN checker.

Omrekenen, Omzetten, Converteren: The Dutch Words for This

Dutch uses several words for the same account number and the same conversion, which is why searches for this look so different from one another. Your domestic account number is a rekeningnummer, also written bankrekeningnummer or banknummer. Turning it into an IBAN is called omrekenen, omzetten, or converteren naar IBAN. They all describe one operation, the one this page performs.

The old pre-2014 formats have the same names. A 9-digit bankrekeningnummer and a 7-digit ING girorekening both become an 18-character NL IBAN once the bank code is added and the number is padded to 10 digits, which the converter above does for you.

Last updated: September 2026