Portugal IBAN calculator and checker

A Portuguese IBAN has 25 characters: PT, two check digits, then the bank code, branch code (balcão), account number and NIB control digits. Enter the local details to build one, or paste an IBAN to check it, all in your browser.

Calculate or check a Portuguese IBAN

Enter the bank code, branch code (balcão), account number and NIB control digits. The calculator pads short numbers with zeros, works out any national check digits you leave empty and adds the two IBAN check digits.

Switch to Check to paste an IBAN instead: it tests the length, characters, check digits and national check, and shows the bank, branch and account parts. Nothing you type leaves the page.

PT IBAN format

A Portuguese IBAN is 25 characters: PT, two check digits, then the bank code, branch code (balcão), account number and NIB control digits.

In the printed format, k marks the check digits, a and b the bank, s the branch, sort code or prefix, c the account number and x a national check character.

IBAN length
25 characters
Check digits
2 digits after PT
Bank code
4 digits
Branch code (balcão)
4 digits
Account number
11 digits
NIB control digits
2 digits
National check digit
Last 2 digits of the NIB, ISO 7064 mod 97-10
SEPA
Yes, EU member
Printed format
PTkk bbbb ssss cccc cccc cccx x
Example IBAN
PT50 0002 0123 1234 5678 9015 4

Frequently asked questions

  • 25 characters: PT, two check digits, then the bank code, branch code (balcão), account number and NIB control digits. Printed in groups of four, it looks like PT50 0002 0123 1234 5678 9015 4.

  • The 21-digit NIB (bank, branch, account and two control digits) ends with mod 97-10 control digits over the rest of it. That fixes the remainder the IBAN check digits are calculated from, so every valid Portuguese IBAN is PT50 followed by the NIB.

  • Yes. Portugal is an EU member state, so it is in SEPA: euro payments to a Portuguese IBAN can go by SEPA credit transfer.

  • With the ISO 7064 mod 97-10 algorithm. The bank code, branch code (balcão), account number and NIB control digits and the country code PT are turned into digits, and the two check digits are chosen so the whole number leaves a remainder of 1 when divided by 97. The calculator does this for you and rejects any input that cannot make a valid PT IBAN.

  • Yes. The calculator and the checker run entirely in your browser: the details you enter are never sent to a server, stored or shared. There is no sign-up and no fee.

  • Yes. The calculator covers 41 countries and the checker all 89 in the SWIFT IBAN registry. Pick a different country in the form above, or open its page from the list below.

Paying an IBAN from stablecoins? Holyheld Business converts USDC to EUR and pays it out by SEPA. See pricing or the guide to off-ramping USDC to an IBAN.

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