What is the São Tomé and Príncipe IBAN format?

São Tomé and Príncipe IBANs start with ST, followed by 2 check digits, then a 21-character BBAN encoding the bank code, branch code, and account number.

Is São Tomé and Príncipe in SEPA?

São Tomé and Príncipe is not a SEPA member. International transfer fees and timelines apply.

São Tomé and Príncipe IBAN Format

Q: How long is a São Tomé and Príncipe IBAN?

A São Tomé and Príncipe IBAN is 25 characters long.

25-character IBAN · STN São Tomé and Príncipe Dobra

A São Tomé and Príncipe IBAN is 25 characters long and always begins with the country code ST, followed by two check digits. The next 4 characters are the Bank Code. This is followed by the Branch Code (4 characters). The remaining 11 characters identify the individual account number. The São Tomé and Príncipe IBAN uses the STN (São Tomé and Príncipe Dobra) and is not part of the SEPA zone, so international transfer fees and timelines apply.

Length

characters

Country Code

ISO 3166-1

Currency

STN

São Tomé and Príncipe Dobra

SEPA

Non-SEPA

Example IBAN

ST68 0001 0001 0051 8453 1011 2

ST Country

68 Check Digits

0001 Bank Code

0001 Branch Code

00518453101 Account Number

12 National Check Digits

IBAN Structure

Position	Length	Field	Type	Example Value
1–2	2	Country Code	a	ST
3–4	2	Check Digits	n	68
5–8	4	Bank Code	n	0001
9–12	4	Branch Code	n	0001
13–23	11	Account Number	n	00518453101
24–25	2	National Check Digits	n	12

n = numeric only (0–9) a = alphabetic only (A–Z) c = alphanumeric (0–9, A–Z)

Validate a São Tomé and Príncipe IBAN

Paste a São Tomé and Príncipe IBAN below to check it.

São Tomé and Príncipe IBAN Regex Pattern

^ST\d{2}\d{4}\d{4}\d{11}\d{2}$

Pattern validates length, country code, check digit positions, and field character types. Does not verify the MOD-97 checksum (use the validator above for full validation).

PHP

$iban = strtoupper(str_replace(' ', '', $input));
if (!preg_match('/^ST\\d{2}\\d{4}\\d{4}\\d{11}\\d{2}$/', $iban)) {
    // Invalid São Tomé and Príncipe IBAN format
}

JavaScript

const iban = input.replace(/\s+/g, '').toUpperCase();
const pattern = /^ST\d{2}\d{4}\d{4}\d{11}\d{2}$/;
if (!pattern.test(iban)) {
  // Invalid São Tomé and Príncipe IBAN format
}

Python

import re
iban = input_str.replace(' ', '').upper()
pattern = r'^ST\d{2}\d{4}\d{4}\d{11}\d{2}$'
if not re.fullmatch(pattern, iban):
    # Invalid São Tomé and Príncipe IBAN format

These snippets check format only. For full IBAN validation including MOD-97 checksum, use a dedicated IBAN library or the validator on this page.

How to Find Your São Tomé and Príncipe IBAN

São Tomé and Príncipe accounts are traditionally identified using: Bank Code (4n) + Branch Code (4n) + Account Number (11n) + Check Digit (2n). Your IBAN encodes these same components in the standardised international format.

1
Mobile banking app — Open your bank's app, navigate to account details or "Account Info." Your IBAN is usually displayed alongside your account number. Look for a field labelled "IBAN" or "International Account Number."
2
Bank statement — Your São Tomé and Príncipe IBAN appears in the account header of your printed or PDF bank statement, typically near the top of the first page.
3
Online banking — Log in to your bank's website and go to "Account Details," "Account Summary," or "Profile." Most São Tomé and Príncipe banks display the IBAN prominently in account settings.
4
Bank branch or helpline — Call your bank's customer service or visit a branch with your ID. They can provide your full IBAN instantly.

Once you have your IBAN, use the validator above to confirm it is correctly formatted before sharing it.

Sending Money to São Tomé and Príncipe

São Tomé and Príncipe is not a SEPA member. Transfers require both an IBAN and a BIC/SWIFT code. Expect 2–5 business days and a SWIFT correspondent fee (typically $10–$40 USD via a traditional bank). Using a specialist service like Wise or Revolut can significantly reduce these fees.

What to provide

Recipient's full name
IBAN (25 characters, starts with ST)
BIC / SWIFT code
Recipient's bank address (some banks)

Typical transfer time

2–5 days

Via SWIFT network. Specialist services (Wise, Revolut) are often faster and cheaper than traditional bank wires.

São Tomé and Príncipe adopted IBAN in 2010. Not SEPA. Always include BIC. Uses STN (São Tomé and Príncipe Dobra) since 2018.

Compare transfer services for São Tomé and Príncipe

Specialist services typically charge significantly less than high-street banks for international transfers.

Wise — Low fees, real exchange rate ↗ Revolut — Fast transfers ↗

Central Bank

Banco Central de São Tomé e Príncipe

https://www.bcstp.st ↗

← Switzerland Tunisia →

Quick Facts

IBAN Length: 25 chars
Country Code: ST
Currency: STN
SEPA: No
BBAN Format: 21n
IBAN Required: mandatory
Adopted: 2010