What is the Luxembourg IBAN format?

Luxembourg IBANs start with LU, followed by 2 check digits, then a 16-character BBAN encoding the bank code, branch code, and account number.

Is Luxembourg in SEPA?

Luxembourg is a SEPA member. Transfers from other SEPA countries are fast and low-cost.

LU SEPA Member

Luxembourg IBAN Format

Q: How long is a Luxembourg IBAN?

A Luxembourg IBAN is 20 characters long.

20-character IBAN · EUR Euro · SEPA zone

A Luxembourg IBAN is 20 characters long and always begins with the country code LU, followed by two check digits. The next 3 characters are the Bank Code. The remaining 13 characters identify the individual account number. The Luxembourg IBAN uses the EUR (Euro) and is a <strong>SEPA member</strong>, meaning euro transfers from other SEPA countries are fast and low-cost.

Length

characters

Country Code

ISO 3166-1

Currency

EUR

Euro

SEPA

Yes

SEPA member

Example IBAN

LU28 0019 4006 4475 0000

LU Country

28 Check Digits

001 Bank Code

9400644750000 Account Number

IBAN Structure

Position	Length	Field	Type	Example Value
1–2	2	Country Code	a	LU
3–4	2	Check Digits	n	28
5–7	3	Bank Code	n	001
8–20	13	Account Number	c	9400644750000

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

Validate a Luxembourg IBAN

Paste a Luxembourg IBAN below to check it.

Luxembourg IBAN Regex Pattern

^LU\d{2}\d{3}[A-Z0-9]{13}$

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(' ', '', $input));
if (!preg_match('/^LU\\d{2}\\d{3}[A-Z0-9]{13}$/', $iban)) {
    // Invalid Luxembourg IBAN format
}

JavaScript

const iban = input.replace(/\s+/g, '').toUpperCase();
const pattern = /^LU\d{2}\d{3}[A-Z0-9]{13}$/;
if (!pattern.test(iban)) {
  // Invalid Luxembourg IBAN format
}

Python

import re
iban = input_str.replace(' ', '').upper()
pattern = r'^LU\d{2}\d{3}[A-Z0-9]{13}$'
if not re.fullmatch(pattern, iban):
    # Invalid Luxembourg 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 Luxembourg IBAN

Luxembourg accounts are traditionally identified using: Bank Code (3n) + Account Number (13c). 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 Luxembourg 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 Luxembourg 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 Luxembourg

Luxembourg is a SEPA member. From any other SEPA country, you only need the recipient's IBAN — no BIC/SWIFT required. Transfers settle within 1 business day (or instantly via SEPA Instant Credit Transfer). Fees cannot exceed what your bank charges for a domestic payment.

What to provide

Recipient's full name
IBAN (20 characters, starts with LU)

Typical transfer time

0–1 day

SEPA Credit Transfer (1 day) or SEPA Instant (<10 seconds if both banks support it)

Luxembourg is a SEPA member using the Euro. IBAN alone is sufficient for SEPA transfers. Luxembourg is a major financial centre; its banks include many private banking and investment institutions.

Compare transfer services for Luxembourg

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

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

Central Bank

Banque centrale du Luxembourg

https://www.bcl.lu ↗

← Lithuania Malta →

Quick Facts

IBAN Length: 20 chars
Country Code: LU
Currency: EUR
SEPA: Yes
BBAN Format: 3n13c
IBAN Required: mandatory
Adopted: 2001