IBAN · LU
IBAN format in Luxembourg: structure, length and example
An IBAN in Luxembourg is 20 characters long and always starts with LU. It is a SEPA country, so euro payments from other SEPA members arrive as ordinary domestic transfers. The details below come from the official IBAN registry maintained by SWIFT as registration authority for ISO 13616.
IBANs run from 15 to 33 characters worldwide, so at 20 this one sits below the average of 24. 7 other countries use the same length, which is why the two opening letters matter — they are what tells the sending bank where the money is going. There is no separate branch identifier: the number points at the bank and the account, not at a particular office. The format has been in force since April 2007.
Luxembourg IBAN at a glance
| Field | Value |
|---|---|
| IBAN country code | LU |
| IBAN length | 20 characters |
| Domestic account number length | 16 characters |
| IBAN structure | LU2!n3!n13!c |
| SEPA member | Yes |
| Example (electronic) | LU280019400644750000 |
| Example (printed) | LU28 0019 4006 4475 0000 |
How an IBAN in Luxembourg breaks down
Taking the registry's own example, LU28 0019 4006 4475 0000:
| Part | Value | What it is |
|---|---|---|
| Country code | LU | Always LU for Luxembourg |
| Check digits | 28 | Calculated from the rest of the number (ISO 7064 mod-97) |
| Bank identifier | 001 | Positions 1–3 of the domestic account number |
| Account number | 9400644750000 | Identifies the account at that bank |
Letters in the structure notation mean: n digits,
a uppercase letters, c letters or digits; ! means the length
is fixed.
How to send money to an account in Luxembourg
- Ask for the IBAN in full — including the country code at the front. Spaces do not matter; banks strip them.
- Check the name matches the account. The check digits catch typing mistakes, not wrong recipients.
- Send — and keep the reference number until the recipient confirms arrival.
Common questions
How many characters is an IBAN in Luxembourg?
20 characters, starting with the country code LU. Written on paper it is normally grouped in blocks of four, like LU28 0019 4006 4475 0000.
What does a Luxembourg IBAN look like?
LU28 0019 4006 4475 0000 is the format example published in the official IBAN registry. The first two letters are the country code, the next two are check digits, and the rest identifies the bank and the account.
Do I need a BIC as well as the IBAN for Luxembourg?
For payments inside SEPA the IBAN alone is enough. Outside SEPA, or when your bank asks for it, you also need the recipient bank's BIC/SWIFT code.
Can I check an IBAN before sending money?
The check digits let any bank detect a mistyped IBAN, but they cannot tell you whether the account belongs to the person you think. Confirm the name and the number with the recipient.
Where this data comes from
Structure, length and examples come from the official IBAN Registry published by SWIFT as registration authority for ISO 13616, snapshot of 2026-08-21. Worked examples are derived from the registry's own sample values. Whether a country is inside SEPA is taken from the European Payments Council list of countries in the SEPA schemes, not from the registry: the registry records the position at its own release date and lags behind admissions. Corrections: [email protected].
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