Luxembourg IBAN Format
Luxembourg IBANs are 20 characters and start with LU. Paste one below to check its length and MOD-97 checksum.
Enter an IBAN to check its country, length and MOD-97 checksum.
Note This checks that the IBAN is well-formed — correct country, correct length and a valid checksum. It cannot confirm that the account actually exists or belongs to a particular person. Always confirm payment details with the recipient.
How a Luxembourg IBAN is built
LuxembourgIBAN & VAT reference
| Country code | LU |
|---|---|
| IBAN length | 20 characters |
| Example | LU28 0019 4006 4475 0000 |
| SEPA member | Yes |
| VAT prefix | LU |
| VAT / tax number | LU + 8 digits |
How to check a Luxembourg IBAN
- 01 Paste the IBAN into the box above — spaces and lower-case are fine, they are normalised for you.
- 02 The checker confirms it starts with LU, is 20 characters, and passes the MOD-97 checksum.
- 03 A valid IBAN is shown formatted in groups of four; any failed check is called out so you know what to fix.
Frequently asked questions
What is the IBAN format for Luxembourg?
A Luxembourg IBAN is 20 characters long. It starts with the country code "LU", followed by 2 check digits and the BBAN — 3-digit bank code + 13-char account number. Example structure: LU28 0019 4006 4475 0000 (a sample, not a real account).
How long is a Luxembourg IBAN?
Exactly 20 characters, including the "LU" country code and the 2 check digits. This length is fixed by the ISO 13616 registry and is the same for every Luxembourg bank.
What is the VAT number format for Luxembourg?
Luxembourg VAT numbers use the prefix "LU": LU + 8 digits. The VAT number is separate from the IBAN — one identifies the business for tax, the other identifies the bank account.
Does this Luxembourg IBAN checker upload my data?
No. The validator checks the country code, the 20-character length and the MOD-97 checksum entirely in your browser. Nothing you paste is sent anywhere.