IBAN example · LU
Luxembourg IBAN example
This page gives you a sample Luxembourg IBAN that passes all ISO 13616 checks — correct character set, exactly 20 characters, and MOD 97 check digits that yield a remainder of 1. This Luxembourg IBAN is a synthetic test value for forms and integrations, not a real account. Use it for payment-integration tests, form demos, or to learn how a LU IBAN is structured. It does not map to a real bank account, so never send money to it. Below you will find the full IBAN, a field-by-field breakdown, notes on testing, and the SWIFT/BIC code you would pair with it for a complete cross-border payload.
Field-by-field breakdown
The breakdown below splits the sample Luxembourg IBAN (LU77012ABCD1234EFGH5) into its country code, check digits, and BBAN fields, applying the 3!n13!c pattern so each field is labeled with its length and allowed characters. This is the same field-by-field view the IBAN validator produces for any LU IBAN you paste, so you can compare a real Luxembourg IBAN against this reference structure.
How to use this Luxembourg IBAN example
A common use case is testing a payment form that accepts Luxembourg IBANs: paste the sample into your form to confirm it accepts 20-character LU input and rejects malformed values. You can also load this example straight into the IBAN validator to see the green check, or open the Luxembourg IBAN format page for the full structure spec. For end-to-end testing of a cross-border flow, pair this IBAN with the receiving bank's SWIFT/BIC code.
Reading the Luxembourg IBAN structure
Reading the sample Luxembourg IBAN left to right: the first two characters (LU) are the ISO 3166 country code for Luxembourg; the next two are the MOD 97 check digits, chosen so the whole number passes the checksum; and the remaining 16 characters are the BBAN, which encodes the bank and account under Luxembourg's national format. Because the BBAN layout is fixed for Luxembourg, you can predict which characters are the bank code and which are the account number just from the 3!n13!c pattern — and that is exactly what the field-by-field breakdown below shows.
Testing with this Luxembourg IBAN
For QA and integration work, this Luxembourg IBAN example is most useful in three places. In a payment form, paste it to confirm the field accepts 20-character LU input and rejects values that are too short, too long, or have a bad country prefix. In a MOD 97 unit test, assert that the example returns a remainder of 1 and that flipping any single digit makes it fail. In an end-to-end test, pair the IBAN with a Luxembourg SWIFT/BIC code so the full wire payload looks realistic. Because the example is synthetic, it will never collide with a real Luxembourg account, which makes it safe to commit to test fixtures.
Luxembourg IBAN example and SWIFT codes
If you are testing a full international payment into Luxembourg, you will usually need a SWIFT/BIC code alongside this IBAN. Look up the receiving Luxembourg bank's BIC with a SWIFT code lookup tool to build a realistic LU wire payload around this Luxembourg IBAN.
Luxembourg IBAN example FAQ
- Is this Luxembourg IBAN example real?
- No. It is a synthetic value generated to pass MOD 97 and the 20-character LU length check. It does not correspond to any real Luxembourg bank account, so it is safe for test fixtures and demos but must never be used for an actual transfer.
- Why use a synthetic Luxembourg IBAN instead of a real one?
- Real Luxembourg IBANs are private account identifiers; publishing one would expose a customer's account. A MOD 97-valid synthetic example gives you the same format and checksum behavior for testing without touching any real account.
- Can I load this LU example into the validator?
- Yes. The "Validate this example" link below loads this sample straight into the IBAN validator so you can see the green check and the full breakdown, exactly as a real Luxembourg IBAN would render.
- What do I pair with a Luxembourg IBAN for a wire?
- For most cross-border payments into Luxembourg you need the IBAN plus the receiving bank's SWIFT/BIC code. This Luxembourg IBAN example covers the account side; look up the bank's BIC separately to complete the wire instructions.