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IBAN Structure Luxembourg

Last reviewed: · Source: ISO 13616 / SWIFT IBAN Registry

Luxembourg's IBAN has 20 characters in the format LUkk BBBC CCCC CCCC CCCC. After LU and two check digits come a 3-digit bank code (e.g. 002 for BIL, 005 for BCEE, 008 for ING Luxembourg) and the 13-character account identifier. Luxembourg is a euro member and an important financial centre within SEPA — many international funds and banks are based here. For payments from EU/EEA banks to Luxembourg, required routing details depend on the bank, currency and route; check them in advance with your bank.

Structural fields are based on the official SWIFT IBAN Registry. The editorial method and validation boundary are documented on our German editorial page (German).

Overview

CountryLuxembourg (LU)
IBAN length20 characters
FormatLUkk BBBC CCCC CCCC CCCC

Visual breakdown

Fictitious format example, not payment data:

LU280019400644750000
Country codeCheck digitsBank codeAccount number

Character-by-character explanation

SegmentCharactersLengthExplanation
Country codeLU2LU for Luxembourg (ISO 3166-1)
Check digits282Two check digits per MOD-97
Bank code00133-digit bank code (e.g. 002, 005, 008)
Account number94006447500001313-character account identifier

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Frequently asked questions

How do I check the length of an IBAN from Luxembourg?
Remove spaces and count 20 characters. The first two characters are LU; the remaining positions follow LUkk BBBC CCCC CCCC CCCC. A different length is formally invalid for this country format.
What do the check digits in a Luxembourg IBAN mean?
The two check digits are calculated from the complete IBAN using ISO 7064 MOD-97. They help detect format and transcription errors. A passing checksum does not confirm that an account exists or identify its account holder.
What should I do when an IBAN is formally invalid?
Check the country code, character count, letters and digits, and the check digits. Compare the entry with your bank records or ask the bank for the correct IBAN. This checker validates structure and checksum; it does not verify account ownership or payment approval.

IBAN structure for other countries

Germany

22 characters · DEkk BBBB BBBB CCCC CCCC CC

Austria

20 characters · ATkk BBBB BCCC CCCC CCCC

Switzerland

21 characters · CHkk BBBB BCCC CCCC CCCC C

Liechtenstein

21 characters · LIkk BBBB BCCC CCCC CCCC C

France

27 characters · FRkk BBBB BGGG GGCC CCCC CCCC CKK

Spain

24 characters · ESkk BBBB GGGG KKCC CCCC CCCC

Italy

27 characters · ITkk XBBB BBGG GGGC CCCC CCCC CCC

Portugal

25 characters · PTkk BBBB SSSS CCCC CCCC CCCK K