Is a written employment contract required in Luxembourg?

Form and delivery requirements

The contract is drawn up in duplicate — one copy for the employer and one for the employee. It may be transmitted:

• in paper format;
• in electronic format, provided the employee can access, save and print it, and the employer retains proof of transmission or receipt (Art. L. 121-4, §1).

The contract must include a number of mandatory clauses (identity of the parties, place of work, remuneration, working time, leave, notice periods, etc.). For the full list, see the guide Mandatory clauses in an employment contract in Luxembourg.

Information deadlines

If not all information has been provided at the time of hiring, it must be communicated within the following deadlines (Art. L. 121-4, §2):

• Within 7 calendar days from the 1^st day of work: essential contract elements (remuneration, place of work, nature of the job, working time, probationary period).
• Within 1 month: additional information relating to leave, the termination procedure and social protection.

Consequences of the absence of a written contract

The absence of a written contract does not invalidate the employment relationship, but it triggers several significant legal consequences.

Proof of the contract by any means

In the absence of a written contract, the employee may establish the existence and content of their employment contract by any means of proof, regardless of the amount in dispute (Art. L. 121-4, §5).

Reclassification of a fixed-term contract as permanent

For a fixed-term contract, the absence of a written document — or the absence of a clause expressly specifying the fixed term — gives rise to a presumption that the contract is permanent. No evidence to the contrary is admissible (Art. L. 122-2, §2).

Invalidity of the probationary period clause

A probationary period clause must be expressly agreed in writing, failing which it is null and void. Without a written clause, the contract is deemed to have been concluded as a permanent contract without a probationary period, and no evidence to the contrary is admissible (Art. L. 121-5, §1).

Judicial recourse in case of non-compliance

If the employer fails to provide the mandatory information after a formal notice that remains unacted upon for 15 days, the employee may apply to the president of the labour court to order the employer to comply, potentially subject to a daily penalty (Art. L. 121-4, §2).

Refusal to sign the written contract

If one party refuses to sign the written contract, the other may terminate it without notice or compensation, subject to the following cumulative conditions (Art. L. 121-4, §6):

• termination takes place no earlier than the 3^rd day after the request to sign;
• it takes place within 30 days of commencement of employment.