Business law
Non-compete clause in Luxembourg: conditions of validity and proportionality
Quick answer
A non-compete clause prohibits a person from carrying on a competing activity. To be valid in Luxembourg, it must be proportionate and limited in time, place and activity. In the employment contract, the Labour Code sets strict conditions. An excessive clause risks being set aside. An employment lawyer checks its validity.
A non-compete clause prohibits the person bound by it from carrying on a competing activity during and after a contractual relationship. It is found in employment contracts, in sales of businesses or shares and in shareholders' agreements. Its validity rests everywhere on a principle of proportionality: the clause must be limited in time, in place and as to the activities concerned, and protect a legitimate interest. In the employment contract, the Labour Code sets strict conditions of validity. A disproportionate clause may be reduced or set aside. An employment lawyer assesses its validity.
In short
- Check that the clause protects a legitimate interest (clients, know-how, trade secrets).
- Ensure a time limitation that is reasonable in the light of the context.
- Define a geographical scope proportionate to the actual activity.
- Restrict the prohibition to genuinely competing activities.
- Check the conditions specific to the employment contract set by the Labour Code.
- Provide for consideration where the context requires it.
- Combine with confidentiality and non-solicitation clauses where necessary.
- Have the clause reviewed before signing the employment contract or the agreement.
| Context | Interest protected | Point to watch |
|---|---|---|
| Employment contract | Employer's clients and know-how | Strict conditions of the Labour Code |
| Sale of a business or of shares | Value of the business transferred to the buyer | Consistency with the activity sold |
| Shareholders' agreement | Company's business and know-how | Consideration if it extends beyond departure |
The non-compete clause: definition and stakes
Quick answer. A non-compete clause is a contractual provision by which a person undertakes not to carry on, for a specified period and within a specified territory, an activity that would compete with that of the other contracting party. It protects a legitimate interest: clients, know-how, trade secrets or investments.
This clause sets two principles against each other: the freedom of trade and of work, which allows everyone to earn a living, and the legitimate protection of a business against the diversion of its clients or its know-how. Luxembourg law therefore seeks a balance.
From this balance follows a central requirement: the clause must be proportionate. A prohibition that is too broad, without any serious limit, amounts to depriving the person bound by it of the possibility of working and will be held excessive. This is the common thread of any analysis of validity.
The principle of proportionality
Proportionality is the cornerstone of any non-compete clause. Three limits must be met together: a limitation in time, a limitation in place and a limitation as to the activities concerned. The prohibition cannot go beyond what is necessary to protect the legitimate interest relied on.
The limitation in time requires a reasonable duration: a perpetual or excessively long prohibition is disproportionate. The limitation in place restricts the prohibition to a territory consistent with the actual area of activity. The limitation as to activity confines the prohibition to genuinely competing activities, and not to any form of employment.
These three limits are assessed as a whole: a long duration may be acceptable if the geographical scope is narrow, and vice versa. The judge checks that, taken as a whole, the clause does not deprive the person bound by it of the ability to work. A disproportionate clause may be reduced or set aside.
The non-compete clause in the employment contract
In the employment contract, the non-compete clause is governed by strict conditions of validity set by the Labour Code. These conditions aim to protect the employee, deemed to be the weaker party, against an excessive infringement of their freedom to work after the end of the contract.
Article L.125-8 of the Labour Code makes the validity of the clause subject to several conditions: the clause must be in writing, the employee must be of age, the gross annual remuneration must be above an indexed threshold (EUR 67,641.71 since 1 June 2026), and the prohibition must be limited to 12 months after the end of the contract, to Luxembourg territory and to the employer's sector of activity. A clause that does not meet these requirements is unenforceable against the employee. As the threshold is indexed, it must be checked at the date of termination, in particular with the Labour and Mines Inspectorate (ITM).
The prohibition only takes effect, in principle, from the termination of the employment contract. While the contract is being performed, the employee is already bound by a duty of loyalty that prohibits them from competing with their employer. An employment lawyer checks that the clause complies with the legal requirements.
The clause in a sale of a business or of shares
On the sale of a business (fonds de commerce) or of shares, the non-compete clause protects the buyer: it prevents the seller from rebuilding a competing client base and thus emptying what they have just sold of its substance. Without it, the buyer would risk paying for a business whose clients the seller would immediately divert.
Here, the parties are professionals negotiating on an equal footing, and the clause is often accepted more broadly than in the employment contract. It nevertheless remains subject to the principle of proportionality: duration, territory and prohibited activities must remain consistent with the business or activity sold.
Here the clause reflects the warranty against eviction (garantie d'éviction) that the seller owes the buyer: the seller cannot take back with one hand what they have sold with the other. Precise drafting, linked to the value of the business transferred, secures the transaction for both parties.
The clause between shareholders
Between shareholders, the non-compete clause frequently appears in the shareholders' agreement or the articles of association. It prohibits a shareholder, and often the founding director, from carrying on a competing activity while they hold shares and sometimes after their departure.
This clause protects the company's business, clients and know-how against the risk that a departing shareholder diverts the activity for their own benefit. It is particularly sensitive in projects where value rests on the skills and network of the founders.
Here too, proportionality applies: a clause that is too broad risks being held excessive. Where it extends beyond the shareholder's departure, consideration may be provided for. A corporate lawyer coordinates this clause with confidentiality and non-solicitation.
The question of consideration
Consideration is compensation, often financial, paid to the person bound by the non-compete obligation for the restriction they accept. Whether it is needed depends on the context: it is not required in the same terms depending on whether the clause appears in an employment contract, a sale or a shareholders' agreement.
In a sale of a business, the consideration is generally included in the price of the sale: the seller is paid for the whole, including their undertaking not to compete. In the employment contract, Article L.125-8 of the Labour Code does not require financial consideration; the parties may nevertheless agree on it.
Providing for proportionate consideration strengthens the validity and effectiveness of the clause: it shows that the undertaking is balanced and reduces the risk of it being challenged. Whether it is needed and its amount are assessed case by case according to the applicable legal framework.
Penalties for breach
Breach of a valid non-compete clause renders the person bound by it liable. The protected party may seek the cessation of the competing activity, where relevant subject to a penalty payment (astreinte), and compensation for the loss suffered as a result of the prohibited competition.
The contract often provides for a penalty clause setting in advance the amount due in the event of breach. This clause makes compensation easier by avoiding the need to quantify the loss precisely, subject to the judge's power to reduce the amount if it is manifestly excessive.
Conversely, if the clause is held disproportionate, it may be reduced or declared unenforceable, and the party it benefits may lose all protection. Hence the value of rigorous drafting upfront, rather than a broad clause that the judge could call into question.
Drafting a valid clause: points to watch
An effective clause begins with identifying the legitimate interest to be protected: clients, know-how, trade secrets. Without a serious interest to defend, the clause loses its justification and its validity.
The three limits (time, place, activity) must then be calibrated as precisely as possible, and the specific conditions of the framework concerned must be checked, in particular those of the Labour Code where the clause concerns an employee. The clause benefits from being combined with undertakings of confidentiality and non-solicitation of clients and employees.
Finally, the way it fits with the other provisions of the employment contract or the agreement must be checked. The lawyers of Cerno Law Firm draft and secure these clauses, ensuring their proportionality and their compliance with the Luxembourg legal framework, which guarantees their real effectiveness.
| Requirement | What is required | Risk if not met |
|---|---|---|
| Legitimate interest | Protect a serious and genuine interest | Clause without justification |
| Limitation in time | Reasonable duration | Perpetual clause set aside |
| Limitation in place | Territory consistent with the activity | Scope held excessive |
| Limitation to the activity | Genuinely competing activities | Prohibition too broad |
| Overall proportionality | Not preventing the person from working | Clause reduced or unenforceable |
Depending on your profile
For employers
An employer who includes a non-compete clause must comply with the strict conditions of the Labour Code: the clause protects a legitimate interest and remains limited in time, place and activity. A clause that does not meet these requirements is unenforceable against the employee. Its validity must be checked before signing.
For employees
An employee subject to a non-compete clause may challenge its validity if it is disproportionate or does not meet the conditions of the Labour Code. The prohibition only takes effect, in principle, after the termination of the contract. An excessive clause may be reduced or set aside by the judge.
For the shareholder or seller
Between shareholders or on the sale of a business, the clause protects the clients and know-how transferred. It is often accepted more broadly than between employer and employee, but remains subject to proportionality. Consideration may be necessary where it extends beyond departure.
Official sources
Update history
- : Consideration for the clause in the employment contract clarified: Article L.125-8 of the Labour Code does not require financial compensation, and the parties may agree on it.