Non-compete clause in the sale of a business: validity, scope and penalties

Taking over a business (fonds de commerce) rests on a simple bet: the buyer pays for the customer base attached to that business. If the seller reopens three streets away and wins back its former customers, the buyer has paid for an asset emptied of its substance. The non-compete clause is the contractual tool that locks in this risk, but it is valid only on strict conditions, and its breach opens quick and effective remedies. This guide sets out the validity of a post-sale non-compete clause, the often neglected question of the statutory warranty that exists even without a clause, the cases of waiver, and above all what the buyer can concretely do when the seller sets up again in breach of its undertaking.

Why a non-compete clause in the sale of a business

The sale of a business (cession de fonds de commerce) transfers a set of tangible items (equipment, stock, fittings) and intangible items, foremost among them the customer base and goodwill, the trade name, the shop sign and the leasehold right (droit au bail). The economic value is almost always concentrated in the intangible: it is the customer base that sets the price.

Yet this customer base is fragile. It often remains tied to the person of the seller, to its reputation, its know-how and its personal relationships with customers and suppliers. A baker known to a whole neighbourhood, an accounting firm whose clients follow the founding partner, a garage whose reputation rests on the workshop manager: in all these cases, the customer base risks leaving with the seller if it sets up again nearby.

The non-compete clause in the sale of a business therefore organises the prohibition on the seller setting up again in a competing activity, for a determined period and within a determined area. It secures the buyer's investment by guaranteeing that it will actually enjoy the customer base it has paid for.

The essential distinction from the clause in an employment contract

A frequent confusion must be set aside at the outset. The non-compete clause in employment law is subject to a specific regime: it must in particular include financial consideration for the employee, failing which it is void. This requirement of consideration does not exist in the sale of a business. The conditions of validity specific to the employee's undertaking are set out in our article on the non-compete clause in the employment contract.

Here, the logic is the reverse. The consideration for the seller's undertaking is the sale price itself. The seller was paid to transfer its customer base; it is therefore normal that it refrains from taking it back. No additional payment has to be made for the non-compete clause on a sale to take effect. It is a difference in kind that governs the whole applicable regime.

The statutory warranty against eviction: protection even without a clause

Even before drafting a clause, the buyer has a statutory protection that many overlook. The seller of a business is bound by a warranty against eviction arising from its own act (garantie d'éviction du fait personnel), pursuant to Article 1628 of the French Civil Code.

Even where it is stipulated that the seller shall be subject to no warranty, it remains bound by that which results from an act personal to it: any agreement to the contrary is void.

This warranty prohibits the seller from committing any act liable to divert the customer base it has sold. In concrete terms, even in the absence of any stipulation, a seller that sets up again immediately next to its former business and approaches its former customers breaches the warranty against eviction. The case law has long accepted that the seller cannot take back the thing it has delivered, in this case the customer base.

The value of this warranty is twofold. On the one hand, it operates by default where the contract is silent. On the other hand, it is a matter of public policy in principle: the contract cannot entirely exonerate the seller from the warranty for its own act.

Why a clause remains indispensable

If the statutory warranty exists, why stipulate a clause? Because the warranty against eviction is imprecise. It prohibits characterised acts of diversion, but it fixes neither a duration, nor a geographical area, nor a clear definition of the prohibited activities. Its application rests entirely on the court's case-by-case assessment, which generates uncertainty and litigation.

The contractual non-compete clause clarifies and reinforces this protection. It turns a general and vague obligation into a prohibition that is quantified, dated and mapped. It considerably facilitates proof of the breach and the calculation of the loss. In practice, a well-drafted clause removes the need to debate the scope of the statutory warranty: it is enough to establish that the defined area has been crossed.

The conditions of validity of the clause

A non-compete clause restricts the freedom to undertake and the freedom of trade and industry, principles of constitutional value. It is therefore valid only if it remains proportionate to the legitimate interest it protects. The courts systematically check three limitations, assessed as a whole.

The limitation in time

The clause must be limited in time. A perpetual prohibition is void. The admissible duration is assessed in light of the sector of activity and the time the buyer needs to build lasting loyalty among the transferred customer base.

There is no single statutory duration. A prohibition of a few years is frequently held reasonable, in particular in retail businesses where loyalty is built quickly. A longer duration may be justified for activities where the customer relationship is slower to form, such as certain technical services. Conversely, a manifestly excessive duration exposes the clause to annulment or to judicial reduction.

The limitation in space

The clause must delimit a geographical area. That area must correspond to the real catchment area of the business, that is, the area from which the customer base actually comes.

For a local shop, a radius of a few kilometres or the boundary of a municipality may suffice. For an activity with regional or national reach, a wider area is justified. The decisive criterion remains consistency between the extent of the prohibition and the commercial location of the business sold. A prohibition covering the entire national territory for a neighbourhood hairdressing salon would be disproportionate and therefore liable to annulment.

The limitation as to activity

The clause must target a specific activity, that of the business sold or a similar competing activity. It cannot prohibit the seller from carrying on any commercial activity, which would amount to prohibiting it from working.

Drafting this aspect is delicate. A definition that is too narrow leaves the seller room to get around it: it will carry on a neighbouring activity not expressly covered. A definition that is too broad risks annulment for excessive interference with the freedom to work. Good practice consists of describing the prohibited activity precisely by reference to the real nature of the business, including related activities that would capture the same customer base.

The overall assessment and the fate of an excessive clause

The three limitations are not examined in isolation but in combination. A long duration may be offset by a restricted area, and vice versa. The court looks for an overall balance between the protection of the buyer and the freedom of the seller.

Where the clause exceeds what is necessary, the trend in the case law is not systematically outright annulment. The courts accept reducing the scope of the clause, for example by bringing an excessive duration or area back to acceptable limits, in order to preserve the undertaking to the extent that it remains proportionate. This power of reduction partially secures the buyer, but it obviously does not dispense with rigorous drafting from the outset.

The practical drafting of the clause

An effective clause anticipates avoidance strategies. Several points deserve particular attention when drafting the deed of sale.

The first concerns the persons covered. The clause must apply not only to the seller as an individual but also, where relevant, to persons who could serve as a front: setting up again through a spouse, a relative, or a company created for the purpose. A well-built clause extends the prohibition to direct or indirect activity, in one's own name or through an intermediary, as manager, partner, employee or mere lender of a shop sign.

The second point concerns the exact object of the prohibition. It should be specified that what is prohibited is not only the operation of a competing business, but also the active solicitation of the transferred customers and suppliers, as well as the poaching of the staff taken over. These behaviours cause direct loss even in the absence of a formal re-establishment. The distinction between a prohibition on competing and a prohibition on soliciting customers or employees is analysed in our article on the non-solicitation clause in B2B commercial contracts.

The third point is the penalty clause (clause pénale). It is strongly recommended to attach to the non-compete obligation a penalty clause fixing in advance the amount due in the event of breach. This stipulation has a twofold advantage: it relieves the buyer of the burden of providing detailed proof of its loss, which is often hard to quantify, and it has a deterrent effect on the seller. The court nevertheless retains the power to moderate a manifestly excessive penalty clause or to increase it if it is derisory, pursuant to Article 1231-5 of the French Civil Code. The operation of this stipulation and the court's power of moderation are dealt with separately in our guide to the penalty clause in contracts.

Waiver of the non-compete clause

The non-compete clause is stipulated in the buyer's interest. It may therefore waive it, but this waiver of a non-compete clause is subject to precise rules that must be known to avoid unpleasant surprises.

Waiver is not presumed. It must result from a clear and unequivocal expression of the buyer's intention. The mere fact of tolerating the seller's activity for a time, or of not reacting immediately, does not amount to waiver. Prolonged passivity may nevertheless weaken the buyer's position, in particular when it subsequently seeks urgent measures, because the summary proceedings judge (juge des référés) assesses the reality of the disturbance and may find that the buyer did not regard it as serious.

Conversely, the seller sometimes asks the buyer for a waiver, for example in order to set up again before the clause expires. This waiver may be negotiated and give rise to financial consideration in favour of the buyer. It is then essential to formalise it in writing, delimiting its extent precisely: total or partial waiver, for a given area, for a determined activity. A badly framed waiver risks opening the door to the seller's competition more widely than intended.

Finally, where the buyer resells the business, the question arises of the transfer of the benefit of the clause as against the original seller. Transmission is not automatic and requires careful contractual coordination between the successive sales, which calls for particular vigilance in chain resales.

The seller breaches the clause: the buyer's remedies

This is the critical situation. The seller sets up again within the prohibited area, or approaches its former customers, and the buyer sees its customer base bleeding away. Speed of reaction is decisive, because each week of unlawful competition aggravates a loss that is hard to reverse.

Summary proceedings to stop the disturbance

The most effective weapon is summary proceedings (référé), which make it possible to obtain urgently the cessation of the competing activity without waiting for a judgment on the merits. Before the commercial court (tribunal de commerce), which has jurisdiction over disputes between traders relating to the sale of a business, the buyer may act on the basis of Article 873 of the French Code of Civil Procedure.

The president may, within the same limits, and even where there is a serious dispute, order in summary proceedings the protective measures or measures to restore the position that are required, either to prevent imminent damage or to put an end to a manifestly unlawful disturbance.

Breach of a clear non-compete clause is precisely a manifestly unlawful disturbance. The summary proceedings judge may order the immediate cessation of the competing activity, the closure of the premises in dispute, or a prohibition on soliciting the customer base. It usually attaches to these orders a penalty payment (astreinte), that is, a sum due for each day of delay, to compel the seller to comply.

The value of summary proceedings is twofold: speed, a decision being possible within a few weeks, and effectiveness, since the penalty payment makes persistence in the breach economically untenable. To maximise its chances, the buyer should build a solid body of evidence before acting: reports drawn up by a commissaire de justice (bailiff, formerly huissier), statements from diverted customers, extracts from the trade register showing the re-establishment, the seller's advertising or website.

Damages on the merits

Summary proceedings stop the disturbance but do not fully compensate the loss already suffered. For that, the buyer brings an action on the merits for compensation, on the basis of the seller's contractual liability, pursuant to Articles 1231-1 et seq. of the French Civil Code.

The compensable loss includes the loss of customers and the corresponding loss of profit, the fall in value of the business acquired, and where applicable the costs incurred in trying to win the customer base back. Proving it requires rigorous accounting work: comparison of turnover before and after the breach, analysis of the lost margin, expert evidence if necessary.

This is where the penalty clause comes into its own. Where one has been stipulated, the buyer may claim the lump sum provided for without having to prove the detail of its loss. Failing that, it must establish precisely the extent of the damage, which lengthens and complicates the litigation.

The interplay with the warranty against eviction

Where the deed contains no clause, or where the seller's conduct goes beyond the scope of the clause stipulated, the buyer always retains the remedy based on the statutory warranty against eviction in Article 1628 of the French Civil Code. This independent basis makes it possible to penalise any act of personal diversion by the seller, including beyond the strict contractual provisions. In practice, it is common to invoke cumulatively the breach of the clause and the breach of the warranty against eviction, to cover all configurations.

What to remember and how to secure the transaction

The non-compete clause is not a stylistic formula to be copied from a template: it is the economic lock of the sale. A buyer that neglects its drafting pays for a customer base that it risks never actually owning. A seller that signs it lightly exposes itself to closure under a penalty payment and to heavy financial awards.

The position of this guide is clear. For the buyer, never rely on the statutory warranty against eviction alone: it protects, but it is too imprecise to deter effectively. A clause is needed that is precise in its three dimensions, time, space and activity, extended to intermediaries and backed by a penalty clause. For the seller, the real scope of the undertaking must be measured before signing and, if a plan to set up again exists, a written and framed waiver should be negotiated rather than taking the risk of a breach.

Before signing a deed of sale, have the non-compete clause reviewed by a French lawyer who will check its proportionality and its enforceability: a clause annulled for excess protects no better than an absent clause, and a clause that is too weak is got around. And if a seller has already set up again in breach of its undertaking, act without delay in summary proceedings: time passing turns into lost customers and weakens the demonstration of urgency.

Frequently asked questions

Is a non-compete clause mandatory in the sale of a business?

No, it is not mandatory. Even without a clause, the seller remains bound by the statutory warranty against eviction in Article 1628 of the French Civil Code, which prohibits it from diverting the customer base sold. But this warranty is imprecise as to its duration and area. A contractual clause is therefore strongly recommended in order to fix clearly the extent of the prohibition and to facilitate proof of any breach.

Must financial consideration be paid to the seller, as in employment law?

No. The requirement of financial consideration is specific to the employee's non-compete clause. In the sale of a business, the consideration for the seller's undertaking lies in the sale price it has received. No additional payment is necessary for the clause to be valid and to take effect.

What duration and geographical area are admissible?

There is no duration or area fixed by law. The clause must remain proportionate to the interest protected and correspond to the real catchment area of the business. The duration is assessed according to the time needed to build loyalty among the transferred customer base, and the area according to the zone from which that customer base actually comes. A manifestly excessive clause may be annulled or reduced by the court.

What should be done if the seller sets up again in breach of the clause?

Act quickly, in priority by an application in summary proceedings before the commercial court on the basis of Article 873 of the French Code of Civil Procedure. The court may order the immediate cessation of the competing activity under a penalty payment. The buyer may then bring an action on the merits to obtain damages, or claim the amount of the penalty clause if one was stipulated. Solid evidence must be assembled beforehand, in particular reports by a commissaire de justice.

Can waiver of the non-compete clause be inferred from the buyer's silence?

No. Waiver is not presumed and must result from a clear and unequivocal intention. The mere fact of temporarily tolerating the seller's activity does not amount to waiver. However, prolonged passivity may weaken the buyer's position in summary proceedings, because the court assesses the reality and seriousness of the disturbance alleged. Any negotiated waiver must be formalised in writing and precisely delimited.

Does the non-compete clause apply if the seller sets up again through a company or a spouse?

That depends on the drafting of the clause. A well-drafted clause expressly covers direct or indirect activity, in one's own name or through an intermediary, including through a company or a relative. If the clause is drafted too narrowly, the seller may try to get around it by an arrangement. In addition, the statutory warranty against eviction makes it possible in some cases to penalise such manoeuvres even outside the contractual provisions.

Can the non-compete clause and the statutory warranty against eviction be combined?

Yes, and it is even good practice. The clause clarifies and reinforces the protection, while the warranty against eviction in Article 1628 of the French Civil Code provides an independent basis to penalise any personal diversion by the seller, including beyond the strict scope of the clause. Invoking both bases covers the widest range of situations and secures the buyer's remedy.