The Seller's Non-Compete Clause After Selling an SME: Scope, Duration and Consideration

When you sell your SME, signing the sale agreement rarely marks the end of your obligations towards the acquirer. Among the clauses that systematically accompany sale agreements in French-speaking Switzerland, the non-compete clause plays a central role. Often perceived as a constraint, it in fact reflects a legitimate contractual balance: the acquirer pays a price that includes the value of your client base, your know-how and your reputation. It is therefore natural for them to want to protect that investment. Understanding the exact scope of this clause, its legal limits and its consideration will allow you to approach the sale of your company with confidence and clarity.

What is a non-compete clause in the sale of an SME?

A non-compete clause is a contractual provision by which the seller undertakes, after the sale, not to carry on any activity competing with that of the company sold, for a set period and within a defined geographical area. It generally appears in the share purchase agreement, or in a separate agreement annexed to it.

This clause applies first and foremost to the selling owner-manager, that is, the individual who ran the company and held its shares. It may also cover other significant shareholders or key executives whose departure to a competitor would represent a real risk for the acquired business.

From the acquirer's point of view, the justification is simple and well founded: they are buying not only assets, but also a loyal client base, a network of partners and accumulated know-how. If the seller were free to immediately set up an identical business, they could take part of that client base with them, gradually strip the company sold of its value and render the investment largely illusory.

Why this clause is legitimate and almost systematic

In the context of an SME transfer, the non-compete clause is not a penalty: it is the logical counterpart of the price paid. The acquirer is not just buying a balance sheet or machinery — they are buying a relationship of trust, sometimes built over several decades with clients, suppliers and employees.

Without this protection, the seller could, the day after signing:

• Set up a new company in the same line of business;
• Directly contact the former clients of the company sold;
• Poach key employees;
• Use the know-how acquired to offer identical services at lower prices.

This is why every serious acquirer includes this clause among their essential conditions, from the preliminary stage of negotiations onwards. If you would like a better understanding of what this preliminary document contains, our article on the letter of intent (LOI) in the sale of your SME will give you a detailed overview.

The applicable Swiss legal framework

Under Swiss law, the non-compete clause in a sale agreement rests on the principle of freedom of contract, enshrined in Articles 19 and 20 of the Swiss Code of Obligations (CO). The parties are free to define their mutual obligations, provided these do not violate the law, public morals or public policy.

By analogy with Article 340a CO — which governs non-competition in employment law — the Swiss courts check that the clause meets three cumulative conditions of validity:

• Limitation in time: the clause must have a precise end date;
• Limitation in space: the geographical scope must be consistent with the actual business;
• Limitation in subject matter: only genuinely competing activities are covered;
• Proportionality: the clause must not excessively compromise the seller's economic future.

If a clause is deemed excessive, the Swiss judge has the power to reduce it to reasonable proportions rather than annul it entirely. This judicial moderation offers a form of safety net, but it is better to negotiate a balanced clause from the outset than to rely on a court decision.

Material scope: which activities are actually covered?

The material scope of the clause defines the activities prohibited to the seller after the sale. In principle, only activities that compete directly with those of the company sold are covered. A clause drafted too broadly — one that would, for example, prohibit any commercial activity in a neighbouring sector — risks being deemed disproportionate.

It is therefore essential to define precisely in the agreement:

• The business sector concerned (e.g. installation of industrial ventilation systems);
• The types of clients covered (e.g. business clients in the food industry);
• The forms of involvement prohibited: setting up a company, acquiring a significant shareholding, salaried employment with a competitor, self-employed activity, etc.

The more precise the drafting, the lower the risk of subsequent dispute. A vague clause exposes both parties to legal uncertainty that neither has any interest in fuelling.

Geographical scope: an area consistent with the reality of your SME

The geographical boundaries must reflect the actual operating radius of the SME sold at the time of the transaction. A company whose clients are exclusively within one canton does not justify a prohibition covering the whole of Switzerland or, a fortiori, neighbouring countries.

In practice, the following areas are observed depending on the nature of the business:

• Cantonal area: for local SMEs (trades, retail, personal services);
• French-speaking Switzerland: for companies whose commercial relationships extend across several French-speaking cantons;
• All of Switzerland: for companies operating throughout the national territory;
• International: only for exporting companies with an established foreign client base.

A manifestly excessive geographical area is one of the arguments most frequently raised to challenge the validity of a non-compete clause before the Swiss courts.

Duration: how long does the non-compete undertaking last?

The duration of a non-compete clause in the sale of an SME is considerably longer than in employment law, where it is generally limited to three years. In the context of a business transfer, Swiss practice most often falls between two and five years, depending on the nature of the business and the intensity of the seller's relationships with clients.

This longer duration is justified by several factors:

• The sale price includes the value of the business or the shares, which rests largely on intangible assets (client base, reputation, know-how);
• The acquirer needs time to take ownership of the commercial relationships and build client loyalty to their own management;
• The risk of the seller winning back the client base is higher than in a simple employment relationship.

Beyond five years, proportionality becomes difficult to defend legally, except in particular circumstances. A three-year term is often an acceptable balance for both parties in the case of a regional SME.

Consideration and the link with the sale price

The non-compete clause is not negotiated in a vacuum: it forms part of the overall balance of the transaction. Under Swiss law, it does not necessarily require separate financial compensation, provided it is built into the sale price — which is the most common case. The price the acquirer agrees to pay takes account, implicitly or explicitly, of the protection they obtain through this clause.

Depending on the structure of the transaction, this clause may also be combined with:

• A handover period for the seller after the sale, during which they remain involved in the transition — a phase we detail in our article on the post-sale transition period and the seller's role after signing;
• An earn-out or a vendor loan, mechanisms through which part of the price is paid on a deferred basis depending on the company's future performance — you can find out more in our article on earn-outs, vendor loans and cash payment.

In the event of a breach of the clause, the consequences can be significant: payment of proven damages, activation of a contractual penalty (penalty clause) defined beforehand in the contract, and a court injunction to cease the competing activity. These mechanisms underline the importance of taking this undertaking seriously from the moment of signing.

Preparing this clause properly and approaching the sale with a trusted counterpart

The non-compete clause is one of the most important provisions in your sale agreement. For it to be balanced and reassuring for both parties, a few common-sense principles apply:

• Read every term carefully: the subject matter, geographical area and duration must be defined without ambiguity;
• Check proportionality: the clause must match the reality of your business and not compromise your professional future;
• Anticipate scenarios: what happens if you wish to join a board of directors in an adjacent sector? If you hold passive shareholdings in another company? These situations must be clarified contractually;
• Have the clause reviewed by a lawyer specialising in business law or business transfers before signing.

At Vendre-Entreprise.ch, we act as a direct buyer. This means you have a single point of contact throughout the process, with no public listing of your company and no public exposure. From the moment you receive our letter of intent — generally delivered within 72 hours — the framework of the transaction, including the broad outlines of the proposed non-compete clause, is clearly set out. This early transparency allows you to anticipate your future obligations and calmly prepare for what comes next.

The transition to a new chapter in your professional life deserves to be approached with clarity. Understanding precisely what you are committing to — and for how long — is an essential condition for this sale to be experienced as a success, and not as a source of unforeseen constraints.

Would you like an initial idea of the value of your company before taking any steps? Use our free estimation simulator to obtain an indicative range in a few minutes. And if you would rather discuss it confidentially with one of our team, get in touch with us here — with no obligation and in complete discretion.

Disclaimer: This article is written for informational and educational purposes. It does not constitute legal advice and cannot replace consultation with a lawyer qualified in Swiss business law or business transfers. We recommend having any non-compete clause reviewed by a legal professional before signing any sale agreement.