The contractual penalty clause (or penal clause) is a contractual stipulation by which the parties agree that the debtor will pay a determined sum in the event of non-performance, delay or defective performance of their obligations. Governed by art. 160 to 163 CO, it constitutes an essential tool for managing contractual risk in Swiss law. PBM Avocats, a law firm in Geneva and Lausanne, advises its clients on the drafting, negotiation and litigation relating to contractual penalty clauses.
Functions and Advantages of the Contractual Penalty Clause (art. 160-161 CO)
The contractual penalty clause fulfils three main functions in Swiss law:
- Incentive function: it deters the debtor from failing their obligations by imposing a predictable cost in the event of non-performance;
- Damage liquidation function: it avoids the creditor having to prove the existence and amount of damage (art. 161 para. 1 CO);
- Security function: it may be stipulated for the case of unilateral termination of the contract by one of the parties (paid right of withdrawal).
According to art. 160 CO, the penalty is due even if the creditor has suffered no damage, provided that the contractually provided conditions are met. This exemption from proving damage is one of the main practical advantages of the contractual penalty clause.
The Relationship Between the Penalty and Performance (art. 160 CO)
Art. 160 CO distinguishes two situations depending on the subject matter of the contractual penalty clause:
| Type of Clause | Relationship with Performance | Consequence |
|---|---|---|
| Penalty for total non-performance | Alternative to performance | Creditor chooses between performance and penalty (art. 160 para. 1 CO) |
| Penalty for delay or defective performance | Cumulative with performance | Performance + penalty may be claimed simultaneously (art. 160 para. 2 CO) |
| Withdrawal clause (earnest money) | Right of withdrawal against payment | Releases the debtor from performance upon payment of the penalty |
Judicial Reduction of the Contractual Penalty Clause (art. 163 para. 3 CO)
Art. 163 para. 3 CO confers on the Swiss court the power to reduce excessive penalties. This is a rule of public policy from which the parties cannot derogate. The reduction is made ex officio or at the request of the debtor. The reduction criteria retained by the Federal Supreme Court include:
- The manifest disproportion between the agreed penalty and the actual or foreseeable damage;
- The debtor's fault: slight fault or absence of fault argues in favour of reduction;
- The nature and cause of non-performance;
- The respective financial situation of the parties;
- The purpose of the clause (purely incentive or genuine estimation of damage).
Case law has notably admitted the reduction of a penalty representing several times the amount of damage actually suffered. The court may reduce it to a minimum that still constitutes a sufficient incentive to comply with the obligation.
Cumulation of the Penalty with Damages (art. 161 CO)
The contractual penalty clause does not exclude damages. If the actual damage exceeds the amount of the penalty, the creditor may claim the surplus provided they prove the debtor's fault and the additional damage (art. 161 para. 2 CO). Conversely, if the damage is less than the penalty, the penalty remains due in full, subject to judicial reduction. This asymmetry enhances predictability for the creditor, who benefits from a minimum floor of compensation without having to conduct complex accounting demonstrations.
Conditions for Validity of the Contractual Penalty Clause
To be valid, the contractual penalty clause must comply with several conditions:
- It must be expressly agreed: the contractual penalty clause is not presumed;
- It must be lawful in its subject matter: a penalty stipulated to encourage a violation of the law is null and void;
- It must not be contrary to public policy (art. 20 CO);
- It must be determined or determinable in its amount;
- In consumer contracts or general terms and conditions, it is subject to enhanced proportionality control.
Practical Drafting of an Effective Contractual Penalty Clause
A well-drafted contractual penalty clause specifies:
- The triggering event (delay, non-delivery, breach of confidentiality, breach of non-compete prohibition);
- The amount of the penalty (fixed, per day of delay, per violation);
- Whether the penalty is exculpatory (replaces performance) or cumulative (added to performance);
- Whether additional damages are reserved or excluded;
- The maximum cap on cumulated penalties (in the case of a daily penalty).
PBM Avocats drafts and negotiates contractual penalty clauses adapted to each contractual situation, taking into account recent Federal Supreme Court decisions and sector practices in corporate law and real estate law.
Frequently Asked Questions About the Contractual Penalty Clause in Swiss Law
May the court reduce an excessive contractual penalty clause under Swiss law?
Yes, this is one of the peculiarities of Swiss law. Art. 163 para. 3 CO confers on the court the power to reduce penalties it considers excessive. This reduction is based on an overall assessment including the nature and circumstances of the contract, the debtor's fault, and the relationship between the penalty and the actual damage. The Federal Supreme Court has clarified that a manifest disproportion between the penalty and the damage is the main criterion for reduction.
Does the contractual penalty clause dispense with proof of damage?
This is precisely one of the main advantages of the contractual penalty clause (art. 161 para. 1 CO): the creditor may claim the penalty without having to prove the existence or amount of damage. The penalty is due as soon as the contractually provided condition is met (non-performance, delay, breach of a clause). However, if the actual damage exceeds the amount of the penalty, the creditor may only claim the surplus if they prove the debtor's fault (art. 161 para. 2 CO).
May a contractual penalty clause coexist with the obligation of performance?
Yes, according to art. 160 CO. The penalty is in principle cumulative with performance unless otherwise stipulated. Thus, if the contractual penalty was provided for the case of total non-performance, the creditor may claim either performance or the penalty, but not both simultaneously. If the penalty was stipulated for delay or defective performance, the creditor may claim both performance and the penalty.
May a contractual penalty clause be stipulated in general terms and conditions?
Yes, but with important limits. A contractual penalty clause inserted in general terms and conditions (GTC) must comply with the rule of unusualness: if it imposes on the other party an economic burden they could not reasonably have anticipated, it will be deemed not incorporated into the contract. In addition, the court will apply its power of reduction under art. 163 para. 3 CO more vigorously when the clause appears in non-negotiated standard GTC.
May a contractual penalty clause be stipulated in an employment contract?
Yes, but employment law provides specific rules. According to art. 340b CO, applicable to non-compete prohibition clauses, the contractual penalty may be stipulated. The court may however reduce an excessive penalty (art. 340b para. 3 CO) and the employer may only claim the additionally proven damage. The Federal Supreme Court's case law carefully controls the proportionality of these clauses in the employment law context.