Civil liability under Swiss law rests on two fundamental pillars: contractual liability (art. 97 CO) and tortious liability (art. 41 CO). These two regimes share certain common elements — damage, causality, fault — but differ radically in terms of the burden of proof, limitation periods and effects. PBM Avocats in Geneva and Lausanne regularly advises and represents companies and individuals in complex civil liability disputes, often involving both legal bases simultaneously.
The Common Elements of All Civil Liability
Whether contractual or tortious liability is concerned, four elements must be present:
- Patrimonial damage: an involuntary reduction in net assets, comprising actual damage (damnum emergens) and lost profit (lucrum cessans);
- An unlawful act or contractual breach: violation of a legal norm or a contractual obligation;
- An adequate causal link between the act and the damage;
- Fault (intentional or through negligence), except in cases of special causal liability (liability for things, liability of vehicle keepers, etc.).
Contractual Liability (Art. 97 CO)
Art. 97 CO governs the liability of the debtor for non-performance or defective performance of their contractual obligations. Its characteristics are:
- Presumption of fault: the debtor's fault is presumed as soon as non-performance is established; it is for the debtor to prove that they committed no fault in order to exonerate themselves;
- 10-year limitation period (general period under art. 127 CO), subject to special shorter periods;
- Positive damages (performance interest) aim to place the creditor in the position corresponding to correct performance of the contract;
- Liability extends to auxiliaries used in the performance of the contract (art. 101 CO).
Tortious Liability (Art. 41 CO)
Art. 41 CO governs liability for unlawful acts committed outside any prior contractual relationship. Its characteristics are:
- Burden of proof on the victim: the victim must prove the defendant's fault (no presumption);
- Short limitation period: 3 years from knowledge (relative period) and 10 years from the harmful act (absolute period); 20 years for bodily injury or intentional damage;
- Negative damages possible (restoring the victim to the state prior to the harmful act);
- Unlawfulness requires the violation of a protective legal norm or an infringement of an absolute right (life, bodily integrity, property, personality).
Comparative Table of the Two Regimes
| Criterion | Contractual Liability (art. 97 CO) | Tortious Liability (art. 41 CO) |
|---|---|---|
| Precondition | Existence of a valid contract | No contract required |
| Fault | Presumed (to be rebutted by the debtor) | To be proved by the victim |
| Limitation (general) | 10 years (art. 127 CO) | 3 years relative / 10 years absolute (art. 60 CO) |
| Moral damages | In principle no (unless agreed) | Yes, if serious infringement of personality (art. 49 CO) |
| Vicarious liability | Art. 101 CO (contractual auxiliaries) | Art. 55 CO (employer's liability) |
| Contractual exclusion | Possible for slight negligence (art. 100 CO) | Impossible for fraud (art. 100 CO) |
Special Causal Liabilities
Beyond arts. 41 and 97 CO, Swiss law provides for several causal liabilities (without fault):
- Liability of the vehicle keeper (art. 58 Road Traffic Act): liability for traffic accidents caused by the vehicle, without proved fault;
- Liability of the animal keeper (art. 56 CO): for damage caused by an animal;
- Liability of the building owner (art. 58 CO): for damage caused by a defect in the construction or maintenance of a structure;
- State liability under cantonal state liability legislation (Geneva and Vaud state liability laws);
- Product liability for defective products (Product Liability Act).
Practical Strategy in Liability Disputes
When facing suffered damage, the correct identification of the applicable legal basis is crucial. PBM Avocats analyses each situation taking into account the nature of the relationship between the parties, the type of damage, the limitation periods and the evidentiary rules. Limitation is particularly important in tort matters: the 3-year period runs from knowledge of the damage and the responsible party, and a late action may be inadmissible. Interruption of limitation by a payment order or a conciliation request is often the first recommended step.
Frequently Asked Questions on Contractual and Tortious Liability
Can contractual and tortious liability be combined for the same damage?
In principle no, with exceptions. The general rule under Swiss law is that the two bases of liability cannot be freely combined: the victim must choose one or the other. However, when a breach of contract simultaneously constitutes a civil wrong (for example, a deception that is both a contractual fraud and a tortious act), the victim may pursue both actions in parallel if they do not lead to double compensation for the same damage. The Federal Supreme Court admits the concurrence of actions in limited cases.
Who bears the burden of proof in contractual vs tortious liability?
This is a fundamental difference. In contractual liability (art. 97 CO), the fault of the debtor is presumed: it is they who must prove that they committed no fault in order to exonerate themselves. In tortious liability (art. 41 CO), it is the victim who must prove all elements of liability: the defendant's fault, the damage and the adequate causal link. This difference often makes contractual liability easier to establish.
What is adequate causality and how is it assessed?
The adequate causal link is a condition of any liability action under Swiss law. It requires first a natural causal link (the damage would not have occurred without the faulty act — theory of equivalence of conditions) and then an adequate causal link: according to the ordinary course of events and general life experience, the act in question was apt to cause such damage. The Federal Supreme Court excludes causal adequacy where the damage results from an extraordinary and unforeseeable chain of causes.
In what cases is vicarious liability engaged in Switzerland?
Art. 55 CO provides for the liability of the employer for damage caused by their auxiliaries (employees, subcontractors) in the exercise of their work, unless they prove having taken all precautions dictated by the circumstances to avoid the damage (exculpation). Art. 101 CO extends this liability to auxiliaries used in the performance of a contract (contractual vicarious liability). In tort matters, art. 333 SCC provides for the liability of the head of household for persons under their supervision.
Can all liability be contractually excluded under Swiss law?
Partially. Art. 100 CO prohibits the contractual exclusion of liability for fraud or gross negligence. On the other hand, it is lawful to exclude or limit liability for slight negligence. Liability exclusion clauses in general terms and conditions are subject to the control of art. 8 UCA in consumer contracts (null if significantly disadvantageous). For B2B contracts, a contractual exclusion of liability for slight negligence is in principle valid, subject to the unusual clause rule.