A pharmaceutical distributor based in Germany contracts with a Swiss supplier for critical raw materials. A sudden export ban imposed by a third country cuts off the supply chain entirely. The German buyer demands performance. The Swiss supplier invokes force majeure. Both parties instinctively reach for their standard contract clauses – only to discover that Swiss contract law treats this situation with considerably more nuance than either side anticipated.
Force majeure and hardship in Switzerland are governed primarily by the Swiss Code of Obligations. This does not contain a single codified force majeure provision but instead distributes relief across several doctrines rooted in civil law tradition. A party seeking excuse from performance must satisfy strict conditions relating to foreseeability, causation, and the scope of contractual risk allocation. Swiss courts, led by the Bundesgericht (Federal Supreme Court of Switzerland), have developed a body of doctrine that is analytically precise but often more restrictive in practice than parties from common law jurisdictions expect.
This analysis examines the doctrinal foundations of force majeure and hardship under Swiss law, the gap between statutory text and judicial practice. Cross-border implications for European counterparties. Additionally, the strategic options available to businesses facing disruption. It covers competing interpretations, the rebus sic stantibus doctrine, good faith obligations, and the outlook for Swiss contract law in conditions of prolonged commercial uncertainty.
Doctrinal foundations: how Swiss law distributes relief from performance
Swiss commercial legislation does not use the term "force majeure" as a defined legal concept. This distinguishes Swiss law from French civil law tradition, which influenced it substantially, yet diverged on this point. Instead, Swiss contract law addresses non-performance through a combination of provisions within the law of obligations, each covering a distinct aspect of the problem.
The primary mechanism is Unmöglichkeit (impossibility of performance). Under Swiss obligations law, if performance becomes objectively impossible after the contract is concluded – through circumstances not attributable to the debtor – the debtor's obligation is extinguished. This is true impossibility: the thing cannot be done by anyone, not merely by this particular party. Subjective impossibility, meaning the debtor's own incapacity to perform, is treated differently and generally does not excuse the obligation.
A related doctrine is Wegfall der Geschäftsgrundlage (failure of the basis of the transaction), known in English-language literature as the clausula rebus sic stantibus doctrine. This provides relief not when performance is impossible, but when the factual basis upon which the parties contracted has fundamentally and unforeseably changed. Courts invoke this doctrine sparingly. The Federal Supreme Court has repeatedly held that commercial hardship – even severe hardship – does not by itself constitute a failure of contractual basis. The change must be so fundamental that enforcing the original terms would produce a result the parties could not reasonably have intended.
There is also the broader principle of good faith embedded throughout Swiss obligations law. The duty to perform in good faith, and the corresponding obligation to renegotiate in circumstances of radical disruption, derives from this principle. It operates as a background norm against which specific contractual provisions are interpreted. In practice, however, good faith arguments alone rarely succeed unless anchored to one of the more specific doctrines above.
Finally, the doctrine of culpa in contrahendo (fault in negotiating) may arise where one party induced the other to contract on terms that did not account for foreseeable risks. This is more relevant at contract formation than at the point of disruption, but it shapes how courts assess the parties' original risk allocation.
The gap between statute and practice: what courts actually decide
Understanding what Swiss courts do in practice is as important as understanding the statutory structure. The gap between the formal requirements and the judicial outcomes is substantial. Additionally. It regularly surprises parties accustomed to either the more permissive treatment of force majeure under French or Italian law or the direct contractual approach common in English-governed agreements.
The Federal Supreme Court has consistently applied a high threshold for impossibility. Disruption caused by economic crises, currency fluctuations, supply chain failures, and even pandemic-related restrictions has generally not satisfied the objective impossibility standard. The court distinguishes between impossibility and increased cost or difficulty. Where performance remains physically and legally possible – even at significantly greater expense – the debtor is not excused. This position has been reaffirmed across a range of commercial disputes.
On the rebus sic stantibus doctrine, Swiss courts have established several conditions that must all be satisfied simultaneously. The change in circumstances must have been unforeseeable at the time of contracting. It must have occurred after the contract was concluded. It must render performance so inequitable that adherence to the original terms would be unconscionable. And the affected party must not have assumed the risk of that change, either expressly or by implication from the contract's nature. All four conditions are assessed strictly. In practice, the overwhelming majority of hardship claims based on rebus sic stantibus fail at the foreseeability threshold or the risk-allocation test.
An important procedural aspect concerns the remedy available when courts do accept a hardship claim. Swiss law does not treat contract adjustment as automatic. The court retains discretion to terminate the contract, to adjust its terms, or to require renegotiation. Termination is generally the remedy of last resort. Where adjustment is possible – for example, revising a price clause to reflect changed market conditions – courts prefer to maintain the contract. This reflects the strong civil law preference for contractual stability.
One area where practice has evolved is the treatment of government-imposed restrictions. Where a contract's performance is rendered impossible by a specific legal prohibition issued after contract formation. an export ban. A regulatory suspension, a force closure order. courts have shown somewhat greater willingness to engage with impossibility arguments. The key analytical step is whether the restriction targets the specific type of performance contracted for, or merely affects the debtor's broader business conditions. The former may support an impossibility argument; the latter generally does not.
For businesses engaged in corporate disputes in Switzerland, understanding this distinction before filing a claim or asserting a defence is essential. The characterisation of the disrupting event – as a restriction on performance itself, versus an increase in its cost or difficulty – will largely determine the doctrinal route available and its likelihood of success.
Courts sitting in Swiss commercial jurisdictions – particularly the commercial chambers of the cantonal courts in Zurich, Geneva, and Basel – have developed locally nuanced approaches. The Zurich commercial court has historically been more receptive to economic hardship arguments in long-term supply contracts. Geneva courts, with their proximity to international commerce and arbitration practice, tend to interpret force majeure clauses in international contracts with reference to comparative law and trade usage. These cantonal differences matter when choosing the appropriate court or arbitral seat.
Force majeure clauses in Swiss contracts: drafting and interpretation
Because Swiss statutory law provides limited relief, the contractual force majeure clause carries an outsized role in Swiss-governed agreements. Parties who invest in precise drafting can substantially extend – or restrict – the scope of available relief. Parties who rely on boilerplate or import clauses designed for other legal systems often find the protection they expected is unavailable.
Swiss courts interpret contractual force majeure clauses according to the general principles of contract interpretation under obligations law: the objective meaning of the words. The broader context of the agreement. Additionally, the principle of good faith. Where a clause is ambiguous, courts will generally construe it against the party that introduced it. Where a clause purports to exclude all liability for non-performance, Swiss courts apply a proportionality check – particularly in business-to-consumer contracts, but also in commercial agreements between parties of unequal bargaining power.
Several drafting features are particularly important in Swiss-governed contracts. First, the enumeration of triggering events. Swiss courts generally treat a force majeure clause as exhaustive if it lists specific events. An event not listed is unlikely to be treated as covered, even if analogous in nature. This is the opposite of the approach under some common law systems, where a general catch-all may be read broadly. Practitioners advising on Swiss contracts should therefore ensure the enumerated list includes the categories most relevant to the specific commercial relationship: government action, regulatory change, supply disruption, infrastructure failure, and so on.
Second, the notice requirement. Swiss force majeure clauses typically require the affected party to give notice within a defined period. often 48 to 72 hours of the triggering event. and to continue notifying the counterparty of the duration and expected consequences. Failure to give timely notice can defeat an otherwise valid force majeure claim. Swiss courts enforce notice provisions strictly, treating late notice as a waiver rather than a procedural defect to be cured.
Third, the mitigation obligation. Swiss law imposes a general duty to mitigate losses. A force majeure clause does not displace this. A party seeking to invoke force majeure must show that it took all reasonable steps to perform, to source alternatives, or to limit the impact of the disruption. Courts scrutinise the mitigation record closely, and a failure to document mitigation steps – even where the underlying disruption was genuine – can result in partial or full denial of the force majeure defence.
Fourth, hardship renegotiation clauses. These are increasingly common in long-term commercial contracts governed by Swiss law. A well-drafted hardship clause will specify the threshold for triggering renegotiation (typically, a defined percentage increase in the cost of performance or a defined deterioration in the economic equilibrium). The procedure for initiating talks, the timeframe for reaching agreement. Additionally, the consequences of failed negotiations. usually arbitration or, alternatively, termination at the option of either party. Swiss courts respect these clauses and will enforce the renegotiation obligation, including by directing parties to mediation as a preliminary step before adjudication.
For clients reviewing or entering Swiss-governed supply agreements, long-term service contracts, or infrastructure arrangements, early attention to these drafting elements is far more cost-effective than litigation after disruption has occurred. A lawyer in Switzerland familiar with the Federal Supreme Court's current doctrine can substantially reduce the risk of clause failure at the critical moment.
Cross-border implications for European counterparties
Many of the most commercially significant force majeure disputes under Swiss law arise in cross-border relationships: a German buyer and a Swiss manufacturer. A French financial institution and a Swiss counterparty, a Dutch infrastructure company and a Swiss project sponsor. In these situations, the conflict of laws analysis is not always straightforward, and the parties' assumptions about which legal system governs may differ.
Switzerland is not a member of the European Union and is therefore not bound by the Rome I Regulation, which governs contractual choice of law for EU member states. Switzerland applies its own private international law rules under the Federal Act on Private International Law. For commercial contracts, the parties' choice of law is generally respected. Where no express choice is made, Swiss rules apply a closest-connection test, which often results in Swiss law governing contracts with a Swiss performing party.
The practical consequence is that European parties contracting with Swiss counterparties cannot assume that EU-derived legal concepts – including the approach to force majeure developed under French, German, or Italian law – will apply. A German company invoking Wegfall der Geschäftsgrundlage under German civil law principles will find that the Swiss doctrine of the same name. While superficially similar, is applied through a different judicial lens and with a materially different threshold. The Swiss doctrine is generally stricter on foreseeability and more cautious about interfering with the parties' original risk allocation.
Enforcement of Swiss court judgments within the EU is governed by the Lugano Convention, to which Switzerland is a party. This provides a mechanism comparable to the Brussels I Regulation for recognition and enforcement within EU and EFTA member states. A party that obtains a judgment from a Swiss court. for example. Confirming that a force majeure defence was validly raised and that no damages are owed. can enforce that judgment in Germany, France. Alternatively, Italy under the Lugano framework. This gives Swiss court proceedings meaningful enforceability reach across Europe.
For parties subject to Swiss arbitration, enforcement is governed by the New York Convention. Switzerland is a contracting state, as are most EU jurisdictions. An award from a Swiss-seated arbitration – whether under ICC, Swiss Rules, or ad hoc procedure – will be enforceable across the EU without the additional steps required for foreign court judgments. This is one reason why Swiss arbitration seats, particularly Geneva and Zurich, are preferred for high-value cross-border contracts where enforcement reach is a priority.
The interaction between force majeure events and cross-border supply chains raises an additional layer of complexity: the question of concurrent impossibility. Where both the Swiss supplier and its EU counterparty are affected by the same disrupting event. a pandemic closure. A war affecting a shared supply region, a coordinated regulatory measure. each party may simultaneously seek to invoke force majeure. Swiss courts have addressed concurrent impossibility cases by examining which party bore the contractual risk of the triggering event and whether the disruption operated asymmetrically. An asymmetric disruption – one that affects the supplier's ability to perform but not the buyer's ability to receive and pay – is treated differently from a symmetric one.
For European businesses with Swiss contractual exposure, the starting point for any disruption analysis should be a careful review of the governing law clause. The force majeure and hardship provisions. Additionally, the notice obligations. before any event is formally declared. Premature or defective invocation of force majeure can itself constitute a repudiatory breach, triggering the counterparty's right to terminate and claim damages. This is one of the most common and costly errors seen in cross-border contract disputes involving Swiss law. Specialist advice from a litigation and arbitration team in Switzerland at the earliest stage of disruption can prevent a manageable situation from escalating into high-value proceedings.
Strategic options and when to switch between them
Businesses facing performance disruption under Swiss-governed contracts have a range of strategic options. The choice between them depends on several variables: the nature of the disruption, the contractual provisions, the parties' ongoing commercial relationship, the value of the affected obligation, and the strength of the available legal arguments.
The first option is formal invocation of contractual force majeure. This suspends the performance obligation for the duration of the force majeure event and, if the event continues beyond an agreed threshold period, may permit termination. To pursue this route, the party must satisfy the clause's triggering conditions, give timely notice, document mitigation efforts, and provide ongoing updates. Where the clause is well-drafted and the triggering event clearly falls within its scope, this is the most direct and legally secure approach.
The second option is renegotiation, either under a contractual hardship clause or on a without-prejudice basis. Where the disruption has materially altered the economic equilibrium of the contract but performance remains possible, renegotiation is often the commercially rational choice. Swiss law's good faith principle supports – and in some circumstances requires – a willingness to renegotiate in good faith when circumstances have radically changed. A party that refuses reasonable renegotiation after a genuine disruption may weaken its legal position if the matter subsequently proceeds to litigation or arbitration.
The third option is court or arbitral intervention to obtain contract adjustment or termination on rebus sic stantibus grounds. This is appropriate where renegotiation has failed, the disruption is sufficiently severe and unforeseeable to meet the legal threshold, and the value at stake justifies the cost and duration of proceedings. For proceedings before Swiss commercial courts – particularly those listed in the Handelsregister Schweiz (Swiss Commercial Register) – filing a statement of claim formally invokes the court's jurisdiction and begins the procedural timeline. An interim injunction may also be sought to preserve the status quo – for example, to prevent a counterparty from terminating the contract or drawing on a performance bond while the substantive dispute is resolved.
The fourth option – rarely considered but sometimes appropriate – is structured exit. Where performance has become economically unviable and the legal arguments for force majeure or hardship are insufficiently strong, a negotiated exit that minimises damages exposure may be more valuable than a protracted legal battle. The economics of the dispute should drive this assessment: claim value versus litigation cost versus the probability of success at each doctrinal threshold. Swiss commercial litigation is well-organised and relatively efficient by European standards. However. Proceedings before the Federal Supreme Court. the Bundesgericht. can extend over several years. Additionally, the costs of expert evidence on commercial disruption are not trivial.
The trigger for switching from one strategy to another is usually an identifiable event: a failed renegotiation meeting, a formal termination notice from the counterparty. A change in the nature of the disruption (from temporary to permanent). Alternatively, the expiry of a contractual cure period. Once a counterparty has issued a formal termination notice, the window for renegotiation narrows sharply. Acting promptly to seek legal advice at each decision point is therefore important.
One often-overlooked strategic consideration is the choice of legal form for the Swiss contracting entity. A company incorporated as an AG (Aktiengesellschaft. Swiss joint stock company) and a company incorporated as a GmbH (Gesellschaft mit beschränkter Haftung. Swiss limited liability company) have different governance structures and different statutory default provisions in areas such as liability and risk allocation. These distinctions can affect both the internal approval process for invoking force majeure and the external litigation strategy, particularly where the disruption raises questions about the directors' duty of care.
For comparative context, European clients dealing with parallel contracts governed by Portuguese law may find our analysis of force majeure and hardship doctrine in Portugal a useful reference point. The Portuguese approach shares civil law roots with Swiss law but diverges meaningfully on the conditions for hardship relief and the role of judicial price revision.
Outlook: where Swiss contract law is heading
Swiss contract law is not static. Several developments at the intersection of doctrine, legislation, and commercial practice are shaping how force majeure and hardship will be treated in the years ahead.
The most significant doctrinal trend is a gradual, cautious expansion of the rebus sic stantibus doctrine in the context of long-term contracts. The Federal Supreme Court has not abandoned its restrictive approach. However. In a series of recent decisions it has signalled that prolonged systemic disruptions. as distinct from ordinary commercial risk. may be treated with greater flexibility. This does not mean courts will routinely adjust prices or extend deadlines. It means the threshold of "unconscionability" for enforcing original terms may be interpreted more contextually in cases of extraordinary circumstances affecting entire market sectors.
Legislative reform is a secondary factor. The Swiss Law of Obligations has been subject to periodic review, and there have been academic and practitioner discussions about whether a more explicit force majeure or hardship provision should be introduced. As of now, no such reform has been adopted. The current doctrinal architecture – impossibility, clausula rebus sic stantibus, good faith – remains the operative system. Parties should not rely on anticipated legislative change when assessing their current contractual exposure.
A third development is the increasing influence of international arbitration practice on how Swiss-seated tribunals approach force majeure. ICC and Swiss Rules arbitration panels seated in Geneva or Zurich regularly handle disputes where the contract is governed by Swiss law but one or more parties are from jurisdictions with a more permissive force majeure doctrine. These panels draw on comparative sources – the UNIDROIT Principles of International Commercial Contracts, for example – when interpreting ambiguous clauses. The UNIDROIT Principles contain explicit hardship provisions that go further than Swiss statutory law. Where parties have expressly incorporated those principles, or where a tribunal applies them as a supplementary interpretive tool, the outcome may differ from a purely domestic Swiss law analysis.
Finally, the consequences of prolonged supply chain instability – driven by geopolitical fragmentation, climate-related disruptions, and infrastructure vulnerability – are reshaping how sophisticated parties draft Swiss-governed commercial contracts. The trend is toward more detailed force majeure clauses, explicit hardship renegotiation mechanisms, and price adjustment provisions linked to defined external indices. The legal profession in Switzerland is responding with increasingly standardised clause libraries that have been stress-tested against Federal Supreme Court doctrine. Businesses entering new Swiss-governed contracts in 2026 and beyond should treat these provisions not as boilerplate but as commercially critical terms requiring tailored attention.
To discuss a specific contractual situation involving force majeure or hardship under Swiss law, schedule a consultation with our team at info@ferrazwhitmore.com.
Self-assessment checklist for parties facing contract disruption in Switzerland
The following conditions and verification steps apply before taking any formal legal position under a Swiss-governed contract affected by disruption.
Force majeure invocation is available if:
- The contract contains an express force majeure clause and the triggering event falls within its defined scope
- The event was unforeseeable at the time of contracting and not caused by the invoking party
- Performance has become objectively impossible – not merely more costly or difficult
- Notice has been or can be given within the contractually required timeframe
- The party has documented all reasonable mitigation steps taken
Hardship renegotiation is the more appropriate route if:
- Performance remains physically possible but its economic basis has fundamentally changed
- The change was unforeseeable and did not form part of the contractual risk allocation
- The original terms, if enforced, would produce an outcome neither party could reasonably have contemplated
- The contract contains an explicit hardship or renegotiation clause, or Swiss good faith principles apply
Before initiating any formal step, verify:
- The governing law of the contract and the applicable dispute resolution clause
- Whether notice has been given on time and in the required form
- Whether the counterparty has already issued any formal notice or declaration
- The corporate authority of the person invoking force majeure on behalf of the entity
- Whether any interim relief – such as an interim injunction to preserve the contractual position – is needed before substantive proceedings begin
Frequently asked questions
Q: Does Swiss law recognise force majeure even if the contract does not include a force majeure clause?
A: Yes, to a limited extent. Swiss obligations law provides relief through the doctrine of objective impossibility, which excuses a debtor when performance has become truly impossible through circumstances beyond their control. However, the statutory threshold is strict: economic difficulty, increased cost, or supply disruption alone does not suffice. A party without a contractual force majeure clause relies on narrower statutory grounds and faces a higher burden of proof. Engaging a lawyer in Switzerland with experience in Federal Supreme Court doctrine is advisable before asserting any statutory impossibility argument.
Q: How long does it typically take to resolve a force majeure or hardship dispute before Swiss courts or in arbitration?
A: Proceedings before Swiss cantonal commercial courts typically take between one and two years at first instance, depending on the court, the complexity of the dispute, and whether expert evidence is required. Appeals to the Federal Supreme Court add further time. Swiss-seated arbitration under ICC or Swiss Rules can often be completed within 18 to 24 months for mid-complexity matters, though this varies significantly. Parties seeking urgent interim relief through an interim injunction – for example, to prevent contract termination pending resolution – can obtain a court ruling within days in some cantons. A law firm in Switzerland experienced in commercial litigation can advise on realistic timelines for specific dispute types.
Q: Is it a common misconception that European parties can rely on their home country's force majeure doctrine if the contract is silent on governing law?
A: Yes, and it is a costly one. Where a contract involving a Swiss party is silent on governing law, Swiss private international law rules will often result in Swiss obligations law applying – not French, German, or Italian law. European parties sometimes assume their familiar domestic doctrines apply by default, particularly if negotiations were conducted in their jurisdiction. In reality, the contract's closest-connection analysis under Swiss rules may point firmly to Swiss law. A civil procedure filing in a Swiss court will then apply Swiss doctrine, which differs materially on hardship and impossibility from most EU civil law systems. Checking the governing law position at the outset – ideally before signing – avoids this mismatch.
About Ferraz & Whitmore
Ferraz & Whitmore is an international law firm based in Lisbon, advising business clients across 46 jurisdictions. Our commercial litigation and contract law practice covers force majeure disputes, hardship renegotiation, and cross-border enforcement in Switzerland and across European markets. We combine Portuguese civil law expertise with English common law tradition to advise international businesses on Swiss-governed commercial contracts, dispute strategy, and court or arbitration proceedings. Our attorneys have advised on force majeure and hardship matters across both civil law and common law systems, including before Swiss commercial courts and international arbitral tribunals. The firm's Lisbon base provides direct access to Portuguese and EU regulatory rules, while our common law expertise supports enforcement and arbitration strategies in English-speaking jurisdictions. Ferraz & Whitmore is a member of leading international legal associations and participates in cross-border practice groups focused on commercial litigation and contract law. As a law firm in Switzerland with a transatlantic reach, we work with international entrepreneurs, institutional investors, and in-house legal teams navigating contract disruption across multiple legal systems. To discuss your specific situation under Swiss law, contact us at info@ferrazwhitmore.com.
Disclaimer: This publication is provided for informational purposes only and does not constitute legal advice. The information herein should not be relied upon as a substitute for professional legal counsel tailored to your specific circumstances. Ferraz & Whitmore assumes no liability for actions taken or not taken based on the contents of this material. For advice regarding your particular situation, please contact info@ferrazwhitmore.com.