How to Draft an Arbitration Clause in Switzerland (2026): Model Wording, Article 178 PILA Text Form & Seat Choices

Understanding how to draft an arbitration clause is one of the most consequential tasks in any cross-border Swiss contract, and one of the most frequently under-resourced. Switzerland remains the world’s most popular neutral seat for international arbitration, yet a surprising number of clauses fail at the enforcement stage because they overlook the formal requirements of Article 178 of the Federal Act on Private International Law (PILA) or use vague institutional references. The 2026 updates to the Swiss Rules of International Arbitration, particularly the refined joinder and consolidation mechanisms, have added a new layer of drafting choices that contracting parties must address at the clause-drafting stage, not after a dispute has arisen.

This guide provides copy-and-paste model wording for Swiss Rules, ICC and corporate multi-tier clauses, walks through every mandatory and recommended element, and flags the pathological drafting mistakes that Swiss Federal Supreme Court case law has repeatedly penalised.

Quick Answer, How to Draft an Arbitration Clause in Switzerland

At its simplest, an enforceable Swiss-seated arbitration clause must (1) clearly express the parties’ mutual consent to arbitrate, (2) define the scope of disputes covered, and (3) satisfy the “text form” requirement of Article 178 PILA. A minimal short-form clause can be as brief as one sentence:

“Any dispute arising out of or in connection with this contract shall be finally resolved by arbitration seated in Zurich, Switzerland.”

That short form is legally valid, but it leaves critical variables, institution, number of arbitrators, language, governing law of the arbitration agreement, to default rules or judicial determination. For any contract of commercial significance, drafters should use the expanded model wording set out below to reduce uncertainty and cost at the commencement stage.

Why the Seat, Language and Form Matter Under Swiss Law

Three foundational choices shape every Swiss arbitration clause: the seat, the procedural language, and the formal validity of the agreement itself. Getting any one of these wrong can expose the clause to challenge, delay enforcement, or shift the applicable procedural regime entirely.

Seat vs. Venue, Practical Choice

The seat of arbitration in Switzerland determines the lex arbitri, the procedural law governing the arbitration and the courts competent to hear set-aside applications. Under Chapter 12 of PILA, choosing a Swiss seat means that the Swiss Federal Supreme Court has exclusive jurisdiction over annulment challenges (on the narrow grounds listed in Article 190 PILA). The seat should not be confused with the venue, which is simply the physical location of hearings. Hearings may take place anywhere without affecting the seat. Recommended phrasing: “The seat of arbitration shall be [Geneva / Zurich / Basel], Switzerland. Hearings may be held at any location agreed by the parties or determined by the tribunal.”

Language Clause, Drafting Options

Switzerland’s multilingual character means that failing to specify a language of arbitration can lead to costly procedural disputes. The clause should state: “The language of arbitration shall be [English / French / German].” Where the underlying contract is in one language but the parties anticipate witnesses in another, consider adding: “Documents originally in [other language] may be submitted without translation, unless the tribunal orders otherwise.” This reduces translation costs while preserving procedural efficiency.

Article 178 PILA: “Text Form” Explained (Practical Compliance)

Article 178(1) PILA is the gateway provision for arbitration agreement requirements in Swiss-seated proceedings. It provides that an arbitration agreement is valid as to form if made “by text.” This replaced the earlier “in writing” standard following the 2021 PILA revision, deliberately lowering the formal threshold to align with modern commercial practice.

The practical effect is that an arbitration agreement no longer requires a wet-ink signature, but it must be evidenced by some form of text that records the parties’ consent. The text may be contained in a signed contract, an exchange of emails, a purchase order referencing general terms and conditions that include an arbitration clause, or even an electronic signature under Swiss law.

Examples of Acceptable Text Evidence

Common Pitfalls

• Purely oral agreements with no text trail. Even under the relaxed “text form” standard, a purely oral agreement to arbitrate, with no subsequent written confirmation, will not satisfy Article 178 PILA. Industry observers note that this remains the single most frequent ground for jurisdictional challenges in Swiss-seated proceedings.
• Ambiguous arbitrator-appointment language. Clauses that name a specific individual as sole arbitrator without a fallback mechanism risk becoming inoperable if that person is unavailable.
• Unsigned MOUs or term sheets. A memorandum of understanding marked “non-binding” that contains an arbitration clause may fail the consent element, the text form is satisfied, but the mutual intent to arbitrate is not.

Model Clauses (Copy-and-Paste, Ready to Use): Arbitration Clause Samples

The following model clauses are designed to be pasted directly into contracts. Each addresses a different institutional or transactional context. All satisfy the Article 178 PILA text-form requirement when included in a signed or text-confirmed agreement.

ICC Model Wording

Short form (ICC):

“All disputes arising out of or in connection with the present contract shall be finally settled under the Rules of Arbitration of the International Chamber of Commerce by one or more arbitrators appointed in accordance with the said Rules.”

This tracks the ICC’s own recommended model clause. For a Swiss-seated ICC arbitration, add the following supplementary provisions:

Long form (ICC, Swiss seat):

“All disputes arising out of or in connection with the present contract shall be finally settled under the Rules of Arbitration of the International Chamber of Commerce by three arbitrators appointed in accordance with the said Rules. The seat of arbitration shall be Geneva, Switzerland. The language of arbitration shall be English. The Emergency Arbitrator Provisions shall apply.”

Drafting tip: always specify the number of arbitrators. Leaving this to default can result in a sole arbitrator for lower-value claims or three arbitrators for higher-value claims, the threshold varies, and parties often prefer certainty.

Swiss Rules Model Wording

“Any dispute, controversy or claim arising out of or in connection with this contract, including the validity, invalidity, breach or termination thereof, shall be resolved by arbitration in accordance with the Swiss Rules of International Arbitration of the Swiss Arbitration Centre in force on the date on which the Notice of Arbitration is submitted in accordance with those Rules. The number of arbitrators shall be [one / three]. The seat of arbitration shall be Zurich, Switzerland. The language of arbitration shall be [English / German / French].”

This wording references the Swiss Arbitration Centre (formerly the Swiss Chambers’ Arbitration Institution) and the Swiss Rules of International Arbitration. It is the standard recommended clause for parties who want Swiss institutional administration with transparent fee schedules and strong joinder/consolidation mechanisms.

Corporate / M&A Clause (Multi-Tier with Mediation Step)

For corporate arbitration clauses in Switzerland, particularly in M&A, shareholder or joint-venture agreements, a multi-tier clause that requires negotiation or mediation before arbitration is common. The key drafting discipline is to make the pre-arbitration steps time-limited and not a condition precedent to commencing arbitration, to avoid enforceability challenges.

“(1) The parties shall first seek to resolve any dispute arising out of or in connection with this agreement through good-faith negotiation. Either party may initiate negotiations by written notice to the other party. (2) If the dispute is not resolved within 30 days of such notice (or such longer period as the parties may agree in writing), either party may submit the dispute to mediation administered by the Swiss Arbitration Centre under its Swiss Rules of Mediation. (3) If the dispute is not resolved within 60 days of the commencement of mediation, either party may refer the dispute to final and binding arbitration under the Swiss Rules of International Arbitration of the Swiss Arbitration Centre.

The number of arbitrators shall be three. The seat of arbitration shall be Zurich, Switzerland. The language of arbitration shall be English.

Drafting tip: include a carve-out for urgent interim relief, “Nothing in this clause shall prevent either party from seeking emergency or interim measures from the tribunal or any competent court.”

Multi-Party / Joinder Sample

Where a transaction involves multiple parties, guarantors, or group companies, the arbitration clause must expressly anticipate joinder and consolidation. The 2026 Swiss Rules include enhanced provisions for these situations, but the clause itself should provide consent:

“The parties agree that any third party to a related agreement containing a compatible arbitration clause may be joined to the arbitration in accordance with the applicable rules. The parties further consent to the consolidation of arbitral proceedings where disputes arise under related agreements and involve common questions of law or fact.”

How to Draft an Arbitration Clause: Institutional vs Ad Hoc Choices, Swiss Rules vs ICC in Practice

The choice between the Swiss Rules of International Arbitration and the ICC Rules is the most common institutional decision for Swiss-seated arbitrations. Both produce enforceable awards, but they differ in cost, administration and procedural flexibility. The following comparison addresses the drafting implications.

Ad hoc (UNCITRAL Rules) fallback: Where parties prefer no institutional administration, an ad hoc clause referencing the UNCITRAL Arbitration Rules should include an appointing authority: “…in accordance with the UNCITRAL Arbitration Rules. The appointing authority shall be the Swiss Arbitration Centre.” This prevents deadlock in arbitrator appointment.

Pitfalls and Pathological Clauses to Avoid (Swiss Focus)

Swiss Federal Supreme Court jurisprudence, and practitioner experience, reveals a recurring set of drafting errors that render arbitration clauses unenforceable, ambiguous or unnecessarily costly. The following “red lines” should be avoided:

• Vague or missing seat. A clause that says “arbitration in Switzerland” without specifying a city creates ambiguity over which cantonal court has supervisory jurisdiction. Always name the city.
• Conflicting forum-selection clauses. Including both an arbitration clause and a jurisdiction clause selecting state courts in the same contract (without clear scope delineation) creates a pathological conflict. Courts have had to interpret whether the parties intended arbitration, litigation, or both for different claim types.
• Oppressive multi-step prerequisites. Pre-arbitration requirements (negotiation, mediation, expert determination) that are open-ended, lack time limits, or are framed as conditions precedent to jurisdiction, rather than admissibility, can frustrate enforcement and delay proceedings.
• Naming a specific arbitrator without fallback. If the named individual dies, declines or has a conflict, the clause becomes inoperable absent a fallback appointment mechanism.
• Scope too narrow. Clauses limited to “disputes arising under this contract” may exclude tort claims, unjust enrichment, pre-contractual liability or claims under related instruments. The preferred scope is “arising out of or in connection with.”
• No text-form compliance. Relying on an oral side agreement to arbitrate, without any subsequent text confirmation, fails Article 178 PILA, even if both parties clearly intended to arbitrate.

Non-Signatories, Assignment and Joinder Under Swiss Law

Non-signatory arbitration in Switzerland is a developing area of law, but Swiss courts and tribunals have recognised several doctrines under which a party that did not sign the arbitration agreement may nevertheless be bound by it, or may invoke it.

Recognised bases include: agency (the signatory signed on behalf of the non-signatory); the “group of companies” doctrine (limited application in Switzerland, more cautiously applied than in some civil-law jurisdictions); assignment or assumption of contract (the arbitration clause transfers with the underlying obligation); and consent by conduct (a non-signatory participates in the performance of the contract and the arbitration without objection).

Drafting to Permit Consolidation / Joinder

To reduce the risk of parallel proceedings, include express joinder consent in every agreement in the transaction chain. Where multiple related contracts exist (e.g., a share purchase agreement, a shareholders’ agreement and a management services agreement), use identical or compatible arbitration clauses, same seat, same institution, same rules, and add: “The parties consent to the joinder of any party to a Related Agreement and to the consolidation of any arbitration commenced under a Related Agreement, in accordance with the applicable rules.”

Handling Group Companies & Guarantees

Where a parent company guarantees the obligations of a subsidiary, ensure the guarantee contains its own arbitration clause or expressly incorporates the arbitration clause from the underlying agreement. Without this, the guarantor may argue it is not bound to arbitrate, forcing the claimant into parallel court proceedings.

Final Checklist: How to Draft an Arbitration Clause, Contract Redline Tips

Use this numbered checklist when drafting or reviewing any Swiss-seated arbitration clause:

1. Name the institution (Swiss Arbitration Centre, ICC, LCIA, ad hoc under UNCITRAL Rules).
2. Specify the seat by city, e.g., “Zurich, Switzerland”, not merely “Switzerland.”
3. State the number of arbitrators (one or three) and the method of appointment.
4. Set the language of the arbitration.
5. Define the scope broadly: “arising out of or in connection with this contract.”
6. Specify the governing law of the substantive contract (distinct from the law of the arbitration agreement and the lex arbitri).
7. Address emergency / interim relief: confirm that Emergency Arbitrator Provisions apply (or exclude them expressly).
8. Include joinder and consolidation consent where the transaction involves multiple parties or related agreements.
9. If using a multi-tier clause, set time limits for each step and include a carve-out for urgent relief.
10. Ensure Article 178 PILA text-form compliance: the clause must appear in a text that is signed, exchanged, or otherwise recorded.
11. Include a confidentiality provision if the applicable rules do not impose one by default.
12. Confirm signatory authority: ensure each signatory has corporate authority to bind the entity to arbitration.
13. Review for conflicting jurisdiction clauses elsewhere in the contract or related agreements.
14. Add a costs provision if the parties wish to depart from the default “costs follow the event” approach.

Conclusion

Knowing how to draft an arbitration clause that is enforceable, efficient and tailored to a Swiss seat requires attention to a small number of critical elements: Article 178 PILA text-form compliance, precise seat designation, clear institutional selection, and, especially in multi-party transactions, express joinder and consolidation language aligned with the 2026 Swiss Rules or the latest ICC Rules. The model clauses and checklist in this guide are designed to be adapted to specific transactions. For complex or high-value agreements, early review of the arbitration clause by experienced Swiss arbitration counsel is the most reliable way to avoid costly pathological drafting at the enforcement stage.

Sources

1. Federal Act on Private International Law (PILA), Fedlex
2. Swiss Arbitration Centre, Swiss Rules of International Arbitration
3. International Chamber of Commerce (ICC), Dispute Resolution
4. International Bar Association (IBA), Guidelines for Drafting International Arbitration Clauses
5. Swiss Federal Supreme Court (Bundesgericht)
6. World Intellectual Property Organization (WIPO), ADR Model Clauses