Arbitration vs Litigation for M&A Disputes in Poland (2026): Which Is Right for Your SPA?

Every share purchase agreement negotiated in Poland forces one pivotal clause decision: should post-closing disputes go to arbitration or to the Polish courts? The question of arbitration vs litigation Poland M&A matters more in 2026 than it did even two years ago, because both the institutional arbitration landscape and domestic procedural law have shifted materially. The ICC Arbitration Rules 2026, which entered into force on 1 June 2026, introduced Highly Expedited Arbitration (HEA), expanded emergency-arbitrator powers, and codified confidentiality obligations, all directly relevant to M&A arbitration clauses.

At the same time, the Polish Supreme Court’s decision in II CSKP 897/22 (19 January 2024) established that a party’s inability to fund arbitration costs can render an arbitration clause effectively unenforceable under Article 1165 §2 of the Code of Civil Procedure (CPC), pushing deal teams to rethink cost-allocation and escrow mechanics in every SPA dispute resolution clause.

Arbitration for Polish M&A Disputes: What It Is, When It Applies, and Who It Suits

Types and seats commonly used for Polish M&A

Polish M&A transactions typically default to one of three arbitration frameworks. The first is ICC arbitration seated in Paris, Warsaw, or another neutral venue, favoured in cross-border deals where both parties want a globally recognised institution. The second is the Court of Arbitration at the Polish Chamber of Commerce (Sąd Arbitrażowy przy KIG), seated in Warsaw, which is the leading domestic institution and applies its own procedural rules and tariff schedule. The third is ad hoc arbitration under the UNCITRAL Rules, occasionally chosen when parties want maximum procedural flexibility but are willing to manage the process themselves.

A critical drafting distinction is between the seat (which determines the procedural law governing the arbitration and the courts with supervisory jurisdiction) and the venue (the physical location of hearings). For Polish-law-governed SPAs, a Warsaw seat keeps the arbitration within the supervisory reach of Polish courts under CPC Part V (Articles 1154–1217), while a Paris seat under ICC rules subjects the arbitration to French procedural supervision.

Typical SPA arbitration clause elements

A well-drafted SPA arbitration clause for Polish M&A should specify at minimum:

• Seat and governing law. These are distinct choices; the governing law of the SPA (typically Polish) can differ from the seat of arbitration.
• Institution and rules. ICC 2026 or KIG rules, with an explicit opt-in to HEA or emergency arbitrator provisions where speed matters.
• Number of arbitrators. Three-member tribunals are standard for high-value M&A; sole arbitrator for disputes below a defined threshold.
• Language. English for cross-border deals; Polish for domestic transactions.
• Confidentiality. ICC 2026 now codifies confidentiality obligations, but the clause should reinforce these with explicit contractual commitments.
• Cost advance / escrow. Include a cost-advance obligation or escrow fund to neutralise the risk highlighted in SN II CSKP 897/22, that inability to pay arbitration costs can make the clause ineffective.

Arbitration enforceability in Poland is strong. Awards rendered under institutional rules are enforceable domestically and, for cross-border recognition, under the 1958 New York Convention, to which Poland is a contracting state. Domestic challenge grounds are limited to the narrow categories set out in CPC Articles 1205–1211.

Litigation in Polish Courts: What It Is, When It Applies, and Who It Suits

Court forums, remedies, and appeal routes

When an SPA does not contain an arbitration clause, or when the arbitration clause is found ineffective, disputes default to the Polish ordinary courts. Commercial cases are heard by designated commercial divisions of the regional courts (sądy okręgowe) as first-instance tribunals, with appeals to the appellate courts (sądy apelacyjne) and, on points of law, to the Supreme Court (Sąd Najwyższy).

Court proceedings are governed by the CPC, whose consolidated 2026 text reflects procedural reforms aimed at digitalisation and efficiency. However, ordinary civil and commercial cases in Polish courts still frequently take longer than institutional arbitration, particularly when multiple appeal stages are pursued. Court filings and hearings are public by default, which is a decisive disadvantage when an SPA dispute involves sensitive valuations, intellectual property, or buyer due-diligence data.

When parties prefer courts

Litigation in Polish courts is the stronger option in specific circumstances. Courts have full statutory power to grant interim relief, including freezing orders, asset attachments, and injunctions, with immediate domestic enforceability. They retain this residual authority even when an arbitration agreement exists (CPC Article 1166). Where the dispute implicates competition clearance, regulatory approvals, or other public-law questions, courts may be the only viable forum. And if one party genuinely cannot fund arbitration, the Supreme Court’s reasoning in II CSKP 897/22 provides a basis for arguing that the court should hear the case despite the arbitration clause.

Arbitration vs Court in Poland: Side-by-Side Comparison

The following table maps the core decision dimensions for SPA dispute resolution clauses in Polish M&A transactions. Use it as a quick reference before reading the detailed dimension-by-dimension analysis below.

Dimension-by-Dimension Analysis: Arbitration vs Litigation Poland M&A

The following dimensions carry the most weight when choosing between arbitration and litigation for Polish M&A disputes. Each section opens with the core trade-off, then contrasts the two options in detail.

Enforceability and valid challenge of arbitration agreements

Enforceability is the threshold question. An arbitration clause in an SPA is only useful if it survives challenge in Polish courts and produces an award that can be enforced domestically and abroad.

• Statutory framework. CPC Part V (Articles 1154–1217) governs arbitration agreements, proceedings, and award enforcement. An arbitration agreement must be in writing (or in a form allowing its content to be recorded) to be valid.
• Supreme Court signal on cost/access. In II CSKP 897/22 (19 January 2024), the Polish Supreme Court held that a party’s demonstrated inability to bear arbitration costs can justify court access despite a valid arbitration clause, under the framework of Article 1165 §2 CPC. The practical takeaway for SPA drafters: include cost-advance obligations, escrow provisions, or parent-company guarantees to eliminate the factual basis for this challenge.
• Cross-border enforcement. Poland is a contracting state to the 1958 New York Convention on the Recognition and Enforcement of Foreign Arbitral Awards, giving Polish-seated arbitral awards enforceability in over 168 jurisdictions. Grounds for refusal are limited to those enumerated in Article V of the Convention.
• Domestic setting aside. An award can be set aside by a Polish court only on the narrow grounds listed in CPC Articles 1205–1211, such as lack of a valid arbitration agreement, violation of due process, or contravention of public policy.

Interim relief and emergency measures

Interim relief is often the first battleground in M&A disputes, a buyer suspecting fraud may need to freeze assets before evidence disappears, or a seller may need to prevent premature disclosure of deal terms.

• Court powers. Polish courts retain full statutory authority to grant interim relief (injunctions, freezing orders, attachments) even where an arbitration agreement exists. CPC Article 1166 expressly preserves this residual jurisdiction. Court-ordered interim measures are immediately enforceable domestically.
• Emergency arbitrator (EA). Under the ICC 2026 Rules, a party can apply for emergency arbitrator relief before the tribunal is constituted. The EA can order provisional measures within days. However, the enforceability of EA orders in Poland depends on court cooperation, Polish courts have not yet fully developed a consistent practice for recognising and enforcing EA decisions.
• Hybrid clauses. Industry observers expect the best practice for 2026 SPAs to be a hybrid interim-relief clause: arbitration as the primary forum, with an express carve-out permitting either party to seek interim measures from Polish courts without waiving the arbitration agreement.

Costs: fees, tariffs, and allocation

Cost structure differs materially between the two forums and can influence both the choice of forum and the cost-allocation mechanics written into the SPA.

SPA cost-allocation clauses should address: who advances arbitration costs, whether the loser pays, whether escrow funds cover tribunal fees, and what happens if one party defaults on cost obligations.

Timing and expedited procedures

The ICC Arbitration Rules 2026 introduced Highly Expedited Arbitration (HEA) for claims meeting specified thresholds and early determination of issues that can resolve dispositive legal or factual questions without a full hearing. These mechanisms can produce awards or partial determinations within weeks to months, substantially faster than a fully contested court proceeding in Poland. Polish courts, despite ongoing digitalisation reforms reflected in the CPC’s 2026 consolidated text, generally require longer timelines for commercial disputes at first instance, with appellate stages adding further delay.

Confidentiality, public record, and reputational risk

Arbitration proceedings and awards are generally confidential, and the ICC 2026 Rules now codify confidentiality obligations for participants. Court proceedings in Poland are public: filings, hearing transcripts, and judgments enter the public record. For M&A disputes involving sensitive valuations, trade secrets, IP portfolios, or buyer financial data, confidentiality is often a decisive factor favouring arbitration.

Liability: damages, indemnities, and escrow claims

Both forums can award contractual damages and enforce indemnity provisions. The difference lies in enforcement mechanics and speed. Arbitral awards on warranty and indemnity claims can be enforced domestically through court recognition proceedings and internationally under the New York Convention. Court judgments are self-executing domestically but require EU regulation-based or treaty-based procedures for cross-border enforcement. Where an escrow agent holds post-closing funds, the SPA should specify which forum has jurisdiction to release escrow, and whether arbitral or court orders trigger the release mechanism.

What Changes in 2026

Two developments materially alter the arbitration vs litigation Poland M&A calculus for SPAs negotiated in 2026:

• ICC Arbitration Rules 2026 (effective 1 June 2026). The updated rules introduce HEA for eligible cases, expand the emergency arbitrator mechanism, add early determination of issues, strengthen arbitrator disclosure requirements, and codify confidentiality obligations. The practical effect is that ICC arbitration is now faster, more procedurally robust, and better suited to M&A disputes requiring specialist expertise and confidentiality.
• Polish CPC reforms and Supreme Court practice. The consolidated CPC text published in 2026 reflects procedural amendments, including some effective from 1 March 2026, that aim to modernise court-arbitral interaction and digitalise court procedures. Meanwhile, the Supreme Court’s decision in II CSKP 897/22 creates a practical incentive for SPA parties to build cost-advance protections into arbitration clauses, because a party that can demonstrate inability to fund arbitration may gain access to state courts despite a valid arbitration agreement.

Parties negotiating SPAs in 2026 must respond to both developments: opt into HEA or emergency arbitrator provisions where speed matters, and draft cost-advance and escrow clauses that foreclose the cost-access challenge recognised by the Supreme Court.

Decision Framework: When to Choose Arbitration and When to Litigate M&A Poland

Use the decision table and trigger conditions below to match your SPA’s dispute resolution clause to the deal’s specific risk profile.

Choose arbitration when:

• Confidentiality is a high priority, sensitive valuations, IP, or buyer due-diligence data must remain private.
• You want specialist arbitrators with M&A experience, not generalist judges.
• Both parties can commit to advance costs through escrow, parent guarantee, or contractual obligation, eliminating the SN II CSKP 897/22 risk.
• You value finality and limited grounds for appeal; consider opting into ICC 2026 HEA or early determination for speed.
• The deal is cross-border and you need an award enforceable in multiple jurisdictions under the New York Convention.

Choose litigation (Polish courts) when:

• You need urgent interim relief that only courts can grant with immediate domestic enforceability, freezing orders, asset attachments, or injunctions.
• The dispute involves competition clearance, regulatory approvals, or public-law questions where court jurisdiction is mandatory.
• One party genuinely cannot fund arbitration and there is a concrete risk the court will treat the arbitration clause as ineffective under Article 1165 §2 CPC.
• You need multi-level appeal rights to correct potential errors of law or fact.
• The opposing party is a purely domestic entity with assets only in Poland, making domestic court enforcement faster and simpler than arbitral award recognition.

When to Engage a Lawyer for This Decision

The dispute resolution clause is one of the highest-impact provisions in any SPA, yet it is routinely negotiated last, often under time pressure. Engage specialist counsel before you sign, not after a dispute arises. Specific situations that require professional advice:

• Pre-signing clause drafting. When you are finalising the SPA and need to choose between arbitration and litigation, select a seat, draft cost-allocation mechanics, and build in emergency-relief carve-outs.
• Escrow and cost-advance structuring. When the deal involves an escrow for warranty and indemnity claims, counsel must ensure the SPA specifies which forum’s order triggers escrow release, and that cost-advance obligations are robust enough to withstand a challenge under SN II CSKP 897/22.
• Emergency interim relief. When a post-closing breach is suspected and assets may be dissipated, counsel must move within days, filing for court interim measures or emergency arbitrator relief, or both under a hybrid clause.
• Cross-border enforcement planning. When the counterparty holds assets in multiple jurisdictions, counsel should map enforcement routes (New York Convention states, EU regulation-based recognition) before the dispute arises.
• Post-closing R&W claims. When a material warranty or representation breach is alleged, engage counsel immediately to preserve evidence, comply with notice provisions, and select the correct forum for the claim.

Conclusion

The question of arbitration vs litigation Poland M&A does not have a universal answer, but it does have clear trigger conditions. For cross-border deals where confidentiality, specialist expertise, and New York Convention enforceability are priorities, and where both parties can fund arbitration costs, arbitration under the ICC 2026 Rules or KIG is the stronger choice. For disputes requiring immediate court-ordered freezing measures, involving regulatory questions, or where one party faces genuine cost barriers, Polish courts remain the appropriate forum. Draft the SPA dispute resolution clause to match these conditions, build in cost-advance protections and hybrid interim-relief carve-outs, and engage specialist counsel before the clause is finalised, not after a dispute has already begun.

Sources

1. ISAP, Kodeks postępowania cywilnego (consolidated text 2026)
2. UNCITRAL, Convention on the Recognition and Enforcement of Foreign Arbitral Awards (New York Convention)
3. New York Convention, Full Text
4. ICC, Arbitration Rules and Procedure (2026 Rules)
5. Supreme Court of Poland, Decision II CSKP 897/22 (19 January 2024)
6. Ministry of Justice (Gov.pl), Mediation and Arbitration Policy
7. Court of Arbitration at the Polish Chamber of Commerce (KIG), About the Court
8. SA KIG, Rules and Tariff Schedule