Class actions (pozew grupowy) – current state

A Warsaw-based retailer faces hundreds of near-identical consumer complaints about a defective product. Filing each claim separately would cost more than the claims are worth. A single pozew grupowy – a Polish group action – could change that arithmetic entirely. The question is whether the case qualifies, and whether the window to act is still open.

Polish group litigation is governed by the Act on Pursuing Claims in Group Proceedings (ustawa o dochodzeniu roszczeń w postępowaniu grupowym), which allows at least ten claimants to pursue standardised claims jointly before a single court. The proceedings are managed by a representative appointed from the group, with all members bound by the final judgment. Courts handling group actions include regional courts (sądy okręgowe) sitting as first-instance tribunals, with appeals going to appellate courts (sądy apelacyjne) and, ultimately, the Supreme Court of Poland (Sąd Najwyższy).

This guide walks through the step-by-step procedure, realistic timelines, cost structures, and the three most common scenarios where group proceedings either succeed or fail. It also flags the mistakes that cause courts to reject certification at the earliest stage – before a single substantive argument is heard.

What types of claims qualify for group proceedings in Poland?

Eligibility is the first filter, and it eliminates many cases that look like group actions at first glance. Polish group litigation law limits qualifying claims to three categories: consumer protection, product liability, and tort claims (including environmental harm). Claims arising from the same or similar factual basis must be standardised – meaning each claimant's loss can be expressed in a uniform amount or calculated according to a common formula. At least ten claimants must join the initial filing.

Standardisation is where most certification battles are fought. A group of consumers who each paid the same overcharged fee qualifies easily. A group of investors who suffered different losses at different times on different instruments is much harder to certify. Courts will examine whether the claims share a common legal basis, not merely a common defendant. The National Court Register (Krajowy Rejestr Sądowy, KRS) is often consulted to verify the defendant's legal standing and registered address for proper jurisdiction.

Three scenarios illustrate the boundary:

A bank charges 200 borrowers an identical unlawful fee – strong standardisation, likely certifiable.
A property developer delivers 50 flats with the same structural defect – certifiable if damages are calculated uniformly.
A manufacturer's product injures 30 consumers in different ways with different medical outcomes – standardisation is contested; subgroups may be required.

Subgrouping is permitted. Where individual losses differ, the court may divide the group into subgroups with standardised amounts within each. This flexibility preserves access to group proceedings even where damages are not perfectly uniform. However, each subgroup must itself contain at least two members – a detail that catches practitioners off guard in smaller disputes. The Polish Financial Supervision Authority (Komisja Nadzoru Finansowego, KNF) has been named as a background regulator in several financial mis-selling group actions, underscoring how regulatory findings can anchor the common factual basis needed for certification.

How does the step-by-step procedure work, and how long does it take?

Polish group proceedings unfold in three distinct phases: certification, merits, and enforcement. Each phase has its own deadlines and cost implications. The entire process from filing to final judgment typically runs between three and six years in complex cases, though straightforward consumer claims against a single corporate defendant have concluded in under two years at first instance.

Phase one – certification – begins when the representative files the group claim with the competent regional court. The court publishes a notice in a national newspaper (or its online equivalent) inviting eligible claimants to join within a court-set deadline, usually 30 to 60 days. The defendant may challenge certification. The court's certification ruling can be appealed, and this interlocutory stage alone can consume 12 to 18 months in contested cases.

Phase two – the merits – proceeds once certification is granted. Evidence is gathered, expert opinions commissioned, and oral hearings held. This is the longest phase. Courts often appoint a single expert to assess all claimants' losses simultaneously, which is one of the practical advantages of the group format over individual litigation.

Phase three – enforcement – begins after the judgment becomes final. Each group member enforces the judgment individually, though the representative coordinates the process. Key procedural steps include:

Filing the group claim with the correct regional court (jurisdiction follows the defendant's registered seat).
Paying the court fee – capped at PLN 100,000 for group proceedings, regardless of the total value claimed.
Publishing the membership notice and collecting declarations within the court's deadline.
Responding to the defendant's certification challenge within 14 days of service.
Submitting a unified damages calculation or subgroup schedule before the merits hearing.

We secured a reversal of a certification refusal for a consumer group of over 80 claimants against a financial services provider in the Mazowieckie region (autumn 2025). The court had initially rejected the claim on standardisation grounds; on appeal, the appellate court accepted our subgroup structure and remitted the case for merits proceedings. That outcome reinforced a point worth remembering: certification refusal is not the end of the road.

What are the real costs of group litigation in Poland?

Cost is often the decisive factor in whether a group action is commercially viable. Polish law caps the court filing fee for group proceedings at PLN 100,000 – a significant concession compared to individual filings where the fee is 5% of the claim value with no ceiling. For a group claiming PLN 10 million in total, that saving alone can exceed PLN 400,000. However, court fees are only one component of the total budget.

Legal fees for the representative's counsel typically follow a hybrid model: a fixed monthly retainer plus a success fee calculated as a percentage of the recovered amount. The success fee is capped by statute at 20% of the amount awarded to the group. This cap protects claimants from excessive contingency arrangements while still making group litigation financially attractive for law firms handling large, high-risk cases.

Expert witness fees represent the largest variable cost. In product liability cases, technical experts may charge between PLN 50,000 and PLN 300,000 depending on the complexity and volume of individual assessments. The court advances expert fees from funds deposited by the representative, who then recovers them from the losing party if the group succeeds. Losing defendants bear all court costs and reasonable legal fees under the standard Polish cost-shifting rule.

For foreign-owned defendants, the cost picture is further complicated by the need to serve process internationally and, in some cases, to obtain translations of evidence. Businesses with exposure to Polish consumer claims – particularly those described in our guide on dispute resolution for United States companies doing business in Poland – should factor group action risk into their Polish market entry assessments from the outset.

What mistakes cause group actions to fail at certification?

Certification refusal forfeits the procedural and cost advantages of group proceedings entirely. Individual claimants must then decide whether to pursue separate actions – an outcome that is often economically irrational for lower-value claims. Understanding the most common certification errors protects the group's only realistic path to recovery.

The most frequent mistake is filing before standardisation is properly documented. Claimants' lawyers sometimes rush to court to beat a limitation deadline, submitting a claim where individual loss calculations are still inconsistent. Courts reject these filings. A better approach is to prepare a detailed damages matrix before filing, showing how each claimant's loss is derived from the same formula – even if the resulting amounts differ between subgroups.

The second common error is underestimating the membership threshold. If claimants withdraw between filing and the close of the membership period, the group may fall below ten. This is particularly relevant in longer disputes where some claimants settle individually or become unreachable. The representative should maintain a buffer of additional potential members and keep communication active throughout the certification phase.

Third – and most consequential – is misidentifying the legal basis. Group proceedings require a single common legal ground. A claim that mixes contractual and tortious grounds for different claimants will not survive certification as a unified group. Separating the legal theories and running parallel proceedings, or restructuring the group around the stronger common ground, is the correct response. For companies with real estate-related group exposure, our analysis of environmental due diligence for Polish real estate illustrates how factual and legal standardisation problems arise in property-based group claims.

We obtained protective interim measures for a group of 45 investors in a real estate dispute in Lower Silesia (spring 2026), freezing the defendant's assets pending certification. Acting before certification is complete – using standard civil procedure interim relief tools – is an underused tactic that prevents defendants from dissipating assets during the lengthy certification phase.

To discuss how group proceedings apply to your specific dispute, contact info@kordeckipartners.com.

How do group proceedings interact with arbitration and other dispute routes?

Group proceedings and arbitration are mutually exclusive where the defendant's standard contract contains an arbitration clause. Polish courts have consistently held that a valid arbitration agreement bars group litigation before state courts, redirecting claimants to arbitration – typically before the Court of Arbitration at the Polish Chamber of Commerce (Sąd Arbitrażowy przy Krajowej Izbie Gospodarczej). This distinction matters enormously for companies assessing whether their contract templates inadvertently expose them to group actions or, conversely, whether their customers can use group proceedings to circumvent arbitration clauses.

Where arbitration is unavailable or the clause is unenforceable, group proceedings become the default collective mechanism. There is no Polish equivalent of a US-style class action opt-out procedure – Polish group proceedings are opt-in only, meaning each claimant must affirmatively join. This structural difference limits the potential scale of Polish group actions compared to common-law jurisdictions, but it also means defendants face a more predictable and bounded group from the outset.

Sanctions compliance has emerged as an adjacent concern in cross-border group disputes. Where a defendant is subject to EU or US sanctions, asset enforcement after a group judgment requires careful navigation of sanctions law before any recovery step. This intersects with the broader dispute resolution framework described in our guide on dispute resolution for Cyprus companies doing business in Poland, which addresses enforcement complexity for non-EU-domiciled defendants. The KIO appeal procedure (before the National Appeals Chamber, Krajowa Izba Odwoławcza) is a separate public procurement remedy and does not interact with civil group proceedings – though both may run in parallel where a procurement dispute also generates private law claims.

For a tailored strategy on group action exposure or representation, reach out to info@kordeckipartners.com.

Frequently asked questions

Q: Can a foreign company be a defendant in Polish group proceedings?

A: Yes. Polish courts have jurisdiction over foreign defendants where the harm occurred in Poland or where the defendant has a branch or registered subsidiary in Poland. The group representative must ensure proper service under EU rules or the relevant bilateral treaty. Translation costs and extended service timelines – sometimes exceeding 90 days – should be built into the certification phase schedule.

Q: How long does certification typically take, and what does it cost?

A: In uncontested cases, certification can be granted within six to nine months of filing. Where the defendant challenges certification, the interlocutory proceedings – including a possible appeal – typically add 12 to 18 months. Court fees for the certification phase are covered by the PLN 100,000 cap on total filing fees. Legal costs for the certification phase alone commonly range from PLN 80,000 to PLN 200,000, depending on the complexity of the standardisation argument.

Q: Is it true that all group members receive the same amount under a Polish group judgment?

A: This is a common misconception. Polish group proceedings do not require identical awards. The court awards amounts standardised within each subgroup, but different subgroups may receive different amounts. The key requirement is that each subgroup's award is calculated on a uniform basis – not that every claimant receives an identical sum. Individual enforcement of the judgment then follows the amounts assigned to each claimant or subgroup.

KORDECKI & Partners is a law firm based in Warsaw and Krakow, advising business clients across 30 jurisdictions. Our team combines expertise in Polish and international law with a practical approach to commercial litigation, group proceedings, and cross-border dispute resolution. We work with Polish entrepreneurs, foreign investors, and in-house legal teams. To discuss your situation, contact info@kordeckipartners.com.