A Warsaw-based IT company wins at first instance, loses on appeal, and now faces a final judgment that could expose it to liability exceeding PLN 5m. The appeal court's reasoning contains what appears to be a fundamental misapplication of contract law. The question is whether a cassation complaint to the Sąd Najwyższy (Supreme Court of Poland) is available – and whether it is worth pursuing.
Cassation to the Supreme Court of Poland is an extraordinary remedy available against final appellate judgments in civil and commercial cases. Polish civil procedure law limits cassation to cases meeting strict admissibility thresholds, including a minimum dispute value of PLN 50,000 in most civil matters. A cassation complaint must be lodged within two months of service of the reasoned appellate judgment.
This guide walks through the procedure step by step: admissibility conditions, the "pre-examination" stage, costs, timelines, and the three most common errors that cause cassation complaints to be dismissed before the merits are ever reached. Three business scenarios illustrate how the rules apply in practice.
What is cassation and when does it apply?
Cassation is not a third-instance appeal. It is a review of legal correctness, not a re-examination of facts. The Supreme Court of Poland does not hear witnesses, reweigh evidence, or substitute its factual findings for those of the court below. It asks one question: did the appellate court apply the law correctly?
Polish civil procedure law (the Kodeks postępowania cywilnego, Civil Procedure Code, KPC) restricts cassation to two grounds. First, a substantive infringement of law – meaning the appellate court applied a legal provision incorrectly or refused to apply one that should have governed. Second, a procedural infringement that could have affected the outcome – for instance, a failure to admit evidence that materially changed the result.
The minimum value threshold is PLN 50,000 for most civil and commercial disputes. Employment cases have a lower threshold of PLN 10,000. Family law matters concerning property have their own rules. Cases below these thresholds are inadmissible unless they fall into one of the statutory exceptions – for example, cases involving the protection of competition or intellectual property rights.
Critically, cassation is available only against judgments issued by the sąd apelacyjny (Court of Appeal) or, in certain categories, the sąd okręgowy (Regional Court) acting as a second-instance court. Interlocutory rulings and enforcement orders are outside the cassation track. Identifying the correct procedural history of your case is the first step before any cassation strategy is formed.
How does the pre-examination stage work?
Before the Supreme Court examines the merits of a cassation complaint, it applies a filter known as the przedsąd (pre-examination). This stage was introduced to manage caseload. It operates on written submissions alone – no oral hearing. A three-judge panel decides whether the complaint qualifies for full consideration.
The pre-examination gate requires the complainant to demonstrate one of four qualifying grounds. The case must raise a substantial legal question, resolve a conflict in the existing case law of the Supreme Court, require clarification of a provision that has produced divergent interpretations in lower courts, or be manifestly unjust in a way that warrants intervention. Satisfying at least one of these grounds is mandatory. A cassation complaint that argues only factual error or re-argues the evidence will be refused at pre-examination – and that refusal is not subject to further appeal.
In practice, the pre-examination stage is where most cassation complaints fail. The legal question must be formulated with precision. It cannot be a restatement of the party's grievance. It must identify a genuine interpretive ambiguity or doctrinal conflict at the level of Polish law, framed in a way that the Supreme Court can answer with general applicability. This requires a different drafting skill than an ordinary appellate brief.
We secured a favourable outcome at the pre-examination stage for a manufacturing client in the Mazowieckie region (autumn 2025), after two prior counsel had failed to frame the qualifying legal question in terms the Supreme Court accepted. The key was identifying a genuine conflict between two lines of Supreme Court judgments on contractual penalty clauses – rather than simply asserting the appellate court was wrong.
What are the procedural steps and costs?
The cassation complaint must be filed within two months of service of the reasoned appellate judgment. This is a hard deadline. Missing it by even one day renders the complaint inadmissible, and reinstatement of the deadline is available only in exceptional circumstances involving force majeure or serious illness. Commercial litigants rarely succeed in such applications.
The complaint must be drafted and signed by a professional representative – either an adwokat (advocate) or radca prawny (legal counsel). Self-representation before the Supreme Court is not permitted in commercial cases. This requirement, known as przymus adwokacki (mandatory professional representation), applies from the moment the cassation complaint is filed. The court fee (wpis) is calculated as a percentage of the dispute value, subject to a statutory ceiling of PLN 100,000.
A standard cassation complaint in a commercial dispute involves the following steps:
- Obtain the reasoned appellate judgment and calculate the two-month deadline from the date of service
- Conduct a legal audit to identify viable cassation grounds and at least one pre-examination qualifying ground
- Draft the complaint, pay the court fee, and file at the court that issued the challenged judgment
- Await the pre-examination decision – typically three to twelve months after filing
- If admitted, prepare written pleadings for the merits stage; oral hearing may or may not be scheduled
Total timeline from filing to final decision ranges from eighteen months to three years, depending on the complexity of the legal question and Supreme Court caseload. Costs – including court fees and professional fees – typically range from PLN 30,000 to PLN 150,000 for commercial cases. For disputes involving claims exceeding PLN 1m, the investment is often proportionate. For borderline cases, a candid cost-benefit analysis is essential before filing.
For context on how cross-border enforcement interacts with cassation proceedings, see our guide on enforcing a French judgment in Poland step by step.
What are the three most common mistakes?
Cassation complaints fail for predictable reasons. Understanding the failure patterns is as important as understanding the procedure itself.
The first mistake is misidentifying the cassation ground. Parties who lost at appeal because the court assessed the evidence unfavourably often frame their complaint as a substantive law infringement, when in reality they are challenging factual findings. The Supreme Court will not entertain factual challenges. A complaint that conflates legal error with factual disagreement will be dismissed at pre-examination.
The second mistake is inadequate formulation of the legal question for pre-examination. Many practitioners reproduce the grounds of appeal verbatim, adapted slightly for cassation. This approach almost always fails. The legal question must be abstracted from the specific dispute and framed as a question of general legal significance. "Did the appellate court correctly apply provisions on contractual penalties?" is insufficient. A properly formulated question identifies the specific interpretive conflict and explains why its resolution matters beyond this case.
The third mistake is procedural – filing the complaint at the wrong court or missing ancillary formalities such as the power of attorney or court fee payment. Polish civil procedure is unforgiving on formal defects. A defective complaint triggers a call to remedy within a fixed period; failure to remedy results in return of the complaint, not merely adjournment.
Our team obtained interim protective measures for a German investor's subsidiary in Lower Silesia (spring 2026) pending a cassation proceeding, preventing asset dissipation during the eighteen-month review period. Interim relief is available in cassation proceedings and is often overlooked by parties focused solely on the merits.
How do three business scenarios illustrate the rules?
Three scenarios show how cassation operates across different commercial contexts.
A manufacturing company in Silesia loses an appellate judgment on a supply contract dispute worth PLN 3m. The appellate court misapplied provisions governing force majeure. The dispute value exceeds PLN 50,000. A substantive law infringement ground is available. The pre-examination qualifying ground is a genuine conflict between two lines of Supreme Court judgments on force majeure in long-term supply contracts. Cassation is viable. The two-month clock starts running from the date the reasoned judgment is served.
An IT company based in Warsaw disputes a public procurement decision before the Krajowa Izba Odwoławcza (National Appeals Chamber, KIO). KIO appeal procedures are separate from the civil cassation track. Judicial review of KIO decisions goes to the Regional Court and then the Court of Appeal. If the Court of Appeal misapplies procurement law, a cassation complaint to the Supreme Court is available on the same two-month timeline and PLN 50,000 threshold. Understanding the KIO appeal pathway before reaching cassation is important for procurement disputes. For Spanish companies active in Poland, our guide on dispute resolution for Spanish companies doing business in Poland covers the full litigation map.
A foreign investor faces a final appellate judgment in a shareholder dispute involving PLN 8m. The investor's Polish subsidiary is also subject to sanctions compliance obligations that affect asset flows during the litigation period. The cassation complaint does not suspend enforcement automatically – a separate application for stay of enforcement must be filed. The interplay between cassation timelines and sanctions compliance windows requires coordinated legal strategy. For context on regulatory obligations running in parallel, see our overview of DORA compliance obligations as an example of how regulatory deadlines interact with litigation timelines.
Frequently asked questions
Q: Can cassation be used to challenge a judgment on the grounds that new evidence has emerged after the appeal?
A: No. Cassation does not allow the introduction of new evidence or reliance on facts that arose after the appellate judgment. The Supreme Court reviews the legal correctness of the appellate decision based solely on the record before the appellate court. If new evidence is material, the appropriate remedy is a separate action to reopen proceedings under the Civil Procedure Code's provisions on extraordinary remedies, not cassation.
Q: How long does a cassation proceeding typically take, and what does it cost?
A: From filing to final decision, the typical range is eighteen months to three years. The court fee is calculated on the dispute value, with a ceiling of PLN 100,000. Professional fees vary by case complexity. For a commercial dispute of PLN 1m to PLN 5m, total costs including court fees and counsel typically fall between PLN 40,000 and PLN 120,000. A cost-benefit analysis against the disputed amount and probability of admission is advisable before filing.
Q: Is it a common misconception that cassation automatically suspends enforcement of the appellate judgment?
A: Yes – this is one of the most frequent misunderstandings. Filing a cassation complaint does not automatically suspend enforcement. The opposing party may continue enforcement proceedings while cassation is pending. A separate application for a stay of enforcement must be filed with the court, supported by a showing that enforcement would cause irreversible harm. Parties who assume cassation provides automatic protection and fail to apply for a stay risk losing the practical benefit of any eventual cassation success.
Specific circumstances affecting your cassation strategy – including whether the pre-examination qualifying ground is sufficiently strong and whether interim relief is available – require individual assessment. Delay in instructing counsel after the appellate judgment is served forfeits time that cannot be recovered.
To receive an expert assessment of your cassation options and the strength of your pre-examination qualifying ground, contact info@kordeckipartners.com.
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 and cassation proceedings before the Supreme Court of Poland. We work with Polish entrepreneurs, foreign investors, and in-house legal teams. To discuss your situation, contact info@kordeckipartners.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. KORDECKI & Partners 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@kordeckipartners.com.