Tax litigation in Poland follows a structured administrative and judicial path, beginning with an internal appeal within the National Revenue Administration (KAS) and, if unresolved, proceeding through the voivodeship administrative courts (WSA) to the Supreme Administrative Court (NSA). For foreign companies, the process combines procedural formality with substantive complexity, particularly where transfer pricing, anti-avoidance rules and tax treaty positions are in dispute. Understanding each stage – and the strategic choices available at each – is essential to protecting a company's position before the dispute escalates.
The Institutional Framework: Who Decides Tax Disputes in Poland
Poland's tax administration operates under the consolidated structure of the National Revenue Administration (KAS), which brought together tax offices, customs services and the fiscal intelligence function into a single body. For foreign companies, this means that enquiries, audits and initial assessments are typically handled by specialised large taxpayer units within KAS, which have developed considerable expertise in cross-border matters, including transfer pricing reviews and treaty interpretation.
When a dispute arises from a tax assessment or a decision following a tax audit, the procedural path is defined by statute. The taxpayer files an appeal (odwołanie) to the second-instance tax authority within KAS. That body issues a fresh decision on the merits. If the outcome remains unsatisfactory, the company may file a complaint with the competent voivodeship administrative court (WSA) – the first level of independent judicial review. The WSA examines the lawfulness of the administrative decision rather than conducting a full retrial of the facts. Should the WSA ruling also be adverse, a cassation complaint to the Supreme Administrative Court (NSA) is available, but only on points of law or material procedural error. The NSA's rulings shape the interpretive landscape for all taxpayers and are closely watched by advisers across Poland.
It is worth noting that the NSA – sometimes referred to colloquially alongside the broader Sąd Najwyższy (Supreme Court) framework – is the apex court for administrative tax matters and its resolutions, particularly those issued by enlarged panels, carry significant practical authority even where they are not formally binding on all lower bodies.
Initiating a Dispute: The Administrative Phase
The administrative phase is not merely a procedural formality. The appeal to the second-instance authority within KAS is the taxpayer's principal opportunity to introduce new evidence, legal arguments and expert opinions. Polish procedural rules place considerable weight on the completeness of the administrative record, because the WSA will subsequently review the case primarily on the basis of that record. Gaps in the evidentiary foundation at the administrative stage can constrain a company's options before the courts.
Foreign companies should also be attentive to the distinction between a tax audit (kontrola podatkowa) and a tax proceedings investigation (postępowanie podatkowe). Each is governed by separate procedural provisions, carries different rights of access to files and imposes different timelines on KAS. Understanding which procedure is in motion at any given time – and the consequences of that designation for the company's right to respond – is a practical priority from the outset.
At this stage, companies must consider whether to engage with tax structuring arguments prospectively (through binding ruling requests, advance pricing agreements or other tools available under Polish law) or defensively (within the dispute itself). Where an advance pricing agreement was not obtained and a transfer pricing challenge is now underway, the administrative record will need to demonstrate the arm's length character of the intercompany arrangements through contemporaneous documentation and economic analysis.
If your company is currently facing a KAS audit or has received a first-instance decision, early legal input can shape the strategy for the entire dispute. We welcome enquiries at info@ferrazwhitmore.com or through our contacts page.
Judicial Review: WSA and NSA
Once the administrative phase is exhausted, the voivodeship administrative court (WSA) provides independent judicial scrutiny. The WSA does not rehear witnesses or reassess factual findings as a trial court would; it asks whether the administrative authority acted within its legal powers, applied the correct legal standard, and respected the taxpayer's procedural rights. This scope of review has important consequences for strategy: arguments that were not clearly raised and documented in the administrative phase may be procedurally foreclosed at the WSA stage, or at least weakened.
Polish administrative courts have, over time, developed a reasonably consistent body of case law on common dispute categories, including transfer pricing adjustments, the application of the general anti-avoidance rule (GAAR) – the clause on avoiding taxation (klauzula obejścia prawa podatkowego) – and the domestic implementation of EU anti-avoidance directives. However, interpretive divergences between different WSA chambers remain, which is precisely what drives cassation to the NSA and the NSA's role in harmonising doctrine.
At the NSA level, the cassation complaint must identify specific grounds: a violation of substantive law (incorrect interpretation or incorrect application) or a material breach of procedural rules that could have influenced the outcome. The NSA may uphold the WSA ruling, quash it and remit the case, or in certain circumstances resolve the matter itself. For foreign companies, NSA proceedings can extend the overall dispute timeline significantly – a factor that must enter into any honest assessment of litigation strategy versus settlement or mutual agreement procedure under a tax treaty.
Cross-Border Dimensions: Treaties, Transfer Pricing and Anti-Avoidance
For internationally operating groups, Polish tax litigation rarely involves purely domestic legal questions. The following cross-border layers regularly arise in disputes before KAS and the courts:
- Tax treaty application: Poland has an extensive network of double tax treaties. Disputes frequently turn on the characterisation of income, the existence of a permanent establishment, or the application of limitation-on-benefits and principal purpose test provisions introduced under BEPS-aligned treaty amendments. Where a treaty is in play, the possibility of initiating a mutual agreement procedure (MAP) under the relevant treaty – or under the EU Dispute Resolution Directive mechanism – should be assessed in parallel with domestic litigation, since MAP can in certain cases provide a path to eliminating double taxation even where domestic proceedings are unfavourable.
- Transfer pricing: KAS has invested significantly in transfer pricing audit capacity. Challenges typically focus on the selection of the transfer pricing method, the choice of comparables and, increasingly, the allocation of value to intangibles and risk within the group. The burden of maintaining comprehensive transfer pricing documentation in the form required by Polish regulations falls on the taxpayer, and deficiencies in that documentation can shift the practical burden of proof in a dispute.
- Anti-avoidance rules: Poland's domestic GAAR and its controlled foreign corporation (CFC) rules operate alongside the transposition of the EU Anti-Tax Avoidance Directives (ATAD I and ATAD II). The interaction between these layers – and the extent to which EU law arguments can be raised before Polish administrative courts – remains an active area of litigation and academic commentary. Companies structured through an sp. z o.o. or operating through Polish subsidiaries of EU-based groups will need to consider both domestic and EU-derived anti-avoidance exposure.
- Tax risk management across the group: A Polish tax dispute does not exist in isolation. Adjustments made by KAS to intercompany prices or to the characterisation of payments may trigger corresponding adjustments – or corresponding audit risk – in other jurisdictions. Coordinating the Polish litigation strategy with the group's overall tax risk management posture, and with advisers in counterparty jurisdictions, is a practical necessity rather than an option.
For an overview of how limitation periods interact with cross-border dispute timelines, our analytical guide on tax limitation periods compared sets out the key parameters across multiple jurisdictions.
Strategic Considerations for Foreign Companies
Foreign companies approaching Polish tax litigation face choices at each stage that have lasting consequences. The following strategic considerations are regularly relevant:
- Early legal engagement: The administrative phase – particularly the first-instance and second-instance proceedings within KAS – sets the evidentiary and legal record. Engaging Polish tax litigation counsel at the audit stage, rather than after the first decision is issued, typically produces a stronger record for subsequent judicial review.
- Choosing the right arguments for the right forum: Some arguments – for example, those based on EU fundamental freedoms or the primacy of EU law – may be better suited to the judicial phase, where Polish courts have a duty to apply EU law and, in appropriate cases, to refer questions to the Court of Justice of the EU. Administrative authorities within KAS do not have the power to make preliminary references and may apply domestic rules even where an EU law dimension exists.
- MAP and domestic litigation in parallel: Under most of Poland's tax treaties and under the EU Dispute Resolution Directive, a taxpayer may initiate MAP without necessarily suspending or withdrawing from domestic proceedings, though the interaction between the two tracks requires careful management to avoid unintended consequences.
- Suspension of enforcement: A challenge before the WSA does not automatically suspend the enforcement of a tax assessment. Companies should assess, at an early stage, whether to apply for a stay of enforcement and what security (if any) may be required, in order to avoid the financial impact of a contested liability crystallising before the dispute is resolved.
- Language and procedural requirements: All submissions to KAS and to the Polish administrative courts must be in Polish. Foreign companies typically need to operate through locally qualified representatives. The quality of legal translation and the accuracy of Polish-language submissions are not merely formalities – errors or ambiguities in procedural documents have caused material difficulties in practice.
Our practice in Poland covers both the administrative and judicial phases of tax disputes, as well as cross-border coordination where treaty or transfer pricing issues arise in multiple jurisdictions. Details of our tax disputes practice in Poland are available on our website.
The Role of Precedent and Interpretive Uncertainty
Polish administrative courts do not operate within a formal doctrine of binding precedent in the common law sense. However, the practical authority of NSA resolutions – particularly those of the expanded seven-judge panel – is significant. KAS and the WSA courts regularly take NSA positions into account, and a clear NSA ruling in the taxpayer's favour on a contested legal point can, in practice, resolve similar disputes without the need for full litigation.
Interpretive uncertainty remains a feature of certain areas, including the domestic implementation of Pillar Two (global minimum tax) rules, the precise scope of GAAR and its interaction with treaty anti-avoidance provisions, and the treatment of hybrid instruments and hybrid entity arrangements under Polish domestic law as amended to reflect ATAD II. Companies with exposure in these areas should obtain advice that reflects both the current state of Polish case law and the direction of NSA doctrine, rather than relying solely on the text of the statute.
For broader context on Poland's litigation landscape, our litigation and arbitration practice page for Poland addresses related procedural and strategic matters beyond the tax context.
Outlook and Practical Priorities
Poland's tax enforcement environment has intensified in recent years. KAS has developed more sophisticated audit tools, including data analytics capabilities applied to VAT and corporate income tax returns, and cross-border information exchange under the Common Reporting Standard and DAC frameworks has increased the volume of inbound audit triggers from other jurisdictions. For foreign companies, this means that the risk of a Polish tax dispute is not static – it is shaped by the group's global reporting footprint as much as by its domestic Polish positions.
The NSA and the WSA courts continue to develop doctrine on the most contested areas of Polish international tax law. Companies that monitor this case law – and that structure their Polish operations with an awareness of how the courts have assessed similar arrangements – are better placed to anticipate and, where possible, prevent disputes rather than only responding to them. Tax structuring decisions taken today will be assessed against the evidentiary and legal standards applied by Polish courts at the time of any future audit, which may be several years hence.
If your company is navigating a current dispute, facing a KAS audit, or assessing the litigation risk attached to existing Polish tax positions, Ferraz & Whitmore can provide structured analysis and representation across all phases of the process. Please contact us at info@ferrazwhitmore.com or visit our contacts page to discuss your situation.
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.