A manufacturing company registered in the Mazowieckie region came to us in late 2024 with a specific problem. Its CIT return for the prior year showed a loss, and its tax advisor had flagged potential exposure to the minimum income tax – a charge that applies even when a company earns nothing. The directors were unsure whether they qualified for any exemption, and the financial stakes were real: the minimum tax base can reach several percent of revenue, regardless of profitability.
The Polish minimum corporate income tax (CIT minimum tax) applies to companies that either report a loss or whose tax income falls below 2% of revenue in a given year. Certain categories of taxpayer are explicitly excluded – including start-ups in their first three years, companies in financial difficulty, and those whose losses result from specific economic conditions. The charge is calculated on a defined base and credited against standard CIT if the company later returns to profit.
This case study traces how we assessed that client's exposure, identified the applicable exemption, and structured a defensible filing position. The lessons apply to any Polish-resident company – or foreign investor's subsidiary – facing the same question.
What triggered the minimum tax liability in this case?
The client – a mid-size component supplier in Mazowieckie – had reported a tax loss for two consecutive years. Under Polish corporate income tax legislation, a taxpayer that records a loss or whose tax profitability ratio falls below 2% becomes subject to the minimum tax. That threshold is calculated by dividing tax income by revenue. Even a small shortfall below 2% is enough to trigger the charge. The client's ratio sat at 1.4%, placing it squarely within scope.
The minimum tax base has two components. The primary element is 1.5% of the company's revenue from operating activities. A supplementary element may add certain debt-financing costs and intangible service fees paid to related parties. For our client, the combined base produced a liability approaching PLN 380,000 – a material sum for a business already under cash pressure.
What the directors had not considered was the exemption for companies whose losses are attributable to external, non-recurring economic factors. Polish tax law provides a carve-out when a taxpayer can demonstrate that its loss resulted from conditions beyond its operational control. The supply chain disruptions of 2022 and 2023 were precisely that kind of factor. Identifying and documenting this connection became the first strategic task. Our team obtained interim relief protecting the client's cash position while the substantive analysis was completed.
How did we identify the correct exemption category?
Polish corporate income tax legislation sets out several distinct exemption categories. Each has its own applicability conditions, and selecting the wrong one – or failing to document the right one – forfeits the exemption entirely. That is an irreversible consequence: once a return is filed without a valid exemption claim, the minimum tax becomes due and any later correction is subject to challenge by the National Tax Administration (Krajowa Administracja Skarbowa, KAS).
The categories we assessed for this client included: (1) start-up status – inapplicable, as the company had operated for over a decade; (2) financial restructuring proceedings before the District Court (Sąd Rejonowy) – not yet commenced; (3) the 30% year-on-year revenue decline threshold – the client's revenue had fallen by 28%, just short; and (4) the external-factor exemption for losses caused by conditions outside the taxpayer's control. The fourth category was the viable route.
Demonstrating the external-factor exemption required a documented causal chain. We prepared a memorandum linking the client's loss to specific supply disruptions, price increases in raw materials, and the impact on contracted margins. The National Court Register (Krajowy Rejestr Sądowy, KRS) filing history confirmed no change in business model during the relevant period. The Polish Financial Supervision Authority (Komisja Nadzoru Finansowego, KNF) sector data on component pricing corroborated the market-wide nature of the disruption. The file was built to withstand a KAS audit, not merely to satisfy the filing deadline.
What were the process steps and their outcomes?
The engagement ran from November 2024 to February 2025 – roughly 14 weeks. The timeline mattered because the annual CIT return filing deadline fell in March, and any exemption claim had to be embedded in that return rather than filed as a separate application. Missing the return deadline would have triggered automatic minimum tax assessment with interest accruing from the due date.
We secured a confirmed exemption position for this client, avoiding a minimum tax charge exceeding PLN 380,000 for a manufacturing group in Mazowieckie (winter 2024-2025). The process involved three structured phases. First, a scoping review identified which exemption category applied and what documentary evidence was required. Second, we built the supporting file – internal management accounts, procurement records, and third-party market data. Third, the exemption position was embedded in the CIT return with a contemporaneous technical note, creating a clear audit trail.
One practical detail proved important: the external-factor exemption does not require a separate application or advance ruling from KAS. It is self-assessed and declared in the return. That means the quality of internal documentation is the sole line of defence if KAS later questions the position. Companies that treat this as a tick-box exercise – without substantive supporting material – carry significant personal liability risk at board level. Transfer pricing discipline (see our note on transfer pricing safe harbours under Polish law) follows the same logic: self-assessed positions require self-sufficient documentation.
What should other companies take from this case?
The minimum tax affects a wider range of businesses than most directors realise. A company does not need to be in financial distress. It needs only to fall below the 2% profitability threshold – a situation that can arise from a single bad year, a major capital investment, or a shift in revenue mix. The charge is then calculated on revenue, not profit, which means it can be substantial even for businesses that consider themselves broadly healthy.
The lost-opportunity risk is real. Companies that do not proactively assess their position before the filing deadline may pay a charge they were never required to pay. Worse, they may claim an exemption without adequate documentation and face a KAS audit two or three years later – at which point interest and potential surcharges compound the original liability. For businesses with B2B contract structures under scrutiny, the interaction between minimum tax and reclassification risk adds another layer of complexity.
Three transferable lessons stand out from this engagement. First, exemption categories are specific and mutually exclusive – assess all of them before selecting one. Second, documentation must be contemporaneous; retrospective reconstruction is harder to defend. Third, the minimum tax interacts with other Polish tax instruments: IP Box regimes, family foundation structures, and KSeF compliance obligations (see what KSeF means for cross-border businesses) can all affect the effective tax position and should be considered together.
What to prepare if you face minimum tax exposure:
- Management accounts showing the profitability ratio calculation for the relevant year
- Documentary evidence linking any loss to specific external or non-recurring factors
- Related-party transaction schedules, particularly for intangible service fees
- KRS filing history confirming continuity of business model
- A technical memorandum setting out the chosen exemption category and its legal basis
The specific facts of your company's situation determine which exemption – if any – applies. A general assumption that an exemption exists, without a documented analysis, is not a defensible position under Polish tax law. A tax advisor Warsaw-based or otherwise needs to assess the full picture: revenue trends, related-party flows, IP Box elections, and transfer pricing positions all interact with the minimum tax calculation.
For a tailored assessment of your company's minimum tax exposure and exemption options, contact info@kordeckipartners.com.
Frequently asked questions
Q: Does the minimum tax apply if a company has a loss in only one year?
A: Yes. Under Polish corporate income tax legislation, a single year of loss – or a profitability ratio below 2% – is sufficient to trigger minimum tax liability. There is no requirement for consecutive loss years. The exemption categories must be assessed independently for each tax year, and documentation must be prepared on a year-by-year basis.
Q: Is there a misconception that small companies are automatically exempt?
A: There is. Many directors assume that small or micro enterprises fall outside the minimum tax regime. That is incorrect. Polish tax law does not provide a blanket size-based exemption. The exemption for start-ups in their first three years of operation is time-limited and applies only to newly established entities, not to established businesses that happen to be small. Each company must assess its own position against the statutory criteria.
Q: How long does it take to prepare a defensible exemption position?
A: In our experience, a well-documented exemption file takes between six and ten weeks to prepare properly, depending on the complexity of the company's cost structure and the availability of internal records. Starting the process at least three months before the CIT return deadline is advisable. Rushing the documentation phase is the most common reason exemption claims fail under KAS scrutiny.
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 tax advisory, minimum tax compliance, and CIT structuring. 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.