LAW Insights    11.12.2025

Corporate Income Tax (CIT) in Poland

Poland has long attracted foreign investors with its stable legal environment, European Union membership, and competitive tax system. Understanding the principles of corporate income tax (CIT) is one of the key elements when planning business activities in Poland. This guide presents the most important aspects of Polish CIT from the perspective of a foreign investor.

Legal Framework and Scope of Taxation

Polish corporate income tax is regulated by the Act of 15 February 1992 on Corporate Income Tax. Taxation applies to legal persons, capital companies in organisation, and organisational units without legal personality, with the exception of enterprises in inheritance and partnerships without legal personality.

The distinction between limited and unlimited tax residency is of crucial importance for foreign investors. Taxpayers with their registered office or place of management in Poland are subject to unlimited tax liability, meaning taxation on all income regardless of where it is generated. Foreign entities that do not have their registered office or place of management in Poland are subject to limited tax liability only on income earned in Poland.

CIT Tax Rates

The Polish CIT system provides for two basic tax rates. The standard rate is 19% of the tax base and applies to most taxpayers. A preferential rate of 9% is available for small taxpayers and taxpayers commencing business activity. Small taxpayer status is granted to entities whose gross sales revenues in the previous tax year did not exceed the equivalent of 2 million euros.

However, it should be noted that the reduced 9% rate is subject to certain limitations. It cannot be used by entities created as a result of certain transformations, divisions, or contributions of an enterprise or its organised part. This restriction aims to prevent tax optimisation involving the artificial creation of new entities solely to benefit from the preferential rate.

Estonian CIT – Lump Sum Tax on Company Income

Polish tax law offers an alternative form of taxation known as Estonian CIT or lump sum tax on company income. This taxation model allows for deferral of tax payment until profit distribution. As long as earned funds remain in the company and are reinvested, no tax is collected.

Estonian CIT rates are 10% for small taxpayers and taxpayers commencing business activity and 20% for other entities. After accounting for the deduction of part of the tax paid by the company from the tax due from the shareholder, the effective combined taxation may be more favourable than under classic CIT.

Estonian CIT is available to limited liability companies, joint-stock companies, simple joint-stock companies, limited partnerships, and limited joint-stock partnerships, provided certain conditions are met. Shareholders of such a company may only be natural persons, and the company may not hold shares in other entities or conduct business in a special economic zone or under a decision on support for new investment.

IP Box Relief

Poland has introduced a preferential tax rate of 5% for income from qualified intellectual property rights, known as IP Box. This relief applies to income from patents, protection rights for utility models, rights from registration of industrial designs, rights from registration of integrated circuit topographies, supplementary protection rights for patents on medicinal products or plant protection products, rights from registration of medicinal products, rights from registration of plant varieties, and copyrights to computer programs.

The condition for using this relief is that the taxpayer conducts research and development activities directly related to the creation, development, or improvement of the qualified intellectual property right. The taxpayer must also maintain appropriate accounting records enabling the separation of revenues and costs related to individual rights.

Research and Development Relief

Taxpayers conducting research and development activities may benefit from an additional deduction of qualified costs from the tax base. This deduction is available regardless of whether these costs are included in tax-deductible expenses, meaning that the same expenditures may be taken into account twice in the tax settlement.

The amount of the deduction is 100% of qualified costs for most taxpayers, while for research and development centres the limit is 150%. Qualified costs include, among others, remuneration of employees engaged in R&D activities, materials and raw materials, expert opinions, advisory services, paid use of scientific and research equipment, and depreciation charges on fixed assets and intangible assets used in R&D activities.

Withholding Tax

Payments made to foreign entities may be subject to withholding tax in Poland. Standard rates are 20% for income from interest, copyrights and related rights, trademarks, know-how, and intangible services such as consulting, accounting, market research, legal services, or advertising. Dividends and other income from participation in the profits of legal persons are taxed at a rate of 19%, while certain payments for entertainment services are taxed at 10%.

These rates may be reduced or the tax may be completely eliminated under double taxation treaties concluded by Poland. The condition for applying a preferential rate is that the payer holds a tax residency certificate of the payment recipient. For payments exceeding 2 million zlotys annually to the same entity, the payer is obliged to withhold tax at the domestic rate, and the foreign entity may then apply for a refund of the overpaid tax.

Special rules apply to payments between related entities within the European Union. Under EU directives implemented into Polish law, dividend, interest, and royalty payments between qualifying related entities may benefit from withholding tax exemption after meeting certain conditions regarding the level of capital links and the period of their maintenance.

Transfer Pricing

Transactions between related entities must be carried out on arm’s length terms. Polish transfer pricing regulations require taxpayers to prepare transfer pricing documentation for controlled transactions exceeding certain value thresholds. These thresholds are 10 million zlotys for goods and financial transactions and 2 million zlotys for service transactions and those involving intangibles.

Local documentation should contain a description of the transaction, functional analysis, benchmarking study or compliance analysis, and financial information. Additionally, entities belonging to capital groups whose consolidated revenues exceed 200 million zlotys are required to prepare group documentation. The largest capital groups with revenues exceeding 750 million euros must submit country-by-country reporting.

Reporting Obligations and Deadlines

The tax year in Poland generally coincides with the calendar year, although taxpayers may choose a different twelve-month period as their tax year. The annual CIT-8 return must be filed by the end of the third month following the end of the tax year. The difference between the tax due and the sum of advance payments made must be paid by the same deadline.

During the tax year, taxpayers are required to make monthly advance tax payments. Small taxpayers may opt for quarterly advance payments. Advances are paid by the 20th day of the month following the month or quarter to which they relate.

Practical Aspects for Foreign Investors

When planning an investment in Poland, foreign entrepreneurs should consider several key tax issues. The choice of legal form of business is of significant importance for tax efficiency. The limited liability company remains the most popular form due to its combination of limited shareholder liability with operational flexibility and access to tax preferences.

Investment location may enable the use of tax exemptions under the Polish Investment Zone. This system replaced the earlier special economic zones and offers CIT exemptions of up to 70% of the value of qualified investment costs, depending on the region and size of the entrepreneur.

The financing structure of activities in Poland also requires careful planning. Polish thin capitalisation rules limit the possibility of including interest on loans from related entities as tax-deductible expenses. The surplus of debt financing costs is subject to a limit of 3 million zlotys or 30% of EBITDA.

How We Can Help – Support for Foreign Investors

Our law firm specialises in comprehensive legal and tax services for foreign investors entering the Polish market. We understand that navigating the Polish tax system can be challenging for entrepreneurs from other jurisdictions, which is why we offer full support at every stage of investment.

In the area of CIT, we help our clients choose the optimal form of taxation, taking into account the specifics of their business and objectives. We advise on the choice between classic CIT and Estonian CIT, analysing the benefits and limitations of each solution in the context of the individual investor’s situation. We also support the implementation of tax reliefs, including IP Box and research and development relief, helping to properly document activities qualifying for preferences.

Our team provides comprehensive transfer pricing services, from preparing transfer pricing policies through preparing required documentation to support in the event of tax audits. We also advise on withholding tax matters, helping with the correct application of double taxation treaties and obtaining refunds of overpaid tax.

For investors planning to start business in Poland, we offer support in choosing the optimal legal structure, company registration, and obtaining a decision on support under the Polish Investment Zone. We also provide ongoing tax services, including preparation of tax declarations and returns, as well as representation before tax authorities.

By working with our firm, foreign investors gain a partner who not only knows Polish tax law but also understands the specifics of conducting cross-border business and can communicate effectively in English and other foreign languages. We invite you to contact us to discuss your investment plans and tax optimisation opportunities.

See also

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