Poland: Changes to the Polish corporate income tax law

International Tax Review is part of Legal Benchmarking Limited, 1-2 Paris Garden, London, SE1 8ND

Copyright © Legal Benchmarking Limited and its affiliated companies 2026

Accessibility | Terms of Use | Privacy Policy | Modern Slavery Statement

Poland: Changes to the Polish corporate income tax law

mazurkiewicz.jpg

Pawel Mazurkiewicz

With effect from January 1 2015, the Polish corporate income tax law has been amended substantially. These amendments were mainly aimed at governing three issues:

  • Elimination of certain opportunities for aggressive tax planning (in particular, structures allowing for the tax free exchange of assets);

  • Introduction of the new system of thin capitalisation restrictions; and

  • Introduction of a regime for the taxation of controlled foreign corporations (CFCs).

From the foreign investors' standpoint, the new thin capitalisation regime is certainly the most important item. Until the end of 2014, Polish thin capitalisation restrictions were, in practical terms, irrelevant (the permissible limit of debt-to-equity was 3:1, and even more importantly, in principle only loans provided by direct shareholders were qualified as falling within the scope of thin capitalisation). Therefore, almost all interest paid in respect to loans provided by related parties were fully tax deductible. New shape of this legislation introduces the following features of thin capitalisation:

  • Two alternative systems of restrictions are available (the choice is at the taxpayer's discretion);

  • The basic system is similar to this existing in the past, however much more restrictive (1:1 debt-to-equity limit instead 3:1, all loans from related parties fall within the scope of new regulations, irrespective of whether the relations between a lender or a borrower are direct or indirect);

  • The other system provides that all interest payable on loans (from both related and unrelated parties) may be subject to exclusion from tax deductible costs. However, unlike under the basic system, the factor which is used to decide to what extent interest can be tax deductible is not the debt-to-equity ratio, but the value coming from multiplication of (i) value of assets of a given taxpayer (measured according to the tax regulations) by (ii) basic reference rate of the National Bank of Poland, increased by 1.25%. In practice, this implies that a taxpayer may use large loans from either related or unrelated parties and enjoy the deductibility of interest on them, as long as the interest rate is reasonably low. This system was specifically tailored to the needs of the financial sector (banks, factoring and leasing companies); other entities may theoretically also use it but subject to another limitation, whereby the tax deductible interest cannot be higher than 50% of operating profit.

Very complex CFC regulations (which in the past were not present in the Polish tax system) implement the obligation for Polish taxpayers to report on the activities of the foreign tax residents which are controlled by them, and pay the tax in Poland as if these activities are carried out according to the Polish tax law. The law affects the activities of these foreign taxpayers in different ways, depending on whether they are incorporated in the EU, or countries with which Poland (or the EU) has concluded a treaty on the exchange of fiscal information, or countries involved in unfair tax competition (the list of such countries is published by the Ministry of Finance). Moreover, the factors which may also be important for the scope of the Polish tax obligations relating to CFC activities are the presence of their commercial substance and the height of the income tax rates applicable in the country of their tax residence.

Pawel Mazurkiewicz (pawel.mazurkiewicz@mddp.pl)

MDDP

Tel: +48 22 322 68 88

Website: www.mddp.pl

more across site & shared bottom lb ros

More from across our site

ITR’s survey data reveals widespread client disappointment with firms’ use of technology but our upcoming AI in Tax event offers advisers a chance to flip the script
Firms announced key tax partner hires across the US and UK, while fintech and software providers revealed board appointments and new tools for multinational tax teams
It continues a prolific spree of investment for the firm, after it launched in Indonesia, Thailand, Saudi Arabia and Japan in 2025
Booming APA statistics reflect the growing credibility of India’s TP framework and the country’s shift toward a tax certainty approach, ITR has heard
Partners at both firms have voted in favour of the tie-up, which marks ‘the largest law firm merger in history’
The latest edition of Taxing Times with ITR covers all the controversy from a dramatic period for the carve-out deal, and also dissects the big four's AI strategies
Hany Elnaggar examines how the OECD’s global minimum tax is reshaping PE concepts across the GCC, shifting the focus from formal presence to substantive economic activity
The combination between Ashurst and Perkins Coie, which will create a $2.8 bn law firm, is expected to close in Q3
The ‘highly regarded’ Stephanie Pantelidaki, who has big four experience, will be based in the firm’s London office
A co-operative working relationship with the UK tax agency has helped 'unblock entrenched positions' to the benefit of clients, Kara Heggs tells ITR
Gift this article