The Loan Agreement Under Polish Law
I. The Loan Agreement in Polish Private Law
The loan agreement (umowa pożyczki) is governed by Article 720 of the Polish Civil Code. Under its terms, the lender undertakes to transfer ownership of a specified quantity of money or fungible goods to the borrower, who in turn assumes an obligation to return the same quantity of money, or goods of the same kind and quality, within an agreed period. Where the value of the loan exceeds PLN 1,000, the agreement must be concluded in documentary form (forma dokumentowa).
From a tax perspective, the proper characterisation of the transaction is of paramount importance. Polish law distinguishes the loan agreement from several cognate institutions — notably the bank credit facility (kredyt), regulated by the Banking Law Act; the irregular deposit (depozyt nieprawidłowy); and supplementary capital contributions (dopłaty) to a limited liability company — each of which engenders materially different tax consequences. The careful drafting of the loan agreement thus has a direct and frequently decisive bearing on its tax treatment.
II. The Tax on Civil Law Transactions (CLTT)
The principal tax incident arising from the conclusion of a loan agreement is the Tax on Civil Law Transactions (podatek od czynności cywilnoprawnych, “CLTT”), governed by the Act of 9 September 2000 on the Tax on Civil Law Transactions. This levy — which has no precise equivalent in common law jurisdictions but bears a structural resemblance to the historical English stamp duty — attaches to the transaction itself rather than to any income it generates. Understanding the interplay between CLTT, VAT, and income tax is essential to a complete appreciation of the tax burden on lending transactions.
A. Rate, Tax Base, and Filing Obligations
The CLTT rate applicable to loan agreements is 0.5% of the loan principal or, in the case of loans of fungible goods, their fair market value (Article 7(1)(4) of the CLTT Act). The tax obligation falls on the borrower, who must file a CLTT-3 return and remit the tax within fourteen days of the date on which the obligation arises — that is, the date of execution of the loan agreement.
B. The Punitive Rate of 20%
Where a taxpayer invokes the existence of a loan agreement in the course of preliminary verification proceedings, a tax audit, tax proceedings, or a customs and fiscal audit — and the CLTT due on that transaction has not been paid — the applicable rate increases to 20% of the loan principal (Article 7(5)(1) of the CLTT Act). This constitutes one of the most severe tax sanctions in the Polish legal system. In practice, it most frequently affects loans between natural persons that were never reported to the tax authorities.
The mechanism produces a paradox that merits careful attention: where a taxpayer relies on an undocumented loan as the source of funds — for instance, to explain the origin of assets during an audit — the very act of invoking the loan triggers a tax liability forty times greater than that which would have applied had the transaction been properly reported. In the context of a tax dispute, a successful defence on the factual question (proving that the loan did occur) may thus paradoxically worsen the taxpayer’s position if CLTT was never remitted.
C. Exemptions from CLTT
The CLTT Act provides several exemptions of considerable practical significance.
Intra-family loans (the “zero group”). Loans between members of the so-called “zero group” of closest relatives (spouse, lineal descendants and ascendants, stepchildren, siblings, stepfather, and stepmother) are exempt from CLTT up to an aggregate amount of PLN 36,120 from a single lender over a rolling five-year period (Article 9(10)(b) of the CLTT Act). Loans exceeding this threshold remain exempt without monetary limit, but only where two cumulative conditions are satisfied: the borrower files a CLTT-3 return within fourteen days, and receipt of funds is documented by bank transfer, credit union transfer, or postal order. Failure to meet either condition results not merely in the loss of the exemption, but in the application of the punitive 20% rate — a consequence that is, by any measure, disproportionate to the gravity of the omission, yet one that the tax authorities enforce with regularity.
A distinction of practical significance must be drawn: the circle of persons entitled to the conditional exemption under Article 9(10)(b) (colloquially “group zero”) is narrower than Tax Group I as defined in the Inheritance and Gift Tax Act, which additionally encompasses parents-in-law, sons-in-law, and daughters-in-law. These latter relatives do not qualify for the unlimited conditional exemption above the PLN 36,120 threshold.
Loans from financial institutions. A loan agreement is excluded from the scope of CLTT where at least one party to the transaction is subject to value added tax (VAT) in respect of that transaction, or is exempt from VAT (Article 2(4) of the CLTT Act). In practical terms, this exclusion applies to all loans extended by banks, licenced lending companies, and other entities conducting financial services activities.
Shareholder loans to partnerships. A loan extended by a partner to a partnership (spółka osobowa — including general partnerships, limited partnerships, professional partnerships, civil-law partnerships, and limited joint-stock partnerships) is treated as a modification of the partnership agreement under Article 1(3)(1) of the CLTT Act and is subject to CLTT at the rate of 0.5%. The taxpayer is the partnership.
Shareholder loans to capital companies. A loan extended by a shareholder to a capital company (spółka z o.o. or spółka akcyjna) benefits from an exemption from CLTT under Article 9(10)(i) of the CLTT Act. It is therefore not subject to CLTT at all — a material distinction from the treatment of partner loans to partnerships. Given the interpretive uncertainties that may arise in complex corporate structures, it is advisable to secure the taxpayer’s position through an individual tax ruling.
III. Income Tax Treatment of Interest
A. Interest as Taxable Income of the Lender
Interest accruing under a loan agreement constitutes taxable income for the lender. Where the lender is a natural person not engaged in business activity, interest is classified as income from capital gains and subjected to a flat-rate personal income tax of 19% (Article 30a(1)(1) of the PIT Act). The obligation to withhold and remit the tax lies with the entity disbursing the interest.
Where the lender is a legal person or an organisational unit, interest constitutes income subject to corporate income tax on general principles, recognised at the time of receipt or capitalisation.
B. Interest as a Deductible Expense of the Borrower
Interest on a loan contracted for purposes connected with the borrower’s business activity constitutes, in principle, a tax-deductible expense (koszt uzyskania przychodu) — but only to the extent that the interest has been paid or capitalised (Article 16(1)(11) of the CIT Act).
The critical limitation is found in Article 15c of the CIT Act, which transposes Article 4 of the Anti-Tax Avoidance Directive (ATAD) into Polish law. Under the mechanism in force since 1 January 2022, excess borrowing costs — defined as the surplus of debt-financing costs over interest-type income — are deductible on a sequential basis: (1) up to PLN 3,000,000 of excess borrowing costs are always deductible in full (a statutory safe harbour); (2) any excess above PLN 3,000,000 is deductible only up to 30% of the taxpayer’s tax-adjusted EBITDA. This is not a simple alternative of “the higher of the two” but rather a cumulative mechanism — the PLN 3,000,000 threshold is always available, and the 30% EBITDA cap applies solely to the surplus above it. The distinction has material computational implications for intra-group loans of significant value, and its interaction with the transfer pricing safe harbour (discussed infra, Section VI) requires particular attention in the structuring of group financing arrangements.
C. Interest-Free Loans and the Doctrine of Gratuitous Benefits
A loan extended without consideration — that is, without interest — may be recharacterised by the tax authorities as conferring a gratuitous benefit (nieodpłatne świadczenie) on the borrower. In the case of loans between related parties, the authorities may impute income to the borrower in the amount of interest that would have been payable under arm’s-length conditions. Between natural persons not engaged in business activity — particularly within a family context — interest-free loans do not, as a general rule, give rise to such consequences, though the boundary is not as sharply drawn as one might wish.
IV. Loan Agreements and Value Added Tax
The extension of a loan by a registered VAT taxpayer constitutes a supply of services for consideration within the meaning of the Goods and Services Tax Act, but benefits from an objective exemption under Article 43(1)(38) of that Act, which covers the provision of credit and loan services as well as intermediation in the provision of such services.
This exemption carries, however, a significant collateral consequence. Exempt loan transactions enter the denominator of the VAT deduction ratio (Article 90 of the Goods and Services Tax Act), thereby reducing the taxpayer’s proportional entitlement to deduct input VAT. For businesses that extend loans only occasionally, this may result in an unanticipated erosion of VAT recovery on their ordinary commercial purchases. In such cases, it is prudent to obtain a tax opinion exploring whether the loan transaction may be excluded from the ratio as an ancillary transaction (Article 90(6) of the Goods and Services Tax Act).
A corollary of equal practical importance is this: the fact that a loan falls within the scope of VAT — even where exempt — displaces any liability to CLTT by operation of Article 2(4) of the CLTT Act. The principle is straightforward: loans extended by entities acting as VAT taxpayers in the course of their business activity are not subject to CLTT. This mutual exclusivity between the two levies is a cornerstone of the system and must be borne in mind whenever the tax consequences of a loan are analysed.
V. Withholding Tax on Interest in Cross-Border Loans
Interest paid by a Polish borrower to a foreign lender is subject to withholding tax at the domestic rate of 20% (Article 21(1)(1) of the CIT Act). This rate may be reduced under applicable double taxation treaties — typically to 5% or 10% — and under the Interest and Royalties Directive (2003/49/EC), interest payments between associated companies resident in EU Member States may be entirely exempt from withholding.
The application of a reduced rate or exemption is, however, conditional upon the remitter holding a current certificate of tax residence (certyfikat rezydencji) issued by the lender’s jurisdiction and upon the exercise of due diligence (Article 26(1) of the CIT Act), which encompasses verification of the beneficial ownership (beneficial owner) status of the interest recipient. Customs and fiscal audits have in recent years increasingly focused on precisely these conditions, and the standard of diligence expected by the authorities has risen correspondingly.
In the broader context of cross-border lending, the international exchange of tax information enables the Polish tax administration to verify whether the foreign lender has in fact declared the interest income in its state of residence — a capability that has materially strengthened the enforcement of withholding tax obligations.
VI. Intra-Group Loans and Transfer Pricing
Loans between related parties within the meaning of Article 11a of the CIT Act are subject to a distinct documentary and substantive regime under the transfer pricing rules. The foundational principle is unremarkable in its articulation yet exacting in its application: the terms of the loan — interest rate, security, maturity, and repayment schedule — must correspond to those that would have been agreed between independent parties transacting at arm’s length (the arm’s length principle).
In practice, this entails the obligation to establish the interest rate through appropriate benchmarking, to prepare transfer pricing documentation (a local file, and in the case of groups with revenues exceeding PLN 200 million, a master file), and to submit a Transfer Pricing Report (TPR). The OECD Transfer Pricing Guidelines, and in particular Chapter X concerning financial transactions, serve as the principal interpretive reference for both the Polish tax authorities and the administrative courts.
The Polish legislature has introduced a safe harbour mechanism for intra-group loans (Article 11g of the CIT Act), the satisfaction of which precludes the tax authorities from adjusting the taxpayer’s income in respect of the loan. The safe harbour applies where the following cumulative conditions are met: the interest rate is variable, based on a reference rate (WIBOR/WIRON for PLN, EURIBOR for EUR, SOFR for USD, SONIA for GBP, SARON for CHF) plus a margin not exceeding the threshold published by the Minister of Finance; the loan term does not exceed five years; and the aggregate principal of loans from related parties does not exceed PLN 20,000,000 (or its foreign currency equivalent). Critically, the safe harbour applies only to loans bearing variable interest tied to a reference rate — fixed-rate loans do not qualify. Compliance with the safe harbour relieves the taxpayer of the obligation to prepare a benchmarking analysis, though it does not dispense with the requirement to maintain local transfer pricing documentation.
VII. Shareholder-to-Company and Company-to-Shareholder Loans
A loan extended by a shareholder to a Polish limited liability company (spółka z ograniczoną odpowiedzialnością) is among the most common financing transactions in commercial practice — and one that demands rigorous tax analysis.
For CLTT purposes, a shareholder loan to a capital company such as a spółka z o.o. benefits from an exemption from CLTT under Article 9(10)(i) of the CLTT Act. It is therefore not treated as a modification of the company’s constitutive documents and does not attract the 0.5% rate. Where the shareholder is additionally a registered VAT taxpayer extending the loan in the course of its business activity, the VAT exemption provides a further, alternative basis for displacement of any CLTT liability under Article 2(4).
The converse scenario — a loan from the company to its shareholder — carries the risk of recharacterisation as a constructive dividend. This risk materialises with particular force where the loan is repeatedly rolled over without genuine repayment, where the interest rate is below market, or where there is no realistic prospect or security for repayment. In such circumstances, the tax authorities may treat the loan as a disguised distribution of profits, triggering an obligation to withhold dividend withholding tax at 19% (PIT or CIT as applicable). The personal liability of the management board members for the company’s tax obligations may extend to any tax shortfall arising from such recharacterisation.
In the case of limited partnerships (spółka komandytowa) and general partnerships (spółka jawna), partner loans are treated as modifications of the partnership agreement for CLTT purposes under Article 1(3)(1) of the CLTT Act and are subject to CLTT at the rate of 0.5%, with the partnership as the taxpayer. By contrast, it is shareholder loans to capital companies (sp. z o.o., S.A.) that benefit from an exemption from CLTT under Article 9(10)(i). Irrespective of the entity type, the application of the GAAR clause remains a realistic possibility where the financing structure serves no genuine commercial purpose but is designed solely to generate tax advantages.
VIII. Cryptocurrency Loans and Decentralised Finance: Questions of Tax Classification
The emergence of decentralised finance (DeFi) protocols and cryptocurrency lending platforms has given rise to novel categories of financial transactions whose tax characterisation remains, at best, uncertain. Cryptocurrency-related transactions present challenges that are at once taxonomic, jurisdictional, and administrative.
The threshold question under the CLTT regime is whether the provision of crypto-assets through a DeFi lending protocol (such as Aave or Compound) constitutes a loan agreement within the meaning of Article 720 of the Civil Code. If so, a CLTT obligation arises. If, however, one concludes that a crypto-asset is neither money nor a fungible good but rather a property right (prawo majątkowe) — as arguably follows from its treatment under Polish income tax law — then its characterisation as a loan in the civil-law sense is open to serious doubt. The pseudonymous nature of blockchain transactions and the inherent difficulty in establishing the applicable tax jurisdiction further complicate any attempt to enforce CLTT in this domain.
The position under income tax is somewhat more tractable. Remuneration received for the provision of crypto-assets — whether designated as lending rewards, yield, or otherwise — constitutes taxable income under PIT or CIT. Unresolved questions remain, however, regarding the timing of income recognition (accrual versus receipt), the methodology of valuation in fiat currency, and the adequacy of transaction documentation.
The regulatory framework for crypto-asset markets is now governed by Regulation (EU) 2023/1114 (MiCA), while enhanced tax reporting obligations will follow upon the implementation of DAC8. The growing adoption of stablecoins as a lending medium, together with the proliferation of liquidity mining and yield farming strategies, will require the development of new interpretive approaches — current individual tax rulings leave many practical scenarios unaddressed.
IX. The General Anti-Avoidance Rule (GAAR) and Loan Transactions
The General Anti-Avoidance Rule — codified in Article 119a of the Tax Ordinance Act — may be invoked in respect of loan transactions where the principal purpose, or one of the principal purposes, of the arrangement is the obtaining of a tax advantage that is contrary to the object or purpose of the relevant tax statute, and where the manner of action was artificial.
In practice, the risk of GAAR application is most acute in the following configurations: back-to-back loans routed through entities established in favourable tax jurisdictions (e.g., Cypriot holding companies); the substitution of equity with debt financing to extract profits in the form of deductible interest; the artificial generation of interest expenses for the purpose of base erosion; and intra-group loans where the lender entity lacks genuine economic substance.
The boundary between permissible tax planning and impermissible avoidance in the context of lending transactions is not drawn with the precision that taxpayers might prefer. This uncertainty reinforces the importance of grounding any financing structure in genuine commercial rationale and comprehensive documentation — not because such measures guarantee immunity from challenge, but because they constitute the strongest available defence.
X. Loan Agreements and the Inheritance and Gift Tax
An interest-free loan extended by a close relative may be challenged by the tax authorities as a disguised gift (darowizna) where the circumstances indicate that the parties did not intend to seek repayment of the principal. Such recharacterisation entails liability to the inheritance and gift tax — though loans within Tax Group I may qualify for the exemption under Article 4a of the Inheritance and Gift Tax Act, provided that the donee files an SD-Z2 notification within six months.
The issue has a markedly practical dimension. During a tax audit, the authorities will examine whether the loan was in fact repaid, in whole or in part. The absence of evidence of any repayment — combined with the lack of interest and the absence of bank transfer documentation — may lead the authority to conclude that the transaction was, in substance, a gift, with all attendant tax consequences. The burden of demonstrating otherwise rests, as a practical matter, on the taxpayer.
XI. Historical Development of Loan Taxation
The taxation of lending transactions has a lineage extending to the earliest organised polities. In the mediaeval period, the canonical prohibition of usury (usura) shaped the development of alternative forms of taxing financial activity. A pivotal moment in the modern history of transactional taxation was the enactment of the English Stamp Act of 1694, which established duties on legal instruments — including loan agreements — and served as a model for colonial fiscal systems across several continents.
The twentieth century witnessed a marked divergence in the taxation of lending transactions. Common law systems gravitated toward the taxation of interest income alone, abandoning transactional levies on loan agreements as such. Continental European jurisdictions, by contrast, developed comprehensive systems of transaction taxes (Rechtsverkehrsteuer) that taxed the legal act irrespective of whether it generated income. In Poland, the contemporary framework took shape following the democratic transition of 1989. The Act on the Tax on Civil Law Transactions of 2000 established the current regime, introducing a base rate (initially 2%, subsequently reduced to 0.5%) and an elaborate system of exemptions that reflects both domestic policy choices and the influence of European harmonisation.
XII. The Future of Loan Taxation
The digitalisation of financial services presents fundamental challenges to established models of loan taxation. The expansion of peer-to-peer lending platforms, crowdfunding mechanisms, and blockchain-based lending protocols demands the adaptation of regulatory and fiscal frameworks that were designed for a different era.
Five principal trends are likely to shape the future trajectory of this field: the progressive digitalisation of financial instruments; the development of central bank digital currencies (CBDCs), which may enable real-time monitoring and taxation of lending flows; the growing significance of sustainability-linked finance (ESG-linked loans); the international harmonisation of tax systems through OECD and European Union initiatives aimed at eliminating both double taxation and double non-taxation; and the automation of tax reporting through real-time systems. Programmable money — a feature of several CBDC designs under development — may in time embed automated tax collection mechanisms directly into the payment infrastructure, fundamentally transforming the compliance landscape for lending transactions.
Concluding Observations
The tax consequences of a loan agreement under Polish law are determined by a constellation of variables operating simultaneously: the identity and status of the lender (natural person, company, or foreign entity); the identity and status of the borrower; whether the parties are related within the meaning of the transfer pricing rules; whether interest is charged; and whether the lender is a registered VAT taxpayer. An error in characterisation — even one as seemingly minor as the failure to file a CLTT return for an intra-family loan — may elevate the effective tax rate from 0.5% to 20%, a fortyfold increase that admits of no proportionality defence.
Before entering into a loan agreement — particularly one involving cross-border elements, related-party dynamics, or novel financial instruments — it is advisable to obtain professional tax advisory to ensure the correct characterisation of the transaction, to optimise its structure within the bounds of the law, and to mitigate exposure to tax risk. For cross-border and intra-group loans, the preparation of a comprehensive tax opinion or the procurement of an individual tax ruling is strongly recommended.
The Loan Agreement Under Polish Law – Further Reading
Loan Agreements Under Polish Tax Law: The VAT–Transfer Tax Dichotomy
Robert Nogacki – licensed legal counsel (radca prawny, WA-9026), Founder of Kancelaria Prawna Skarbiec.
There are lawyers who practice law. And there are those who deal with problems for which the law has no ready answer. For over twenty years, Kancelaria Skarbiec has worked at the intersection of tax law, corporate structures, and the deeply human reluctance to give the state more than the state is owed. We advise entrepreneurs from over a dozen countries – from those on the Forbes list to those whose bank account was just seized by the tax authority and who do not know what to do tomorrow morning.
One of the most frequently cited experts on tax law in Polish media – he writes for Rzeczpospolita, Dziennik Gazeta Prawna, and Parkiet not because it looks good on a résumé, but because certain things cannot be explained in a court filing and someone needs to say them out loud. Author of AI Decoding Satoshi Nakamoto: Artificial Intelligence on the Trail of Bitcoin’s Creator. Co-author of the award-winning book Bezpieczeństwo współczesnej firmy (Security of a Modern Company).
Kancelaria Skarbiec holds top positions in the tax law firm rankings of Dziennik Gazeta Prawna. Four-time winner of the European Medal, recipient of the title International Tax Planning Law Firm of the Year in Poland.
He specializes in tax disputes with fiscal authorities, international tax planning, crypto-asset regulation, and asset protection. Since 2006, he has led the WGI case – one of the longest-running criminal proceedings in the history of the Polish financial market – because there are things you do not leave half-done, even if they take two decades. He believes the law is too serious to be treated only seriously – and that the best legal advice is the kind that ensures the client never has to stand before a court.
