Double tax treaty between Poland and Poland – key

A German technology company establishes a Polish subsidiary, then discovers that its dividend payments trigger withholding tax at two levels – once in Poland and potentially again under its home-country rules. The question is not whether a double tax treaty applies. The question is which treaty, how to invoke it, and what documentation Polish tax authorities will require before granting relief.

Poland has concluded over 90 bilateral double tax treaties, each built around the OECD Model Convention. These treaties allocate taxing rights between Poland and the partner state, reduce or eliminate withholding tax on dividends, interest, and royalties, and define which country may tax business profits. Relief is not automatic – a taxpayer must satisfy residence, beneficial ownership, and documentation requirements before the lower treaty rate applies.

This guide walks through the structure of a typical Polish double tax treaty, the procedural steps for claiming relief, the three main business scenarios where treaty rules produce unexpected results, and the compliance pitfalls that generate the most disputes with the Krajowa Administracja Skarbowa (National Tax Administration, KAS). The guide also covers the interaction between treaty rules and domestic instruments such as the Podatkowa Grupa Kapitałowa (Tax Capital Group) and the family foundation regime introduced in 2023.

How does a Polish double tax treaty work in practice?

A Polish double tax treaty does three things at once. It assigns exclusive or shared taxing rights to one jurisdiction, it caps withholding tax rates on passive income, and it provides a mechanism – exemption or credit – to eliminate double taxation at the shareholder level. The applicable rate depends on the specific treaty, not on Polish domestic law alone. Poland's standard domestic withholding rate is 19% on dividends and 20% on interest and royalties. Most treaties reduce those rates significantly – to 5%, 10%, or 15% for dividends depending on the shareholding threshold.

The National Court Register (KRS) records the legal seat of a Polish entity, which anchors its tax residence. The Urząd Skarbowy (Tax Office) is the competent authority for withholding tax refund applications. The Polish Financial Supervision Authority (KNF) becomes relevant when the underlying transaction involves regulated financial instruments. Understanding which institution handles which aspect of the treaty claim saves weeks of misdirected correspondence.

Treaty shopping – routing income through an intermediate jurisdiction solely to access a favourable treaty – is the central anti-avoidance risk. Polish corporate income tax law introduced a Principal Purpose Test (PPT) aligned with the OECD's Base Erosion and Profit Shifting (BEPS) Action 6. If one of the principal purposes of an arrangement is to obtain a treaty benefit, KAS may deny that benefit. The PPT has teeth: assessments in this area regularly exceed PLN 1m and carry a 150% penalty surcharge for artificial arrangements.

Verify the partner state's treaty text – protocols and amending instruments may have updated rates
Confirm the beneficial ownership chain before each payment
Obtain a valid certificate of residence dated within 12 months of payment
Document the commercial substance supporting the treaty claim
Check whether the Multilateral Convention (MLI) has modified the treaty's anti-avoidance provisions

What are the withholding tax procedures and deadlines?

The withholding tax mechanism under Polish law follows a pay-and-refund model for payments exceeding PLN 2m in a calendar year to a single recipient. The Polish payer must withhold at the domestic rate – 19% or 20% – remit the tax to the Tax Office within 7 days of the end of the month of payment, and then the foreign recipient applies for a refund at the reduced treaty rate. The refund application must be filed within 6 years of the year in which the payment was made.

Below the PLN 2m threshold, the payer may apply the treaty rate directly at source, provided it holds a valid certificate of residence and conducts a due diligence assessment of the recipient's beneficial ownership status. That assessment must be documented in writing. KAS auditors specifically request this documentation during transfer pricing and withholding tax reviews. Missing documentation – even where the treaty clearly applies – results in the payer bearing the tax shortfall plus statutory interest at 8% per annum.

We secured a reversal of a withholding tax surcharge exceeding PLN 1.8m for a manufacturing client in the Mazowieckie region (autumn 2025). The original assessment arose from insufficient beneficial ownership documentation, not from any dispute about treaty eligibility. Rebuilding the documentation trail and presenting it during the administrative appeal stage resolved the case without litigation.

For transactions involving KSeF Poland – Poland's National e-Invoice System – practitioners should note that invoice data reported through KSeF feeds directly into the KAS analytical engine. Cross-referencing KSeF data with withholding tax declarations is now standard practice in KAS audits. The interaction between KSeF compliance and treaty claims is examined in detail in our guide on what KSeF means for your business.

Specific deadlines matter. The PLN 2m threshold resets on 1 January each year. A refund application filed more than 6 years after the payment year is statute-barred. An opinion on the application of the withholding exemption – issued by the Head of the National Tax Administration – is valid for 36 months from issuance and costs PLN 2,000 per application.

To receive an expert assessment of your withholding tax exposure under a specific Polish treaty, contact info@kordeckipartners.com. Each treaty structure carries specific documentation requirements that differ from the general framework described above, and a concrete analysis prevents costly corrections later.

How do treaty rules interact with transfer pricing and IP Box?

Transfer pricing and double tax treaties operate on parallel tracks that frequently intersect. The arm's length principle – embedded in both Polish tax law and in the OECD Transfer Pricing Guidelines incorporated by reference into most Polish treaties – determines whether an intra-group payment is recognised at the claimed amount. If KAS rejects the transfer price, the treaty-reduced withholding rate applies only to the arm's length portion. The excess is reclassified as a non-deductible cost, and the treaty benefit on that portion is denied.

Polish transfer pricing rules require documentation for transactions exceeding PLN 10m for tangible goods and PLN 2m for services and intangibles. A Local File must be prepared annually. A Master File is required when the Polish entity's consolidated group revenue exceeds PLN 200m. The interaction between these thresholds and treaty royalty provisions is particularly sensitive for technology companies. Our detailed analysis of the framework is available in our guide on transfer pricing safe harbours under Polish law.

IP Box – the preferential 5% CIT rate on qualifying intellectual property income – creates a layered interaction with treaty royalty articles. A Polish company earning royalties from a foreign licensee may simultaneously benefit from IP Box domestically and invoke treaty protection to limit the source-state withholding. However, the beneficial ownership test applies to the royalty recipient in the Polish entity's hands, not to the ultimate shareholder. Structuring the IP holding correctly from the outset avoids a situation where IP Box savings are offset by treaty denial at the foreign payer level.

Family foundations – introduced by Polish law in May 2023 – add another layer. A family foundation is tax-exempt on investment income during the accumulation phase but pays 15% CIT on distributions to beneficiaries. Treaty treatment of family foundation distributions is unsettled: some partner states treat distributions as dividends, others as other income. Tax advisors in Warsaw with experience in family foundation structures note that the treaty classification determines whether the reduced dividend article or the residual article applies – a difference that can amount to 10 percentage points of withholding tax.

What are the three business scenarios where treaty provisions produce unexpected results?

Three recurring patterns account for the majority of treaty disputes in Poland. Each scenario involves a different income type and a different compliance failure point. Understanding all three protects against the most common sources of personal liability for directors who sign off on cross-border payment structures.

Scenario 1 – Manufacturing company in Silesia. A German parent provides a loan to its Polish subsidiary. Interest payments are subject to withholding tax. The Poland-Germany treaty reduces the rate to 0% on interest, but the Polish payer fails to obtain a renewed certificate of residence after the previous one expires. KAS audits the payments and assesses withholding tax at the domestic 20% rate on 36 months of interest. The liability exceeds PLN 3m. The certificate requirement is procedural, not substantive – but KAS treats procedural non-compliance as a basis for full assessment.

Scenario 2 – IT company in Małopolska. A Polish software house licenses its platform to a Dutch entity. The Dutch entity sublicenses to end users across Europe. KAS argues that the Dutch entity lacks beneficial ownership of the royalties and that the Poland-Netherlands treaty does not apply. The assessment reclassifies the payments as Polish-source royalties taxable at 20%. The software house, as payer, bears the liability. Substance documentation for the Dutch entity – employees, decision-making, risk assumption – is the critical defence.

Scenario 3 – Foreign investor entering through a holding structure. A Cypriot holding company owns a Polish operating company. The Poland-Cyprus treaty provides a 0% withholding rate on dividends where the Cypriot company holds at least 10% of the Polish entity for 24 months. The investor distributes dividends before the 24-month holding period expires. The 0% rate is unavailable. The applicable rate reverts to 5%. On a dividend of EUR 10m, the difference is EUR 500,000. The holding period requirement is non-negotiable and non-waivable.

We obtained a favourable advance ruling for a foreign investor's holding structure in Lower Silesia (spring 2026), confirming treaty eligibility before the first dividend distribution. That ruling provided 36 months of certainty and eliminated the residual risk of a post-distribution assessment.

What compliance checklist should a Polish subsidiary follow?

Compliance with Polish double tax treaty obligations is an ongoing process, not a one-time filing. The checklist below covers the minimum annual cycle for a Polish entity making cross-border payments to related or unrelated foreign recipients. Each item corresponds to a specific KAS audit focus area identified in the National Tax Administration's published audit priorities for 2025–2026.

Collect updated certificates of residence from all foreign recipients before the first payment of each calendar year
Conduct and document a beneficial ownership assessment for each payment category – dividends, interest, royalties
Confirm that the PLN 2m threshold calculation is correct and that the pay-and-refund obligation is triggered where applicable
Prepare transfer pricing documentation for intra-group payments before the corporate income tax return deadline (typically 30 September following the tax year)
Review whether the Multilateral Convention has amended the applicable treaty's limitation-on-benefits or PPT provisions

Non-compliance does not merely generate tax assessments. Directors of a Polish company who approve payments without adequate treaty documentation may face personal liability under Polish corporate legislation for the company's resulting tax obligations. That liability is not limited to the tax amount – it extends to penalty surcharges and statutory interest. The irreversible consequence is that once KAS issues a final decision and the company cannot satisfy the debt, the personal liability claim against directors follows automatically.

Employment contracts and non-compete arrangements for cross-border executives also intersect with treaty rules. Where an individual is resident in one state and works in another, the employment income article of the applicable treaty determines which country has primary taxing rights. The 183-day rule is the starting point, but it is not the only test. Our analysis of related employment law considerations is available in our guide on non-compete clauses in Poland.

Your company's specific situation – the income types, the recipient jurisdictions, the payment volumes, and the existing documentation – determines the precise compliance steps required. Generic checklists are a starting point. A tailored strategy prevents the irreversible consequence of a KAS audit finding that forfeits treaty benefits already claimed. For a tailored strategy on treaty compliance, reach out to info@kordeckipartners.com.

Frequently asked questions

Q: How long does it take to obtain a withholding tax refund under a Polish double tax treaty?

A: The Tax Office has 6 months to process a refund application from the date it receives a complete file. In practice, applications involving beneficial ownership disputes or complex group structures take 9 to 12 months. Filing a complete application – including the certificate of residence, beneficial ownership declaration, and documentation of the commercial relationship – reduces processing time. Interest accrues on overdue refunds at the statutory rate, which has historically been lower than the interest KAS charges on tax underpayments.

Q: Is it true that the Poland-EU Parent-Subsidiary Directive makes treaties irrelevant for EU dividend flows?

A: This is a common misconception. The EU Parent-Subsidiary Directive provides an exemption from withholding tax on dividends paid between qualifying EU parent and subsidiary companies, but Polish law applies the Principal Purpose Test to Directive claims as well. Where KAS finds that the structure was arranged primarily to access the Directive exemption, it may deny the benefit and apply the treaty rate instead – or the domestic rate if the treaty rate is less favourable. The Directive and the treaty are parallel instruments, not substitutes for each other.

Q: What does a Polish tax advisor typically charge for a treaty position opinion?

A: Fee structures vary with transaction size and complexity. A written opinion on treaty eligibility for a single payment stream – covering beneficial ownership, PPT analysis, and documentation requirements – typically ranges from PLN 8,000 to PLN 25,000 depending on the complexity of the group structure. An advance ruling application to the Head of the National Tax Administration costs PLN 2,000 in official fees plus professional fees for preparation. For recurring payment streams, an annual retainer covering ongoing documentation review is more cost-effective than transaction-by-transaction opinions.

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 double tax treaty compliance, withholding tax structuring, and cross-border tax planning. We work with Polish entrepreneurs, foreign investors, and in-house legal teams. To discuss your situation, contact info@kordeckipartners.com.