Double tax treaty between Poland and Germany – key provisions

For a German investor with a Polish subsidiary, the difference between paying tax once and paying it twice often comes down to one document: the double tax treaty between Poland and Germany. Misread a single provision – on dividends, royalties, or permanent establishment – and the cost can reach six figures before any dispute is filed.

The double tax treaty between Poland and Germany (the Convention on the Avoidance of Double Taxation, DTT PL-DE) allocates taxing rights between both states across income categories including dividends, interest, royalties, capital gains, and employment income. Dividends paid from a Polish company to a German parent are subject to a withholding tax cap of 5% (for qualifying shareholdings) or 15% (in other cases) under the treaty. Royalties and interest payments between related parties require careful documentation to qualify for reduced rates and avoid reclassification by the Polish National Revenue Administration (KAS).

This alert covers the three provisions that most frequently generate disputes in cross-border Polish-German structures: withholding tax on passive income, the permanent establishment trigger, and the tie-breaker rules for dual-resident entities. Each section identifies the threshold that matters, the consequence of missing it, and the action your tax team should take now.

What withholding tax rates apply under the DTT PL-DE?

The treaty sets hard ceilings on Polish withholding tax (WHT) for German recipients. Dividends are capped at 5% where the German parent holds at least 10% of the Polish company's share capital for an uninterrupted 24-month period. All other dividend payments face a 15% ceiling. Interest and royalties are capped at 5% each – but only where the beneficial owner is genuinely resident in Germany and the payment is not routed through a conduit structure.

Polish domestic law imposes a 19% or 20% WHT rate on most passive income paid to non-residents. The treaty rate therefore represents a significant saving. However, Polish tax legislation introduced a pay-and-refund mechanism for payments exceeding PLN 2 million per year to a single recipient. Above that threshold, the Polish payer must withhold at the domestic rate and the German recipient claims a refund – a process that can take up to six months and requires a certificate of residence plus a statement of beneficial ownership.

Two issues arise in practice. First, the 24-month holding period for the 5% dividend rate is measured continuously. A restructuring that temporarily reduces the German parent's stake below 10% resets the clock and forfeits the reduced rate – an irreversible consequence for that tax year. Second, KAS has intensified scrutiny of royalty payments between Polish subsidiaries and German IP-holding entities. Payments that cannot be supported by a transfer pricing study aligned with OECD guidelines risk reclassification as hidden profit distributions, triggering the full 20% rate plus interest.

We secured a reduction of a WHT surcharge exceeding PLN 1.8m for a manufacturing client in the Silesia region (autumn 2025). The key was reconstructing the beneficial ownership chain and filing an amended certificate of residence before the KAS audit concluded.

• Confirm the German parent's holding period meets the 24-month threshold before any dividend resolution.
• Obtain an updated certificate of tax residence for each payment year.
• Prepare a beneficial ownership declaration that addresses substance, not just legal title.
• For royalties above PLN 2m, file the WHT refund application within 60 days of the withholding date.
• Align royalty pricing with a current Pillar Two-compliant transfer pricing study.

When does a German company create a permanent establishment in Poland?

A permanent establishment (PE) in Poland gives KAS the right to tax the German entity's Polish-source profits at the standard 19% corporate income tax rate. The DTT PL-DE follows the OECD Model Convention definition: a fixed place of business through which the enterprise carries on its activity wholly or partly. The critical threshold is 12 months for construction sites and installation projects. For other arrangements, there is no minimum duration – a single office or dependent agent can suffice.

Three scenarios generate PE risk most often in Polish-German structures. First, a German company seconds employees to Poland for extended periods and those employees have authority to conclude contracts on the German entity's behalf. Second, a German parent uses a Polish subsidiary as a commissionnaire – the subsidiary acts in its own name but exclusively for the German principal. Third, a German company maintains a server or data centre in Poland that actively participates in core business functions (relevant for IT and e-commerce groups).

The consequences of an unintended PE are severe. KAS may assess corporate income tax on profits attributable to the PE going back five years, add penalty interest at 8% per annum, and impose a surcharge of up to 150% of the unpaid tax. Personal liability of the Polish subsidiary's board members may follow under Polish corporate legislation if the subsidiary facilitated the undisclosed PE. That exposure does not disappear when the German entity pays the back-tax – it survives as a separate civil claim.

For groups with cross-border insolvency risk, the PE question intersects with creditor priority rules. Our analysis of cross-border insolvency involving Poland and Germany explains how an undisclosed PE can affect asset recovery in restructuring proceedings.

What immediate steps should affected businesses take?

The DTT PL-DE has not been renegotiated recently, but KAS enforcement practice has shifted materially since 2023. Three developments demand attention now. KAS has issued binding tax rulings (interpretacje indywidualne) narrowing the definition of beneficial ownership for royalty flows. The Polish Ministry of Finance has updated its transfer pricing guidelines to align with OECD Pillar Two standards. And the National Court Register (KRS) has tightened disclosure requirements for foreign-controlled entities, creating a paper trail that KAS cross-references in WHT audits.

Groups that use IP Box regimes in Poland face an additional layer. The IP Box rate of 5% on qualifying intellectual property income is available to Polish entities, but royalty payments from a Polish IP Box entity to a German parent must still satisfy the DTT PL-DE beneficial ownership test. Failing that test means the German parent pays full German corporate tax on the royalty without a Polish WHT credit – double taxation that the treaty was designed to prevent but does not automatically cure when documentation is missing.

KSeF Poland obligations add a compliance dimension for Polish payers. From 2026, all B2B invoices in Poland must be issued through the National e-Invoice System (Krajowy System e-Faktur, KSeF). Royalty and service fee invoices from German entities to their Polish subsidiaries will be subject to KSeF verification. For the timeline and compliance steps, see our guide on the KSeF deadline timeline for 2026–2027.

Our team obtained a favourable binding ruling for an IT group in the Mazowieckie region (spring 2026), confirming that royalty payments to its German parent qualified for the 5% DTT rate despite a KAS challenge on beneficial ownership grounds. The ruling reduced the group's annual WHT exposure by over EUR 400,000.

Specific steps to take before the next dividend or royalty payment:

• Audit the holding structure against the 10% / 24-month dividend threshold.
• Review all royalty agreements for beneficial ownership documentation gaps.
• Map any German employee secondments against the PE definition in the DTT PL-DE.
• File or update binding tax rulings where KAS practice has shifted since your last review.

Every Polish-German structure that has not been reviewed against current KAS enforcement practice carries exposure. The pay-and-refund mechanism alone can freeze PLN 2m or more in working capital for up to six months – a liquidity cost that compounds if the refund is disputed.

Your specific situation requires an assessment before the next payment cycle. Waiting until KAS opens an audit forfeits the ability to self-correct without penalties – an irreversible consequence under Polish tax procedure.

To receive an expert assessment of your Polish-German tax structure, contact info@kordeckipartners.com. We will review your holding chain, documentation, and payment flows and identify the steps needed to secure treaty protection.

Frequently asked questions

Q: Does the DTT PL-DE automatically apply, or must a German company actively claim treaty benefits?

A: Treaty benefits are not automatic in Poland. The Polish payer must collect a valid certificate of tax residence and, for payments above PLN 2 million per year, file a statement of beneficial ownership before applying the reduced rate. Failure to collect this documentation before payment means the domestic rate applies and a refund claim must be filed separately – a process that takes up to six months and may be challenged by KAS.

Q: How long does a transfer pricing dispute with KAS typically take, and what does it cost?

A: A KAS transfer pricing audit typically runs 12 to 18 months from the first information request to a final assessment. If the assessment is challenged before the Administrative Court (WSA) and then the Supreme Administrative Court (NSA), the total timeline can reach four to five years. Legal and advisory costs for a contested case regularly exceed PLN 500,000, excluding the disputed tax amount and penalty interest.

Q: Is the IP Box regime in Poland compatible with the DTT PL-DE beneficial ownership requirement?

A: Using the IP Box regime in a Polish entity does not by itself satisfy the beneficial ownership test for outbound royalty payments to Germany. The German parent must demonstrate genuine economic substance – actual decision-making over the IP, risk absorption, and financial capacity – independent of the Polish entity's tax position. A tax advisor Warsaw-based or Warsaw-instructed should prepare a substance analysis before any IP restructuring is implemented. Polish tax law and the DTT PL-DE apply simultaneously; neither overrides the other.

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 cross-border tax structuring, treaty compliance, and transfer pricing documentation. We work with Polish entrepreneurs, foreign investors, and in-house legal teams navigating Polish-German tax matters, family foundation planning, and KAS audit defence. 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.