Finland's tax administration has expanded its reporting obligations for foreign entities with taxable connections to the country. International businesses that have previously operated with minimal Finnish filing requirements may now face significantly broader disclosure duties. Entities that miss the new deadlines risk substantial penalties and reputational exposure with Finnish authorities.
Finland has introduced enhanced tax reporting requirements affecting foreign entities with income sourced in Finland, effective for financial periods beginning on or after 1 January 2025. The changes extend filing duties to entities with a kiinteä toimipaikka (permanent establishment) in Finland, as well as those receiving passive income subject to Finnish withholding tax. Compliance returns must be submitted to the Verohallinto (Finnish Tax Administration) within four months of the end of the relevant financial period.
This alert explains which business categories are affected, the threshold criteria that trigger reporting duties, the key compliance deadlines, and the immediate steps international companies should take now.
What has changed and when it takes effect
Finland's tax legislation has been amended to align domestic reporting rules with EU mandatory disclosure directives and updated OECD standards on base erosion. The changes took effect for financial periods starting on or after 1 January 2025.
Three developments are directly relevant to foreign entities. First, the definition of permanent establishment under Finnish tax legislation has been clarified and, in certain respects, broadened. Digital service providers and platform operators that maintain a sustained economic presence in Finland – even without a physical office – may now meet the threshold for a taxable permanent establishment.
Second, the withholding tax regime on dividends, royalties, and interest payments to non-resident entities has been updated. Foreign recipients of such payments are now required to self-assess and report their tax residency status directly to the Verohallinto where a tax treaty reduction or exemption is claimed. Passive reliance on the Finnish payer to withhold the correct amount is no longer sufficient.
Third, corporate income tax returns filed by foreign entities with a Finnish permanent establishment must now include a detailed country-by-country breakdown of intra-group transactions. This requirement applies to groups above the relevant consolidated revenue threshold set in Finnish tax legislation.
Which entities are affected and threshold criteria
The new rules apply to a broad range of foreign entities. The following categories face direct reporting obligations:
- Foreign companies with a permanent establishment in Finland, including those established through dependent agents
- Non-resident entities receiving Finnish-source dividends, royalties, or interest where a tax treaty benefit is claimed
- Multinational groups above the consolidated revenue threshold that have Finnish subsidiaries or branches
- Foreign digital service providers with a material user base or revenue stream in Finland
The permanent establishment test remains the central threshold. Under Finnish tax legislation, a permanent establishment arises where a foreign entity has a fixed place of business in Finland for a defined minimum period – generally six months or more. Courts in Finland have consistently held that the substance of activities, not merely the formal structure, determines whether a taxable presence exists. A foreign company whose employees regularly conclude contracts in Finland on the company's behalf may trigger this threshold even without a registered branch.
Tax residency status is also relevant. Foreign entities that claim non-resident treatment to benefit from reduced withholding tax rates under a tax treaty must now actively document and certify that status each reporting period. A certificate of tax residency issued by the home-country authority remains the primary instrument. However. The Verohallinto now requires that it be accompanied by a self-declaration confirming that the beneficial owner conditions under the applicable tax treaty are met.
Entities that fall below all thresholds but nonetheless receive Finnish-source income should conduct a precautionary review. Changes in business model, new Finnish customers, or revised intra-group pricing arrangements can all shift an entity's position without prior warning.
For a full assessment of your Finnish tax position and exposure under these new rules, contact us at info@ferrazwhitmore.com.
Immediate action items for international companies
The compliance window is short. Entities whose financial period follows the calendar year face a filing deadline in late April 2026 for the 2025 period. Those with non-standard financial years should calculate their own deadline from the four-month rule.
The following five steps should be prioritised now:
- Conduct a permanent establishment review. Map all activities, personnel, and contracts connected to Finland. Assess whether any of these create a taxable presence under the updated definition in Finnish tax legislation.
- Verify withholding tax treaty positions. Confirm that each Finnish-source payment stream – dividends, royalties, interest – is correctly classified. Obtain updated tax residency certificates and prepare the new beneficial ownership self-declarations required by the Verohallinto.
- Review intra-group transaction documentation. If your group exceeds the consolidated revenue threshold, ensure that Finnish-related transfer pricing documentation and country-by-country reporting records are current and complete.
- Register with the Verohallinto if required. Foreign entities newly caught by the expanded permanent establishment definition must register for corporate income tax purposes before filing. Late registration itself carries a separate penalty exposure.
- Consult specialist legal and tax advisers. The interaction between Finnish corporate income tax obligations, applicable tax treaty provisions, and EU directive requirements involves several layers of analysis. Engaging a specialist in Finnish tax law at this stage avoids costly corrections later.
Foreign entities with existing Finnish operations should also review whether the updated rules affect previously filed returns. Where an earlier position is now considered inconsistent with the clarified permanent establishment definition, a voluntary disclosure to the Verohallinto can substantially reduce penalty exposure. Proactive engagement with Finnish tax authorities is treated more favourably than a corrected filing made after an audit trigger.
Companies managing both Finnish and broader Nordic or EU corporate structures may also find it useful to review Finnish corporate law requirements alongside their tax obligations. Since branch registration and substance requirements interact directly with the permanent establishment analysis.
For parallel developments in other EU jurisdictions, our alert on tax reporting changes in Portugal provides a useful comparative reference.
About Ferraz & Whitmore
Ferraz & Whitmore is an international law firm based in Lisbon, advising business clients across 46 jurisdictions. Our tax law practice covers corporate income tax structuring, withholding tax compliance, permanent establishment analysis, and tax treaty planning across European and international markets. We regularly advise foreign entities entering or already operating in Finland on their Finnish and cross-border tax reporting obligations. As a law firm in Finland and across the Nordic region, our team combines civil law and common law expertise to deliver clear, actionable guidance. The firm's Lisbon base provides direct access to EU regulatory channels, while our broader network supports enforcement and advisory work across 15 practice areas. Engaging a lawyer in Finland with genuine cross-border experience makes a material difference when reporting obligations span multiple legal systems. To discuss your Finnish tax reporting position, contact us at info@ferrazwhitmore.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. Ferraz & Whitmore 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@ferrazwhitmore.com.