International Tax 2026

FINLAND Law and Practice Contributed by: Petteri Rapo, Markku Renko, Henri Becker and Jaakko Niskala, Svalner Atlas Finland

a treaty applies. In cross‑border cases, this means that the domestic classification is the starting point, but treaty residence tests can become relevant where dual residence arises. The same guidance emphasises that domestic resi - dence/non‑residence is assessed under the Income Tax Act and that treaty residence analysis is relevant primarily where the treaty’s residence concept must be applied alongside domestic status (eg, in dual‑res - idence situations). 2.2 Tax Residence of Individuals An individual is treated as Finnish tax resident if they have their permanent home in Finland or if they stay in Finland for a continuous period of more than six months. Finnish citizens who move abroad are gener - ally subject to the three-year rule, under which they remain Finnish tax resident during the year of depar - ture and the following three tax years unless they can demonstrate they no longer have “essential ties” to Finland. “Essential ties” refers typically to maintain - ing a permanent home in Finland, a spouse living in Finland, ownership of Finnish real property (beyond a summer cottage) and certain ongoing economic or work connections. The Finnish Tax Administration’s dedicated guid - ance on the three‑year rule highlights that changing to non‑resident status during the three‑year period generally requires a specific request and evidence that economic and social ties have ceased; it also provides indicative examples of ties that often keep residency in place, such as ongoing Finnish social security cov - erage or continuing to run a business or perform work in Finland. 2.3 Taxation of Resident Individuals Finnish tax residents are, as a starting point, taxed on worldwide income, but treaty rules and domestic mechanisms can mitigate double taxation. In cross- border contexts, Finland’s approach is to determine domestic liability first and then apply treaty and pro - cedural mechanisms (including treaty benefits where conditions are met). Finnish Tax Administration residency guidance expressly describes residents as having “unlimited”

tax liability in Finland (worldwide income), while also noting that treaty residence rules may become rel - evant where the treaty requires determining residence under treaty criteria in addition to domestic law. 2.4 Taxation of Non-Resident Individuals Non-resident individuals are taxed in Finland on Finn - ish-source income, commonly through tax at source. Finnish Tax Administration guidance on cross-border dividends/interest/royalties explains that non-resident status limits Finland’s taxing rights and that treaty benefits may reduce Finnish tax at source where eli - gibility can be demonstrated. In practice, treaty relief at source generally requires that the income beneficiary is identified and that eli - gibility for treaty benefits is verified using reasonable measures (eg, a certificate of residence or an investor self‑declaration in the relevant withholding tax con - text). 2.5 Tax Residence of Legal Entities A company is resident in Finland if it is incorporated/ registered in Finland. In addition, foreign corporate entities may be treated as Finnish resident taxpayers if their place of effective management is in Finland. Finnish Tax Administration guidance explains that “place of effective management” refers to where the corporate entity’s board or other decision‑making body makes top‑level decisions on daily manage - ment, taking into account the broader facts of the organisation and operations. It also distinguishes this resident‑taxpayer concept from situations where a “place of management” may instead create a Finnish permanent establishment for a non‑resident foreign company. 2.6 Definition of Permanent Establishment For income tax purposes, the concept of permanent establishment (PE) stems from the tax treaties and is aligned with the OECD Model; ie, a PE is defined as a fixed place of business through which the business of an enterprise is wholly or partly carried out. Potential variations in certain details (such as time thresholds) are treaty-specific.

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