Most foreign founders who register a Finnish company get the formation right and the rest wrong. The company exists. The Y-tunnus arrived by email. The formation platform sent a confirmation. And then, quietly, the obligations that nobody explained began accumulating. Annual reports that were never filed. VAT thresholds that were crossed without registration. Tax changes that passed unnoticed. The cost of fixing these things is always higher than the cost of doing them correctly the first time. This is what we see, regularly, with companies that come to 1Office Finland after a period of neglect. Here is what goes wrong and why.
The formation was the easy part
Registering a Finnish Oy takes a few days. There is no minimum share capital requirement. The process can be handled remotely. The Finnish Trade Register is efficient and digital. For international founders, this accessibility is genuinely one of Finland's strongest attributes as a business location.
The problem is that the ease of formation creates a false sense of completion. The company is registered. The Y-tunnus is in hand. The inbox goes quiet. What most formation platforms and many online guides do not explain clearly enough is that registration is the beginning of a continuous set of obligations, not the end of a bureaucratic process. Those obligations run whether or not the company is trading, whether or not the founder lives in Finland, and whether or not anyone has explained them.
This is the most common and most costly assumption. A Finnish Oy with zero revenue, zero employees, and zero bank transactions during a calendar year is still legally required to prepare and file a full annual report (tilinpäätös) with the Finnish Patent and Registration Office (PRH) within four months of the financial year end. For companies with a December year end, that means 30 April every year without exception.
There is no simplified dormant return in Finland, no exemption for inactivity, and no grace period that excuses non-filing. PRH begins penalty proceedings after eight months, and persistent non-compliance leads to the company being struck from the register. The annual report for a dormant company is simpler and less expensive to prepare than one for an active company, but it is not optional.
They are not. The tilinpäätös (annual report) goes to PRH and becomes a public document. The veroilmoitus (corporate income tax return, Form 6B) goes to Verohallinto via the OmaVero portal and is used for tax assessment. Both are due within four months of the financial year end (30 April for December year-end companies), but they go to separate authorities, serve separate legal purposes, and require separate preparation and submission.
Missing either one triggers a separate penalty process from a different authority. Companies that believe they are compliant because they filed one of the two, without knowing the other exists, are a significant part of the cases we handle. 1Office Finland manages both filings simultaneously as part of the annual report service.
Finland's VAT registration threshold increased from €15,000 to €20,000 on 1 January 2025, as part of the EU SME VAT Directive harmonisation. That is a recent change that many founders operating under older guidance are not aware of. Once annual taxable turnover exceeds €20,000 in a calendar year, VAT registration with Verohallinto becomes mandatory within five days of crossing the threshold. The standard Finnish VAT rate is 25.5% following the September 2024 increase from 24%.
The threshold is assessed on a calendar year basis, not a rolling 12-month period as in some other jurisdictions. A company whose turnover accelerates in Q3 or Q4 can cross the threshold suddenly and already be in a late-registration position before the founder has noticed. Verohallinto treats late VAT registration as a compliance failure regardless of intent. 1Office Finland monitors VAT threshold proximity as part of the monthly accounting service and handles registration before the threshold is crossed where possible.
1Office Finland conducts an initial compliance review for new clients before taking on ongoing accounting.
Finland is cutting corporate tax to 18%. Here is what it means for your Oy
On 28 April 2026, the Finnish Government published a draft proposal to reduce the corporate income tax rate from 20% to 18%, effective from 1 January 2027. The proposal is in parliamentary process and expected to be confirmed in autumn 2026. For companies with a standard December financial year, the 18% rate will apply for the first time to the 2027 accounts filed in spring 2028. Your 2026 accounts, due by 30 April 2027, are still taxed at 20%.
This is the most significant structural change to Finnish corporate taxation since 2014, when the rate was last reduced. After the change, Finland will sit below the EU average corporate tax rate and below the OECD average, further strengthening its position as the lowest corporate tax jurisdiction in the Nordic region.
The part that matters more for most small and growth-stage Finnish companies
Less discussed than the rate cut is the extension of the loss carryforward period from 10 years to 25 years, which applies to losses confirmed in the 2026 tax year and onwards. For any company that has been investing ahead of revenue, operating through the recession years of 2024 and 2025, or building something capital-intensive in Finland, this is structurally significant. Losses that might previously have expired before the company reached profitability can now be carried forward for a generation. Losses from 2025 and earlier still expire after 10 years.
Extended from 10 years. Applies to losses confirmed for the 2026 tax year and later. Losses from 2025 and earlier still expire after 10 years. Correctly documenting and recording your 2026 loss position is now materially more valuable than it was under the previous rules.
For most companies, the new rate takes effect in 2027 and requires no immediate action. But two things need attention before then. First: advance tax collection rules may change from the date the law enters into force in late 2026, which affects companies making significant profit distributions or investments in Q4 2026. Second: any Finnish Oy with accumulated losses needs to ensure those losses are correctly identified, documented, and recorded in the 2026 annual accounts. Under the new 25-year rule, a loss that is improperly recorded or omitted from the 2026 accounts loses 15 years of additional carryforward benefit.
If your company has unresolved bookkeeping from 2024 or 2025, resolving it before the 2026 year-end accounts are prepared is now more valuable than it has ever been.
What specifically trips up foreign founders with Finnish companies
The issues above affect Finnish companies broadly. These ones are specific to foreign founders and internationally managed Finnish Oys, and they come up consistently in the situations 1Office Finland handles.
Finnish accounting must follow Finnish Accounting Standards (FAS) and be filed with Finnish authorities through Finnish-specific portals. The tilinpäätös must be prepared in Finnish, filed with PRH through their e-service, and signed by all board members using qualified electronic signatures. The veroilmoitus is filed through OmaVero using Form 6B. Neither of these is a standard process that a UK, Estonian, or German accountant who has not specifically worked with Finnish companies will handle without difficulty.
This is not a criticism of international accountants. It is a feature of a system designed around Finnish-language documents and Finnish-authority portals. An accountant based in London or Tallinn who takes on a Finnish company as a favour to an existing client is unlikely to produce compliant output reliably over multiple years. The consequences of non-compliance fall on the Finnish company and its directors, not on the advisor. Working with a Finnish-qualified accounting firm from the start is the correct approach.
The tilinpäätös must be signed by all board members and the managing director before it can be filed with PRH. Electronic signatures are accepted and physical presence in Finland is not required. However, the signature must use a qualified electronic signature recognised by PRH. This includes Finnish Mobiilivarmenne, Suomi.fi identification, and certain internationally recognised qualified electronic signature tools.
For companies with board members located in multiple countries, across different time zones, without established digital signing workflows, this step regularly causes delays that push filings past the April deadline. The practical solution is to establish the signing tool and process before the annual report preparation begins, not after the documents are ready. 1Office Finland coordinates the board signature process for all annual report clients and advises on which electronic signature tools are accepted.
Every Finnish company must have a registered business address in Finland listed in the Finnish Trade Register. This is a legal requirement, not a recommendation. The address must be in Finland, must be real and reachable, and is used for all official correspondence from Verohallinto, PRH, and other Finnish authorities. For founders who do not have a physical Finnish presence, a virtual office address from a Finnish service provider satisfies this requirement.
A lapsed or incorrect address registration is one of the triggers for PRH compliance action. If the address associated with your company is no longer valid, because a previous service provider has closed or you have simply lost track of the registration, this is a problem that needs to be resolved immediately rather than assumed to still be active. 1Office Finland provides a Helsinki business address included in all accounting packages and available as a standalone service. View the address service.
Five things your Finnish company should be able to confirm right now
If you have a Finnish Oy and cannot answer yes to all five of the following, there is something that needs attention.
1. Has an annual report been filed for every financial year since incorporation? You can verify this on the Finnish Business Register at ytj.fi, which shows all filed annual reports publicly. If any year is missing, filing late is significantly better than not filing.
2. Do you know your company's current VAT registration status? If your cumulative annual revenue has approached or exceeded €20,000, verify whether your company is VAT-registered with Verohallinto. If it should be and is not, address this immediately.
3. Is your Finnish business address current and active? Check the Trade Register entry for your company. If the address shown belongs to a service provider that is no longer operating, or is an address you can no longer receive post at, update it before PRH flags it.
4. Have all board members been able to sign using a qualified electronic signature in the past? If not, establish the signing capability before the next annual report preparation cycle begins, not during it.
5. Does your accountant know about the 25-year loss carryforward rule for 2026 losses? If your company is likely to confirm a loss in the 2026 tax year, ensure your accountant is aware of the new rule and will record the loss correctly in the accounts to maximise the carryforward benefit.
1Office Finland reviews the compliance status of new client companies before taking on ongoing work. Annual report service available as standalone, even if your bookkeeping is elsewhere.
Sources and references: Finnish Patent and Registration Office (PRH) guidance on annual report filing obligations; Verohallinto (Finnish Tax Administration) guidance on VAT thresholds, OmaVero filing, and corporate income tax; Finnish Government draft proposal of 28 April 2026 on corporate income tax reform; Borenius Legal Alert, April 2026; PwC Finland tax update on loss carryforward extension; Business Finland Investor Confidence Barometer 2026.
