Finland Tax Filing Guide 2026 — OmaVero, Esitäytetty Ilmoitus & May Deadline

filing the Finnish tax return (veroilmoitus). The guide covers: the OmaVero system (Verohallinto's online e-filing portal at vero.fi/omavero — the primary method for filing, supporting both direct electronic access with Finnish banking credentials (verkkopankkitunnukset) or mobile ID (mobiilivarmenne), and the pre-filled return (esitäytetty ilmoitus) which the taxpayer confirms or amends), the filing deadlines (the standard deadline for electronic filing is the first Tuesday in May — May 5, 2026 for the 2025 tax year; the paper filing deadline is typically February of the following year, but OmaVero e-filing extends the deadline to May; taxpayers who receive a pre-filled return with additional time to respond may have a later deadline), the pre-filled return (esitäytetty ilmoitus — Verohallinto pre-populates the return with data from third parties — employers (salary and withholding), banks (interest, dividends, capital gains), pension providers (TyEL, YEL), Kela (benefits), and the Tax Administration's own records (property tax, real estate ownership) — the taxpayer reviews the information online via OmaVero and makes corrections or additions if necessary — the return is considered filed when the taxpayer confirms that the information is correct), the step-by-step filing process (accessing OmaVero with Finnish online banking credentials or mobile ID, reviewing the pre-filled data section by section — earned income (ansiotulo), capital income (pääomatulo), deductions (vähennykset), and tax credits (verohyvitykset) — adding any missing income or deductions — confirming the return — receiving the confirmation receipt), the deductions available (the natural deduction — luonnollinen vähennys — of the employee's social insurance contributions automatically deducted, the work-related expense deduction — työtulovähennys — for employment income, the commuting expenses deduction — työmatkakulut — for travel between home and work, the home office deduction — kotitoimistovähennys — under specific conditions, the mortgage interest deduction on the primary residence — asunnon ostolainan korkovähennys — partially deductible, the trade union and unemployment fund membership fees — ammattiliiton jäsenmaksut — deductible from earned income, the voluntary pension contributions (vapaaehtoinen eläkevakuutus) up to €5,000, the capital losses carried forward from previous years, and the alimony payments if certain conditions are met), the tax calculation (the state income tax (valtionverotus) — progressive rates from 0% to 56.5% on earned income above certain thresholds — the municipal tax (kunnallisvero) — a flat rate set by each municipality, typically 17-23% of earned income — the church tax (kirkollisvero) — approximately 1-2% for members of the Evangelical Lutheran or Orthodox Church — the capital income tax (pääomatulovero) — 30% up to €30,000, 34% above — the health insurance daily allowance contribution (sairausvakuutuksen päivärahamaksu) — approximately 1.36% of earned income), the payment options (direct debit from a Finnish bank account, online payment via OmaVero, bank transfer, or e-invoice (verkkolasku) — the option to pay in instalments (maksujärjestely) for tax debts — the deferral (maksuaika) for temporary financial difficulty — interest on late payment of 7% per year), the amended returns (oikaisuvaatimus — the procedure for correcting an already-filed return within 5 years, using the OmaVero correction service — the late payment interest on underpayments), and the consequences of non-filing (the tax increase penalty (veronkorotus) of up to 30% for late filing, the back-tax assessment for up to 5 years, and criminal prosecution for tax fraud).

The Finnish tax system is highly digitised through the OmaVero portal. All amounts in Euros (EUR). For related reading, see our Rental Income Guide →.

Overview — OmaVero System

OmaVero (vero.fi/omavero) is Verohallinto's online portal for all tax matters. It is the primary filing method for most taxpayers. The features include:

Pre-filled return (Esitäytetty ilmoitus): Verohallinto pre-populates the tax return with data from third-party sources — employers, banks, pension providers, Kela, and other government agencies. The taxpayer reviews the information online and confirms or corrects it.
Access methods: (a) Finnish online banking credentials (verkkopankkitunnukset) — the most common method, (b) mobile ID (mobiilivarmenne), (c) electronic identity card, (d) Katso ID (for businesses).
Languages: Available in Finnish, Swedish, and English.
Services: In OmaVero you can file your tax return, view your tax card, apply for changes, check your tax debt balance, make payments, request refunds, and communicate with Verohallinto.

Filing Deadlines — 2026

The key deadline for the 2025 tax year (filed in 2026) is:

Tuesday, May 5, 2026: The standard deadline for electronic filing via OmaVero. This is the first Tuesday in May. If you file after this date, you may incur a late filing penalty.
Paper filing: The deadline for paper returns is typically in February (February 2, 2026 for the 2025 tax year). Most taxpayers use OmaVero, which gives them the extended May deadline.
Extended deadlines: If Verohallinto sends you a specific request to file by a later date (e.g., if your tax affairs are complex), the deadline will be stated in the notice.
Amended returns: You can file an amended return (oikaisuvaatimus) within 5 years of the original assessment date.

Step-by-Step Filing Process

The process of filing via OmaVero is straightforward:

Step 1 — Access OmaVero: Go to vero.fi/omavero and log in using your online banking credentials or mobile ID.
Step 2 — Review the pre-filled return: The system displays the pre-filled return (esitäytetty ilmoitus). Check each section: earned income (ansiotulot), capital income (pääomatulot), deductions (vähennykset), and tax credits (verohyvitykset).
Step 3 — Add missing information: Add any income or deductions that are not pre-filled. This includes: (a) rental income and expenses, (b) foreign income and foreign tax credits, (c) crypto gains and losses, (d) additional work expenses (commuting, tools, professional literature), (e) mortgage interest on primary residence, (f) trade union fees, (g) alimony payments, (h) charitable donations (if eligible).
Step 4 — Confirm the return: Once all information is complete, confirm the return. The system will calculate the final tax or refund automatically.
Step 5 — Review the tax decision: After filing, Verohallinto processes the return and sends a tax decision (verotuspäätös) within 1-3 months. The decision shows the final tax assessment.
Step 6 — Payment or refund: If additional tax is due, the deadline is typically in July-August of the same year. If you are due a refund, Verohallinto typically pays it in August-September.

Available Deductions

Natural deduction (Luonnollinen vähennys): Automatically deducted — the employee's social insurance contributions (TyEL, työttömyysvakuutus, sairausvakuutus) are deducted from earned income.
Work-related expense deduction (Työtulovähennys): A flat deduction of €620 (for 2025-2026) from earned income, phased out for higher incomes.
Commuting expenses (Työmatkakulut): The cost of travel between home and work, using the cheapest mode of transport. Deductible to the extent that the total exceeds €750 per year. The maximum deduction is €7,000.
Home office deduction (Kotitoimistovähennys): Available if you work from home regularly and your employer does not provide an office space. The standard deduction is approximately €900-€1,200 per year (varies by municipality).
Mortgage interest (Asuntolainan korot): Interest on a loan for the taxpayer's primary residence is partially deductible. The deductible portion is 5% of the interest (reduced from 15% in phases). Interest on a second home is fully deductible against the rental income or as a capital expense.
Trade union and unemployment fund fees: Membership fees for trade unions and unemployment funds are fully deductible from earned income.
Capital losses: Capital losses from the sale of assets (stocks, crypto, property) can be offset against capital gains. Excess losses can be carried forward for 5 years.
Voluntary pension contributions: Deductible from earned income up to €5,000 per year.

Tax Calculation

The total tax on earned income (ansiotulo) for a Finnish resident consists of:

State income tax (Valtionverotus): Progressive rates: 0% on the first ~€20,000, 6% on €20,001-€31,000, 17.25% on €31,001-€50,000, 21.25% on €50,001-€92,000, 31.25% on €92,001-€150,000, and 34% above €150,000 (plus an additional solidarity tax of ~2% on income exceeding €50,000). The combined top marginal state rate is approximately 56.5% when municipal and church taxes are included.
Municipal tax (Kunnallisvero): A flat rate set by the municipality, typically between 17% and 23% of earned income.
Church tax (Kirkollisvero): Approximately 1-2% for members of the state churches.
Health insurance contributions: The daily allowance contribution (~1.36%) and the medical care contribution (~0.68%) are added to earned income tax.

Capital income (pääomatulo) is taxed separately at 30% up to €30,000 and 34% above that threshold.

Frequently Asked Questions

Do I need to file a tax return if my only income is from employment and all taxes were withheld?

If the pre-filled return (esitäytetty ilmoitus) shows all your income and deductions correctly, you do not need to actively file — the return is considered accepted when you do nothing. However, if there is any missing income (e.g., crypto gains, rental income, foreign income) or deductions you are entitled to claim, you must file an amendment via OmaVero by the May deadline.

Can I file my Finnish tax return in English?

Yes. OmaVero is available in English (as well as Finnish and Swedish). The instructions, the pre-filled return, and the filing process can all be completed in English. If you need personalised assistance, Verohallinto provides telephone and online chat support in English. You can also seek help from a Finnish tax advisor (veroasiantuntija).

How do I get a refund if I overpaid tax?

If your tax return shows that you overpaid tax (the amount withheld exceeds your final tax liability), Verohallinto automatically refunds the excess to your Finnish bank account. Refunds are typically paid in August-September of the same year. If you do not have a Finnish bank account, Verohallinto will send a cheque or transfer to a foreign account (which may incur delays and bank fees). You can check the refund status in OmaVero.

What happens if I do not file or file late?

If you file after the May deadline, Verohallinto imposes a late filing penalty (veronkorotus) of up to 30% of the underpaid tax, depending on the delay. Late filing interest (viivästyskorko) of approximately 7% per year applies to any underpaid tax from the original due date. If you do not file at all, Verohallinto will make an estimated assessment (arvioverotus) based on available information, which typically results in a higher tax. Criminal prosecution for tax fraud is possible in cases of intentional non-compliance with significant underpaid tax.

Can I amend my tax return after filing?

Yes. You can file an amended return (oikaisuvaatimus) within 5 years of the original assessment date. The correction is made via OmaVero — select the year and the item you want to correct. If the correction results in additional tax, you must pay the additional amount plus late payment interest. If it results in a refund, Verohallinto will process it with interest from the original filing date.

Disclaimer

This guide is for informational purposes only and does not constitute legal or tax advice. Tax filing requirements, deadlines, and procedures are subject to change. Consult a qualified Finnish tax advisor (veroasiantuntija) for advice tailored to your specific circumstances. The information reflects the rules applicable to the 2025 tax year (filed in 2026) as of the date of publication.