Five key items to check on your Finnish tax return before the deadline

About 1.4 million Finns must verify their pre-filled tax returns by today’s deadline, according to a report by Finnish public broadcaster Yle. While the Tax Administration automatically includes wage income and capital gains from banks and investment funds, many deductions and additional income sources must be reported manually.

The Taxpayers’ Association of Finland provided five essential reminders for last-minute filers, based on recent changes to tax rules.

1. Company car benefit adjustments

The standard value of a company car includes an allowance for 18,000 km of private use annually—covering commutes, second-home trips, and other personal travel. If actual private mileage is less than 18,000 km, taxpayers can request a reduction in the car’s taxable benefit. For the first time, the Tax Administration also asks whether private use exceeded 18,000 km—if so, this must be reported separately to avoid underpayment.

2. Child support deductions

Child support payments are not directly deductible, but they may qualify for a child maintenance obligation deduction. Taxpayers must actively claim this on their return and provide either a court order or a social welfare board–approved agreement as proof. The deduction equals one-eighth of paid support, capped at €80 per child.

3. Cryptocurrency transactions

Capital gains or losses from cryptocurrencies do not appear automatically on pre-filled returns. Starting next year, the Tax Administration will receive broader data from crypto service providers, increasing the risk of penalties for unreported transactions. Taxpayers must currently self-report all crypto-related income.

4. Reduced household expense deduction

The maximum household expense deduction has been lowered. Taxpayers can now deduct 35% of the VAT-inclusive cost for services like home repairs, cleaning, or care work in their primary residence, secondary home, or parents’ property. The annual cap is €1,600 per person, with a €150 personal liability threshold. To reach the maximum deduction, invoiced work must total at least €5,000.

5. Rental income from platforms like Airbnb

Income from renting property—including short-term platforms like Airbnb—is taxable as capital gains and must be reported manually. The Tax Administration cross-checks data with platforms, so omissions risk detection. Failure to declare rental income may result in penalties or back taxes.

Today is the final day for corrections to pre-filled 2023 tax returns in Finland.