VAT returns in Finland: deadlines for a sole trader
If you run a toiminimi in Finland and you are in the VAT register, one date decides your month: the 12th. Here is what the VAT return asks of you, when it is due, what a late one costs, and how to correct one you have already filed.
Who has to file
You file VAT returns once you are in the VAT register. Registration is compulsory as soon as your turnover for the calendar year passes 20 000 euros, the limit in force since the start of 2025. Liability starts on the day your turnover passes it, not from the beginning of the year, so the number to watch is the running total rather than the year-end figure.
Under the limit you can still register voluntarily. That is often worth it when your customers are businesses and your own costs carry VAT you would rather deduct.
One thing that has changed and still surprises people: the lower-limit relief, alarajahuojennus, ended on 1 January 2025. If you remember getting part of your VAT back after a small year, that relief no longer exists.
Your tax period sets the rhythm
How often you file depends on your tax period:
- Every month. The default for everyone.
- Every quarter. Available when your turnover stays under 100 000 euros a year.
- Once a year. Available when your turnover stays under 30 000 euros a year.
A longer period means fewer filings, not less bookkeeping. The receipts still have to be entered, and a year of them arriving at once is how deductions go missing. You request a longer period in MyTax, and it takes effect from the start of the next period, so plan it before the year turns.
The deadline: the 12th, two months later
For a monthly or quarterly period, the return and the payment are both due on the 12th day of the second month after the period ends. If the 12th falls on a Saturday, Sunday or a public holiday, it moves to the next business day.
- January, filed by 12 March
- February, filed by 12 April
- January to March, filed by 12 May
If your period is the calendar year, the return is due by the last day of February in the following year.
Filing and paying are two separate acts with the same deadline. A return filed on time and paid a week late still collects interest, and money paid without a return does not fix anything either.
Nothing to report is still a report
A quiet month does not cancel the return. If you had no VAT-liable activity in the period, you file anyway and report "no activities during the tax period". This is the single most common reason a small business hears from the Tax Administration: not unpaid VAT, just a return nobody sent.
What a late return costs
The late-filing penalty on a VAT return runs at 3 euros a day up to 135 euros for the first 45 days. After that it becomes 135 euros plus 2 % of the tax you filed late, capped at 15 000 euros per tax.
On top of the penalty, late-payment interest runs from the due date until the day you pay. The Tax Administration sets that rate each year, so check the current one rather than assuming last year's.
Correcting a return you already filed
You correct a VAT return by filing a replacement return for that same period, with every figure again, not only the one that changed. Do it within 45 days of the original due date and there is no late-filing penalty.
Two shortcuts are worth knowing. An error of 500 euros or less in the tax amount can be adjusted on your next return instead, as long as you do it before that next due date. And an error that does not change the tax at all, such as sales at 0 % or sales to other EU countries, always needs a replacement return whatever its size.
How we keep it boring
The deadline is only stressful when the bookkeeping is behind it. For our clients the month runs the same way every time: receipts and statements come to us, we do the bookkeeping, we tell you the VAT amount before the due date, and we file. You get the number in time to pay it, and the quiet months get their "no activities" return without anyone having to remember.
See what we do, or book an introduction and bring one month of receipts. That is usually enough to see where you stand.
Sources
- Tax Administration: VAT, when to file and pay
- Tax Administration: tax period and changing it
- Tax Administration: late penalty charges on self-assessed taxes
- Tax Administration: VAT liability and registration
- Tax Administration: VAT relief scheme, ended 1 January 2025
Please note: this is general information about Finnish rules, not advice for your own situation, and the rules change. Ask us before you act on it.
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