A toiminimi (a Finnish sole trader business, also called a private trader) is liable for VAT on the same rules as a limited company (Oy). You must register for VAT when your turnover goes over €20,000 in a calendar year, and you can register voluntarily below that. Your business form does not change the VAT rates, the right to deduct or the due dates. Three things still work differently in practice: the threshold is often crossed mid-year, the line between business and private use is genuinely blurry, and VAT is easy to mistake for your own money because the business account and your personal account sit so close together.

In Finnish, VAT is arvonlisävero, or ALV. You handle it in OmaVero, the Finnish Tax Administration's (Verohallinto) online service, under your business ID (Y-tunnus). For the full system, see the complete guide to VAT in Finland.

Does a toiminimi have to register for VAT?

A toiminimi must register for VAT once turnover in the current calendar year goes over €20,000.

The threshold is checked against both the current and the previous calendar year. If neither goes over €20,000, your sales are VAT-exempt as small-scale business. It is always the calendar year, even if your financial year differs.

Liability starts on the day you cross the threshold, and the sale that takes you over it is taxable in full. The edge cases are covered in when you must register for VAT in Finland.

How does a toiminimi register for VAT?

You register in OmaVero or with an electronic notification through YTJ, the Finnish Business Information System. Voluntary registration takes effect at the earliest from the date your notification arrives and cannot be backdated. Mandatory registration after crossing the threshold is made retroactively from the day the threshold was exceeded.

Read that twice. If you crossed the threshold on 3 March and filed on 20 April, you still owe VAT on the sales in between, because the liability arose by law on 3 March. That means correcting invoices or paying the VAT out of your own margin. In reverse, deregistration takes effect from the date your request arrives, never retroactively.

Should a toiminimi register for VAT voluntarily?

Voluntary registration is worth working out when your customers are businesses.

A VAT-registered customer deducts the VAT itself, so your price does not effectively rise, and you get to deduct VAT on your own purchases. This is the usual case for consultants, developers and designers invoicing companies. Once registered, you pay VAT on all business sales, however small.

Which VAT period should a toiminimi choose?

The default is a monthly period. You can choose a quarterly period if turnover is at most €100,000, and a calendar-year period if turnover is at most €30,000.

A chosen period must be kept for at least a year, and moving to a longer period takes effect from the start of the next calendar year.

A longer period means fewer filings, but quarterly VAT is three months of VAT paid in one go. Choose by cash flow, not by convenience.

Why is VAT not the sole trader's money?

VAT is not business income. It is money collected from your customer that passes through your business to the state.

This bites a toiminimi harder than an Oy, because a sole trader takes money out as private drawings (yksityisotot) with no payroll rhythm, and nothing marks the collected VAT as separate.

The simplest habit is to move the VAT share of each sales invoice aside as soon as the payment lands. At 25.5%, €255 of a €1,255 invoice is not yours. That is much easier than trying to find the full amount on the due date.

How does private use affect a toiminimi's VAT?

When you take business goods or services for private use, the earlier deduction is adjusted and VAT is due on the private use.

Sole traders get a relief here that a limited company does not. Minor private use by a natural person, a spouse, an estate of a deceased person or a tax partnership is excluded when it is about €850 a year or less. Below that, no VAT is due on the private use.

How do you split a phone, laptop or home office between business and private use?

For a mixed-use purchase you can deduct only the business share, and you must be able to justify the split.

The most defensible basis is a documented ratio, such as workspace floor area against the whole flat. A round estimate is easy to write and hard to defend.

Passenger cars have a strict rule of their own. The full list of restrictions is in which purchases you can deduct VAT on.

What happens if a toiminimi files the VAT return late?

The late-filing penalty is €3 for each day the return is late, up to €135. For a return more than 45 days late, 2% of the tax reported on it is added, up to a maximum of €15,000.

You file a return for every period, including a zero return for quiet months. Worked examples are in Finnish VAT return deadlines and late-filing penalties.

How does a toiminimi handle VAT without a quarterly scramble?

Sole-trader VAT is hard work when the numbers are dug up just before the due date, even though your invoices, receipts and bank transactions already hold everything.

NoCFO is the all-in-one AI-native finance platform for entrepreneurs and founders. Invoicing, bookkeeping and reconciliation sit in one platform, and the figures for each VAT period build up from the bookkeeping automatically. Luca, AI CFO, tells you what the numbers mean and what to do next.

A sole trader knows their own work inside out. The problem is keeping the finances current on top of everything else, and the finances staying a black box to the person who owns them.

FAQ

When does a toiminimi have to register for VAT in Finland?

When turnover in the current calendar year goes over €20,000. Liability starts on the day the threshold is crossed.

Can a toiminimi operate without VAT registration?

Yes, if turnover in both the current and the previous calendar year is €20,000 or less. Sales are then VAT-exempt as small-scale business.

From which date does VAT registration start?

Voluntary registration starts at the earliest on the date the notification arrives and is not backdated. Mandatory registration is made retroactively from the day the threshold was crossed, because the liability started on that day.

Does a toiminimi have to file a VAT return with no sales?

Yes. A VAT-registered business files a return for every period, including empty ones.

How much can a sole trader take for private use without VAT?

Minor private use of about €850 a year or less is excluded from VAT for natural persons.

See what a toiminimi's VAT period looks like when the figures are ready and nothing has to be compiled by hand. Start for free at nocfo.io.

Sources (checked 28 September 2026)

• Verohallinto: VAT exemption for small businesses (€20,000 threshold on current and previous calendar year, liability from the day the threshold is exceeded, registration via OmaVero or YTJ, voluntary registration and deregistration)

• Verohallinto: Tax period (€100,000 and €30,000 limits, one-year minimum, change from start of calendar year)

• Verohallinto: Goods or services diverted to private use (about €850 a year for natural persons, product samples)

• Verohallinto: Late-filing penalty for self-assessed taxes (€3 a day up to €135, plus 2% after 45 days, maximum €15,000)