Finland VAT number: format and validation

By Remco from Avatcado

Format

FI followed by 8 digits. The local term is arvonlisaveronumero (ALV-numero, Finnish) or momsnummer (momsnummer, Swedish).

Pattern: /^\d{8}$/

  • Formed from the Business ID (Y-tunnus) by dropping the hyphen: 0112038-9 becomes FI01120389
  • The Y-tunnus is issued through the joint PRH and Tax Administration Business Information System (YTJ)

Example of a registered number: FI01120389

Check digit

Finland VAT numbers carry a check digit (Weighted MOD 11): The last digit is a check computed from the first seven digits with weights 7,9,10,5,8,4,2, subtracting the remainder from 11.

Check a Finland VAT number

Validated live against the Verohallinto (Finnish Tax Administration) (official register).

Enter a VAT number to see the live API response

Validate via API

The same validation as an API call, with the example number above:

curl "https://api.avatcado.com/v1/validate?vat_number=FI01120389" \
  -H "Authorization: Bearer avat_live_your_api_key"
import Avatcado from "@avatcado/node";

const avatcado = new Avatcado("avat_live_your_api_key");
const { data, error } = await avatcado.vat.validate({
  vatNumber: "FI01120389",
});

if (data?.data.valid) {
  console.log(`Registered: ${data.data.company?.name}`);
}

Free tier includes 500 validations per month. Get an API key or read the API documentation.

Frequently asked questions

What is the VAT registration threshold in Finland?

EUR 20,000 of annual turnover since 1 January 2025, up from EUR 15,000; the partial threshold relief scheme was abolished at the same time.

How do I look up a Finnish VAT number?

Search the YTJ company register (ytj.fi) by name or Business ID; each company page shows whether it is in the VAT register. Convert the Business ID to the VAT number by removing the hyphen and adding FI.

Related guides

VAT rate in Finland

The standard VAT rate in Finland is 25.5%. Reduced rates: 13.5%, 10%. See all Finland VAT rates.

Sources