Sweden VAT number: format and validation

By Remco from Avatcado

Format

SE followed by 12 digits. The local term is momsregistreringsnummer (momsnummer, Swedish).

Pattern: /^\d{12}$/

  • Built from the 10-digit organisationsnummer (or personnummer for sole traders) plus a suffix; the last two digits are always 01
  • Digits only, no letters

Example of a registered number: SE556703748501

Check a Sweden VAT number

Checks route through VIES. Caching is enabled by default. Read the source, original result time and freshness label alongside validity; a cached or stale result does not freshly confirm current registration.

Enter a VAT number to see its registration result, source and freshness

Validate via API

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

curl "https://api.avatcado.com/v1/validate?vat_number=SE556703748501" \
  -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: "SE556703748501",
});

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.

How Avatcado validates Sweden numbers

  • Primary source: VIES.
  • Company name and address: yes, observed 2026-09-04.
  • When VIES is down: the most recent cached result, then a refunded 503.

See the full coverage table.

Frequently asked questions

Why do Swedish VAT numbers always end in 01?

The momsregistreringsnummer is the organisation number with 01 appended; Skatteverket states the final two digits are always 01. If a candidate number ends in anything else, it is malformed.

When must a Swedish business register for moms?

Since 1 January 2025 businesses with annual turnover of at most SEK 120,000 (raised from SEK 80,000) can stay outside VAT; above that, registration with Skatteverket is mandatory.

How does Avatcado validate Sweden VAT numbers when VIES is down?

For Sweden VAT numbers, uncached checks use VIES, the EU's VAT Information Exchange System, which routes the query to Sweden's own national database. Caching is enabled by default without a requester VAT number. Read the freshness label and original result time to distinguish a new lookup from a previous result. A valid answer includes the registered company name and address that Sweden's tax administration publishes through VIES, which we last confirmed against a real registered number on 2026-09-04. No national register is published for Sweden that Avatcado can consult as a substitute, unlike the ten EU countries with a national fallback on Pro and Business, so an availability fault such as MS_UNAVAILABLE or a timeout can be answered only by eligible cache. A stored result has meta.cached: true and meta.source_status: "unavailable", plus meta.stale: true when it is past the cache window. Requester checks disable stored responses by default; cache=true opts back in. If no eligible stored result can answer, the request returns a refunded 503 (upstream_member_state_unavailable). A cached or stale result is earlier registration evidence, not a fresh check.

Related guides

VAT rate in Sweden

The standard VAT rate in Sweden is 25%. Reduced rates: 12%, 6%. See all Sweden VAT rates.

Sources