Hungary VAT number: format and validation

By Remco from Avatcado

Format

HU followed by 8 digits. The local term is kozossegi adoszam (community tax number) (adoszam, Hungarian).

Pattern: /^\d{8}$/

  • The domestic tax number is 11 digits written xxxxxxxx-y-zz; only the first 8 digits with the HU prefix form the EU VAT number, never with hyphens
  • VAT-group members can carry a group-level community VAT number that differs from their own tax number, so deriving the HU number from an invoice's 11-digit tax number can be wrong

Example of a registered number: HU10484878

Check digit

Hungary VAT numbers carry a check digit (Weighted MOD 10): Each of the 8 digits is multiplied by the weights 9,7,3,1,9,7,3,1 and the total must be divisible by 10, making the 8th digit the check digit.

Check a Hungary VAT number

Validated live against the NAV (National Tax and Customs 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=HU10484878" \
  -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: "HU10484878",
});

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 alanyi adomentesseg threshold in Hungary?

Hungary's subjective VAT exemption ceiling rises to HUF 20 million from 2026, with NAV announcing HUF 22 million for 2027 and HUF 24 million for 2028. Businesses under the ceiling can opt out of charging VAT by declaring the choice to NAV by December 31 of the prior year.

How can I check a Hungarian tax number?

NAV publishes taxpayer databases on nav.gov.hu, including lists of VAT-registered taxpayers and a community VAT number confirmation service. The 8-digit HU number can also be validated in VIES, which returns the registered name and address.

Related guides

VAT rate in Hungary

The standard VAT rate in Hungary is 27%. Reduced rates: 18%, 5%, 0%. See all Hungary VAT rates.

Sources