Free EU VAT Number Validator (VIES)

Validate EU VAT number with a free VIES VAT check

This free EU VAT validator lets you quickly check if a VAT number is VALID or INVALID in the official EU VIES system. It is ideal for a first‑line VIES VAT check before issuing an invoice, onboarding a B2B client, or approving a zero‑rated intra‑EU supply.

For audit‑ready evidence and long‑term storage of certificates, create a free VIESAC account to generate PDF certificates and XML technical responses for every VAT number validation. VIESAC keeps a full audit trail of your validate EU VAT number history for 10+ years.

Frequently asked questions about EU VAT number validation

How does this EU VAT number validator work?

The tool sends your VAT number to a backend service that uses cached results, previous audits and the live EU VIES service to return a simple VALID / INVALID status. It is built on the same engine that powers VIESAC’s EU VAT audit trail and certificates.

Is this enough for full VAT compliance?

A quick online VAT number validation is perfect for initial checks, but tax audits often require proof: timestamps, consultation numbers and stored VIES responses. VIESAC generates official‑style certificates and keeps your validation history so you can demonstrate that you validated your EU VAT numbers on time. For price checks, you can also use our VAT Calculator to calculate VAT amount and gross price.