VAT Validator
Check any UK VAT number against HMRC's live register in seconds. Confirm the registered business name, address and validity before you pay an invoice.
- Official Public Data
- Live HMRC & Companies House Sync
- No Sign-up Required
Live HMRC & Companies House Sync
- 01VAT Number (VRN) — Valid VAT Registration / Invalid / Deregistered VAT
- 02Registered Business Name — Official Business Address
- 03Download Verification PDF — Copy Summary
Frequently Asked Questions
How does the UK VAT number check work?
Enter the 9-digit VAT number shown on the invoice (GB prefix optional). We query the official HMRC VAT lookup service and return whether the number is currently registered, along with the registered business name and address.
What is a valid UK VAT number format?
Standard UK VAT numbers consist of 9 digits, commonly prefixed with "GB" (for example GB 123 4567 89). The first digit may be a 0, and some historical numbers are shorter — enter the full number as shown on the invoice.
Where does this data come from?
All business records are retrieved from the UK Government public registers: Companies House and HM Revenue & Customs (HMRC). Postcode data comes from the Office for National Statistics via Postcodes.io.
Is this service free to use for B2B checks?
Yes. Single checks via web search are free and require no sign-up. Automated bulk queries can be executed via our high-speed API for developers and risk teams.