HMRC VAT validation check
Before you pay a UK supplier, approve a B2B invoice, or reclaim input VAT, you need proof the GB VAT number is genuine and currently registered. An HMRC VAT validation check queries HM Revenue & Customs live and returns valid or invalid status plus the registered business name and address on file — free, online, and done in seconds.
What is an HMRC VAT validation check?
HMRC maintains the official registry for all UK VAT registrations. A HMRC VAT validation lookup confirms whether a GB number is active at the moment you search — not weeks or months ago. Since Brexit, UK numbers are no longer checked through the EU VIES system; every validate VAT number HMRC request goes directly to the tax authority's database.
Enter the full number including the GB prefix — for example GB116300129 — and submit. A successful official HMRC VAT check returns the company name and address HMRC holds, which you compare to your supplier before releasing funds.
How to run an HMRC VAT check online
The fastest route is a dedicated tool that sends a live query to HMRC on your behalf. Use our free VAT checker on Check VAT Number for instant results with no account required. For step-by-step guidance, read how to verify a UK VAT number online, GB VAT checker, and how VAT validation works.
GB format rules and common invoice mistakes are covered in UK VAT numbers. Wondering if validation is free? See is there a free service to validate a VAT number for UK businesses?
What an HMRC VAT verification returns
A successful HMRC VAT verification tells you whether the registration is currently valid. When valid, you receive the registered business name and address — match those details to the supplier on your invoice, not to an email signature alone. An invalid result means you should pause payment until the number is clarified. Follow what to do if a VAT number is invalid and read why you should verify VAT numbers before every B2B transaction.
HMRC vs VIES — know which check to run
An HMRC VAT check online applies only to GB numbers. EU member state prefixes — IE, DE, FR, and others — require VIES validation instead. UK businesses trading across both markets need both workflows. Read VIES vs HMRC: what's the difference? and VIES VAT checker UK for EU lookups from Britain.
When to run an HMRC GB VAT validation
Build a HMRC GB VAT validation step into supplier onboarding, accounts payable, and high-value invoice review. Run a UK HMRC VAT lookup before the first payment to any new B2B partner — not after a dispute arises. Fraud prevention tips are in how to spot VAT invoice fraud. Related guides: check VAT number in UK, how to check a VAT number for a company, and our FAQ.
Run a free HMRC VAT validation check now
Whether you need a one-off HMRC VAT number validation or a regular compliance workflow, the process takes seconds. Visit the Check VAT Number homepage, enter the full GB number, and get instant official results — or browse more UK guides on our blog.