Validate any UK VAT registration number instantly using the official HMRC API.
Enter with or without the GB prefix. E.g. GB123456789 or 123456789
Checking with HMRC...
Valid & RegisteredSource: HMRC API
VAT Number
Business Name
Address
Not a valid UK VAT number
This number was not found in the HMRC VAT register. Double-check the number and try again.
About this tool
This checker uses the official HMRC VAT Registered Companies API — the same system HMRC uses internally. Results are real-time and authoritative.
Why check a VAT number?
Verify a supplier
Confirm a business is genuinely VAT registered before paying invoices with VAT.
Reclaim VAT correctly
HMRC can refuse VAT reclaims if the supplier's VAT number is invalid.
Avoid fraud
Fake VAT numbers on invoices is a common form of business fraud.
Due diligence
A standard check when onboarding new suppliers or clients.
We use cookies to give you the best experience. Learn more