VAT number format & decoder

Decode a GB VAT number digit by digit and verify the mod-97 checksum — no sign-up.

Updated 2026-06-30 · Official source: gov.uk · Live data from HMRC

More tools

Find a VAT number by company name

Search Companies House for a business, then confirm its VAT number with HMRC.

Bulk VAT number check

Validate many UK VAT numbers at once.