What is a UK VAT registration number and how is it structured?
A UK VAT registration number (VRN) is a unique identifier issued by HMRC to each VAT-registered business in the UK. Standard VRNs consist of the prefix 'GB' followed by 9 digits (e.g., GB123456789). Branch traders use a 12-digit format (GB followed by 12 digits). Government departments use GB followed by GD and 3 digits; health authorities use HA followed by 3 digits. VRNs must appear on all VAT invoices issued by UK VAT-registered businesses.
How can a UK VAT registration number be validated?
UK VRN validation methods: (1) Format check: 9 digits after GB prefix, optionally 12 digits for branch traders; (2) Check digit: 9-digit VRNs use a modulus 97 check digit algorithm on the first 7 digits; (3) HMRC VAT number checker: available at HMRC's online services; (4) VIES: for UK VRNs, VIES may no longer return live results post-Brexit for EU-facing validation (UK is not in EU VIES). For UK-to-UK validation, HMRC's API is the authoritative source. Businesses should validate VRNs at supplier onboarding and periodically thereafter to catch deregistrations.
Frequently Asked Questions
- What should a buyer do if a supplier's UK VRN is invalid?
- If a UK VRN fails validation: (1) Contact the supplier to verify the number and request correction; (2) Do not recover input VAT on invoices with an invalid VRN until corrected; (3) If the VRN cannot be confirmed valid, report the issue to HMRC (potential VAT fraud); (4) Suspend payments to the supplier until the VRN is confirmed. An invalid VRN may indicate the supplier is not registered for VAT and should not be charging VAT, in which case the VAT charged is not deductible as input tax.
- Can a business have multiple UK VAT registration numbers?
- Generally no. A single legal entity has one UK VAT registration number. However, corporate groups can apply for VAT group registration, creating a single group VRN for all members. Alternatively, separate legal entities in a group each have their own VRN. Branch registrations (for foreign businesses with UK branches) may use the 12-digit format. Businesses that operate in both Great Britain and Northern Ireland may have considerations under the Northern Ireland Protocol regarding goods-related VAT obligations.