# Do I need to include my VAT number on every invoice?
Yes, if you are VAT-registered, you must include your VAT registration number on all VAT invoices. This is a legal requirement under HMRC regulations. The VAT number must be in the correct GB format (e.g., GB123456789) and displayed prominently on the invoice.
## Related Topics
- UK VAT number
- VAT invoice UK
- HMRC VAT requirements
- VAT registration number