UK VAT Invoice Requirements (2026 Guide)
A legally valid UK VAT invoice has to carry your VAT number, a unique sequential number, the tax point, VAT per rate, and the totals. Here is the full checklist plus a free template.
A VAT invoice is a legal document, and a valid UK one must show a unique sequential invoice number, your business name and address, your VAT registration number, the invoice date and tax point, the customer details, a description of the work, and the net, VAT and gross totals with the VAT rate per line.
Only VAT-registered businesses may charge VAT and issue VAT invoices; if you are under the £90,000 threshold and not registered you send a normal invoice with no VAT line and no VAT number. This guide covers every required field, the three UK VAT rates, simplified invoices, the tax point, the construction reverse charge, and six-year record keeping, all cited to gov.uk.
KaamCam sets your VAT number once and prints it on every sequentially numbered invoice for $12 a month per user, about £9..