A VAT invoice is not simply a normal invoice with “20%” added to the total. It is a tax document and needs to contain information required by the VAT rules. The correct treatment depends on the transaction, your VAT registration and sometimes the value or type of supply.
First check whether VAT should be charged
Do not assume every UK sale uses the standard rate. GOV.UK currently lists a 20% standard rate for most goods and services, alongside reduced and zero rates for certain supplies, while some supplies are exempt or outside the scope. The right rate depends on what you sell and the circumstances.
Information on a VAT invoice
Full VAT invoices generally need the ordinary invoice details plus VAT-specific information such as the supplier's VAT registration number, tax point, net amounts, VAT rate and VAT amount. The exact format requirements are set out by HMRC, so a business issuing VAT invoices should check the current official list rather than relying on an old template.
Full, simplified and modified invoices
HMRC allows different invoice formats in defined circumstances. Simplified VAT invoices can be used for qualifying lower-value supplies, while full invoices are needed in other cases. The threshold and conditions can change, which is why InvoiceLix does not try to decide automatically whether a transaction qualifies.
Common VAT invoice mistakes
- Charging VAT before being entitled to do so.
- Using the wrong VAT rate for the supply.
- Omitting the VAT registration number.
- Showing only a VAT-inclusive total without the required breakdown.
- Using an invoice date where a different tax point needs to be considered.
- Assuming a saved client or item always has the same VAT treatment.
Electronic invoices
HMRC guidance states that electronic invoices must contain the same information as paper invoices. Saving an invoice as PDF is therefore mainly a delivery format decision; it does not reduce the information that needs to be present.