Where a VAT registered person makes supplies of goods or services to another VAT registered person, subject to the standard or reduced rate, they must issue a full VAT invoice as this is the customer evidence to validate input tax claims.
Having said that, it is now possible for input tax claims to be allowed without documentary evidence, providing sufficient evidence of entitlement can be given to HMRC. Such claims are at HMRC's discretion. There is no need to give a VAT invoice to a non-registered person unless he asks for one.
Full VAT invoices must show:
an identifying number;
name, address and VAT registration number of the supplier;
name and address of the customer;
date of issue and tax point;
the unit price, and a description of the goods or services supplied.
For each description, the invoice must show the quantity of goods or extent of services; the charge made excluding VAT; the rate of VAT; any discount offered and, of course, the total VAT charged (shown in Sterling).
Zero-rated or exempt supplies must be shown separately or on a separate invoice.
'Less detailed' and 'modified' VAT invoices
Apart from full VAT invoices, there are also 'less detailed' and 'modified' VAT invoices, which are only applicable to retail sales.
Less detailed invoices can be issued for VAT-inclusive supplies of £250 or less and need only show: name, address and VAT registration number of the supplier; the date and tax point; a description of the goods or services, and the VAT-inclusive total for each rate of VAT involved.
The VAT amount is then calculated by applying the VAT fraction (1/6 when the standard rate is 20%).
Note that exempt supplies cannot be shown on a less detailed VAT invoice.
The supplier can adapt credit card vouchers to constitute less detailed invoices by adding his registration number, a description of the goods or services, and the appropriate VAT rate, but if he gives a receipt as well, only one of them can be the VAT invoice.
Modified VAT invoices can be issued by retailers with the customer's agreement and even for sales over £250. They should show the VAT-inclusive value of each positive rated supply, then at the bottom: the total VAT-inclusive value of the positive rated supplies; the VAT due on them in Sterling; the VAT-exclusive value of the supplies, and the value of any zero-rated or exempt supplies.
If in any doubt, full VAT invoices should be issued.