What information does a UK VAT invoice need?

Full VAT invoice requirements: HMRC checklist

HMRC's VAT guidance says a full VAT invoice should include:

• a sequential number that uniquely identifies the invoice
• the time of supply, also known as the tax point
• the date the invoice is issued, where different from the tax point
• the supplier's name, address and VAT registration number
• the customer's name and address
• a description sufficient to identify the goods or services
• for each description, the quantity or extent of services, VAT rate and amount payable excluding VAT
• the total amount payable excluding VAT
• the rate of any cash discount offered
• the total VAT charged, expressed in sterling
• the unit price where applicable

Source: HMRC — Record keeping (VAT Notice 700/21).

VAT number, invoice number and tax point

VAT registration number

Your VAT registration number identifies the VAT-registered supplier. It should be shown clearly with the supplier's name and address.

Sequential invoice number

A VAT invoice needs a sequential identifying number based on one or more series. That is stricter than simply giving the document a descriptive filename or customer reference.

Tax point and invoice date

The tax point records when the supply takes place for VAT purposes. The invoice date records when the document is issued. Where they differ, the invoice should show both rather than treating them as interchangeable.

How should VAT be shown on the invoice?

The invoice needs to make the net amount, VAT rate and VAT amount understandable for the relevant supplies. The total VAT charged must be expressed in sterling, even where other invoice amounts are shown in another currency.

If different line items use different VAT rates, those rates need to remain distinguishable rather than being hidden inside one unexplained total.

For the normal non-VAT invoice checklist, see what a UK invoice should include.

Can you use a simplified VAT invoice?

HMRC says that where the total value of a supply does not exceed £250 including VAT, a simplified VAT invoice may be used in qualifying circumstances. A simplified invoice contains fewer details than a full VAT invoice, but it still needs the supplier's name, address and VAT registration number, the tax point, a description of the supply and VAT-rate information.

For supplies over £250 where a VAT invoice is required, HMRC's full or modified invoice rules apply.

Source: HMRC — VAT invoices detailed rules.

Keep a copy of VAT invoices you issue

VAT invoices form part of your business records. HMRC's guidance says you must keep a copy of every VAT invoice you issue, which is one reason finalised invoices should remain stable historical documents rather than changing when a business profile is edited later.

Know when standard invoicing is not enough

If a transaction uses a special VAT scheme or requires specialist wording, check the relevant HMRC guidance or take professional advice rather than relying on a standard service-business template.

How Klamic handles ordinary VAT invoices

When a business profile is marked as VAT registered, Klamic stores the VAT number, lets invoice lines carry VAT rates, calculates VAT separately and preserves the invoice details when the invoice is finalised.