UK VAT Invoice Requirements – Complete Guide for Tradespeople

If you're VAT registered in the UK, you must issue VAT invoices that meet HMRC's strict requirements. Failure to include the correct information can result in your customers being unable to reclaim VAT, disputes with HMRC, and potential penalties. The rules differ depending on whether you issue a full VAT invoice or a simplified one, and Making Tax Digital adds digital record-keeping obligations. This guide covers the VAT registration threshold, mandatory fields, simplified vs full invoice rules, the flat rate scheme, and common mistakes tradespeople make.

VAT Registration Threshold

You must register for VAT if your taxable turnover exceeds £90,000 in any rolling 12-month period. You can also register voluntarily if it benefits your business—for example, to reclaim VAT on purchases. The deregistration threshold is £88,000. Once registered, you must charge VAT on taxable supplies and issue VAT invoices. For non-VAT registered businesses, see self-employed invoice requirements in the UK.

What Must Appear on a VAT Invoice?

Full VAT Invoice

A full VAT invoice is required when the taxable value (excluding VAT) exceeds £250. It must include:

• The words "VAT Invoice" (or "Tax Invoice")
• Your VAT registration number
• Your name, address, and contact details
• Customer name and address
• Unique invoice number
• Date of supply (when goods or services were provided)
• Date of issue (when the invoice was created)
• Description of goods or services
• Quantity and unit price for each item
• Rate of VAT for each item (e.g., 20%, 5%, 0%)
• Total amount excluding VAT
• Total VAT amount shown separately
• Total amount including VAT

VAT invoices must be issued within 30 days of the supply (or of payment, if earlier). You must keep copies for at least 6 years.

Simplified VAT Invoice

For supplies of £250 or less (excluding VAT), you may issue a simplified VAT invoice. This must include:

• The words "VAT Invoice"
• Your VAT number and name/address
• Customer name and address
• Date of supply
• Description of goods or services
• Total amount including VAT
• Rate of VAT (or a statement that the total includes VAT at the applicable rate)

You do not need to show each line item separately on a simplified invoice, but the total VAT must be identifiable.

Flat Rate Scheme

The VAT Flat Rate Scheme lets you pay a fixed percentage of your turnover to HMRC instead of calculating VAT on each sale and purchase. For example, plumbers pay 9.5%, electricians 9.5%, and builders 9.5%. You still charge 20% VAT to customers, but you pay a lower rate to HMRC and cannot reclaim VAT on most purchases. If you use the flat rate scheme, you must still issue full or simplified VAT invoices as above—the scheme only affects how much you pay HMRC, not your invoice format.

Digital Record Keeping – Making Tax Digital

From April 2022, VAT-registered businesses must keep digital records and submit VAT returns via Making Tax Digital (MTD)-compatible software. This means:

• Invoices must be recorded digitally (spreadsheet or software)
• You must use MTD-compatible software to submit returns
• Digital links are required between records—manual transfer of data is not permitted

Paper invoices are still valid for customers, but your own records must be digital. Using an invoice app for tradespeople that supports MTD can simplify compliance.

Common VAT Invoice Mistakes

Missing Date of Supply

Many tradespeople include only the invoice date. HMRC requires both the date of supply (when the work was done) and the date of issue. The date of supply determines which VAT period the sale falls into.

Wrong VAT Rate

Standard rate is 20%, reduced rate 5%, zero rate 0%. Some supplies are exempt (no VAT). Using the wrong rate can mean under or over-charging. For example, certain energy-saving materials for homes qualify for 5% VAT.

Invalid VAT Number

An incorrect or cancelled VAT number invalidates the invoice for your customer's VAT reclaim. Verify your number on the VAT registration checker.

No Unique Invoice Number

Each invoice must have a unique, sequential number. Gaps or duplicates cause problems for audits and customer records. See how to write an invoice as a sole trader for numbering best practices.

Summary

UK VAT invoices must include your VAT number, customer details, date of supply, itemised description, VAT rate, and totals. Use full VAT invoices for supplies over £250 (excluding VAT) and simplified invoices for smaller amounts. The flat rate scheme changes what you pay HMRC but not your invoice format. Making Tax Digital requires digital record-keeping. Avoid common mistakes like omitting the date of supply or using the wrong VAT rate. For more on invoicing basics, see invoice vs quote and self-employed invoice requirements in the UK.