UK VAT Invoices Explained: Requirements & Examples

General guidance, not tax advice. This article reflects HMRC rules as we understand them in 2026; VAT rates and requirements change. Confirm the current details on GOV.UK or with an accountant before relying on it for your business.

A VAT invoice does two jobs at once: it requests payment like any invoice, and it documents the VAT charged on the transaction so the buyer can reclaim it as input tax. Get the format wrong and your customer's VAT reclaim gets blocked — which tends to generate phone calls.

Do You Need to Be VAT-Registered?

You must register for VAT when your taxable turnover exceeds £90,000 in any rolling 12-month period. This threshold was raised from £85,000 in April 2024.

Voluntary registration below the threshold is also an option. It tends to make sense when you sell primarily to other VAT-registered businesses (they can reclaim the VAT you charge, so it doesn't effectively raise your price for them) and you have meaningful VAT on your own purchases to reclaim. It makes less sense if most of your clients are consumers, since adding 20% either makes you pricier or eats your margin. It also adds admin: quarterly returns, digital records, and filing deadlines.

Once registered, your obligations include charging VAT on all taxable sales, issuing proper VAT invoices, filing quarterly VAT returns via MTD-compatible software, and keeping VAT records for at least 6 years.

HMRC generally requires VAT-registered businesses to issue VAT invoices to taxable customers within 30 days of the tax point. The invoice is what allows the buyer to reclaim the VAT on their own return. Without it, they're stuck paying the tax with no credit.

What Must Appear on a Full VAT Invoice

HMRC specifies exactly what a full VAT invoice must contain. Missing any of these can invalidate the invoice for input tax purposes:

• A sequential number from one or more series that uniquely identifies the invoice — keep an audit trail for any voided or cancelled numbers.
• Your business name, address, and VAT number (format: GB followed by 9 or 12 digits).
• The invoice date.
• The tax point (date of supply) — when the goods were delivered or the service performed. This can differ from the invoice date.
• Customer name and address.
• Description of goods or services supplied.
• Quantity of each item.
• Unit price excluding VAT.
• VAT rate for each item (20%, 5%, or 0%).
• Total excluding VAT.
• Total VAT charged.
• Total including VAT.
• Any discount rate applied.

The sample invoice below shows a properly formatted UK VAT invoice with all required fields.

Our UK freelance template and UK consulting template have these fields pre-configured.

Simplified VAT Invoices (Under £250)

For transactions under £250 including VAT, you can issue a simplified invoice. This is what most retail businesses use — the till receipt at a restaurant or shop is typically a simplified VAT invoice.

A simplified invoice needs: your name, address, and VAT number; the date of supply; a description of the goods or services; the total including VAT; and the VAT rate charged. You don't need the customer's details, the net amount, or a separate VAT calculation.

Simplified invoices are not valid for reverse charge transactions.

UK VAT Rates at a Glance

The distinction between zero-rated and exempt matters for your VAT return. Zero-rated supplies are technically taxable (at 0%), so you can still reclaim input VAT on associated costs. Exempt supplies carry no VAT, and you generally cannot reclaim input VAT on costs related to them. "Outside the scope" of VAT is a separate category again, covering certain cross-border or non-business supplies.

If you supply items at multiple VAT rates on the same invoice, show the subtotal and VAT for each rate separately. Most accounting software handles this automatically.

What Triggers HMRC Questions

VAT inspections tend to flag the same issues repeatedly. Missing VAT number — without it, your customer cannot reclaim input tax, and it's the single most common error. Wrong VAT rate, particularly charging 20% on a zero-rated or reduced-rate item. Incorrect tax point: using the invoice date when goods were actually delivered on a different date. Gaps in invoice numbering, which suggest missing invoices and prompt further scrutiny. Missing the net/VAT/gross breakdown, since all three must appear separately on a full VAT invoice. And rounding errors, which are small per invoice but cumulative across a year of returns.

Use a template with built-in VAT calculations to eliminate most of these. Our invoice generator handles VAT arithmetic automatically.

Making Tax Digital and Record-Keeping

Most VAT-registered businesses must keep some VAT records digitally and file through MTD-compatible software, unless exempt from Making Tax Digital for VAT.

You must retain all VAT records for at least 6 years. This includes every VAT invoice you issue and receive, credit notes, debit notes, records of goods and services bought and sold, and your VAT account summary.

Practically, this means using accounting software (Xero, QuickBooks, FreeAgent) or at minimum well-organised digital files that your accountant can access. Paper shoeboxes won't satisfy HMRC.

Credit Notes: Correcting VAT Invoice Errors

If you issue an incorrect VAT invoice, don't edit the original. Issue a credit note that references the original invoice number, then issue a corrected replacement invoice with a new number. HMRC requires a clear audit trail showing the correction.

A credit note must contain: the words "credit note," your name and VAT number, the customer's name, the date, a reference to the original invoice, the reason for the credit, and the VAT adjustment.

Frequently asked questions

What is the UK VAT registration threshold in 2026?

£90,000 in taxable turnover over any rolling 12-month period (raised from £85,000 in April 2024). You can register voluntarily below this threshold.

Can a non-VAT-registered business issue a VAT invoice?

No. Only VAT-registered businesses can issue VAT invoices. If you're not registered, you must not charge or display VAT. A note such as "Not VAT registered" on your invoices avoids confusion.

Do I need a VAT invoice for every sale?

Not always. You must still charge VAT on every taxable supply, but a full VAT invoice is mainly required for VAT-registered customers so they can reclaim the input tax. For non-registered customers a simplified invoice or receipt is often enough, though issuing a proper VAT invoice never hurts.

How long must I keep VAT records?

At least 6 years. HMRC can inspect records going back this far during a VAT audit.

What if I issue an incorrect VAT invoice?

Issue a credit note referencing the original, then issue a corrected invoice with a new number. Never edit the original — HMRC requires a clear audit trail.