The UK VAT Invoice: What HMRC Expects to See

UK VAT invoices look simple until a customer's accounts team rejects one because a field is missing. The rules aren't secret — HMRC publishes exactly what a VAT invoice must contain — but they're easy to miss when you're just trying to get paid. This is a plain-English walkthrough. It's general information, not tax advice: rates and thresholds change, so HMRC's own guidance is the final word and your accountant is the second opinion.

When you need to issue one

If you're VAT-registered and selling to another VAT-registered business, a full VAT invoice is expected. Sales to consumers usually need less paperwork (a simplified receipt does), and very small sales can skip the detail entirely. Below the registration threshold you won't normally charge VAT at all — the point of a VAT invoice only appears once you're registered.

The fields that make it a "VAT invoice"

• Your VAT registration number — the "GB" number HMRC issued you. No VAT number, no VAT invoice.
• An identifying number — a unique, sequential invoice number. Gaps are fine; duplicates are not.
• Issue date — when the invoice is created (for continuous supplies this can matter for which VAT period it falls in).
• Your name and address, and the customer's name and address — both sides need to be identifiable.
• A description of the goods or services — enough that the supply is clear, with quantity where relevant.
• The VAT rate applied — and the amount of VAT, either shown separately per rate or clearly itemised.
• The total excluding VAT, the VAT amount, and the total including VAT — in pounds sterling unless you've agreed otherwise in writing.

The 20% standard rate is the one most UK businesses use, with 5% (reduced) and 0% (zero-rated) for specific goods. If you're not sure which rate your supply falls under, that's a question for HMRC's guidance or your accountant — charging the wrong rate means correcting a later return.

Reverse charge: when the customer accounts for the VAT

For certain B2B supplies — construction services between VAT-registered businesses being the classic case — the customer accounts for the VAT instead of you. Your invoice then says something like "reverse charge: customer to account for VAT" and shows no VAT to pay. Don't apply this casually: it only works for specified supplies and specified parties, so check before you use it.

How to create yours with SleekKitBox

1. Open the UK VAT Invoice template.
2. Enter your business and VAT number, the client, and your line items.
3. Set the VAT rate (20 for standard) — the form adds the tax to your totals.
4. Download the PDF. Emailing it? Password-protecting the PDF keeps the document safe in transit without extra effort.

One habit worth stealing from accountants: check the VAT number on every outgoing invoice before you send. HMRC has a free online VAT number checker — two seconds that saves a rejected-invoice email later.

Frequently asked questions

Can I send a VAT invoice for a sale to a consumer? Yes, but you usually don't need a full VAT invoice — a simpler receipt satisfies the rules for most consumer sales.

Do I show VAT separately or included? Either is fine as long as the amounts are clear; most business customers prefer VAT shown separately so they can reclaim it.

What if I'm not VAT-registered? Then don't charge VAT and don't call the document a VAT invoice — a normal invoice with your details is what you need.

Where do I check current rules? HMRC's "VAT invoices" guidance is the authority; your accountant handles anything unusual.

👉 Create yours: free UK VAT Invoice template →