Invoicing · Updated 2026-10-06

UK VAT Invoices: Requirements, Rates & What to Include (2026)

If your business is VAT-registered in the UK, your invoices aren't just bills — they're legal tax documents. HMRC sets precise rules for what a VAT invoice must contain, when you must issue one, and which type to use. Get it wrong and your customer can't reclaim the VAT, and you could face penalties. This guide covers the rules in plain English, based on HMRC's published requirements.

Do you need to issue VAT invoices?

Only VAT-registered businesses charge VAT and issue VAT invoices. You must register for VAT if your taxable turnover exceeds the VAT threshold (£90,000 in the 12 months to the end of the 2026/27 tax year — check GOV.UK for the current figure, as it changes). You can also register voluntarily below the threshold, which is common for B2B freelancers whose clients can reclaim the VAT.

If you're not VAT-registered, you must not charge VAT and must not show VAT on your invoices. Your invoices follow the standard UK invoice requirements instead.

UK VAT rates

There are three VAT rates in the UK:

• Standard rate — 20%. Applies to most goods and services.
• Reduced rate — 5%. Applies to specific items such as domestic fuel and power, and certain energy-saving installations.
• Zero rate — 0%. Applies to items like most food, children's clothes, and books. Zero-rated is not the same as exempt — with zero-rated sales you can still reclaim VAT on your costs.

Some supplies are exempt from VAT (insurance, finance, some health and education services). Exempt supplies are different again: you can't reclaim VAT on related costs. If you make a mix of taxable and exempt supplies, the invoicing gets complicated — talk to your accountant.

What must a full VAT invoice include?

A full VAT invoice is the standard type, used for most transactions between VAT-registered businesses. According to HMRC's requirements (set out in the VAT Regulations 1995 and detailed in HMRC's internal VAT manual), it must show:

1. A unique sequential invoice number
2. The date of issue
3. The time of supply (tax point) — when the goods or services were supplied, if different from the issue date
4. Your business name, address, and VAT registration number
5. The customer's name and address
6. A description of the goods or services, sufficient to identify them
7. The quantity of goods or extent of services for each item
8. The VAT rate applied and the amount payable excluding VAT for each item
9. Any cash discount terms offered
10. The unit price excluding VAT
11. The total amount of VAT payable, expressed in sterling (even if you invoice in another currency, the VAT total must be shown in GBP)
12. The gross total payable

That's a long list, which is exactly why using a proper template or tool matters — missing fields are one of the most common compliance failures for small businesses.

Simplified VAT invoices: the £250 rule

For retail supplies under £250 including VAT, you can issue a simplified VAT invoice with fewer details. A simplified invoice needs:

• Your business name, address, and VAT registration number
• A unique invoice number
• The date and time of supply
• A description of the goods or services
• The VAT rate applied
• The total including VAT

You don't need the customer's details, the net amounts, or the item-by-item VAT breakdown. This is designed for shops and till receipts, not B2B freelancing — if your client is a VAT-registered business that needs to reclaim VAT, give them a full invoice regardless of the amount.

For retail supplies over £250, a modified VAT invoice is used — essentially a full invoice plus the VAT-inclusive total. In practice, just issue a full VAT invoice whenever there's any doubt; it always satisfies the requirement.

When must you issue a VAT invoice?

VAT invoices must generally be issued within 30 days of the date of supply, or within 30 days of receiving payment if you're paid in advance. Don't sit on them — late invoicing can push a transaction into the wrong VAT return period and cause reporting headaches.

You must issue a VAT invoice to any VAT-registered customer on request, and as a matter of routine for B2B supplies. For supplies to non-VAT-registered customers (consumers), you're not obliged to issue a VAT invoice unless they ask for one — but your standard invoice should still be clear and professional.

Showing VAT correctly: worked example

Say you're a VAT-registered designer invoicing a client £2,000 for a website:

• Design services: £2,000.00 (net)
• VAT at 20%: £400.00
• Total due: £2,400.00

On the invoice, the £2,000 net, the 20% rate, and the £400 VAT must each appear as separate figures, with the VAT total in sterling. What you must not do is show a single £2,400 line with no VAT breakdown — your client can't reclaim VAT from that, and HMRC won't accept it as a valid VAT invoice.

Common VAT invoicing mistakes

Charging VAT when you're not registered. This is serious — HMRC treats it as an offence. If you're below the threshold and haven't registered voluntarily, your invoices must show no VAT at all.

Forgetting the VAT number. Your VAT registration number must appear on every VAT invoice. Without it, the document isn't a valid VAT invoice and your customer's reclaim can be rejected.

Wrong tax point. The time of supply determines which VAT return the sale belongs to. If you invoice in April for work completed in March, get the supply date right — it affects both your return and your customer's.

Invoicing in foreign currency without a sterling VAT total. You can invoice in euros or dollars, but the VAT amount must be converted and shown in GBP. Use HMRC's published exchange rates or a consistent market rate.

Keeping poor records. You must keep VAT records for at least 6 years. Digital copies are fine. Losing your invoice trail is one of the fastest routes to a painful HMRC enquiry.

VAT invoices and Making Tax Digital

If you're VAT-registered, you're almost certainly in scope for Making Tax Digital (MTD) for VAT, which requires digital record-keeping and VAT returns submitted through compatible software. Your invoicing tool should fit into that workflow — our free invoice generator produces the document, and your MTD-compatible software handles the records and returns. The two jobs are separate but connected.

The bottom line

UK VAT invoices follow precise HMRC rules: full invoices for B2B with every required field, simplified invoices only for sub-£250 retail, issued within 30 days, VAT totals in sterling. The rules look daunting written out, but in practice they reduce to one habit: use a proper VAT invoice template every time, and never charge VAT unless you're registered. Our free invoice generator includes VAT fields, multi-currency support, and professional templates — no signup, no watermark.

This guide is general information based on HMRC's published requirements, not professional tax advice. VAT rules change; confirm current requirements on GOV.UK or with your accountant.