What Must a UK Invoice Include?

Required Fields for a UK Invoice

Whether you're a sole trader or a limited company, every UK invoice should include the following fields. Missing any of these could delay payment or cause issues with HMRC.

1. Your business name and address — or your trading name if different
2. Client's name and address — the person or business being invoiced
3. Unique invoice number — a sequential number that identifies the invoice
4. Invoice date — when the invoice was issued
5. Description of goods or services — clear enough for the client to understand what they're paying for
6. Amount due — the total amount to be paid
7. Payment terms — when payment is due and accepted payment methods

Additional Fields for VAT Invoices

If you're VAT-registered, your invoices must also include several extra fields on top of the standard requirements listed above.

• Your VAT registration number
• The VAT rate applied to each item
• The net amount (before VAT)
• The VAT amount
• The gross amount (including VAT)

Common Mistakes to Avoid

Even experienced business owners sometimes get invoices wrong. Here are the most frequent errors to watch out for.

• Missing invoice numbers — every invoice must have a unique number
• Incorrect VAT rates — check whether your goods or services qualify for the reduced or zero rate
• No payment details — include your sort code and account number so clients know where to pay
• Vague descriptions — "Services rendered" is not specific enough; describe what you actually did

Simplified VAT Invoices

If the total amount including VAT is under £250, you can issue a simplified VAT invoice. This is a shorter version that only needs to include:

• Your name and address
• Your VAT number
• The date
• A description of the goods or services
• The total amount including VAT
• The VAT rate

This is common for retail transactions and small purchases.