Sole Trader Invoice: What to Include in the UK

A UK sole trader invoice should identify you and your customer, carry a unique invoice number, describe what you supplied, show the relevant dates and amounts, and explain how and when the customer should pay.

The difficult part of a first invoice is rarely the PDF. It is deciding which name to use, how much detail to put in each line and whether a date or payment instruction has been missed. A clear form turns that uncertainty into a short sequence of checks.

This guide is primarily for sole traders who are not VAT registered. VAT registration, cross-border work, construction schemes and unusual supplies can change the required information and format, so use current HMRC guidance or professional advice for those cases.

How to create a UK sole trader invoice

Collect the customer’s legal details and your agreed scope before opening the form. You can then finish the invoice in one pass instead of guessing halfway through.

1. 1

   Identify both parties

   Enter your own name, any trading name and an address, then add the customer’s name and address. Use the party that actually placed the order.

2. 2

   Describe and price the work

   Add a unique invoice number, issue and supply dates, then itemise services or goods with quantities, unit prices and VAT information where applicable.

3. 3

   Set payment terms and review

   Choose the due date and payment method, add the bank details the customer needs, and check the complete PDF before sending it.

A practical invoice checklist

GOV.UK lists the core information an invoice must contain, including a unique identification number, supplier and customer details, a description, supply and invoice dates, amounts and the total. A sole trader using a business name must also show their own name and an address where legal documents can be delivered.

In practice, clarity matters as well as presence. Put the invoice number near the heading, keep addresses in separate supplier and customer blocks, and write line items that can be matched to the quote or timesheet. State whether the price shown is net or gross when VAT applies.

• A unique invoice identification number.
• Your name, trading name where used, and contact address.
• The customer’s name and address.
• A clear description, dates, amounts and total due.
• VAT number and VAT breakdown only where applicable.

Payment terms that answer the customer’s questions

“Payment due in 14 days” is less useful if the issue date is hard to find. Show an actual due date alongside your issue date. For bank transfer, include the correct account details; if the customer requires a payment or purchase-order reference, add it explicitly to a note. For another method, select Other and enter its name in the custom payment field.

Simple Invoicing can generate and store the invoice, but it does not take the payment or inspect your bank account. Once you have checked receipt separately, you can mark the invoice as paid in your invoice list.

VAT and unusual work need separate checks

Do not add a VAT number or VAT amount simply because an online sample has one. VAT invoices have additional requirements, and the correct treatment depends on registration and the supply. International customers, reverse charge arrangements and sector-specific schemes can require different wording or records.

The app creates a general PDF invoice; it does not register you for tax, file returns or decide the legal treatment of a transaction. HMRC plans mandatory e-invoicing for all VAT invoices from April 2029, and this product does not currently create structured e-invoices.

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