Professional Invoice Template
See exactly what a professional invoice should include. Understand the structure, then create your own in MileageCalendar with a live preview and PDF export.
What should a professional invoice include?
A professional invoice is more than just a list of charges. It is a legal document that must include certain information to be valid in the UK — and it is a reflection of your business. A well-structured invoice gets paid faster; a poorly structured one gets questioned, delayed or ignored.
Many sole traders and small businesses are unsure what to include. They forget the invoice number, leave off their address, do not specify payment terms, or do not make it clear how the customer should pay. The result is delayed payment and awkward follow-up conversations.
A good invoice template solves this. It gives you a consistent structure that includes everything required, so you never miss a field and your customers always know what they are paying for and how to pay.
The structure of a professional invoice
A professional invoice should include the following sections: your business name and contact details, the customer name and address, a unique invoice number, the issue date and due date, a clear list of line items with descriptions and quantities, the unit price and amount for each line, the subtotal, any VAT, discounts or adjustments, the total amount due, your payment details (bank account, sort code), and any notes or terms.
MileageCalendar includes a professional invoice template that covers all of these fields. As you fill them in, you see a live preview of the finished document. When you are done, you can download a polished PDF or send it directly to your customer.
You can also add fields that most templates do not support — like business mileage valued at the HMRC rate, or expense lines from your receipt scanning — so the invoice reflects the true cost of the job.
Business details
Your business name, address, phone, email and VAT number if registered.
Customer details
The customer name and billing address, pulled from your customer records.
Invoice number
A unique, sequential invoice number for every invoice — generated automatically.
Dates
Issue date and due date so the customer knows when payment is expected.
Line items
Description, quantity, unit price and amount for each product or service.
VAT and totals
Subtotal, VAT amount and total due, calculated automatically.
Payment details
Bank name, sort code and account number so the customer knows how to pay.
Notes and terms
Payment terms, thank-you note or any additional information.
Try the Invoice Generator
Fill in the fields and see a live preview. Download a professional PDF — no signup required.
| Description | Qty | Rate | Amount |
|---|---|---|---|
| Service or product description | 1 | £100.00 | £100.00 |
Free to start. No credit card required.
How it works
Fill in the template
Use the interactive generator on this page to fill in each field and see a live preview of the finished invoice.
Download the PDF
Download a professional PDF invoice using the template structure — no signup required.
Create a free account
Sign up to save your invoices, reuse customer details and track payments.