What a Sole Trader Invoice Needs to Contain
As a UK sole trader, your invoice is both a request for payment and a business record. HMRC requires that it contains enough information to identify the supply and the parties involved. Here is exactly what to include.
Sole Trader Invoice: Required Fields
Your Details:
- Your full name (or trading name, but your real name must be identifiable)
- Your business address
- Your email or phone number (not required, but professional and practical)
Invoice Reference:
- The word "Invoice" at the top
- A unique invoice number (e.g., INV-0001)
- Invoice date
Client Details:
- Client name or company name
- Client address
What Was Provided:
- Clear description of the work done or goods supplied
- Date(s) of work (useful for disputes)
Financial Details:
- Amount for each item or service
- Total amount due
- Payment due date or terms (e.g., "Due within 30 days")
- Your bank account details (account name, sort code, account number)
Sole Trader Invoice Template: Example
INVOICE
From: Alex Johnson Electrical 22 Station Road, Birmingham, B1 1AA Tel: 07700 900123 Email: alex@ajelectrical.co.uk
Invoice Number: INV-0023 Invoice Date: 2 June 2026 Payment Due: 2 July 2026
To: Oakfield Property Management 100 High Street, Birmingham, B2 2BB
| Description | Amount |
|---|---|
| Electrical installation — 3 x office units, 45 Brook Street | £1,800.00 |
| Total Due | £1,800.00 |
Payment: Bank transfer to Alex Johnson, Sort code: 20-00-00, Account: 12345678
Overdue payments may attract interest under the Late Payment of Commercial Debts Act 1998.
Adding VAT to a Sole Trader Invoice
If you are VAT registered, you must add additional fields:
- Your VAT registration number (format: GB 123456789)
- The net amount (before VAT)
- The VAT rate applied (e.g., 20%)
- The VAT amount
- The gross total (net + VAT)
Your VAT registration number must appear on every VAT invoice. Without it, your client cannot reclaim the VAT.
CIS Sole Trader Invoice
If you work in construction as a CIS subcontractor, add:
- Your UTR (Unique Taxpayer Reference) — 10 digits
- Labour and materials as separate line items
- CIS deduction rate (0%, 20%, or 30%)
- CIS deduction amount (rate × labour only)
- Net payable (total − CIS deduction)
Invoice Numbering Best Practices
Sequential numbering is a legal and practical requirement. Use a simple system:
- INV-0001, INV-0002 — simple sequential
- 2026-001, 2026-002 — year-based (restarts each year)
- AJ-001, AJ-002 — initials prefix (useful if you have multiple businesses)
Never reuse numbers. If you cancel an invoice, keep it in your records as cancelled and move to the next number.
Setting Payment Terms That Get You Paid Faster
Standard payment terms in the UK are 30 days, but you can set shorter terms:
- 7 days — for small jobs or clients with a history of late payment
- 14 days — a good default for most work
- 30 days — standard for larger, established clients
For new clients or large jobs, consider requiring a deposit before starting. 30–50% upfront eliminates the risk of non-payment for materials and ensures client commitment.
How to Send Your Invoice
Email with PDF attachment is the standard method for most sole traders. Include the invoice number and amount in the subject line: "Invoice INV-0023 — £1,800 — Alex Johnson Electrical."
Payment links dramatically speed up payment. When clients can click a link and pay by card or Apple Pay, average payment times drop significantly. Services like Stripe make this straightforward.
Do I Need Accounting Software?
For very low volume (under 10 invoices per year), a Word or Excel template may be sufficient. For anything more, dedicated invoicing software saves time, reduces mistakes, and keeps your records organised for tax.
Key benefits of dedicated software:
- Invoice numbers assigned automatically
- Reminders sent when invoices are overdue
- Records stored digitally for 6 years (HMRC requirement)
- CIS and VAT handled without manual calculation
FlashBill: Free Sole Trader Invoicing
FlashBill lets you create a professional sole trader invoice in under 2 minutes. Accept payment online, send automated reminders, and keep your records organised. Free for up to 5 invoices per month with no credit card required.