What is a sole trader?
A sole trader is someone who runs their own business as an individual rather than through a limited company. You don't need to register with Companies House to be a sole trader — you just need to register with HMRC for Self Assessment. Most personal trainers, tradespeople, tutors, dog walkers, cleaners, and freelancers in the UK operate as sole traders.
Do sole traders need to send invoices?
If you provide goods or services to another business, you are legally required to send an invoice if they ask for one. If you're selling to individual consumers, there's no legal requirement — but sending invoices protects you, creates a financial record, and significantly improves your chances of getting paid on time.
What must a sole trader invoice include?
For a non-VAT registered sole trader, a valid UK invoice must include:
- Your name and address
- The date of the invoice
- A unique invoice number
- A description of the goods or services
- The total amount owed
- Payment details
If you are VAT registered, you also need your VAT registration number and the VAT amount shown separately.
Common invoicing mistakes sole traders make
The most common mistakes are sending invoices late, not including a due date, making it difficult to pay, and not following up on unpaid invoices. Each one costs you money.
Sending an invoice late signals that payment isn't urgent. Not including a due date gives clients an excuse to delay. Making payment difficult — providing only an account number with no sort code reference, for example — creates friction. And not following up on late invoices means money that should be in your account simply disappears.
Why most invoicing tools don't work for sole traders
Tools like QuickBooks, FreeAgent, and Xero are built for businesses with accountants, employees, and complex financial reporting needs. For a sole trader sending 10-20 invoices a month, they're expensive, complicated, and largely unused after the first few weeks.
The result is that most sole traders end up doing invoicing badly — too late, too informally, with no follow-up — because the tools available aren't designed for how they actually work.
A better approach: invoicing from WhatsApp
Cleared is built for sole traders who want professional invoices without the admin overhead. You describe the job in a WhatsApp message and a professional PDF invoice goes to your client within seconds. Your bank details are included. If you're on Pro, clients get a card payment button and can pay via Klarna too.
There's nothing to set up beyond a few quick questions. No templates to design, no software to learn, no subscriptions to justify to yourself every month when you open the app and remember you haven't used it.
Keeping track of what you're owed
Cleared keeps a record of every invoice you send. At any point you can ask what's outstanding and see every unpaid invoice. If someone is overdue, a payment reminder goes out from WhatsApp in seconds.
Frequently asked questions
Does a sole trader need to register for VAT?
Only if your taxable turnover exceeds £90,000 in a 12-month period. Below that threshold, VAT registration is optional. If you do register voluntarily, you can reclaim VAT on business expenses but must charge VAT on your sales.
How do I number my invoices as a sole trader?
You can use any numbering system, but it must be sequential and unique. Most sole traders start at INV-001 or 001 and go up from there. Cleared assigns invoice numbers automatically.
Do I need accounting software as a sole trader?
Not necessarily. For simple sole trader businesses, a spreadsheet or a purpose-built tool like Cleared is sufficient to track income and invoices. Full accounting software becomes more useful when you have employees, complex expenses, or a VAT return to file.
What happens if a client doesn't pay my invoice?
Start with a professional payment reminder. If that fails, send a formal letter before action. For debts under £10,000, small claims court is an accessible option and does not require legal representation. Keep copies of all invoices as evidence.
What is Making Tax Digital and does it affect sole traders?
Making Tax Digital (MTD) is a HMRC initiative requiring businesses to keep digital records and submit tax information digitally. It currently applies to VAT-registered businesses and is being extended to income tax for sole traders with turnover above £50,000 from April 2026. Cleared keeps digital records of all your invoices automatically.