Three million people in the UK work as sole traders — freelance designers, consultants, plumbers, online sellers, tutors, gardeners. The tax framework is different from a limited company: you file Self Assessment instead of Corporation Tax, you keep records (not statutory accounts), and VAT registration is voluntary until you cross £90,000 turnover. 4invoices does the invoicing side properly, so your records are ready when 31 January rolls around.
Self Assessment — gathering 12 months of invoices on 30 January
The annual Self Assessment return is due 31 January for the previous tax year (which ended 5 April). 4invoices keeps every invoice digitally with date, amount, customer, VAT status. Year-end export gives you the totals: invoiced revenue, received payments, outstanding amounts, expenses claimed. Hand it to your accountant or feed it directly into HMRC's online filing.
Mileage and expenses — claimable but easy to forget
Sole traders can claim simplified mileage allowance at 45p per mile for the first 10,000 miles, 25p thereafter (HMRC rates 2024). Track journeys in the mobile app — start, end, purpose — and the system computes the claim. Same for use of home as office (the £6/week flat-rate or proportional method) and use of phone, internet, equipment.
Approaching the VAT threshold — should I register voluntarily?
If you're under £90,000 turnover, VAT registration is optional. There are reasons to register voluntarily (reclaiming input VAT on equipment purchases, looking more established to B2B customers) and reasons not to (your B2C customers don't care, and registration adds compliance overhead). 4invoices supports both — non-registered (no VAT lines on invoices) and voluntarily registered (full MTD VAT compliance). Switch when you're ready.
Sole trader specifics — what's actually different
A sole trader isn't a separate legal entity from you — the business is you. That has implications: you report business income on your personal Self Assessment, you pay Income Tax and National Insurance on the profits (Class 2 NI is £3.45/week, Class 4 NI is 6% on profits between £12,570 and £50,270, 2% above), and there's no Corporation Tax (which is a limited company thing). 4invoices structures the invoicing around this — your name is the supplier, your home or work address is the registered address (unless you've registered a separate business name with Companies House), and there's no company number.
Practical day-to-day: you issue invoices, your customers pay you, the money goes into your business bank account (or your personal one if you haven't separated yet — though most accountants advise opening a separate account). The platform tracks your invoiced revenue cumulatively against the £90,000 VAT threshold using a rolling 12-month window, and alerts you at £80,000 and £85,000 so you can plan registration timing.
At year-end, the export gives you the totals you need for Self Assessment: turnover (gross revenue), expenses (categorised per HMRC's business expense rules), simplified mileage if you've used the app, and use-of-home allowance. Your accountant takes it from there, or if you self-file, the HMRC online form has the fields lined up.
Frequently asked
What's the simplest setup for a sole trader?
Open a separate business bank account (any UK bank — Tide and Starling are popular with sole traders for fee-free business accounts). Connect it to 4invoices via Open Banking. Start invoicing customers. The platform handles the record-keeping; you handle the work.
Do I need to register the business name?
Not legally. You can trade under your own name (e.g. 'Sarah Mitchell') without any registration. If you want to trade under a business name (e.g. 'Mitchell Design Studio'), that name needs to appear on your invoices alongside your real name (HMRC requirement). No Companies House registration needed.
Can I move from sole trader to limited company later?
Yes. Many UK businesses incorporate when profits cross around £50,000 to take advantage of the lower Corporation Tax rate vs. higher-rate Income Tax. 4invoices supports both — when you incorporate, you switch your account to limited-company mode, the platform updates the invoice template (company number, registered office, director details), and your invoicing history is preserved.
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