What is Sole Trader?

A sole trader (also called a sole proprietor) is the simplest way to run a business in the UK. You are the business — there is no legal separation between you personally and your business activities.

Setting up as a sole trader:

• Register with HMRC for self-assessment (by 5 October after the tax year you started trading)
• You will receive a UTR number
• There is no registration fee and no Companies House filing required
• You can trade under your own name or a business name

Advantages of being a sole trader:

• Simple to set up: Just register with HMRC — no incorporation process
• Easy admin: Simpler accounting and tax filing requirements
• Privacy: Your financial information is not publicly available (unlike limited companies)
• Full control: All business decisions are yours
• Keep all profits: After tax, everything is yours

Disadvantages:

• Unlimited liability: You are personally liable for all business debts — your personal assets (home, savings) are at risk
• Higher tax at higher earnings: All profits are taxed as personal income (up to 45%)
• Perceived as less established: Some clients prefer working with limited companies
• No income splitting: You cannot split profits with a spouse as easily as with a limited company

Most UK freelancers start as sole traders and consider moving to a limited company once their profits consistently exceed £30,000-£40,000 per year, where the tax savings of a limited company structure become meaningful.

As a sole trader, you pay income tax on your profits (after personal allowance) and Class 2 and Class 4 National Insurance contributions through self-assessment.