Sole Trader vs Limited Company Calculator

A sole trader pays Income Tax and National Insurance directly on all business profits. The tax rates are personal rates: 20%/40%/45% IT bands plus Class 2 (£179.40/year) and Class 4 NI (6%/2%). Setup is immediate—register with HMRC and start trading. There is no legal separation between you and the business, meaning personal assets are exposed to business liabilities. Accounting requirements are minimal: simple income/expenses records and an annual Self Assessment return.

A limited company pays Corporation Tax on profits at 19% (profits under £50,000) scaling to 25% (profits over £250,000), with marginal relief between those thresholds. The director/shareholder then extracts profits via a combination of salary and dividends. This two-stage extraction (CT then dividend tax) is often cheaper than sole trader rates at higher profit levels because dividends avoid National Insurance entirely. However, the company must file annual accounts with Companies House, maintain statutory registers, and comply with more complex regulatory obligations.

The crossover point where a limited company becomes more tax-efficient than sole trading typically falls between £30,000 and £45,000 of annual profit, depending on the director's other income and personal circumstances. Below this level, the administrative cost and complexity of a limited company often outweigh the modest tax saving. Above £50,000 profit, the combined CT plus dividend tax route usually saves several thousand pounds per year compared with sole trader IT and NI. Other factors include liability protection, pension contribution options, and the perceived credibility of a limited company structure.