Sole Trader vs Limited Company: Which Is Better in 2026?

It's the first real decision every new business owner in the UK faces: work as a sole trader, or open a limited company? There is no universal answer — but there is a clear way to think about it. Here is the honest comparison, with 2026 numbers.

Sole trader: the simple start

As a sole trader you and the business are legally the same person. You register for Self Assessment with HMRC (the CWF1 route) by 5 October after the tax year you started, file one return a year, and keep the profits after tax.

• Income Tax on profits: 20% basic, 40% higher, 45% additional rate.
• Class 4 National Insurance: 6% on profits between £12,570 and £50,270, then 2%.
• The first £1,000 of casual trading income is covered by the trading allowance — below that you may not need to register at all.
• From April 2026, sole traders with qualifying income over £50,000 fall under Making Tax Digital: digital records and quarterly updates to HMRC instead of one annual return. The threshold drops to £30,000 in 2027 and £20,000 in 2028.

Limited company: the structure that scales

A limited company is a separate legal person. It pays Corporation Tax on its profits — 19% up to £50,000, 25% from £250,000, with marginal relief in between — and you take money out as salary, dividends, or employer pension contributions.

• Limited liability: if the business fails, your personal assets are generally protected.
• Tax planning room: the salary-plus-dividends mix, income splitting with a shareholding spouse, and pension contributions can meaningfully cut the total tax bill.
• Credibility: some corporate clients and lenders simply prefer dealing with a company.
• The cost: more admin — annual accounts, a confirmation statement, a CT600, and your details on the public register.

The crossover point

As a rule of thumb, below roughly £30,000 of annual profit the simplicity of being a sole trader usually wins — the tax saving from a company is small and the extra admin isn't worth it. Somewhere between £30,000 and £50,000 the company starts to pay for itself, and above £50,000 the tax advantage of the corporate structure is usually clear. But the crossover moves with your circumstances: other income, whether your spouse can hold shares, how much you need to draw out versus reinvest, and mortgage plans all shift the answer.

Five questions that decide it in practice

• How much profit will you realistically make this year and next?
• Do you need every pound personally, or can profits stay in the business?
• Does your work carry risk you'd want a liability shield against?
• Will your clients care whether they contract with a company?
• Are you ready for quarterly MTD reporting either way once your income passes the threshold?

You can change your mind

Starting as a sole trader and incorporating later is a well-trodden path — and usually painless with the right timing. Going the other way (closing a company back to self-employment) is harder. If in doubt, start simple; if the numbers say company, we'll tell you.

Written by Iurie Bivol — entrepreneur and accountant, 15 years in the UK.