Sole Trader vs Limited Company Calculator — UK 2026/27

As a general rule of thumb, a limited company structure tends to become more tax efficient than sole trader once annual profits exceed approximately £30,000 to £35,000, assuming you extract all available profits in the same year. Below that level, the administrative costs of running a company — accountancy, Companies House fees, and the time involved — can outweigh the tax savings. However, the crossover point moves depending on your individual circumstances, including whether you have other income sources, whether you claim the Employment Allowance, and how aggressively you plan to retain profits within the company rather than extracting them immediately. Use this calculator to find the specific crossover point for your profit level, then speak to us for a full assessment of your situation.

The most widely used and tax-efficient strategy for a single director is to take a small salary up to the National Insurance Secondary Threshold or the personal allowance level, with the remainder taken as dividends. For 2026/27, many directors pay themselves a salary of £12,570 — the personal allowance — meaning no Income Tax is due on the salary. This salary is above the Lower Earnings Limit, which preserves State Pension entitlement. Company profits remaining after Corporation Tax are then distributed as dividends, which are taxed at 8.75% (basic rate), 33.75% (higher rate), and 39.35% (additional rate) — significantly lower than the equivalent employment income tax rates. In addition, employer pension contributions made directly from the company are a fully deductible expense, reducing the Corporation Tax bill while building long-term wealth outside the company.

Running a limited company comes with more ongoing obligations than being a sole trader, and these have real financial and time costs. You will need to file annual accounts with Companies House, submit a Corporation Tax return (CT600) to HMRC, and file a Confirmation Statement each year confirming your company details are up to date. If you pay yourself a salary, you must run a payroll, submit Real Time Information reports to HMRC, and manage auto-enrolment if you have staff. Your annual accountancy costs will typically be higher than for a sole trader — most small company owners budget between £800 and £2,500 per year for accountancy support, depending on complexity. You also have legal obligations as a company director under the Companies Act 2006. These obligations are entirely manageable with good support but should be factored into your comparison.

The Dividend Allowance is the amount of dividend income you can receive each year before paying any tax on it. For 2026/27, the allowance is £500. This applies to all dividend income regardless of where it comes from — your own limited company, investment portfolios, or other shareholdings. Dividends within the allowance are not taxed, but they do still count towards your total income for the purpose of determining which tax band applies to any dividends above the allowance. It is worth noting that the Dividend Allowance has been reduced significantly in recent years — it was £2,000 as recently as 2022/23 — so the tax efficiency of the dividend strategy has reduced somewhat at lower income levels, though it remains considerably more efficient than equivalent employment income for most director-shareholders.

Yes, incorporating an existing sole trader business is a straightforward process, though there are several important steps to manage correctly. You will need to register a limited company at Companies House — this can be done online in a matter of hours for a standard company. You will need to open a separate business bank account in the company's name, transfer any business assets into the company, notify HMRC of the change in structure, and inform clients, suppliers, and insurers. If your business has goodwill — an established client base, reputation, or intellectual property — you may also wish to consider how this asset is treated on incorporation, as there can be tax implications. For most freelancers and tradespeople with straightforward businesses, incorporation is simple. For businesses with employees, premises leases, or significant assets, a more structured approach is advisable.