Ask almost any freelancer or contractor why they incorporated, and a version of the same answer comes back: “my accountant said I’d pay less tax.” Sometimes that’s true. Often it isn’t — and the difference between those two outcomes can run to thousands of pounds a year in unnecessary complexity, admin costs, and accountancy fees.

The sole trader tax vs limited company question is one we’re asked constantly at DG Accountancy, and our honest answer is that most online comparisons get it wrong — not because the numbers are inaccurate, but because they compare the two structures in isolation rather than looking at your all-in tax position. If you’re extracting all your profits each year, a limited company is rarely the tax win it appears on paper, particularly at lower income levels.

This post sets out how each structure is taxed, where the comparison genuinely tips in favour of incorporation, and what the 2026 changes mean for both sides of the equation.

As a sole trader, your business profits are your personal income. There is no separate entity — HMRC looks straight through the business to you. You pay Income Tax on profits above your Personal Allowance (£12,570 as of the current tax year) and Class 4 National Insurance Contributions on top of that.

The NIC rates for 2025-26 are 6% on profits between £12,570 and £50,270, and 2% on profits above £50,270. Those rates are lower than they used to be, which matters to the comparison more than many people realise.

You can deduct either the £1,000 trading allowance or your actual business expenses — whichever gives the better result. Beyond that, the sole trader structure is deliberately straightforward: one Self Assessment return per year, no Companies House filings, no payroll to run unless you employ staff, and no requirement to publish your accounts publicly.

That simplicity has real value. It means lower accountancy costs, less admin, and faster decision-making. For someone earlier in their self-employment journey — or running a lifestyle business with steady, moderate income — it is often the right default, not a stepping stone to be upgraded as soon as possible.

A limited company is a separate legal entity. It pays Corporation Tax on its profits — currently 19% on profits under £50,000, rising on a sliding scale to 25% on profits above £250,000. You, as a director, are not the company. You pay yourself separately, typically through a combination of a low salary and dividends.

The classic structure is to pay yourself a salary up to the National Insurance threshold (around £12,570), which is tax-free for both you and the company if you have no other employment income, and then take the remainder as dividends from post-tax profits. Dividends benefit from a £500 annual allowance (reduced from previous years), and the remaining dividend income is taxed at lower rates than employment income.

On paper, this looks compelling. In practice, the saving is smaller than most people expect, for two reasons. First, Corporation Tax is paid before dividends are distributed — so the company has already been taxed on profits before you receive them. Second, from April 2026, basic and higher dividend tax rates have each increased by 2%, which narrows the gap between the two structures further.

The limited company structure does offer a wider range of tax-deductible costs than sole trader trading, and that can be genuinely valuable at higher income levels or in specific industries.

Here is the uncomfortable reality: if you are earning up to around £100,000 in annual profit and drawing all of it out of the company each year, there is no level of income in England where a limited company unambiguously results in a lower overall tax bill compared to operating as a sole trader. The combined burden — Corporation Tax, then Income Tax on dividends — often lands close to or above what a sole trader would pay once you factor in the reduced NIC rates that now apply.

This is not a fringe view. It is a calculation that accountants and tax commentators have been making more loudly in recent years, and the April 2026 dividend rate increase only reinforces the point.

Where the limited company does offer a genuine financial advantage is when you are not drawing all your profits each year. If your business generates more income than you personally need to live on, leaving surplus profits inside the company — where they are only subject to Corporation Tax at 19% rather than your marginal Income Tax rate — creates a real deferral benefit. That retained profit can fund future investment, be drawn in a lower-income year, or form part of an exit strategy.

The calculation also changes significantly if you have a spouse or partner with unused Personal Allowance or basic-rate capacity, or if you are planning to make pension contributions via the company, which are deductible against Corporation Tax.

We would broadly say that a limited company structure starts to make clear financial sense when one or more of the following apply:

• Profits consistently above £50,000 and you do not need to extract all of them each year.
• Pension planning — employer pension contributions made by the company reduce its taxable profits, and can be a highly efficient way to extract value over time.
• Two-director households — splitting income between spouses or civil partners who are both active in the business can make meaningful use of additional Personal Allowances and basic-rate dividend bands.
• Asset protection — limited liability means your personal assets are separate from the company’s obligations. This matters if your business carries meaningful commercial risk.
• Growth and investment — retained profits taxed at 19% inside the company give you more capital to reinvest than you would have after paying Income Tax as a sole trader.

Conversely, if none of those apply — if you are drawing all your income, operating alone, and your profits are comfortably below £50,000 — we would rarely recommend incorporating purely for tax reasons. The admin overhead and accountancy costs can easily outweigh any marginal saving.

Two developments in 2026 are worth factoring into any fresh comparison between the two structures.

Dividend tax rates have increased

From April 2026, basic and higher dividend tax rates each rose by 2%. This directly reduces the net advantage of the salary-plus-dividend strategy that makes limited companies attractive. If your previous calculations assumed the pre-2026 rates, they are now out of date — and the gap between the two structures has narrowed further for typical income levels.

Making Tax Digital for Income Tax is now live for higher earners

From 6 April 2026, sole traders and landlords with qualifying turnover above £50,000 for the 2024-25 tax year are required to use Making Tax Digital for Income Tax. Quarterly digital submissions to HMRC replace the annual Self Assessment for affected businesses. The threshold drops to £30,000 from April 2027, and to £20,000 from April 2028.

This is relevant to the structure comparison because it shifts some of the administrative burden that sole traders previously avoided. Quarterly reporting means you need compatible software and, realistically, an accountant who understands MTD from day one. That narrows — though does not eliminate — the simplicity advantage of remaining a sole trader at higher income levels.

If you are approaching the £50,000 threshold, now is a sensible time to model both structures properly rather than waiting until HMRC forces the decision.