Sole trader or limited company in 2026/27? Tax, admin, liability and MTD compared in plain English by accountants. Includes worked examples at £30k, £60k and £100k profit.
The decision between trading as a sole trader and incorporating a limited company is the most consequential choice many UK business owners make. It changes how you pay tax, how much admin you carry, what filings you owe to HMRC and Companies House, and how exposed your personal assets are to business risk.
For 2026/27 there is a new wrinkle: Making Tax Digital for Income Tax went live on 6 April 2026. Sole traders and landlords above £50,000 of qualifying gross income are now in scope, with thresholds dropping further in 2027 and 2028. Limited companies remain outside MTD ITSA, which has nudged the decision toward incorporation for many people on the cusp.
This guide compares the two structures across tax, admin, liability and growth, with worked examples at £30,000, £60,000 and £100,000 of annual profit using 2026/27 rates. It is written from the perspective of an accountant, not a formation agent, so the bias is toward what is genuinely right for you rather than what generates the highest fees.
Quick answerFor UK 2026/27, sole trader is usually more efficient and far simpler below around £40,000 of profit. The crossover zone sits at £40,000 to £60,000. Above around £60,000 of profit, a limited company typically saves £1,500 to £6,000+ per year in tax through lower Corporation Tax and tax-efficient dividend extraction. Limited company also gives you limited liability, sits outside MTD ITSA, and adds credibility. The trade-off is more admin and around £500 to £2,000 per year of extra accounting cost.
You are the business. There is no legal separation between you and your trading activity. Profits flow directly to you and are taxed as personal income. You file one annual Self Assessment with HMRC (or under MTD ITSA, four quarterly updates plus a Final Declaration if you are above the threshold). You are personally liable for any business debts: creditors can pursue your personal assets if the business cannot pay.
The company is a separate legal entity registered with Companies House. It is owned by shareholders and run by directors (often the same people for small businesses). The company pays Corporation Tax on its profits. You extract money via a combination of salary (taxed via PAYE) and dividends (taxed at lower dividend rates with no National Insurance). The company files annual accounts with Companies House, a CT600 corporation tax return with HMRC, and a confirmation statement. Liability is limited: shareholders are only at risk for the value of their share investment.
This is where the differences are largest and most consequential.
Sole trader profits are taxed as personal income. For 2026/27 the rates are:
| Band | Income (after personal allowance) | Income Tax | Class 4 NI |
|---|---|---|---|
| Personal allowance | £0 to £12,570 | 0% | 0% |
| Basic rate | £12,571 to £50,270 | 20% | 6% |
| Higher rate | £50,271 to £125,140 | 40% | 2% |
| Additional rate | Over £125,140 | 45% | 2% |
Class 2 NI is now charged automatically through Self Assessment for sole traders with profits above the Small Profits Threshold (£6,725). It currently sits at £3.45 per week (so around £179 per year). Most sole traders pay it without thinking about it.
The personal allowance (£12,570 for 2026/27) tapers away above £100,000 of income at £1 of allowance lost for every £2 of income over £100,000. This creates an effective 60% marginal tax rate between £100,000 and £125,140, which is one reason high-earning sole traders often consider incorporation as a way to manage that taper.
A limited company faces Corporation Tax on its profits before any extraction:
| Profit band | Corporation Tax rate |
|---|---|
| £0 to £50,000 (small profits) | 19% |
| £50,001 to £250,000 (marginal relief band) | Effective 26.5% on profits in this band |
| Over £250,000 (main rate) | 25% |
The marginal relief in the £50,000 to £250,000 band sounds complex but in practice means an effective tax rate that smoothly transitions between 19% and 25%. The effective rate on the marginal portion is 26.5%, which catches many directors out (they assume the small-profits rate of 19% applies up to the next bracket).
Once Corporation Tax has been paid, you extract the post-tax profit as a director through some combination of:
Salary: paid via PAYE. Most director-shareholders take a salary up to the Class 1 National Insurance Secondary Threshold (£5,000 for 2026/27) or just below the Lower Earnings Limit to qualify for National Insurance credits without triggering employer NI. A common strategy is to pay a salary of around £12,570 (using your full personal allowance for income tax) but this triggers small amounts of employer NI on the gap between the £5,000 threshold and £12,570.
Dividends: paid from post-tax profit. The first £500 of dividends is tax-free (2026/27 dividend allowance). Beyond that:
| Dividend band | Rate |
|---|---|
| Basic rate | 8.75% |
| Higher rate | 33.75% |
| Additional rate | 39.35% |
Dividends do not attract National Insurance, which is the main source of tax efficiency in the limited company structure.
The cleanest way to see the difference is to run identical pre-tax profit through both structures. The assumptions: single director-shareholder, England (not Scotland), no other personal income, full extraction (no pension or retained profits), £12,570 salary plus rest as dividends in the Ltd case. 2026/27 rates throughout.
As a sole trader
As a limited company
At £30,000 of profit, the limited company is only around £330 per year better off. Once you factor in £500 to £2,000 per year of extra accountancy costs, plus your own time on extra admin, sole trader is the more sensible choice at this level.
As a sole trader
As a limited company
Let me re-state. With £12,570 salary, the dividend basic-rate band is the unused part of basic-rate income tax: £37,700 personal-allowance-to-higher-rate threshold minus the £12,570 already absorbed by salary equals £37,700 - £12,570 = £25,130 of basic-rate room. Then the higher-rate band starts.
Hold on. At £60k the sole trader is actually slightly better by around £1,700 in this scenario. That looks counterintuitive but it reflects the high marginal cost of higher-rate dividends compared with higher-rate income-tax-plus-NI for sole traders. The picture changes dramatically if you retain profit in the company (only extract what you need) or split dividends with a spouse, both of which we ignore here for clarity.
This is the break-even zone. Limited company starts to win when you can either retain profits, use spousal dividends, or contribute heavily to a pension.
As a sole trader
As a limited company (extract all)
Again, at £100k if you extract everything, sole trader looks better by around £5,300. But this is the headline trap. The real win for a limited company comes from controlling extraction.
As a limited company (retain £30k in company, extract £70k pre-CT)
Now the limited company is around £4,750 better off in current-year tax, plus you have a chunky pot of post-tax retained earnings ready to deploy when you choose (future dividends in a lower-income year, pension contributions, business investment). This is the true tax-efficiency play, and it requires the discipline not to extract every penny.
The single most important insight from the worked examples is that the comparison depends almost entirely on how you extract money, not on the headline profit level.
If you genuinely need every penny of profit personally each year and have no spouse or pension to plan with, the tax difference at most realistic profit levels is small and sometimes favours the sole trader. The limited company structure starts to win when you can do at least one of:
If none of those apply, the case for incorporation rests primarily on limited liability, MTD avoidance, and credibility rather than tax efficiency.
This is the most overlooked dimension and the one that should weigh most heavily for businesses operating in higher-risk areas.
You are personally liable for all business debts. If a client successfully sues your business, or a supplier is owed money the business cannot pay, your personal assets are at risk: house, savings, vehicles. Public liability insurance helps but does not eliminate exposure. Sole traders in high-risk fields (anyone giving professional advice, anyone whose work could physically harm a third party, anyone selling on credit) should think very seriously about this.
Shareholders are only at risk for the value of their share investment. If the company is sued or insolvent, your personal assets are protected (with narrow exceptions like personal guarantees on bank loans, or director negligence claims). This protection is the original reason limited companies exist as a structure: they encourage commercial risk-taking by separating business risk from personal ruin.
The practical bar for this protection is real but not absolute. Directors who behave fraudulently, or who continue trading when they know the company is insolvent, can be personally pursued. Personal guarantees on bank facilities convert "limited liability" into personal liability for that specific debt. But for normal honest trading, the protection is substantial.
This is where many people overestimate the limited company's complexity.
So yes, a limited company carries 4 to 6 filing types versus 1 to 5 for a sole trader. But:
What is meaningfully heavier:
This is genuinely new for 2026 and worth weighing.
Sole traders with qualifying gross income (combined self-employment and property, before expenses) over £50,000 in 2024/25 are in MTD ITSA scope from 6 April 2026. From April 2027 the threshold drops to £30,000. From April 2028 it drops to £20,000.
In MTD scope you must:
Limited companies are not in MTD ITSA at all. They report Corporation Tax separately through CT600 returns, with no quarterly digital filing obligation (yet). MTD for Corporation Tax was proposed but has been deferred indefinitely; it will not happen before April 2030 at the earliest.
For sole traders sitting between £30,000 and £60,000 of profit, the MTD obligation is a real reason to consider incorporation. The administrative burden of quarterly MTD reporting (assuming you do not use an accountant who handles it for you) effectively erases the simplicity advantage of being a sole trader. Many people now incorporate not for tax reasons but to step outside the MTD framework.
For full detail on MTD timing and obligations, see our pillar guide: What is Making Tax Digital?.
If you are in this zone and the choice is not obvious, weigh:
If you decide to incorporate, the process takes 3 to 5 working days:
We offer this as a packaged service. See Limited company registration (£199 one-off) for the full set-up.
There is no universal answer to sole trader versus limited company. For most UK businesses with profits below £40,000, sole trader remains the simpler and roughly tax-equivalent choice. From £40,000 to £60,000 the answer depends on extraction strategy and personal circumstances. Above £60,000 with the ability to retain, split or pension-contribute, limited company typically saves £1,500 to £6,000+ per year and adds liability protection on top.
For 2026/27 the MTD obligation tilts the maths further toward incorporation for sole traders in the £30,000 to £60,000 zone who would rather not file quarterly digital updates. That is a new factor and a real one.
If you want personalised modelling on your specific numbers, we offer this as part of our onboarding for both sole trader and limited company clients. The set-up call covers tax projection, extraction strategy and MTD planning for your circumstances.
Get a fixed monthly price in two minutes. No email needed.