Whether to stay self-employed or incorporate is one of the most significant financial decisions a growing sole trader faces. Tax is part of the answer. Admin burden, extraction strategy, retained profit, commercial credibility and long-term plans are the rest. This page gives a detailed sole trader vs limited company comparison for 2026/27, with worked examples and a break-even analysis.
Written by James Whitfield · Updated August 2026 · Checked against 2026/27 HMRC rates · Editorial standards · Methodology
Sole traders are taxed on every pound of profit in the year it is earned; a company lets you retain post-tax profit and choose when to draw it. That flexibility, not a bigger headline take-home, is the real reason to incorporate.
On £50,000 fully extracted the sole trader keeps £40,268 against the company's £38,862. Incorporation wins as profit rises, when you leave money in the company, or when dividends can be split with a spouse.
Take the same £50,000 profit through both structures, extracting everything. The sole trader pays income tax plus Class 4 NI; the company director pays corporation tax then dividend tax on a £12,570-salary split.
| Sole trader - income tax + Class 4 NI£7,486 income tax + £2,246 Class 4 at 6% | -£9,732 |
| Sole trader take-home | £40,268 |
| Limited company - corporation tax + dividend tax£6,896 corporation tax + £1,136 employer NI + £3,107 dividend tax | -£11,138 |
| Limited company take-home (full extraction) | £38,862 |
| Difference at £50k (full extraction) | Sole trader +£1,406 |
This surprises people: at £50,000, extracting every penny, the sole trader is actually a touch ahead. The limited company's edge is not the headline full-extraction take-home at this level - it is what you can do that a sole trader cannot. Retained profit sits in the company taxed only at 19% until you choose to draw it, so you can leave money in for a lower-income year, split dividends with a shareholding spouse, or fund a pension from pre-tax profit. The company pulls clearly ahead once profits are higher or you do not need to extract everything.
As a sole trader, income tax and Class 4 NI are calculated directly on your taxable profit. There is no legal separation between you and the business. The profit is yours and your personal tax follows from it.
As a limited company director, the company pays corporation tax on its profits: 19% on profits up to £50,000, 25% above £250,000, with marginal relief in between for 2026/27. You then extract income as a combination of director salary and dividends. Salary is subject to income tax, employee NI and employer NI. Dividends are taxed at lower rates (10.75% basic, 35.75% higher, 39.35% additional) and carry no NI, but they can only come from post-corporation-tax profit.
The headline advantage of a limited company is that dividend tax rates are lower than income tax rates at equivalent income levels, and NI does not apply to dividends. But employer NI on the salary, corporation tax on profits and the extra filing and accountancy obligations all reduce the theoretical saving.
NI is where the structural difference is most visible. A sole trader pays Class 4 NI at 6% on profits between £12,570 and £50,270, and 2% above. At £60,000 profit, Class 4 NI is about £2,457. Class 2 NI is no longer payable for 2026/27 — it was effectively abolished from April 2024.
A limited company director taking £12,570 salary pays zero employee NI on that salary, because the 8% rate only starts above £12,570. Taking salary at or below £5,000 avoids employer NI entirely and still incurs no employee NI.
The company pays employer NI at 15% on salary above £5,000 (the secondary threshold for 2026/27). On a £12,570 salary that is approximately £1,139. Dividends attract no NI at all. For a director extracting £60,000 as £12,570 salary plus £47,430 dividends, total NI is £1,139 (employer NI only), versus approximately £3,457 Class 4 NI for a sole trader at the same profit level.
The limited company structure typically becomes more tax-efficient than sole trader at around £35,000–£40,000 in profit, once you account for the extra accountancy cost. Below that level the tax saving is usually smaller than the additional admin cost (typically £1,000–£2,000 more per year).
At £35,000 profit: sole trader pays approximately £4,866 income tax plus £2,037 Class 4 NI, total approximately £6,903. A limited company at the same profit, with £12,570 salary and £18,430 dividends, pays approximately £3,994 corporation tax, £1,139 employer NI and £1,979 dividend tax, total approximately £7,112. The sole trader is slightly ahead on tax alone, but the gap is small.
By £50,000 profit the limited company starts to pull ahead, and the gap widens meaningfully above £60,000. At those levels the annual tax saving starts to exceed the extra accountancy cost of £1,200–£2,000, making incorporation financially worthwhile. Above £80,000 the advantage is clear even after all additional costs.
Sole trader at £60,000 profit (England, 2026/27): income tax is £11,432 — 20% on the £37,700 basic-rate band plus 40% on the £9,730 above it. Class 4 NI: 6% × (£50,270 − £12,570) = £2,262, plus 2% × (£60,000 − £50,270) = £195, so about £2,457. Total tax: about £13,889. Take-home: about £46,111.
Limited company at £60,000 profit: director takes £12,570 salary. Employer NI: £1,139. Taxable profit: £60,000 − £12,570 − £1,139 = £46,291. Corporation tax at 19%: approximately £8,795. Post-tax profit for dividends: approximately £37,496. Director takes all as dividends. Dividend tax: £500 allowance, then £37,000 at 10.75% = £3,978. Total tax: approximately £13,912. Personal take-home: approximately £46,088.
The difference at £60,000 is tiny: approximately £98 per year in the sole trader's favour, before extra accountancy costs. The limited company's real advantage at this level is flexibility. If you do not need to extract all profit immediately, the retained £37,496 (after corporation tax) stays in the company and can be extracted in a future year at a lower rate.
Sole trader at £100,000 profit (England, 2026/27): income tax is about £27,432 (20% on £37,700, 40% on £49,730). Class 4 NI: 6% × £37,700 = £2,262, plus 2% × £49,730 = £995, so about £3,257. Total tax: about £30,689. Take-home: about £69,311.
Limited company at £100,000 profit: director takes £12,570 salary, employer NI £1,139. Taxable profit: £86,291. Corporation tax at marginal relief: approximately £20,946. Post-tax dividends available: approximately £65,345. Director takes £37,200 in basic-rate dividends. Total personal income: £49,770. Dividend tax: 10.75% × £36,700 = £3,945. Total tax: approximately £26,030. Personal take-home from current income: approximately £42,540, with £27,645 retained in the company.
If the director takes all available profit as dividends, approximately £28,145 falls into the higher-rate band at 35.75%, adding approximately £10,062 in dividend tax. Full extraction take-home: approximately £52,044. Total tax: approximately £47,956. Compared to the sole trader's £31,820, the company is worse on full extraction. But if profit is partially retained, the picture reverses significantly.
Sole trader accountancy: a straightforward Self Assessment return typically costs £300–£800 per year. If your finances are simple, you can file your own return at no cost. Basic record-keeping is all you need.
Limited company accountancy: annual accounts to Companies House standard, a corporation tax return, a PAYE payroll and a confirmation statement. Total cost is typically £1,200–£2,000 per year, with some accountants charging more for complex extraction strategies. DIY is possible but carries more risk.
The net saving from incorporation must be calculated after deducting the extra accountancy cost. At £50,000 profit, where the tax saving is roughly £500–£1,500, the extra accountancy cost can eliminate the advantage entirely. At £80,000+, where the saving is more typically £3,000–£6,000, the arithmetic is much more comfortable.
Sole trader obligations are light: register as self-employed with HMRC, file a Self Assessment return each year, pay tax on time and keep basic business records. No Companies House involvement, no company accounts.
A limited company requires registration at Companies House, annual confirmation statements, annual accounts, a corporation tax return, a PAYE payroll and consistent separation of company and personal finances. These are legal obligations, not optional.
The extra accountancy cost of a limited company versus a sole trader is typically £1,000–£2,000 per year. That must be included in any comparison. A £500 annual tax saving that comes with a £1,500 additional accountancy bill is not a saving.
Retained company cash is one of the most powerful features of a limited company, and it is one that sole trader comparisons often miss. If you do not need every pound of profit immediately, the company retains it after paying corporation tax. You can extract it later, possibly at a more favourable personal tax rate, or reinvest it.
Company pension contributions reduce company profit before corporation tax and carry no NI. The same retirement saving made via a limited company costs less in total tax than an equivalent personal contribution as a sole trader. A £10,000 company pension contribution saves £1,900–£2,500 in corporation tax with no NI cost. A sole trader making the same contribution gets income tax relief but still pays Class 4 NI on the full underlying profit.
Some clients and public sector contracts require limited company status, which removes the tax comparison as the deciding factor. If your target work requires a company, the question becomes one of timing and transition planning rather than whether to incorporate.
Use SoleTraderTaxCalculator.co.uk for the sole trader result and this calculator for the limited company model. Enter the same profit on both.
Keep the commercial inputs identical: same profit, same pension, same other income. Change only the structure. That way the comparison shows a real structural difference rather than two different businesses.
If you are seriously considering incorporating, talk to a qualified accountant before acting. The comparison changes depending on your extraction needs, pension strategy, household cash requirements and whether you have an accountant who can handle the extra compliance efficiently.
No. The saving depends on profit level, extraction strategy, admin cost, retained profit plans and personal income. At lower profit levels the extra accountancy cost often outweighs any tax saving. The break-even point is typically around £35,000–£40,000 in profit.
As a rough guide, the tax saving typically starts to exceed the extra accountancy cost at around £40,000–£50,000 in profit, especially if you do not need to extract everything immediately. Below that, the admin cost often outweighs any saving. Above £70,000 the advantage is usually clear.
Use the same profit assumption on both. SoleTraderTaxCalculator.co.uk for the sole trader figure, this calculator for the limited company. Compare personal take-home and total tax on identical commercial inputs.
A sole trader pays Class 4 NI at 6% on profits between £12,570 and £50,270, and 2% above. A director taking salary at or below £5,000 pays zero NI personally and the company pays no employer NI. A director at £12,570 salary pays no personal NI, and the company pays £1,135.50 employer NI (covered by the Employment Allowance if eligible). Dividends attract no NI for either structure.
Yes. An accountant can plan the transition to minimise disruption and handle the correct treatment of any overlap period between sole trader and limited company phases.
Yes. Use the main calculator here for the limited company estimate and SoleTraderTaxCalculator.co.uk for the sole trader figure. Enter the same profit on both to get a like-for-like comparison.
The rates and rules on this page are drawn from the official UK government sources below, using the confirmed 2026/27 figures. Each link opens the relevant HMRC, GOV.UK or Companies House page in a new tab.
The limited company tax calculator turns this guidance into a concrete estimate for corporation tax, dividends and personal take-home, based on 2026/27 HMRC rates.