Home / Guides / Sole Trader vs Limited Company: Complete Tax Comparison 2026/27
Choosing between sole trader and limited company is a tax and lifestyle decision. The right answer depends on your profit level, how much you need to extract, your pension plans and your appetite for administrative complexity. This guide gives a complete numerical comparison for 2026/27 across three profit levels, a breakdown of the NI difference, and a clear view of when switching becomes worthwhile.
Last updated May 2026. Written by the LimitedCompanyTaxCalculator.co.uk editorial team and reviewed against current GOV.UK and HMRC guidance. Results are estimates for planning only and are not tax, accounting or financial advice.
Income tax rates are identical for sole traders and limited company directors — both pay 20% basic rate, 40% higher rate and 45% additional rate on personal income above the personal allowance of £12,570 for 2026/27.
The difference is what counts as personal income. A sole trader's taxable profit is personal income directly — the full profit figure flows into their Self Assessment return. A limited company director's personal income is only what they extract: salary plus dividends. Profit retained in the company is not personal income until it is distributed. This distinction is the core advantage of a limited company for anyone who does not need to extract all profit immediately.
Dividend income is taxed at different rates to salary and self-employment income: 8.75% (basic rate), 33.75% (higher rate), 39.35% (additional rate) for 2026/27. These rates are lower than the equivalent income tax rates, creating a structural tax saving when extraction is taken as dividends rather than salary or profit.
National Insurance is where the structural difference is most significant. Sole traders pay Class 4 NI at 9% on profits between £12,570 and £50,270, and 2% on profits above £50,270. At £80,000 profit, Class 4 NI is approximately £3,393 (9% × £37,700) plus £597 (2% × £29,730) = approximately £3,990.
A limited company director taking salary at £9,100 (the NI secondary threshold for 2026/27) pays zero employee NI and the company pays zero employer NI. Dividends taken on top attract no NI at all. Total NI at any level of dividend extraction: £0.
A director taking salary at £12,570 incurs employer NI of approximately £1,139 (15% × (£12,570 − £5,000)). Employee NI at 8% applies on salary between £12,570 and £50,270, but since the salary is at £12,570 and NI starts above this level, employee NI is also £0. Total NI: £1,139 employer NI only — versus approximately £3,990 Class 4 NI for the sole trader at £80,000 profit. The director saves approximately £2,851 in NI at this profit level.
Unlike a sole trader, a limited company pays corporation tax on its profits before any extraction. For 2026/27: 19% on profits up to £50,000; 25% on profits above £250,000; marginal relief applies between £50,000 and £250,000, producing an effective rate that rises from 19% to 25%.
Corporation tax is often described as the cost of the limited company structure. The comparison is not 'corporation tax vs no corporation tax' — it is corporation tax plus lower-rate dividend extraction vs income tax plus Class 4 NI on the full profit. At most profit levels from £40,000 upwards, the dividend route produces a lower combined tax than the sole trader route.
The marginal relief band (£50,000–£250,000) has an effective marginal rate of approximately 26.5% on the last pound of profit, which is higher than either boundary rate. This creates a planning incentive: reducing profit within this band through director pension contributions saves approximately 26.5p per pound in corporation tax, with no NI cost.
Sole trader at £50,000 profit (England, 2026/27): income tax on £37,430 above personal allowance — £7,486. Class 4 NI: 9% × £37,700 = £3,393 (capped at upper earnings limit). Total tax: approximately £10,879. Net take-home: approximately £39,121.
Limited company at £50,000: director takes £12,570 salary. Employer NI: £1,139. Taxable profit: £50,000 − £12,570 − £1,139 = £36,291. Corporation tax at 19%: £6,895. Post-tax dividends available: approximately £29,396. Director takes all £29,396 as dividends. Total personal income: £41,966. Dividend tax: £500 allowance, then £28,896 at 8.75% = £2,528. Total tax across all layers: £10,562. Personal take-home: approximately £39,438.
The limited company saves approximately £317 at £50,000 profit. After the extra accountancy cost of approximately £1,200–£2,000 per year, the sole trader structure is financially preferable at this level for most people. The break-even depends heavily on individual accountancy fees.
Sole trader at £80,000 profit (England, 2026/27): income tax — 20% on £37,700 = £7,540, plus 40% on £29,730 = £11,892. Total income tax: £19,432. Class 4 NI: 9% × £37,700 = £3,393, plus 2% × £29,730 = £595. Total NI: £3,988. Total tax: approximately £23,420. Net take-home: approximately £56,580.
Limited company at £80,000: director takes £12,570 salary, employer NI £1,139. Taxable profit: £66,291. Corporation tax at marginal relief rate: approximately £16,048. Post-tax dividends available: approximately £50,243. Director takes £37,200 basic-rate dividends (to stay in basic rate band). Total personal income: £49,770. Dividend tax: 8.75% × £36,700 = £3,211. Total tax: £20,398. Personal take-home from current income: approximately £46,359. Retained in company: approximately £13,043.
If the director extracts all £50,243 as dividends, approximately £12,543 falls into the higher rate band at 33.75% = £4,233 additional dividend tax. Full extraction take-home: approximately £57,671. Total combined tax on full extraction: approximately £22,371. Compared to sole trader total tax of £23,420, the limited company saves approximately £1,049 on full extraction — and more if profit is partially retained.
Sole trader at £100,000 profit (England, 2026/27): income tax — 20% on £37,700 = £7,540, plus 40% on £49,730 = £19,892. Total income tax: £27,432. Class 4 NI: 9% × £37,700 = £3,393, plus 2% × £49,730 = £995. Total NI: £4,388. Total tax: approximately £31,820. Net take-home: approximately £68,180.
Limited company at £100,000: director takes £12,570 salary, employer NI £1,139. Taxable profit: £86,291. Corporation tax at marginal relief rate: approximately £20,946. Post-tax dividends available: approximately £65,345. Director takes £37,200 basic-rate dividends. Dividend tax: £3,211. Total tax: approximately £25,296. Personal take-home from current income: approximately £46,359. Retained: approximately £28,145.
If the director extracts all £65,345 as dividends, higher-rate dividend tax on approximately £28,145 at 33.75% = £9,499. Full extraction total tax: approximately £34,795. This is approximately £2,975 more than the sole trader at £100,000. However, if £28,145 is retained in the company and later extracted in a year with lower personal income, the total combined tax over time will be materially lower. The retained-profit flexibility is the defining limited company advantage at higher profit levels.
As a rule of thumb, the tax saving from a limited company typically exceeds the additional accountancy cost at approximately £40,000–£50,000 in profit, but only clearly so above approximately £60,000–£70,000 in profit. Below £40,000, the numbers rarely support incorporation on tax grounds alone.
The case for incorporating strengthens significantly when: (1) you do not need to extract all profit immediately and can benefit from retained profit deferral; (2) you plan to make significant pension contributions — director pension contributions via the company are more tax-efficient than personal contributions as a sole trader; (3) your profit is consistently above £60,000; or (4) commercial or contractual reasons require a company structure.
The case against incorporating: the additional admin and accountancy cost; the complexity of managing company accounts, payroll and Companies House filings; the discipline of separating personal and company finances; and the loss of simplicity that makes sole trading attractive at lower income levels. These are real costs that tax calculations frequently understate.
Director pension contributions via a limited company offer a significant tax advantage that is absent from the sole trader comparison. Employer pension contributions reduce company profit before corporation tax, attract no employer or employee NI, and do not count as personal income.
A director contributing £20,000 to a pension via the company saves approximately £4,600–£5,300 in corporation tax (depending on the applicable rate) and avoids £3,000 in employer NI that would apply if the same amount were paid as salary. A sole trader making the same pension contribution gets basic rate income tax relief but still pays Class 4 NI on the full profit before the contribution.
For directors who plan to save significantly for retirement, this pension advantage can make the limited company financially worthwhile at profit levels where the pure extraction comparison is borderline.
No. At lower profit levels (under approximately £40,000–£50,000), the combined taxes for a limited company often exceed those of a sole trader when the actual extraction costs are modelled, and the administrative overhead further reduces the advantage. The limited company becomes genuinely more efficient at higher profits, particularly when some profit is retained.
Class 4 NI at 9% on profits between £12,570 and £50,270, and 2% on profits above £50,270. Class 2 NI is now collected via Self Assessment. A limited company director taking salary at £9,100 pays zero NI; taking salary at £12,570 means the company pays employer NI of approximately £1,139.
Dividend tax rates are 8.75% (basic), 33.75% (higher) and 39.35% (additional). Income tax rates are 20% (basic), 40% (higher) and 45% (additional). The difference — approximately 11–12 percentage points at basic and higher rate — is the structural tax saving from extracting income as dividends rather than salary.
As a rough guide, seriously consider incorporation at around £50,000–£60,000 in profit. The tax saving typically exceeds the additional accountancy cost at this level if you don't need to extract everything immediately. Above £70,000–£80,000, the advantage is clearer. Below £40,000, the numbers rarely support incorporation on tax grounds alone.
Use SoleTraderTaxCalculator.co.uk for the sole trader result and this calculator for the limited company model. Enter the same profit figure on both. Keep pension, extraction level and other income identical. Compare personal take-home and total tax at identical commercial inputs.
Yes. Limited liability protects personal assets if the business faces claims. Some clients and public sector bodies require limited company status. A company structure may improve commercial credibility. These factors can make incorporation worthwhile at profit levels where the tax comparison alone is marginal.
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.