Comparison Guide · Updated May 2026
Sole Trader vs Limited Company in 2026/27: Which Is More Tax Efficient?
As a sole trader, all your profit is taxed as personal income — 20%, 40%, or 45% depending on your earnings — plus Class 4 National Insurance at 6%/2%. A limited company pays Corporation Tax at 19% on profits up to £50,000 (25% above £250,000), and you extract money as a salary plus dividends taxed at the lower 8.75%/33.75% rates. The question is not whether a limited company is more tax efficient — it almost always is above a certain profit level — but whether the tax saving outweighs the additional costs, complexity, and obligations. The break-even point in 2026/27 is approximately £35,000–£40,000 annual profit. This guide works through the numbers at three profit levels and explains when each structure wins.
10-Feature Side-by-Side Comparison
| Feature | Sole Trader | Limited Company |
|---|---|---|
| Setup | Register with HMRC for Self Assessment — free, online, 10 minutes | Incorporate at Companies House (£50 online); register for CT, PAYE, VAT |
| Admin burden | Annual Self Assessment tax return; basic bookkeeping | Annual accounts, CT600, confirmation statement, payroll, director Self Assessment |
| Liability protection | None — personal assets at risk if business debts arise | Limited liability — personal assets protected (subject to personal guarantees) |
| Tax rate on profit | Income tax 20/40/45% + Class 4 NI 6/2% | Corporation Tax 19% (profits ≤£50k), 25% above £250k; dividends at 8.75/33.75% |
| Expenses | Allowable business expenses reduce taxable profit | Same + company can provide benefits (phone, laptop, car) reducing personal tax |
| VAT | Register when turnover >£90k; same rules | Same registration threshold and rules |
| Pension | Personal pension contributions attract tax relief at marginal rate | Employer pension contributions are a pre-CT deduction — more tax efficient |
| National Insurance | Class 4 NI on profits; Class 2 (£3.45/wk) if profits >£12,570 | Director salary: employee + employer NI; dividends: no NI at all |
| Client perception | Some clients and agencies prefer or require limited company status | Often viewed as more professional; required for some public sector contracts |
| Exit / dissolution | Simply de-register with HMRC; no formal process | Must file final accounts, pay CT, apply for strike-off via Companies House |
2026/27 Tax Rates: The Foundations
Sole Trader Tax Rates
- Personal Allowance: £12,570 (no tax on first £12,570 of profit)
- Basic rate income tax: 20% on profit £12,571–£50,270
- Higher rate income tax: 40% on profit £50,271–£125,140
- Additional rate: 45% above £125,140
- Class 4 NI: 6% on profits £12,570–£50,270; 2% above £50,270
- Class 2 NI: £3.45/week if profits exceed £12,570 (provides NI record for state pension)
Limited Company Tax Rates 2026/27
- Corporation Tax: 19% on profits up to £50,000 (Small Profits Rate)
- Marginal relief applies between £50,000–£250,000 profits (effective marginal rate ~26.5%)
- Corporation Tax: 25% on profits above £250,000 (Main Rate)
- Optimal director salary: £12,570 (full personal allowance, no income tax, no employee NI; employer NI applies above £9,100 Secondary Threshold)
- Dividend Allowance: £500 tax-free
- Basic rate dividend tax: 8.75% (dividends in basic-rate band)
- Higher rate dividend tax: 33.75% (dividends in higher-rate band)
- Additional rate dividend tax: 39.35% (dividends above £125,140 total income)
Worked Example 1: £25,000 Annual Profit — Sole Trader Wins
£25,000 Profit — Tax Comparison 2026/27
| Step | Sole Trader | Limited Company |
|---|---|---|
| Taxable profit | £25,000 | £25,000 |
| Income tax on profit | £2,486 (20% on £12,430) | £0 (salary £12,570 takes personal allowance) |
| NI (Class 4 + Class 2) | £744 + £179 | Employer NI on salary above £9,100: £477 |
| Corporation Tax | — | £2,374 (19% on £12,430 residual) |
| Dividend tax on £9,576 residual | — | £798 (8.75% after £500 DA) |
| Total tax + NI | £3,409 | £3,649 |
| Accountancy fees (estimate) | £400 | £1,200 |
| Net take-home after all costs | ~£21,191 | ~£20,151 |
| Verdict | Sole trader wins by ~£1,040/yr |
Simplified for illustration. Ltd company takes £12,570 salary + remaining profit as dividend. Employer NI on salary above £9,100 = £477. Figures exclude VAT, expenses, and pension contributions. Consult a qualified accountant for your specific circumstances.
At £25,000 profit, the sole trader pays less tax and far lower accountancy fees. The limited company's tax saving is roughly £260 — entirely erased by the £800 extra in accounting costs. Verdict: remain a sole trader below £30,000 profit.
Worked Example 2: £50,000 Annual Profit — Broadly Equal
£50,000 Profit — Tax Comparison 2026/27
| Step | Sole Trader | Limited Company |
|---|---|---|
| Taxable profit | £50,000 | £50,000 |
| Income tax | £7,486 | £0 on salary; included in dividend calc below |
| NI (Class 4 + Class 2) | £2,246 + £179 | Employer NI on salary: £477 |
| Corporation Tax on residual (£37,430) | — | £7,112 (19%) |
| Dividend from net profit (£30,318) | — | £2,596 div tax (8.75% after DA) |
| Total tax + NI | £9,911 | £10,185 |
| Accountancy fees | £450 | £1,300 |
| Net take-home after all costs | ~£39,639 | ~£38,515 |
| Verdict | Sole trader marginally ahead |
Limited company: optimal structure takes £12,570 salary + balance as dividend. Employer NI applies on salary above Secondary Threshold (£9,100). Simplified for illustration.
At £50,000 profit, the difference narrows dramatically but the sole trader is still marginally ahead once accounting fees are included. This is the grey zone — the decision here turns on non-tax factors: do you need limited liability protection? Do clients require you to operate through a company? Are you planning to retain profits in the company rather than extract them all this year?
Worked Example 3: £80,000 Annual Profit — Limited Company Wins
£80,000 Profit — Tax Comparison 2026/27
| Step | Sole Trader | Limited Company |
|---|---|---|
| Taxable profit | £80,000 | £80,000 |
| Income tax | £17,432 | £0 on salary portion |
| NI (Class 4 + Class 2) | £3,446 + £179 | Employer NI on salary: £477 |
| Corporation Tax on £67,430 (after salary) | — | £12,812 (19% on first £50k + marginal relief) |
| Net profit available for dividend | — | ~£54,141 |
| Dividend tax (£500 DA, then 8.75%/33.75%) | — | ~£4,100 (blended basic/higher rate) |
| Total tax + NI | £21,057 | £17,389 |
| Accountancy fees | £500 | £1,400 |
| Net take-home after all costs | ~£58,443 | ~£61,211 |
| Verdict | Ltd company saves ~£2,768/yr |
Assumes all profits extracted each year. Retaining profits in the company defers personal tax further. CT marginal relief applies between £50k–£250k profits. Simplified for illustration.
At £80,000 profit, the limited company saves approximately £2,768 per year after accounting for higher accountancy fees. This is a real and growing saving — but it is less dramatic than many business owners expect. At £120,000 profit, the saving grows to approximately £6,000–£8,000/year, making incorporation clearly worthwhile.
The IR35 Factor: When Incorporation Backfires
If you operate through a limited company primarily for one client — as many IT, finance, and engineering contractors do — HMRC's IR35 rules may apply. The three key tests are:
- Control: Does the client control when, where, and how you work? If yes, points toward inside IR35.
- Substitution: Can you send a substitute to do the work if you are unavailable? If no, points toward inside IR35.
- Mutuality of Obligation: Is there an expectation that the client will offer work and you will accept it? If yes, points toward inside IR35.
If HMRC or your client determines you are inside IR35, all income from that engagement must be processed through payroll — income tax and full NI apply as if you were an employee. The limited company tax advantage disappears entirely. You still have company admin costs, and in some cases end up with less take-home than you would as a sole trader or umbrella employee.
For public sector and medium-to-large private sector engagements, the client is responsible for determining IR35 status (off-payroll working rules). For small private sector clients (fewer than 50 employees, turnover under £10.2m), the IR35 determination responsibility remains with you, the contractor. Always take professional advice before structuring any client engagement through a limited company.
Retaining Profits in a Limited Company
One powerful limited company advantage not captured in the worked examples above is the ability to retain profits in the company and only extract them when personally tax-advantageous. A sole trader cannot do this — all profit is taxed in the year it arises, regardless of whether you draw it.
For example, if your company makes £80,000 in year 1 but you only extract £40,000 in salary and dividends, the remaining £40,000 sits in the company paying 19% CT. In year 2, if you have a lighter year (£30,000 profit), you can draw the retained profit as dividends at the basic-rate band rate (8.75%) rather than the higher rate (33.75%). This income-smoothing across years can significantly reduce your lifetime tax bill, particularly if your income fluctuates year to year.
Which Structure Should You Choose?
| Profit Level | Recommended Structure | Reason |
|---|---|---|
| Under £30,000 | Sole Trader | Tax saving minimal; accounting costs wipe out any benefit |
| £30,000–£40,000 | Sole Trader (borderline) | Consider if liability protection or client requirements apply |
| £40,000–£50,000 | Either (grey zone) | Incorporate if: retaining profits, need liability protection, clients require it |
| £50,000–£100,000 | Limited Company | Meaningful tax saving (£1,500–£6,000/yr after fees); income smoothing possible |
| Above £100,000 | Limited Company | Large tax saving; pension via company; higher CT marginal rate still beats income tax |
Related Guides and Tools
See our Sole Trader vs Limited Company overview for a broader structural comparison, or use the Self-Employed Tax Calculator to see your take-home as a sole trader. For contractors, read IR35 Explained before making any incorporation decision.