Sole Trader vs Limited Company: Which Is Right for Your Business?
The April 2026 dividend tax increases have changed the calculation. The tax case for incorporation is no longer as clear-cut as it was. Here’s a plain-English comparison of both structures — tax, liability, costs, and admin — with current 2026/27 figures. Get it right, and you pay less tax, protect your personal assets, and set the business up properly. Get it wrong, and you pay more than you need to, or take on unnecessary complexity.
The fundamental difference
| Sole trader | Limited company | |
|---|---|---|
| Legal identity | You and your business are the same legal entity | The company is a separate legal entity with its own legal existence, finances, and tax obligations. You, as the director, are an employee and shareholder — distinct from the business itself |
| Liability | Personally liable for all business debts and claims | Liability generally limited to your investment in the company |
| Tax | Income Tax and NIC on business profits — one layer of tax | Corporation Tax on profits, then personal tax on salary and dividends — two layers |
| Accounts | Private — not filed publicly | Filed annually at Companies House — publicly visible |
| Admin | One Self Assessment per year (plus quarterly MTD from April 2026 if income over £50k) | Annual accounts, CT return, confirmation statement, PAYE, personal Self Assessment |
Sole trader: how it works
Setting up as a sole trader is simple — register with HMRC for Self Assessment, declare yourself self-employed, and begin trading. No Companies House registration, no public accounts, no separate legal entity.
Tax rates for sole traders (2026/27)
| Income | Income Tax rate | Class 4 NIC rate |
|---|---|---|
| Up to £12,570 (Personal Allowance) | 0% | 0% |
| £12,570 – £50,270 | 20% (basic rate) | 6% |
| £50,270 – £125,140 | 40% (higher rate) | 2% |
| Above £125,140 | 45% (additional rate) | 2% |
Total effective tax burden at £50,000 profit is roughly 30–33%, once Income Tax and Class 4 NIC are combined.
Limited company: how it works
A limited company is incorporated at Companies House (£50 online). The company pays Corporation Tax on its profits; you pay tax personally on salary and dividends extracted from the company.
Corporation Tax rates (2026/27)
| Company profits | Rate |
|---|---|
| Up to £50,000 | 19% (small profits rate) |
| £50,000 – £250,000 | 19–25% (marginal relief) |
| Above £250,000 | 25% (main rate) |
Dividend tax rates (from 6 April 2026)
| Dividend income (above £500 allowance) | Rate from 6 April 2026 | Previous rate |
|---|---|---|
| Basic rate band | 10.75% | 8.75% |
| Higher rate band | 35.75% | 33.75% |
| Additional rate band | 39.35% | 39.35% (unchanged) |
The tax comparison
The tax difference is small and often wiped out by the additional accountancy costs a limited company brings (typically £800–£1,500 more per year). A sole trader is simpler and cheaper at this level.
The April 2026 dividend tax increases have narrowed the advantage here. The breakeven point — where tax savings outweigh extra costs — is typically around £30,000–£35,000. At £50,000 profit, the saving from incorporation is meaningful but smaller than it was in 2025/26.
The limited company structure still delivers a meaningful tax advantage at higher profits, even after the April 2026 changes. Employer pension contributions — tax-deductible and free of NIC — further improve the picture for directors.
The optimal director salary
For most single director-shareholder companies, the most tax-efficient approach is still a salary around the personal allowance (£12,570), which avoids income tax on the salary and minimises employee National Insurance contributions, while still being tax-deductible for the company. Additional income is then drawn as dividends. However, the April 2025 reduction in the employer NIC threshold from £9,100 to £5,000 — combined with the April 2026 dividend tax increases — means the optimal salary level is genuinely worth discussing with your accountant. And the Employment Allowance cannot be claimed by sole director companies. A blanket “pay yourself £12,570” is no longer the right answer for every situation.
The non-tax differences
| Factor | Sole trader | Limited company |
|---|---|---|
| Personal liability | Personally liable for all debts and claims — personal assets at risk | Liability generally limited to share capital. Personal assets protected (unless personal guarantees given) |
| Privacy | Accounts completely private | Annual accounts filed at Companies House — publicly visible |
| Admin | One Self Assessment per year. MTD quarterly submissions from April 2026 if income over £50k | Annual accounts, CT return, confirmation statement, PAYE, personal Self Assessment — accountancy costs £800–£2,500+/year |
| Credibility | Fine for most clients | Public sector and larger businesses often prefer or require incorporated suppliers |
| MTD for Income Tax | Mandatory from April 2026 (£50k+ income), April 2027 (£30k+) | Not applicable — companies file CT600 returns separately |
When does it make sense to incorporate?
- Profits consistently above £30,000–£35,000 — the point where, after accountancy costs, the tax saving typically starts to outweigh the additional complexity.
- Significant personal liability risk — large contracts, physical activities, professional liability exposure, or any work where a mistake could generate a major claim against you personally.
- Contracts or clients that require it — if a meaningful portion of your target market requires or strongly prefers incorporated suppliers, the practical case is clear.
- Plans to take on employees and grow — limited companies have a more established framework for employment, equity, and future investment.
- Long-term plans to sell the business — generally easier to sell and offers more structuring options for an exit.
- Wanting to retain profits in the business — leave profits in the company at 19–25% Corporation Tax rather than withdrawing them immediately at income tax rates.
When is a sole trader the right choice?
- You’re just starting out — no point paying extra accountancy fees for a structure that doesn’t yet offer tax savings when profits are uncertain.
- Profits are below £30,000 — the tax difference is minimal and simplicity is valuable.
- Your clients don’t require incorporation — if all your work comes from individuals or small businesses who don’t care about your legal structure, there’s no practical pressure.
- You value simplicity — one tax return per year, no Companies House filings, no corporate admin overhead.
- Your business carries minimal liability risk — consultancy, writing, design, and many other low-risk service businesses often don’t need the protection of limited liability.
How to switch from sole trader to limited company
The process is more straightforward than many expect:
Register a limited company online at companieshouse.gov.uk — £50, takes around 24 hours. You’ll receive a Certificate of Incorporation and company number.
The company needs its own bank account in the company name. Personal and company finances must be kept completely separate from day one.
Notify clients, update contracts, and begin invoicing through the company. Your accountant can advise on the most tax-efficient transfer date.
Register the company with HMRC for Corporation Tax (done automatically on incorporation), PAYE if you’ll take a salary, and VAT if applicable.
Your accountant handles the final Self Assessment for the period up to cessation as a sole trader. Note: any losses built up as a sole trader cannot transfer to the company.
Useful resources
- Companies House incorporation — register a limited company online at gov.uk/limited-company-formation — £50
- HMRC Self Assessment — for sole traders and directors with dividend income at gov.uk/self-assessment-tax-returns
- HMRC Corporation Tax — gov.uk/corporation-tax
- Your accountant — the most important resource for this decision. A 30-minute conversation with an accountant who knows your numbers will give you a clear answer for your specific situation. The right answer changes every time tax rates change — which is often.
More guides for UK small business owners
Right Hand Man covers everything from business structure to VAT, PAYE, hiring your first employee, and writing a business plan. Browse our guides or get in touch if you have a question.