Self-Employment Guides UK — Tax, Business Setup, and Running Your Own BusinessLtd Company vs Sole Trader for Tax — Full Comparison UK 2026
Compare limited company vs sole trader for tax in the UK. Income tax, National Insurance, dividends, and which structure saves you more money.
Sole trader or limited company? Tax is a major factor in this decision. Here’s a detailed comparison.
Quick Comparison
| Factor | Sole Trader | Limited Company |
|---|
| Tax on profits | Income tax + NI | Corporation Tax |
| How you get paid | Draw from business | Salary + dividends |
| Top tax rate | 45% + NI | ~25% CT + dividend tax |
| Admin | Simple | More complex |
| Accounting costs | £200-500/year | £1,500-3,000/year |
| Legal liability | Personal (unlimited) | Limited to company |
Sole Trader Taxation
How It Works
All business profits are taxed as your personal income.
| Component | Calculation |
|---|
| Profit | Income minus expenses |
| Income tax | Based on tax bands |
| Class 2 NI | £3.45/week |
| Class 4 NI | 9% / 2% on profits |
Sole Trader Tax Rates (2025/26)
| Profit Band | Income Tax | Class 4 NI | Combined |
|---|
| Up to £12,570 | 0% | 0% | 0% |
| £12,571-£50,270 | 20% | 9% | 29% |
| £50,271-£125,140 | 40% | 2% | 42% |
| Over £125,140 | 45% | 2% | 47% |
Sole Trader Tax Example: £50,000 Profit
| Component | Calculation | Tax |
|---|
| Personal allowance | £12,570 | £0 |
| Basic rate (£12,571-£50,000) | £37,430 × 20% | £7,486 |
| Class 2 NI | 52 weeks × £3.45 | £179 |
| Class 4 NI | £37,430 × 9% | £3,369 |
| Total tax | | £11,034 |
Take-home: ~£38,966
Limited Company Taxation
How It Works
Company pays Corporation Tax. You extract money via salary and dividends.
| Step | Tax |
|---|
| Company profits | Corporation Tax (19-25%) |
| Your salary | Income tax + NI |
| Your dividends | Dividend tax (no NI) |
Corporation Tax Rates (2025/26)
| Profit | Rate |
|---|
| Under £50,000 | 19% |
| £50,000-£250,000 | 26.5% effective (marginal relief) |
| Over £250,000 | 25% |
Dividend Tax Rates
| Band | Dividend Rate |
|---|
| Dividend allowance | £500 tax-free |
| Basic rate band | 8.75% |
| Higher rate band | 33.75% |
| Additional rate band | 39.35% |
Limited Company Tax Example: £50,000 Profit
Strategy: £12,570 salary + rest as dividends
| Component | Calculation | Amount |
|---|
| Company Level | | |
| Profit before salary | £50,000 | |
| Salary paid | -£12,570 | |
| Employer NI (~£478) | -£478 | |
| Taxable profit | £36,952 | |
| Corporation Tax (19%) | | £7,021 |
| Profit after CT | | £29,931 |
| | |
| Personal Level | | |
| Salary tax | £0 (within allowance) | |
| Dividend (£29,931) | | |
| Less dividend allowance | -£500 | |
| Taxable dividend | £29,431 | |
| Dividend tax (8.75%) | | £2,575 |
| | |
| Total Tax | | |
| Corporation Tax | | £7,021 |
| Employer NI | | £478 |
| Dividend tax | | £2,575 |
| Total | | £10,074 |
Take-home: ~£39,926
Side-by-Side Comparison at Different Profit Levels
£30,000 Profit
| Sole Trader | Limited Company | Difference |
|---|
| Tax paid | ~£4,988 | ~£5,150 | Ltd pays ~£162 more |
| Take-home | ~£25,012 | ~£24,850 | |
| Accounting costs | ~£300 | ~£1,500 | |
| Net benefit | | | Sole trader wins |
£50,000 Profit
| Sole Trader | Limited Company | Difference |
|---|
| Tax paid | ~£11,034 | ~£10,074 | Ltd saves ~£960 |
| Take-home | ~£38,966 | ~£39,926 | |
| Accounting costs | ~£400 | ~£1,800 | |
| Net benefit | | | Marginal — consider other factors |
£80,000 Profit
| Sole Trader | Limited Company | Difference |
|---|
| Tax paid | ~£24,054 | ~£19,500 | Ltd saves ~£4,554 |
| Take-home | ~£55,946 | ~£60,500 | |
| Accounting costs | ~£500 | ~£2,000 | |
| Net benefit | | | Ltd company wins (~£3,054) |
£100,000 Profit
| Sole Trader | Limited Company | Difference |
|---|
| Tax paid | ~£34,054 | ~£26,000 | Ltd saves ~£8,054 |
| Take-home | ~£65,946 | ~£74,000 | |
| Accounting costs | ~£500 | ~£2,500 | |
| Net benefit | | | Ltd company wins (~£5,554) |
When Sole Trader Wins
| Situation | Why Sole Trader |
|---|
| Profit under £40,000 | Tax similar, less admin |
| Value simplicity | Much easier to manage |
| Variable income | Flexibility easier |
| Side hustle | Not worth the complexity |
| Don’t want company admin | No filings, simpler accounts |
When Limited Company Wins
| Situation | Why Ltd |
|---|
| Profit over £50,000 | Meaningful tax savings |
| Want liability protection | Company is separate legal entity |
| Planning to grow | More professional structure |
| Bringing in investors | Easier to sell shares |
| Multiple owners | Better profit sharing |
Additional Considerations
Accounting Costs
| Structure | Typical Annual Cost |
|---|
| Sole trader (DIY) | £0-100 |
| Sole trader (accountant) | £200-500 |
| Limited company | £1,500-3,000 |
Factor this into your comparison.
Pension Contributions
| Structure | Pension Treatment |
|---|
| Sole trader | Personal contributions, income tax relief |
| Limited company | Company contributions, CT deduction + no NI |
Company pension contributions can be very tax-efficient.
Retained Profits
| Structure | Keeping Money in Business |
|---|
| Sole trader | All profit taxed whether taken or not |
| Limited company | Only CT on profit; take when needed |
If you don’t need all profits immediately, Ltd lets you defer personal tax.
Dividend Rules
| Requirement | Details |
|---|
| Must have profit | Can’t pay dividends without retained profit |
| Board meeting | Must declare properly |
| Dividend voucher | Documentation required |
| Same % per share | Can’t be selective |
IR35 Warning
If you’re a contractor and would be “employed” without your company:
| IR35 Status | Tax Treatment |
|---|
| Inside IR35 | Taxed like employment — no Ltd benefit |
| Outside IR35 | Full salary + dividend benefits |
Check IR35 status before assuming Ltd saves tax.
Making the Switch
Sole Trader to Limited Company
| Step | Action |
|---|
| 1 | Register company at Companies House |
| 2 | Open business bank account |
| 3 | Register for Corporation Tax |
| 4 | Set up payroll (for salary) |
| 5 | Transfer business assets |
| 6 | Continue sole trader SA for transition year |
Consider Professional Advice
| Reason | Value |
|---|
| Correct timing | Avoid double taxation |
| Asset transfer | May have CGT implications |
| VAT registration | May trigger if not already VAT registered |
| Future planning | Structure for your goals |
Summary: Decision Guide
| Your Profit | Recommendation |
|---|
| Under £30,000 | Sole trader |
| £30,000-£40,000 | Probably sole trader |
| £40,000-£50,000 | Borderline — consider other factors |
| £50,000-£70,000 | Limited company likely better |
| Over £70,000 | Limited company |
Other factors that push towards Ltd:
- Need liability protection
- Want to retain profits in business
- Planning to bring in partners/investors
- Professional image important
Other factors that push towards sole trader:
- Value simplicity
- Income varies significantly
- Don’t want accounting overhead
- Side business alongside employment
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