Employee vs Self-Employed Tax UK
Same income tax, different National Insurance, very different expense rules — what changes for take-home pay when you switch between employment and self-employment in the UK.
Side-by-side comparison
| Aspect | Employee (PAYE) | Self-Employed (Sole Trader) |
|---|---|---|
| Income tax bands | 20% / 40% / 45% | 20% / 40% / 45% (same) |
| NI on £12,570-£50,270 | Class 1: 8% | Class 4: 6% |
| NI above £50,270 | Class 1: 2% | Class 4: 2% (same) |
| State Pension credits | Automatic via Class 1 | Automatic via Class 2 (voluntary if profits below LPL) |
| Sick / maternity pay | SSP, SMP, SPP | No SSP/SMP — Maternity Allowance via DWP |
| Pension | Workplace + auto-enrolment (3% employer min) | Personal pension / SIPP — self-arranged |
| Allowable expenses | Narrow (necessarily incurred) | Wholly and exclusively for trade — much wider |
| Tax collection | PAYE every payday | SA by 31 Jan + payments on account |
| Holiday pay | 5.6 weeks statutory | None |
Worked take-home: 2025-26
Comparing approximate take-home pay at three income points (no pension, no student loan, England/Wales/NI):
| Gross | Employee take-home | Self-employed take-home | Difference |
|---|---|---|---|
| £30,000 | ~£24,920 | ~£25,270 | +£350 |
| £50,000 | ~£39,800 | ~£40,360 | +£560 |
| £80,000 | ~£56,800 | ~£57,300 | +£500 |
Figures rounded; ignores allowable business expenses (which can widen the gap further) and assumes employer pays separately for Class 1A NI on the employee side.
Frequently asked questions
Do employees and self-employed people pay the same income tax?
Yes — UK income tax bands and rates are identical: 20% basic, 40% higher, 45% additional, with the same £12,570 Personal Allowance and £100,000 taper. The difference is in National Insurance, allowable expenses, and how the tax is collected.
What's the difference in National Insurance?
Employees pay Class 1 NI: 8% from £12,570 to £50,270, 2% above. Employers pay a separate 15% Class 1A. Self-employed pay Class 2 (voluntary) for State Pension credits and Class 4: 6% from £12,570 to £50,270, 2% above. Self-employed Class 4 is materially lower than employee Class 1 — a £40k earner saves roughly £550/year on NI alone.
Can self-employed people deduct more expenses?
Yes. Self-employed taxpayers can deduct any cost that is "wholly and exclusively for the trade" — accountancy fees, business mileage, home office, phone, professional subscriptions, training, equipment via capital allowances. Employees are limited to a narrower set under section 336 ITEPA (necessarily incurred), and most home-office or commute costs are disallowed.
Do self-employed people qualify for State Pension and benefits?
Yes. Self-employed people earning over the Lower Profits Limit get automatic Class 2 NI credits for State Pension. Below that, you can pay voluntary Class 2 to keep the qualifying year. Self-employed are not eligible for Statutory Sick Pay or Statutory Maternity Pay; they can claim Maternity Allowance via DWP instead.
When is tax due — payslip vs annual return?
Employees pay through PAYE every payday — tax is settled in real time. Self-employed file Self Assessment by 31 January and pay the bill by the same date, plus payments on account on 31 Jan and 31 July if liable. Cash-flow planning matters more for self-employed — many set aside ~25-30% of income for tax + NI.
What about pension contributions?
Employees often have a workplace pension with employer contributions (minimum 3%) and auto-enrolment from age 22. Self-employed must arrange their own pension — personal pension or SIPP — and get tax relief at marginal rate via Self Assessment. The annual allowance is £60,000 for both.
If I'm at £50,000, who has more take-home?
In 2025-26 at £50,000 gross: an employee on PAYE keeps roughly £39,800 after tax and NI. A self-employed sole trader with the same £50,000 net profit (no expenses claimed beyond the personal trading allowance) keeps roughly £40,400 — about £600 more per year, mostly from the lower Class 4 NI. Add even modest deductible expenses and the gap widens.
Should I incorporate as a limited company?
Above ~£40,000-£50,000 of net profit, a limited company can be more tax-efficient via salary + dividends, but adds Corporation Tax, accountancy costs (£500-£1,500/year), Companies House filings, and IR35 risk if working for one client. Use our contractor comparison calculator for a side-by-side. Below £30,000 sole trader almost always wins.
Try the relevant calculators
- UK Take-Home Pay Calculator — employee net pay
- Self-Employment Tax Calculator — sole trader Class 4 + income tax
- Contractor Comparison Calculator — sole trader vs limited company vs umbrella
- National Insurance Calculator — Class 1 / 2 / 4 side-by-side
- IR35 Calculator — inside vs outside off-payroll rules
Related Calculators
Self-Employed Deduction Wizard
Occupation-aware allowable expenses checklist with simplified mileage, use-of-home flat rates, and trading allowance comparison.
Self Assessment Payment on Account Calculator
Work out your 31 January and 31 July POAs, claim a reduction via SA303, and model late-payment interest and penalties.
National Insurance Calculator
Class 1, 2 & 4 NI for employed and self-employed.