Self-employed Income Tax and NI estimate
Enter your turnover and allowable expenses to estimate sole-trader Income Tax and Class 4 NI for 2026/27.
Before you start: This covers sole-trader profit in England, Wales or Northern Ireland. It leaves out employment income, dividends, savings, pensions, student loans, losses, payments on account and other adjustments. It does not complete a tax return. No compulsory Class 2 payment or voluntary NI contribution is added.
Enter your figures
Your calculation
| Profit before tax | £50,000.00 |
|---|---|
| Estimated Income Tax | £7,486.00 |
| Class 4 NI | £2,245.80 |
| Profit after these deductions | £40,268.20 |
Check your result
Results update as you type. Check the figures against your records and read the limits above. The calculator cannot tell you whether you qualify for a tax relief or complete a tax return for you.
Official guidance
Read the rules for this calculation. Source checked 23 October 2026. Amounts are in pounds. Rates are for 2026/27 unless the page gives a different date.