Answers · UK 2025/26

How much tax and National Insurance do I pay on £150,000 self-employed profit?

On £150,000 of self-employed taxable profit in 2026/27, you pay £53,703 Income Tax and £4,256.60 Class 4 National Insurance, keeping £92,040.40 after tax and NI.

Last updated: 3 July 2026Last reviewed: 3 July 2026How we verify

Full answer

For a self-employed sole trader with £150,000 of taxable profit in 2026/27, the Personal Allowance is fully withdrawn, so all £150,000 is taxable. The first £37,700 is taxed at 20% (£7,540), the next £87,440 (up to £125,140) at 40% (£34,976), and the remaining £24,860 above £125,140 at the 45% additional rate (£11,187), giving total Income Tax of £53,703. Class 4 National Insurance is charged at 6% on profit between £12,570 and £50,270 (£2,262), plus 2% on the £99,730 above £50,270 (£1,994.60), giving £4,256.60. Total deductions leave £92,040.40 after tax and National Insurance -- an overall effective tax and NI rate of just over 38.6%. Self Assessment Payments on Account at this profit level are substantial, typically each equal to half of the total tax and Class 4 National Insurance liability, so many self-employed people at £150,000 set aside 40-45% of monthly income in a separate account to avoid a cash-flow shock in January and July.