Self-Employed Tax Calculator UK (2026/27)

Estimate take-home profit after income tax and Class 4 National Insurance, with optional student loan deductions. Results update instantly and include a quarterly set-aside estimate for payments on account.

Updated for 2026/27 · Reviewed by James Whitfield · Methodology and assumptions

£

Results

Annual net income
£171,540.40
Monthly net income
£14,295.03
Weekly net income
£3,298.85
Quarterly set-aside
£64,229.80
Set aside £64,229.80 per quarter. Payment dates are typically 31 January and 31 July.

Full breakdown

Annual profit£300,000.00
Income tax£121,203.00
Class 4 NI£7,256.60
Student loan£0.00
Total deductions£128,459.60
Net income£171,540.40

Income tax by band

Band Rate Taxable amount Tax
Basic rate 20.0% £37,700.00 £7,540.00
Higher rate 40.0% £87,440.00 £34,976.00
Additional rate 45.0% £174,860.00 £78,687.00

Class 4 NI by band

Range Rate Profit in band NI
£12,570 to £50,270 6.0% £37,700.00 £2,262.00
Above £50,270 2.0% £249,730.00 £4,994.60