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
£18,107.87
Monthly net income
£1,508.99
Weekly net income
£348.23
Quarterly set-aside
£946.07
Set aside £946.07 per quarter. Payment dates are typically 31 January and 31 July.

Full breakdown

Annual profit£20,000.00
Income tax£1,446.33
Class 4 NI£445.80
Student loan£0.00
Total deductions£1,892.13
Net income£18,107.87

Income tax by band

Band Rate Taxable amount Tax
Starter rate 19.0% £3,967.00 £753.73
Basic rate 20.0% £3,463.00 £692.60
Intermediate rate 21.0% £0.00 £0.00
Higher rate 42.0% £0.00 £0.00
Advanced rate 45.0% £0.00 £0.00
Top rate 48.0% £0.00 £0.00

Class 4 NI by band

Range Rate Profit in band NI
£12,570 to £50,270 6.0% £7,430.00 £445.80
Above £50,270 2.0% £0.00 £0.00