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
£34,263.13
Monthly net income
£2,855.26
Weekly net income
£658.91
Quarterly set-aside
£3,868.43
Set aside £3,868.43 per quarter. Payment dates are typically 31 January and 31 July.

Full breakdown

Annual profit£42,000.00
Income tax£5,971.07
Class 4 NI£1,765.80
Student loan£0.00
Total deductions£7,736.87
Net income£34,263.13

Income tax by band

Band Rate Taxable amount Tax
Starter rate 19.0% £3,967.00 £753.73
Basic rate 20.0% £12,989.00 £2,597.80
Intermediate rate 21.0% £12,474.00 £2,619.54
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% £29,430.00 £1,765.80
Above £50,270 2.0% £0.00 £0.00