Self-Employment Tax Calculator 2025/26
Calculate your total self-employment tax liability including Income Tax and National Insurance contributions (Class 2 & Class 4).
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Disclaimer
This calculator provides estimates for self-employed individuals. It assumes all income is from self-employment. For mixed income sources or complex situations, consult a qualified accountant.
National Insurance Rates 2025/26
Class 2 NI (if profits > £12,570)£3.50/week
Class 4 NI Main Rate6% (£12,570.00 - £50,270.00)
Class 4 NI Additional Rate2% (over £50,270.00)
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