National Insurance Calculator 2025/26
Calculate your National Insurance contributions including Class 2 and Class 4 for self-employed individuals.
Enter Your Self-Employment Profit
Enter your self-employment profit (income minus allowable expenses)
About Self-Employed NI
Self-employed individuals pay Class 2 NI (flat rate) and Class 4 NI (profit-based). Class 2 contributes to your State Pension entitlement.
NI Rates 2025/26
Class 2 (if profits > £12,570)£3.50/week
Class 4 Main Rate (£12,570 - £50,270)6%
Class 4 Additional Rate (over £50,270)2%
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