National Insurance is the second deduction on most payslips — and the one people understand least. Employees pay 8% on earnings between £12,570 and £50,270 a year, then 2% on everything above that. Enter your salary to see exactly how much NI you pay per year, month and week, split across both rates. If you pay into a salary-sacrifice pension, add it too — it reduces the pay your NI is worked out on. Results update as you type.
Estimates only — not financial advice. Based on 2026/27 rates for England, Wales & Northern Ireland. Rates may change after the Autumn Budget on 28 October 2026.
See both deductions together in our take-home pay calculator, check your income tax on its own, or read our guide to National Insurance rates 2026/27.