What does the national insurance calculator do?
It routes a specific salary question into PayBreakdown's calculator so gross pay, take-home pay, tax, National Insurance, pension, student loan, region, and tax-code assumptions can be adjusted.
PayBreakdown - Salary Calculator & Budget Manager
National Insurance calculator
Estimate employee National Insurance contributions from salary or hourly pay and view the wider take-home pay impact.
What this page helps with
National Insurance is commonly searched on its own, especially when checking payslips. This page gives NI its own landing intent while keeping the overall salary breakdown nearby.
Official sources
Income Tax rates and Personal AllowancesNational Insurance rates and categoriesStudent loan repayment thresholdsPension tax reliefNational Minimum Wage and National Living Wage ratesStatutory Maternity Pay and LeaveStatutory Sick PayFCA guidance on misleading financial promotionsOff-payroll working and IR35 guidanceUnderstanding off-payroll workingSalary sacrifice for employersNHS Employers pay scales 2026/27NHS Health Careers Agenda for Change pay ratesFrequently asked questions
Can I change the assumptions?
Yes. Open the calculator from this page to change salary, hours, pension, student loan, tax year, region, tax code, bonus, and other pay settings.
Last updated 2026-05-07. Planning estimates only. Not financial advice.