National Insurance (NI) is a fundamental part of the UK tax system. Contributions build entitlement to certain state benefits and help fund public services. Both employees and employers pay NI, with rates varying based on earnings and employment status.
Contribution Classes
Class 1 contributions apply to employees, split between employee and employer portions. Class 2 and Class 4 apply to self-employed individuals. Class 3 allows voluntary contributions to fill gaps in NI records. Each class has different rates and thresholds.
Employee and Employer Rates
Employees pay NI on earnings above the Primary Threshold. Employers pay on earnings above the Secondary Threshold. The rates change periodically with government budgets. Higher earners pay a reduced rate on earnings above the Upper Earnings Limit.
NI and State Benefits
Your NI record affects eligibility for State Pension, contribution-based Jobseeker's Allowance, Employment and Support Allowance, Maternity Allowance, and Bereavement Support Payment. You typically need 35 qualifying years of contributions for a full State Pension.