⚡ Quick Answer
National Insurance (NI) is a tax paid by employees, employers, and the self-employed that funds state benefits including the State Pension, NHS, and employment support. Employees pay 8% NI on earnings from £12,570 to £50,270, and 2% above. Employers pay 15% on employee earnings above £5,000. Self-employed pay Class 2 (£3.65/week) and Class 4 (9% on profits £12,570-£50,270, 2% above). Your NI record determines your entitlement to the full State Pension — you need 35 qualifying years.
National Insurance is often described as a separate tax from income tax — and while it’s collected differently, it functions in practice as additional earnings taxation. What distinguishes it is the entitlement dimension: NI contributions build your record for the State Pension and certain other benefits. Understanding how much you pay and what it buys you is essential for financial planning.
Why NI Matters Beyond Just Tax
Your National Insurance record determines entitlement to:
- New State Pension — you need 35 qualifying years for the full pension (currently £241.30/week in 2026/27)
- New-Style Jobseeker’s Allowance
- New-Style Employment and Support Allowance
- Statutory Sick Pay, Maternity/Paternity/Adoption Pay (employer NI funds these indirectly)
Each year you pay (or receive NI credits) counts as a qualifying year. You can check your NI record and State Pension forecast at gov.uk/check-national-insurance-record.
Employee NI Rates 2026/27
- No NI on earnings up to £12,570 (Primary Threshold — aligned with Personal Allowance since 2022)
- 8% on earnings from £12,570 to £50,270
- 2% on earnings above £50,270
These rates were reduced from 12% and 2% to 10% and 2% in January 2024, then further reduced to 8% from April 2024 — a significant reduction for most employees.
Employer NI
Employers pay 15% NI on each employee’s earnings above £5,000 per year (for 2026/27). The threshold was reduced from £9,100 in April 2026 following the Autumn 2024 Budget — significantly increasing employers’ NI costs and a key driver of employment cost discussions for UK businesses.
Self-Employed NI
- Class 2 NI: £3.65/week for 2026/27. Paid through Self Assessment. Counts toward State Pension qualification.
- Class 4 NI: 9% on profits between £12,570 and £50,270; 2% on profits above £50,270. Also through Self Assessment.
Filling Gaps in Your NI Record
If you have gaps in your NI record — from career breaks, time abroad, or low-income periods — you can make voluntary Class 3 contributions to fill them. The cost is £17.45/week (2026/27). Given the State Pension value (currently £241.30/week × 52 = £12,547/year), filling gaps is often excellent value — typically paying for itself within the first year or two of receiving the pension.
For how NI connects to your State Pension and retirement planning, our guide on how much to save for retirement covers the full picture.
Frequently Asked Questions
Do NI contributions buy me retirement income directly?
Not directly — NI contributions don’t go into a personal fund. They fund current State Pension payments (pay-as-you-go system) and build your entitlement record. Your eventual State Pension is determined by your qualifying years, not the total amount you’ve contributed.
Can I avoid paying NI legally?
NI is mandatory on qualifying earnings. Salary sacrifice pension contributions reduce NI for both employee and employer — one legitimate way to reduce total NI liability while saving more for retirement.
Official NI guidance is at gov.uk/national-insurance.
