National Insurance Explained 2026/27
NI is the second-biggest deduction on your payslip after Income Tax. Here's exactly how it's calculated, what it pays for, how it builds your State Pension, and how to legally cut your bill.
2026/27 Class 1 NI Rates for Employees
Most employees fall into NI Category A. Your NI is calculated weekly or monthly on your actual earnings — not annually like Income Tax. The three bands work like this:
| Earnings band (annual) | Monthly equivalent | Employee NI rate |
|---|---|---|
| £0 – £12,570 | £0 – £1,048/month | 0% |
| £12,570 – £50,270 | £1,048 – £4,189/month | 8% |
| Above £50,270 | Above £4,189/month | 2% |
Quick example: On a £40,000 salary you pay NI on £40,000 − £12,570 = £27,430. At 8%, that's £2,194/year in employee NI — about £183/month.
What does National Insurance pay for?
NI contributions go into the National Insurance Fund, which is separate from general taxation. The fund primarily pays for the State Pension, Jobseeker's Allowance, Employment and Support Allowance, and Maternity Allowance. A portion is also allocated to the NHS.
Unlike Income Tax — which goes into a general pot — your NI record is linked specifically to you and your National Insurance number. This is why paying NI matters for your future: each year you contribute (or receive NI credits) counts as a qualifying year towards your State Pension entitlement.
State Pension
The biggest beneficiary of NI contributions
Maternity Allowance
For those who don't qualify for SMP
NHS funding
A portion funds healthcare
Jobseeker's Allowance
Contribution-based JSA
How NI builds your State Pension
Every year you pay NI (or receive NI credits, e.g. during parental leave or periods of unemployment) counts as a qualifying year. Your State Pension entitlement depends entirely on how many qualifying years you have.
For the new State Pension (which applies to anyone reaching State Pension age after April 6, 2016), the rules are:
35
Qualifying years needed
for full new State Pension
10
Minimum qualifying years
to receive any State Pension
£221.20
Full new State Pension
per week in 2026/27 (£11,502/yr)
Gaps in your record? You can check your NI record and State Pension forecast at gov.uk/check-state-pension. If you have gaps, you may be able to pay voluntary Class 3 NI contributions (£17.45/week in 2026/27) to fill them.
NI Categories — the letter on your payslip
The NI category letter on your payslip tells your employer which rate to apply. Check your payslip now — most employees should be on Category A. If you see a different letter, here's what it means:
| Letter | Who it applies to | Employee NI | Employer NI |
|---|---|---|---|
| A | Standard employees (most people) | 8% / 2% | 15% |
| B | Married women with reduced rate election (pre-1977 only) | ~3.85% / 2% | 15% |
| C | Employees over State Pension age | 0% | 15% |
| H | Apprentices under 25 | 8% / 2% | 0% |
| J | Employees deferring NI (multiple jobs) | 2% only | 15% |
| M | Employees under 21 | 8% / 2% | 0% |
| V | Veterans in first year of civilian employment | 8% / 2% | 0% |
| Z | Under 21 employees deferring NI | 2% only | 0% |
How to legally reduce your NI bill
Because NI is calculated on your gross pay, any arrangement that reduces your gross salary will also reduce your NI. The most effective legal strategies are:
1. Salary Sacrifice Pension
The most powerful NI saver. Each £1,000 sacrificed into your pension reduces NI by £80 (basic rate) on top of £200 income tax relief. Your employer saves 15% employer NI too, and some pass this saving back to you as extra pension contributions.
2. Cycle to Work Scheme
Salary sacrifice for a bike and equipment saves both income tax and NI on the sacrificed amount. For a basic rate taxpayer, a £1,000 bike costs just £720 after tax and NI savings.
Check your full take-home pay
Make sure your monthly budget adds up. Use our comprehensive payslip calculator to see exactly how much you will take home after tax, pension, and student loan deductions.