Last updated: 29 July 2026 · Sourced from official UK government publications
Plain-English explainer, covering the 2026/27 tax year (6 April 2026 to 5 April 2027). All figures drawn from HMRC and gov.uk. Not financial advice. See disclaimer below.
National Insurance contributions fund three things: the State Pension, the NHS, and a set of contributory benefits like Jobseeker’s Allowance and Maternity Allowance. Money goes into the National Insurance Fund and is used to pay today’s claimants, not saved in a personal pot. Below is how it actually breaks down.
By statute, NI contributions are routed to the National Insurance Fund. The Fund pays out three categories:
Anything left in the National Insurance Fund at the end of the year is held as a working balance, not transferred to the general Treasury budget.
Recent figures published by HM Treasury and the Office for Budget Responsibility show roughly this split per pound of NI collected:
| Where it goes | Approximate share |
|---|---|
| State Pension | around 55-60% |
| NHS contribution | around 20-25% |
| Contributory benefits (JSA, ESA, Maternity, Bereavement) | around 10-15% |
| Administration and other | around 2-5% |
Exact percentages move year to year as State Pension uprating, NHS funding deals, and benefit caseloads change. Up-to-date figures are published in the annual Government Actuary’s Department report on the National Insurance Fund.
NI and income tax look similar on a payslip but they are different taxes:
Together, the two taxes mean a basic-rate worker faces a marginal rate of 28% (20% income tax + 8% NI) on each extra pound earned in the basic-rate band.
Not in the sense of a personal account that pays you back. Every tax year you earn or are credited with NI counts as a ‘qualifying year’. You need:
If you take a career break, you may still get NI credits while claiming benefits, on parental leave, or caring for a relative. Voluntary Class 3 contributions can fill gaps for some years if you would otherwise fall short of the 35-year mark. The State Pension forecast tool at gov.uk/check-state-pension shows your record and what you are projected to receive.
It is also worth being clear about scale. Even the full new State Pension is £12,547.60 a year over 52 weeks, which is why most people end up combining it with a workplace or private pension. NI buys you the floor, not the whole retirement.
For employees in 2026/27:
The main rate dropped from 12% to 10% in January 2024 and from 10% to 8% in April 2024. Self-employed Class 4 NI is 6% between £12,570 and £50,270, then 2% above. Class 2 self-employed contributions were abolished in April 2024.
Almost nothing moved for 2026/27. Employee rates and thresholds are frozen, employers still pay 15% on earnings above £5,000, and the only Class 1 change was the Lower Earnings Limit rising from £6,500 to £6,708 a year (£125 to £129 a week). That limit decides whether a low-paid year counts on your NI record, not how much you pay. On the self-employed side, the Class 2 Small Profits Threshold rose from £6,845 to £7,105 and the voluntary Class 2 rate went from £3.50 to £3.65 a week. Our full National Insurance guide works through the calculation on real salaries.
The take-home pay calculator shows the NI deducted on any salary alongside income tax and pension contributions.
For UK 18 to 25 year-olds entering the workforce, NI looks like another tax that disappears off the payslip. The practical reason it matters:
Checking your NI record annually at gov.uk takes about two minutes and is the single best way to spot gaps early.
The other half of the picture is what that money will actually buy by the time you get there. The State Pension rises each April under the triple lock, which is meant to keep pace with prices or wages, so it helps to understand how inflation erodes fixed sums over a working life. Anything you save on top, whether in an ISA or a pension, sits outside the NI system entirely.
NI rates, thresholds, and credit rules change at every Budget. Kvanta covers every announcement in plain English.
Subscribe free →The State Pension, the NHS, and contributory benefits (JSA, ESA, Maternity Allowance, Bereavement Support Payment). Money flows through the National Insurance Fund.
No. NI applies to earned income only and is hypothecated to social security and the NHS. Income tax applies to nearly all income and goes to general spending.
Indirectly. Each qualifying year builds State Pension entitlement. 35 years for the full pension, 10 for any pension at all.
Employee: 8% from £12,570 to £50,270, then 2%. Employers: 15% above £5,000. Self-employed Class 4: 6% then 2%. Compulsory Class 2 is gone, with the Small Profits Threshold at £7,105 and voluntary Class 2 at £3.65 a week.
£241.30 a week, which is £12,547.60 over 52 weeks. It rose 4.8% in April 2026 under the triple lock. You need 35 qualifying NI years for the full amount and at least 10 for any State Pension at all.