National Insurance explained
What National Insurance actually pays for, how the employee rates work for 2026/27, and how it differs from Income Tax.
Written by Jack Dev · Last updated 2 October 2026
What NI is for
Income Tax pays for pretty much everything — roads, schools, the NHS, general government spending. National Insurance is different: it's specifically building your entitlement to the State Pension, plus a few contributory benefits like Jobseeker's Allowance. You need roughly 35 qualifying years to get the full new State Pension, and NI is how those years get counted.
What shows up on your payslip is Class 1 NI, deducted automatically by your employer. There's also a separate employer contribution running alongside it that never touches your pay at all — don't go looking for it on your payslip, because it isn't there.
The 2026/27 rates
The actual numbers: 8% on everything you earn between £12,570 and £50,270, then 2% on anything above that, with no ceiling on the 2% band — it just keeps going. Below £12,570, you pay nothing at all. And unlike Income Tax, there's no taper above £100,000 to worry about here; the 2% rate simply carries on regardless of how much you earn.
NI is worked out on your gross earnings, full stop — not your taxable income. So a standard pension contribution that knocks down your Income Tax bill does absolutely nothing to your NI bill. Only salary sacrifice, which genuinely lowers your contractual pay, touches the NI side too.
How NI differs from Income Tax in practice
Here's a quirk worth knowing: once you cross £50,270, your NI rate actually drops (8% to 2%), even as your Income Tax rate climbs (20% to 40%). The two taxes pull in opposite directions right at that threshold — part of why total deductions don't rise quite as steeply as the headline 40% rate alone would suggest.
Two jobs complicates things slightly, since NI is worked out separately against each job's own threshold — which can mean paying a touch more combined NI than if the same total income came through one employer. HMRC can sometimes arrange deferment if this applies to you.
When NI stops
Reach State Pension age and your employee NI stops dead, even if you're still working full-time. Your employer's contribution carries on regardless, but yours doesn't — genuinely one of the only tax perks that comes with getting older.
Self-employed? Different system entirely — Class 2 and Class 4 NI, charged on profits rather than earnings, with its own thresholds that don't match anything above.
Frequently asked questions
Mainly your entitlement to the State Pension, plus certain contributory benefits like Jobseeker's Allowance — unlike Income Tax, which just funds general government spending.
Only through salary sacrifice, which genuinely lowers your contractual salary. A standard net pay pension contribution cuts your Income Tax but leaves your NI bill untouched.
Yes — employee Class 1 NI stops the moment you reach State Pension age, no matter how much you keep earning after that.
This guide is general information, not financial or tax advice — check GOV.UK or a qualified adviser for anything that affects a real financial decision.