What is Salary Sacrifice?
Salary sacrifice is swapping part of your gross pay for a non-cash benefit — usually pension contributions, an electric car or childcare — so both you and your employer pay less National Insurance on it.
How it works
You agree a lower contractual salary; your employer pays the difference into (say) your pension. Because the sacrificed amount never counts as pay, you save income tax and 8% NI on it, and your employer saves 15% employer NI — which good employers partly share back. A £2,000 pension sacrifice costs a basic-rate worker roughly £1,440 of take-home; the same £2,000 paid from net salary would cost the full £2,000 minus relief claimed later.
The catches — including the new cap
A lower headline salary can shrink mortgage borrowing capacity, statutory maternity pay and life-insurance multiples; you can't sacrifice below the minimum wage. EV schemes lock you into multi-year leases. And the big one: the November 2025 Budget confirmed the NI break will be capped at £2,000 of sacrificed pension contributions a year from April 2029 — above that, sacrificed amounts face employee and employer NI like ordinary contributions. The window for unlimited NI-free sacrifice is now closing on a known date.
Why it matters now
Salary sacrifice is the legal escape hatch from the very taxes politics keeps raising: it shelters pay from the frozen thresholds driving fiscal drag, restores child benefit lost to the £60,000 clawback, and defuses the 60% trap above £100,000. If the Greens' full-rate NI above £50,270 happened, sacrifice would get 6p per £1 more valuable overnight — which is exactly why any chancellor eyeing NI rises eyes this relief too.
Plain-English guide for general information only — not financial, legal or tax advice. Rates are 2026/27 unless stated. Last reviewed 5 July 2026.
Frequently asked questions
Is salary sacrifice worth it?
For pension contributions it's usually the most tax-efficient saving mechanism in the UK — saving 28% (basic rate) to 47%+ (higher earners) on every pound, more if your employer shares their NI saving. The trade-offs are a lower headline salary for borrowing and statutory pay purposes.
Does salary sacrifice reduce National Insurance?
Yes — that's its whole advantage over ordinary pension contributions: the sacrificed pay escapes your 8% NI and your employer's 15%, on top of income-tax relief. From April 2029 this NI exemption is capped at £2,000 of pension sacrifice a year.
Can salary sacrifice restore my child benefit?
Often, yes. The £60,000–£80,000 clawback uses adjusted net income, which sacrifice reduces — a parent on £65,000 sacrificing £5,000 into their pension keeps their full child benefit and gets pension savings at a startling effective rate.