Guide · Retirement & Pensions
Salary Sacrifice Explained: Is It Worth It?
How giving up gross salary before tax is calculated can save you hundreds — or thousands — a year in income tax and National Insurance.
How salary sacrifice works
When you sacrifice salary, your employer reduces your contractual pay by the agreed amount before income tax and National Insurance (NI) are applied. The money goes directly into a pension or other approved benefit. Because you never technically receive the pay, you are never taxed on it.
This is different from making a personal pension contribution, where you pay tax on the income first and then reclaim some of it through the pension tax relief system. With salary sacrifice, you avoid the tax in the first place — and crucially, you also avoid the National Insurance that a personal contribution can't recover.
The key difference
Personal pension contribution: pay income tax, reclaim 20% or 40% via tax relief. NI is still paid.
Salary sacrifice: pay no income tax and no National Insurance on the sacrificed amount.
How much does it actually save?
The saving depends on your tax band. A basic-rate (20%) taxpayer also saves 8% employee NI on the sacrificed amount. A higher-rate (40%) taxpayer saves 40% income tax plus 2% NI. Here is what sacrificing £200/month into a pension saves at different salary levels:
| Salary | Tax band | Tax + NI saved | Net cost to you |
|---|---|---|---|
| £30,000 | Basic rate (20%) | £56/month | £144/month |
| £55,000 | Higher rate (40%) | £84/month | £116/month |
| £70,000 | Higher rate (40%) | £84/month | £116/month |
2026/27 rates. Higher-rate saving is larger in percentage terms because 40% income tax + 2% NI = 42% total relief on the sacrificed amount.
The hidden win: £60,000–£80,000 earners
If your adjusted net income falls between £60,000 and £80,000, you face the High Income Child Benefit Charge — a hidden effective tax rate of up to 50% on income in that band. Salary sacrifice reduces your adjusted net income directly. Sacrifice enough to fall below £60,000 and the charge disappears entirely.
One child, 2026/27. The sacrifice itself also saves income tax and NI on the £5,000 — making the combined saving worth considerably more than the gross amount sacrificed.
When it makes sense — and when it doesn't
Salary sacrifice makes sense for most employees who have an employer scheme available — the NI saving alone justifies it. Be cautious if:
- Your salary would fall below £12,570 (the personal allowance) — you lose the income tax saving because you weren't paying tax on that slice anyway.
- You are applying for a mortgage — some lenders use your contractual salary (after sacrifice) to calculate how much they will lend, which could reduce your offer.
- Your salary would drop below the Lower Earnings Limit — you may lose NI credits that count toward your State Pension.
Frequently asked questions
What is salary sacrifice?
Salary sacrifice is an arrangement where you agree to give up part of your gross salary in exchange for a non-cash benefit — most commonly pension contributions. Because the sacrifice happens before income tax and National Insurance are calculated, both you and your employer pay less.
Does salary sacrifice affect my State Pension?
If your salary after sacrifice falls below the Lower Earnings Limit (£6,396 in 2026/27), you stop building National Insurance credits and your State Pension entitlement can be affected. Above that threshold, there is no impact on your State Pension.
Can salary sacrifice reduce my Child Benefit charge?
Yes. If your adjusted net income is between £60,000 and £80,000, you pay the High Income Child Benefit Charge. Salary sacrifice reduces your adjusted net income, potentially eliminating or reducing the charge — making it extremely valuable in that band.
What else can I sacrifice salary for?
The most common schemes are pension contributions, electric vehicle (EV) leases, cycle-to-work, and childcare vouchers (now closed to new entrants but existing members continue). The tax and NI savings apply to all HMRC-approved schemes.