Salary Sacrifice Explained: How It Works & How Much You Save
Complete guide to salary sacrifice in the UK for 2025/26. Understand how salary sacrifice reduces your tax and NI, the benefits available, and how much you could save on pensions, childcare, and more.
Last updated: February 2026
Salary sacrifice is one of the most effective ways to increase your take-home pay without earning more. It works by exchanging part of your gross salary for a non-cash benefit — reducing your income tax and National Insurance in the process. Here's how it works, what benefits you can sacrifice for, and how much you could save.
How Salary Sacrifice Works
In a salary sacrifice arrangement, you agree with your employer to give up a portion of your gross salary in exchange for a benefit. Because your contractual salary is reduced, you pay less income tax and National Insurance on the amount you sacrifice. Your employer also saves on employer NICs.
For example, if you earn £40,000 and sacrifice £5,000 into your pension, your taxable salary becomes £35,000. You save 20% income tax (£1,000) and 8% employee NI (£400) on that £5,000 — a total saving of £1,400. Your employer also saves 13.8% employer NI (£690), which many employers pass on to you as additional pension contributions.
What Benefits Can You Sacrifice For?
HMRC allows salary sacrifice for a limited set of benefits. The most common are:
- Pension contributions — the most popular use. Every £1 sacrificed saves you up to 42p in tax and NI (for higher rate taxpayers in England, or up to 53p in Scotland at the top rate).
- Cycle to Work scheme — save on a bicycle and accessories. Tax and NI free up to £1,000 (some schemes allow more with employer agreement).
- Electric car salary sacrifice — increasingly popular since 2020. The benefit-in-kind rate on electric vehicles is just 2% in 2025/26, making this extremely tax efficient.
- Workplace nursery — if your employer provides or funds a workplace nursery place, this can be provided via salary sacrifice with no taxable benefit.
- Technology schemes — some employers offer home computing equipment through salary sacrifice.
You cannot use salary sacrifice for cash benefits, general purchases, or to reduce your salary below the National Minimum Wage.
Salary Sacrifice for Pensions: The Numbers
Pension salary sacrifice is the most impactful option for most employees. Here's how the savings break down at different salary levels:
| Gross Salary | Sacrifice Amount | Tax Saved | NI Saved | Total Annual Saving |
|---|---|---|---|---|
| £30,000 | £3,000 (10%) | £600 | £240 | £840 |
| £40,000 | £4,000 (10%) | £800 | £320 | £1,120 |
| £50,000 | £5,000 (10%) | £1,000 | £400 | £1,400 |
| £60,000 | £6,000 (10%) | £2,400 | £120 | £2,520 |
| £80,000 | £8,000 (10%) | £3,200 | £160 | £3,360 |
| £105,000 | £10,000 (9.5%) | £6,000* | £200 | £6,200 |
*At £105,000, sacrificing £5,000+ can bring you below the £100,000 personal allowance taper threshold, restoring up to £2,500 of tax-free allowance. This creates an effective marginal saving of 60% on the sacrificed amount.
The £100,000 Trap: Why Salary Sacrifice Is Essential
If you earn between £100,000 and £125,140, your personal allowance is reduced by £1 for every £2 earned above £100,000. This creates an effective marginal tax rate of 60% (or 67.5% in Scotland). Salary sacrifice into your pension is the most effective way to bring your adjusted net income below £100,000 and restore the full £12,570 personal allowance.
For someone earning £110,000, sacrificing £10,000 into their pension would:
- Reduce taxable income to £100,000
- Restore the full £12,570 personal allowance
- Save approximately £6,200 in income tax and NI
- Add £10,000 (plus any employer NI savings) to their pension pot
The net cost to take-home pay is far less than the £10,000 sacrificed — typically around £3,800. This is one of the highest-return financial decisions available to UK earners.
Electric Car Salary Sacrifice
Electric vehicle salary sacrifice has become extremely popular since the benefit-in-kind (BIK) rate for fully electric cars was set at just 2% in 2025/26. This means a £40,000 electric car generates a taxable benefit of only £800 per year — just £160 in tax for a basic rate payer.
The savings compared to buying or leasing privately are substantial. A typical arrangement includes insurance, maintenance, and roadside assistance, with monthly costs often 30-40% lower than an equivalent personal contract hire after tax savings.
Important Considerations
- Salary sacrifice reduces your gross salary — this can affect mortgage applications, statutory maternity/paternity pay (which is based on earnings), and death-in-service benefits linked to salary.
- National Minimum Wage — your post-sacrifice salary cannot fall below the National Minimum Wage. Your employer should check this before agreeing to the arrangement.
- Student loan repayments — salary sacrifice reduces your salary for student loan purposes too, which can reduce your repayments. This is a benefit if you're unlikely to repay in full, but delays repayment if you would otherwise clear the balance.
- Life-changing events — most schemes allow you to opt out if your circumstances change significantly (e.g. redundancy, pregnancy, divorce).
How to Set Up Salary Sacrifice
Salary sacrifice must be arranged through your employer — you cannot set it up yourself. Ask your HR or payroll department what salary sacrifice benefits they offer. Common steps:
- Check what benefits your employer offers through salary sacrifice
- Calculate the savings using our salary calculator — enter your reduced salary to see the impact
- Complete the paperwork with your employer to amend your employment contract
- Your payslip will show the reduced gross salary and the benefit provided
To see exactly how salary sacrifice would affect your take-home pay, use our free salary calculator — enter your current salary, then try it again with the reduced amount after sacrifice. The difference in take-home pay is your true cost.
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