Salary sacrifice (also called salary exchange) is a formal agreement between you and your employer to reduce your contractual salary in exchange for a non-cash benefit — typically a pension contribution, a bike, or an electric vehicle lease.
Because your salary is reduced before income tax and National Insurance are calculated, you pay less of both. Your employer also pays less Employer's National Insurance. This makes salary sacrifice one of the most tax-efficient arrangements available to UK employees.
It is not a tax avoidance scheme — HMRC approves it and has specific rules governing which benefits qualify.
Here's the key difference from a standard pay arrangement:
| Without salary sacrifice | With salary sacrifice |
|---|---|
| You earn £35,000 | Your contract is amended to £33,000 |
| Tax and NI calculated on £35,000 | Tax and NI calculated on £33,000 |
| You receive the benefit separately and pay for it from net pay | Employer provides £2,000 benefit directly (e.g. pension, bike) |
The formal change to your contract is important — this is what makes it a "sacrifice" rather than a simple payroll deduction. Your employer has to agree to this change, and both parties sign an amended contract or salary sacrifice agreement.
Salary sacrifice looks like a pay cut on paper, but you receive the sacrificed amount as a benefit with value equal to or greater than the tax saving. Most employees are financially better off, not worse off.
This is the critical advantage that makes salary sacrifice more powerful than simply making pension contributions or buying a bike from your own salary. Both you and your employer save National Insurance contributions.
| Who saves | NI rate | Saving on £1,000 sacrifice |
|---|---|---|
| Employee (basic rate) | 8% (on earnings £12,570–£50,270) | £80 |
| Employee (higher rate) | 2% (on earnings above £50,270) | £20 |
| Employer | 13.8% (on earnings above £5,000) | £138 |
Many employers pass some or all of their NI saving back to employees — especially for pension salary sacrifice. Some increase their pension contribution by the full NI saving, which significantly boosts your pot. Always ask your HR department whether they pass on any employer NI savings.
Marcus earns £40,000 and salary sacrifices £200/month (£2,400/year) into his pension.
For detailed calculations of how much salary sacrifice saves in pension contributions specifically, see our Salary Sacrifice Pension guide.
HMRC permits salary sacrifice for a defined list of benefits. The most common are:
The childcare voucher salary sacrifice scheme closed to new entrants in October 2018. If you were already enrolled before that date, you may still be using it. New parents should instead use Tax-Free Childcare (up to £2,000/year per child from the government).
Pension salary sacrifice is by far the most widely offered and most financially significant salary sacrifice scheme in the UK. Your employer processes your pension contribution as an employer contribution rather than an employee deduction — this is what generates the NI saving.
The pension pot receives the same amount either way. The difference is purely how it's treated for tax and NI purposes.
| Scenario | Standard pension contribution | Salary sacrifice |
|---|---|---|
| Gross salary | £40,000 | £38,000 (reduced) |
| Pension contribution | £2,000 from net pay + tax relief | £2,000 as employer contribution |
| Income tax | On £40,000 | On £38,000 (saves £400) |
| Employee NI | On £40,000 | On £38,000 (saves £160) |
| Total saving vs no sacrifice | — | £560/year |
Use our Pension Calculator and Salary Calculator to model the exact impact on your take-home pay and projected pension pot.
The Cycle to Work scheme lets employees buy a bicycle and cycling safety equipment through their employer, repaying the cost via salary sacrifice over typically 12–18 months.
Priya earns £30,000 (basic-rate taxpayer). She wants an £800 road bike.
The scheme is particularly valuable for commuters and can be used for e-bikes, cargo bikes, and accessories like helmets, locks, and lights.
Electric vehicle (EV) salary sacrifice has become one of the most discussed employee benefits since the government set the Benefit-in-Kind (BiK) tax rate for pure electric vehicles at just 2% in 2025/26 and 2026/27.
This makes an EV salary sacrifice arrangement dramatically cheaper than leasing an equivalent petrol or diesel car — even before the income tax and NI savings are factored in.
David earns £55,000 (higher-rate taxpayer). He wants to lease an EV with a list price of £40,000 at £600/month.
Standard lease from net pay:
EV salary sacrifice:
The EV BiK rate rises gradually from 2% to 5% by 2027/28. The scheme remains highly attractive at these rates compared to petrol/diesel alternatives, but factor in rate increases when signing multi-year lease agreements.
Salary sacrifice is not without risks. Before committing, consider:
Some lenders use your contractual salary (not your total package) for affordability calculations. If your contractual salary falls due to salary sacrifice, your maximum borrowing could be reduced. Always speak to a mortgage adviser before entering into a large salary sacrifice arrangement if you're planning to apply for a mortgage.
If your employer provides life assurance or income protection as a multiple of salary, a reduced contractual salary means a lower benefit. Check your policy details and consider topping up independently if needed.
Maternity pay, paternity pay, sick pay and redundancy pay are calculated on your contractual salary. A reduced salary means reduced statutory payments. For employees planning to take parental leave, this is an important consideration.
Salary sacrifice cannot take your pay below the National Living Wage (£12.21/hour in 2026/27 for workers aged 21 and over). Lower-paid employees face limits on how much they can sacrifice.
Some state benefits and tax credits are based on your declared income. Salary sacrifice reduces your declared income, which could affect Universal Credit entitlement. This is rarely a concern for higher earners but worth checking for lower incomes.
Salary sacrifice changes your contractual salary — review all salary-linked benefits, insurances and commitments before signing a new salary sacrifice agreement.
You cannot unilaterally decide to salary sacrifice — it requires a formal agreement with your employer. Here's the process:
If your employer doesn't currently offer a specific scheme and you want to propose one, employers often welcome salary sacrifice as it reduces their NI bill. Share the NI saving calculation — it makes the business case easy.
See exactly how salary sacrifice affects your take-home pay and pension pot growth.
Use the Pension Calculator →