Salary Sacrifice Explained: Pension, Tax and National Insurance Savings (2026/27)

The short answer

Salary sacrifice means agreeing with your employer to give up part of your salary in return for a non-cash benefit — usually an extra employer pension contribution, but sometimes an electric car, a bike or childcare-related benefits. Because your contractual salary is lower, you pay less Income Tax and less National Insurance, and your employer pays less employer National Insurance too.

Compared with paying the same amount into a pension in the ordinary way, salary sacrifice saves your employee National Insurance: 8% for most earners and 2% on earnings above £50,270 in 2026/27. Use the UK salary calculator to see your take-home pay at your new, lower salary.

The three ways to pay into a workplace pension

Method	Income Tax relief	National Insurance saving	How it appears on your payslip
Relief at source	Basic rate added by the provider; higher and additional rate claimed through Self Assessment	None	Contribution taken from pay after tax
Net pay arrangement	Full relief at your marginal rate, automatically	None	Contribution taken before tax
Salary sacrifice	Full relief at your marginal rate, automatically	Yes — employee NI on the amount sacrificed	Lower gross salary; employer pays the contribution

Worked example: £40,000 and a £2,000 pension contribution

	Net pay / relief at source	Salary sacrifice
Salary used for Income Tax	£38,000	£38,000
Salary used for National Insurance	£40,000	£38,000
Pension contribution	£2,000	£2,000
Take-home pay	£30,720	£30,880
Cost of the £2,000 contribution	£1,600	£1,440

Both routes give 20% Income Tax relief (£400). Salary sacrifice also avoids 8% National Insurance on £2,000 — £160 a year — so the same £2,000 in the pension costs £1,440 instead of £1,600. Many employers also pass some or all of their own 15% employer National Insurance saving into your pension, which can add up to another £300.

Higher earners

At £60,000, sacrificing 10% (£6,000) brings your salary to £54,000. Every pound of that £6,000 would have been taxed at 40% plus 2% National Insurance, so take-home pay falls from £45,357 to £41,877 — the £6,000 pension contribution costs £3,480.

At £110,000, the Personal Allowance taper makes the effect much larger: sacrificing £10,000 to bring your salary back to £100,000 restores £5,000 of Personal Allowance, so the £10,000 contribution reduces take-home pay by only £3,800 — an effective 62% relief. Our UK tax bands guide explains the 60% band in detail.

Because adjusted net income falls, salary sacrifice can also reduce or remove the High Income Child Benefit Charge (which starts at £60,000) and help parents keep tax-free childcare and free childcare hours, which are lost if either parent's adjusted net income exceeds £100,000.

Student loans

Student loan repayments are calculated on your pay after the sacrifice, so they fall by 9% of the amount sacrificed (6% more with a Postgraduate Loan) when you earn above your plan's threshold. For a Plan 2 borrower on £40,000 sacrificing £2,000, repayments fall from £955 to £775 a year. Use the student loan repayment calculator to see the effect on your plan.

The change coming in April 2029

At the Autumn Budget 2025 the government announced that from April 2029 the National Insurance exemption for pension contributions made through salary sacrifice will be capped at £2,000 a year. Contributions above that will attract employee and employer National Insurance as if they were paid as salary. Income Tax relief is not affected, and pension contributions paid directly by your employer (not funded by a sacrifice) remain free of National Insurance.

Until then the full saving applies. After April 2029, salary sacrifice will still be the most efficient route for the first £2,000 a year, and still gives full Income Tax relief on the rest.

Things to check before you sign

• Minimum wage: your cash pay after the sacrifice cannot fall below the National Minimum Wage or National Living Wage.
• Statutory pay: statutory maternity, paternity and sick pay are based on your actual earnings, so a large sacrifice can reduce them. Some employers keep the sacrifice going during leave or use your pre-sacrifice salary.
• Mortgages and loans: lenders may use your lower salary when assessing affordability; ask your employer for a letter showing your pre-sacrifice salary.
• Life cover and pay rises: check whether death-in-service benefits and future pay rises are based on your pre-sacrifice salary.
• Changing it: most schemes only let you change the amount once a year or after a life event.

How it looks on your payslip

With salary sacrifice your payslip usually shows a lower gross pay line — or your normal salary with a "salary sacrifice" deduction above the tax calculation — and no employee pension deduction, because the whole contribution is now paid by your employer. Your pension statement shows it as an employer contribution. Income Tax and National Insurance are both worked out on the reduced figure, which is why both are lower than before. If your payslip still shows a pension deduction after tax and National Insurance have been calculated, you are on relief at source or a net pay arrangement, not salary sacrifice.

Higher-rate taxpayers on relief at source

If your workplace scheme uses relief at source, the pension provider only adds basic-rate relief (20%). Higher-rate and additional-rate taxpayers must claim the extra 20% or 25% themselves, through a Self Assessment return or by contacting HMRC. Many people never do, and lose hundreds or thousands of pounds a year. Salary sacrifice and net pay arrangements give full relief automatically, so the issue does not arise.

The annual allowance

Total pension contributions from you and your employer, plus tax relief, are normally limited to the annual allowance of £60,000 a year (or 100% of your earnings, if lower). Unused allowance from the previous three tax years can usually be carried forward. For people with very high incomes — adjusted income above £260,000 — the allowance tapers down, to a minimum of £10,000. Most people never get near these limits, but large salary sacrifices from a bonus can, so check before sacrificing a big lump sum.

Salary sacrifice and the State Pension

Your National Insurance record decides your State Pension, so it is natural to worry that paying less National Insurance will cost you entitlement. In practice it does not, as long as your earnings after the sacrifice stay above the Lower Earnings Limit for National Insurance (around £6,500 a year): you still get a qualifying year, because qualifying years depend on earnings passing that limit rather than on how much National Insurance you actually pay. Only very large sacrifices by part-time or low-paid workers could affect it, and in those cases the minimum wage rule usually stops the sacrifice first.

Bonus sacrifice

Many employers let you sacrifice part or all of a bonus into your pension. The saving is the same as for salary — Income Tax and National Insurance on the amount sacrificed — and it can be especially valuable when a bonus would push you into the higher-rate band or into the £100,000–£125,140 range where the Personal Allowance is withdrawn. A £10,000 bonus taken as cash by someone earning £100,000 leaves about £3,800 after tax and National Insurance; sacrificed into a pension, all £10,000 is invested. Check the deadline: the sacrifice usually has to be agreed before the bonus is paid or even awarded.

Should you do it?

For most employees in a workplace pension, salary sacrifice is the cheapest way to save for retirement: the same contribution costs less, and some employers top it up with their National Insurance saving. The main reasons to hold back are a near-term mortgage application, an upcoming period of statutory parental pay, or a salary close to the minimum wage. Remember that pension money is normally locked away until age 57 from 2028, so keep enough accessible savings for emergencies first.

Other salary sacrifice benefits

Pension contributions are the most common, but employers also offer salary sacrifice for electric company cars (with a low benefit-in-kind rate), the cycle to work scheme, and in some cases technology or extra holiday. Most other benefits lost their tax advantage in 2017, so outside pensions, cycles and ultra-low-emission cars, salary sacrifice usually only saves National Insurance on the price — or nothing at all.

Checklist

• Ask whether your employer offers pension salary sacrifice and whether it shares its employer National Insurance saving.
• Calculate take-home pay at the lower salary with the UK salary calculator.
• If you earn £60,000–£125,140, check how much sacrifice would protect Child Benefit, childcare support or your Personal Allowance.
• Check the effect on statutory pay and mortgage applications before a big sacrifice.
• Plan for the £2,000 National Insurance cap from April 2029.