A job offer mentions “pension via salary exchange”, your payslip shows a lower basic salary than you expected, or you’ve read that the rules are changing in 2029. If you’re asking “what is salary sacrifice pension?”, the short version is simple: you swap some of your pay for a bigger employer pension contribution, and both you and your employer save tax or National Insurance as a result. This guide explains how it works, what it looks like on a payslip, the savings at 2026/27 rates, the downsides and what changes from April 2029.
- Salary sacrifice changes your employment contract, so you have to agree to it.
- On a £40,000 salary, sacrificing £2,000 reduces take-home pay by £1,440, not £2,000.
- Lower contractual pay can affect mortgages, statutory pay and some benefits.
- Your cash pay can’t be reduced below the National Minimum Wage.
- Income Tax relief continues after 2029; only the National Insurance saving is capped.
What Is Salary Sacrifice Pension?
Salary sacrifice is a change to your employment contract. You agree to a lower cash salary, and in return your employer pays the amount you’ve given up into your workplace pension as an employer contribution. GOV.UK’s guidance for employers describes it as an agreement to reduce an employee’s cash pay, usually in exchange for a non-cash benefit, and makes clear the employee has to agree to the change.
Because the money never reaches you as salary, no Income Tax or employee National Insurance is due on it. Your employer saves its own National Insurance on that amount as well. Some employers pass part or all of that saving into your pension, which increases the benefit further.
You may see it called salary exchange, SMART pensions or pension exchange. The name changes, but the idea is the same. Pensions are also one of the few benefits employers don’t need to value or report to HMRC under salary sacrifice rules, which keeps things straightforward.
Do all employers offer it?
No. Salary sacrifice is optional for employers, and many smaller businesses don’t offer it. Your employer still has to enrol eligible staff in a workplace pension under auto-enrolment, but it can choose whether contributions are made through salary sacrifice, net pay or relief at source. If you’re not sure which method your scheme uses, check your payslip, your contract or your pension provider’s information.
How It Compares With Other Ways of Paying In
There are three common ways to pay into a workplace pension. Here’s what a £2,000 contribution costs you on a £40,000 salary in 2026/27:
| Method | How tax relief works | Cost to your take-home pay |
|---|---|---|
| Net pay arrangement | Taken from your pay before Income Tax | £1,600 |
| Relief at source | Taken after tax; the pension provider claims 20% basic-rate relief from HMRC | £1,600 |
| Salary sacrifice | Your salary is reduced, so you save Income Tax and National Insurance | £1,440 |
In each case £2,000 goes into your pension. Salary sacrifice costs you less because it also saves £160 of employee National Insurance, and your employer saves £300 of its own.
How a Salary Sacrifice Pension Works on Your Payslip
The clearest answer to “what is salary sacrifice pension?” is on a payslip, so it helps to compare two months side by side. This example uses a £40,000 salary with 5% sacrificed, using 2026/27 rates for England, Wales and Northern Ireland and a standard tax code.
| Payslip line (monthly) | Without salary sacrifice | With 5% salary sacrifice |
|---|---|---|
| Gross pay | £3,333.33 | £3,166.67 |
| Income Tax | £457.17 | £423.83 |
| Employee National Insurance | £182.87 | £169.53 |
| Take-home pay | £2,693.30 | £2,573.30 |
| Employer pension contribution from the sacrifice | £0 | £166.67 |
Take-home pay falls by £120 a month, but £166.67 a month goes into the pension. The difference is the tax and National Insurance you no longer pay.
What to look for on your payslip
- A lower basic pay figure, or a line labelled salary sacrifice, salary exchange or SMART.
- Your employer’s pension contribution, which may appear in a separate section or only on your pension statement.
- No separate employee pension deduction, because the contribution is now paid by your employer.
What Is Salary Sacrifice Pension Worth? 2026/27 Examples
For 2026/27, employees pay National Insurance at 8% on earnings between £12,570 and £50,270 a year and 2% above that, while employers pay 15% above £5,000, according to GOV.UK’s rates and thresholds. Using those rates:
| Salary and amount sacrificed | Income Tax saved | Employee NI saved | Employer NI saved | Take-home falls by |
|---|---|---|---|---|
| £30,000, 5% (£1,500) | £300 | £120 | £225 | £1,080 |
| £40,000, 5% (£2,000) | £400 | £160 | £300 | £1,440 |
| £60,000, 10% (£6,000) | £2,400 | £120 | £900 | £3,480 |
These figures are illustrative, assume a standard tax code and use rates for England, Wales and Northern Ireland. Scottish taxpayers have different Income Tax rates, so their Income Tax saving will differ.
Sacrificing a bonus
Some employers let you sacrifice all or part of a bonus into your pension. For this to work, the arrangement normally has to be agreed before you become entitled to the bonus, because you can’t give up money that is already yours. The savings work in the same way: the sacrificed amount goes into your pension without Income Tax or National Insurance, subject to the minimum wage and the annual allowance. Our bonus tax calculator shows what a bonus is worth if you take it as pay.
Why higher earners save less National Insurance
Above £50,270, employee National Insurance falls to 2%, so a higher-rate taxpayer saves far more in Income Tax than in National Insurance. In the £60,000 example, the Income Tax saving is £2,400 but the employee National Insurance saving is only £120. The employer saving, however, stays at 15% whatever your salary.
Does your employer add any of its National Insurance saving to your pension? Some add all of it, some add part and some keep it. On a £40,000 salary sacrificing £2,000, that’s up to £300 a year extra in your pension.
Pros and Cons
Knowing what is salary sacrifice pension also means knowing its trade-offs. The savings are real, but a lower contractual salary has side effects.
| Possible advantages | Possible drawbacks |
|---|---|
| Saves Income Tax and employee National Insurance | Your contractual salary is lower, which some mortgage lenders use for affordability |
| Your employer saves National Insurance and may share it | Life cover or death-in-service benefits based on salary may be lower |
| Lowers adjusted net income, which can help with the High Income Child Benefit Charge, the £100,000 Personal Allowance taper and Tax-Free Childcare | Statutory pay, such as maternity pay, and earnings-related benefits can be reduced |
| The full amount goes into your pension | Contribution-based benefits can be affected if pay falls below the Lower Earnings Limit |
| Handled automatically through payroll | From April 2029, the National Insurance saving is capped at £2,000 a year |
GOV.UK warns employers that salary sacrifice can reduce or remove entitlement to earnings-related benefits such as Maternity Allowance, and can reduce statutory payments. If average weekly earnings fall below the Lower Earnings Limit, currently £129 a week, some statutory payments may not be due at all.
What about your State Pension?
Your State Pension depends on your National Insurance record. As long as your earnings after the sacrifice stay above the Lower Earnings Limit, the year should still count towards your State Pension, even though you pay less National Insurance. If a large sacrifice took your pay below that limit, the year might not count, which is one reason employers usually prevent it.
The minimum wage floor
Salary sacrifice can’t take your cash pay below the National Minimum Wage or National Living Wage. For workers aged 21 and over, the National Living Wage is £12.71 an hour from April 2026. Employers must check this each pay period, so if your pay is close to the minimum, the amount you can sacrifice may be limited.
Is a Salary Sacrifice Pension Right for You?
Once you understand what is salary sacrifice pension, the next question is whether it suits you. Only you can decide, and for personal advice you should speak to a regulated financial adviser. These questions can help you think it through:
- Is your pay close to the minimum wage or the Lower Earnings Limit? If so, salary sacrifice may be restricted or affect your entitlements.
- Are you applying for a mortgage soon? Check how your lender treats sacrificed salary.
- Are you planning parental leave? Ask how sacrifice affects statutory and enhanced pay.
- Are you a high earner? Salary sacrifice is added back when working out threshold income for the tapered annual allowance; see our guide to the tapered pension allowance.
- Does your employer share its saving? This can make a noticeable difference.
- Do you rely on a salary-linked benefit, such as life cover, that might be calculated on the lower figure?
Questions to ask your employer
- Which pension method does the scheme use, and is salary sacrifice optional?
- Will any of the employer National Insurance saving be added to my pension?
- Which pay figure is used for overtime, pay rises, life cover and enhanced maternity or paternity pay?
- When can I join or leave the arrangement?
- How will the April 2029 cap be handled in payroll?
You can estimate your take-home pay with our pay after tax calculator.
The 2029 Change: The £2,000 National Insurance Cap
From 6 April 2029, only the first £2,000 a year of pension contributions made through salary sacrifice will stay free of National Insurance. Anything above that will attract Class 1 National Insurance for both you and your employer, according to the GOV.UK policy paper. The change was announced at the November 2025 Budget, and the legislation received Royal Assent in April 2026, as Shoosmiths reported.
- Income Tax relief doesn’t change. Your pension contributions still get Income Tax relief as now.
- Your pension isn’t capped. You can still sacrifice more than £2,000; only the National Insurance saving is limited.
- Ordinary employer contributions are unaffected. Contributions your employer makes outside salary sacrifice keep their National Insurance relief.
- Details will follow. HMRC will set out how the limit works in secondary legislation.
The cap doesn’t change the basic answer to “what is salary sacrifice pension?”: it is still a way to turn salary into an employer pension contribution with Income Tax relief. The Government estimates about 7.7 million employees use salary sacrifice for pensions. About 3.3 million sacrifice more than £2,000 and will be affected, with an average extra National Insurance bill of £84 in 2029/30.
£2,000 stays National Insurance-free, and the other £2,000 is above the cap.
- Extra employee National Insurance: £2,000 × 8% = £160 a year
- Extra employer National Insurance: £2,000 × 15% = £300 a year
- Income Tax relief: unchanged
Figures use 2026/27 rates for illustration; rates in 2029/30 may differ.
If you have more than one job
The policy paper doesn’t yet say exactly how the £2,000 limit will apply if you use salary sacrifice with more than one employer. That detail is expected in the secondary legislation, so check the guidance nearer 2029 if this affects you.
For a fuller look at the cap and what employers are doing about it, see our sister site Eternity Accountants’ guide to the salary sacrifice pension.
How to Join, Change or Leave
- Your contract has to change. GOV.UK says each opt-in or opt-out needs a contract change, and you must agree.
- Employers often set windows. Many only allow changes once a year or at set points.
- Lifestyle events may allow a change. GOV.UK gives examples such as marriage, divorce, or a partner being made redundant or becoming pregnant.
- Flexibility has limits. If you can switch between cash and the pension whenever you like, the tax and National Insurance advantages generally won’t apply, as HMRC’s EIM42767 explains.
Myths vs Facts
A survey reported by Trustnet in May 2026 found many workers use salary sacrifice without fully understanding it. These are some common misunderstandings:
| Myth | Fact |
|---|---|
| It doesn’t affect my mortgage. | Some lenders base affordability on your lower contractual salary. |
| It can take my pay below minimum wage. | It can’t; your cash pay must stay at or above the National Minimum Wage. |
| It’s only for pensions. | It can also be used for other benefits, such as cycle-to-work schemes. |
| Salary sacrifice is being abolished in 2029. | Only the National Insurance saving above £2,000 a year is being removed. |
| It reduces what goes into my pension. | The full sacrificed amount goes in, and some employers add more. |
What Is Salary Sacrifice Pension? FAQs
What is salary sacrifice pension in simple terms?
It’s an agreement to take a lower salary in exchange for your employer paying the difference into your pension, which saves you Income Tax and National Insurance.
Does salary sacrifice reduce my take-home pay?
Yes, but by less than the amount sacrificed. On a £40,000 salary, sacrificing £2,000 reduces take-home pay by £1,440 in 2026/27.
Is salary sacrifice better than relief at source?
It usually costs you less because it also saves National Insurance, but the drawbacks, such as effects on mortgages and statutory pay, should be weighed up too.
Does salary sacrifice affect my mortgage?
It can. Some lenders use your lower contractual salary when assessing how much you can borrow.
Can salary sacrifice take me below the minimum wage?
No. Your cash pay must stay at or above the National Minimum Wage or National Living Wage.
Does salary sacrifice affect maternity pay?
It can reduce statutory pay and earnings-related benefits, so check with your employer before parental leave.
What changes in April 2029?
Only the first £2,000 a year of pension salary sacrifice will be free of National Insurance. Income Tax relief is unchanged.
Can I stop salary sacrifice?
Usually only at set times or after a lifestyle event, because each change needs a contract change.
Final Verdict
So, what is salary sacrifice pension? It’s a contract change that turns part of your salary into an employer pension contribution, saving Income Tax and National Insurance along the way. For many employees it puts more into a pension for less cost, but it can affect mortgages, statutory pay and salary-linked benefits, and from April 2029 the National Insurance saving is capped at £2,000 a year. Check your payslip, ask whether your employer shares its saving, and get regulated advice if you’re unsure.
- Check your contract and payslip to see if you already use salary sacrifice.
- Ask your employer whether it passes on its National Insurance saving.
- Think about mortgages, parental leave and salary-linked benefits before changing.
- Speak to a regulated financial adviser for advice on your own situation.