What Is Salary Sacrifice? A UK Guide for Employees and Employers

What Is Salary Sacrifice?

Salary sacrifice is an agreement between you and your employer to give up part of your cash pay in return for a non cash benefit. Your contractual salary goes down. In exchange you get something else, most often a pension contribution, an electric car or a bicycle.

The reason anyone bothers is tax. Income tax and National Insurance are charged on your cash pay. If your cash pay is lower, the tax and National Insurance are lower too. The benefit you receive instead is either tax free or taxed more gently than the salary would have been, so the same amount of money buys you more.

Some employers and pension providers call it salary exchange. It is exactly the same thing. The word sacrifice puts people off, which is presumably why the marketing departments changed it.

It is worth being clear about one thing from the start, because it is the single most common misunderstanding. Salary sacrifice is a real, permanent reduction in your salary, agreed in writing and reflected in your employment contract. It is not a deduction from your payslip. If your payslip still shows the old gross figure and then takes a pension contribution off underneath, that is not salary sacrifice. That is an ordinary employee pension contribution and the National Insurance treatment is completely different.

How Salary Sacrifice Works on Your Payslip

Say you earn £40,000 and you agree to sacrifice £2,000 a year into your pension. From that point your contractual salary is £38,000. Your payslip shows gross pay of £38,000 a year, or £3,166.67 a month. The £2,000 does not appear as a deduction, because it was never your pay in the first place.

Your pension provider receives £2,000, but it arrives as an employer contribution, not an employee one. This matters. It means there is no basic rate relief added at the pension end and nothing to claim back through Self Assessment, because the relief has already happened. You never paid tax on the money.

Your PAYE calculation then runs on the lower figure. Less income tax, less National Insurance, and a smaller employer National Insurance bill for your employer. Everyone except HMRC is better off, which is the whole design.

If you want to check what your take home actually looks like at a given salary, our salary calculator will give you the figure before and after.

What Can Be Sacrificed

In principle almost any non cash benefit can be provided through salary sacrifice. In practice the tax rules narrowed the field sharply in April 2017, and only a handful of arrangements are still worth doing.

The ones that genuinely work in 2026 are:

• Pension contributions. By a distance the most common and the most valuable.
• Ultra low emission and electric cars. Almost always electric, for reasons explained further down.
• Cycles and cycling safety equipment under the cycle to work scheme.
• Workplace nurseries provided or partly financed by the employer.
• Employer provided pensions advice, up to £500 a year.

Things like mobile phones, gym memberships, health screening, company vans and additional annual leave can still technically be offered through sacrifice, but since 2017 they are valued at the higher of the salary given up or the normal benefit in kind value. Because the salary given up is usually the higher figure, the tax saving mostly disappears and you are left with the National Insurance saving alone. Whether that is worth the administration is a judgement call, and for most small employers it is not.

The Numbers: Three Worked Examples

All figures below use 2026/27 rates. Personal allowance £12,570, basic rate 20 percent to £50,270, higher rate 40 percent to £125,140. Employee National Insurance 8 percent between £12,570 and £50,270 and 2 percent above that. Employer National Insurance 15 percent on earnings above £5,000.

A basic rate employee

Sam earns £35,000 and sacrifices 5 percent, so £1,750 a year, into a pension.

• Income tax saved: 20 percent of £1,750 = £350
• Employee National Insurance saved: 8 percent of £1,750 = £140
• Total saved: £490

So £1,750 lands in Sam's pension and take home pay falls by £1,260. Sam's employer also saves 15 percent of £1,750, which is £262.50.

A higher rate employee

Priya earns £60,000 and sacrifices 10 percent, so £6,000 a year.

Her salary drops to £54,000, so the whole £6,000 sits above the upper earnings limit, where employee National Insurance is only 2 percent.

• Income tax saved: 40 percent of £6,000 = £2,400
• Employee National Insurance saved: 2 percent of £6,000 = £120
• Total saved: £2,520

£6,000 goes into the pension and take home falls by £3,480. Her employer saves £900.

An employee in the 60 percent band

This is where salary sacrifice stops being useful and starts being close to essential.

Once your income passes £100,000, your personal allowance is withdrawn at £1 for every £2 of income above that line. Between £100,000 and £125,140 you therefore pay 40 percent on the income itself plus 40 percent on the allowance you are losing, an effective marginal rate of 60 percent. We cover this in more detail in our guide to net income and adjusted net income.

Tom earns £110,000 and sacrifices £10,000. That brings his income back to exactly £100,000 and restores his full personal allowance.

• Income tax saved: 60 percent of £10,000 = £6,000
• Employee National Insurance saved: 2 percent of £10,000 = £200
• Total saved: £6,200

Tom puts £10,000 into his pension and his take home falls by £3,800. His employer saves a further £1,500. We do not know of a better return available to a UK employee on ordinary earnings, and it is the reason the £100,000 to £125,140 band is the first thing we look at when a client's income creeps over the line.

The Point Almost Every Guide Gets Backwards

Read enough articles on this and you will come away thinking salary sacrifice is mainly for high earners. On the National Insurance side, the opposite is true.

Compare salary sacrifice against making an ordinary personal pension contribution, where you pay from taxed income and the provider adds basic rate relief.

Sam, the basic rate employee, could pay £1,400 into a pension personally and the provider would gross it up to £1,750. Net cost: £1,400. Through salary sacrifice the same £1,750 costs £1,260. Salary sacrifice is £140 better.

Priya, the higher rate employee, could pay £4,800 personally, the provider grosses it to £6,000, and she claims a further £1,200 through her tax return. Net cost: £3,600. Through salary sacrifice the same £6,000 costs £3,480. Salary sacrifice is £120 better.

The basic rate employee gains more, in pounds and as a percentage, because the National Insurance saved is 8 percent of the sacrifice rather than 2 percent. Income tax relief is available either way. National Insurance relief is the only thing salary sacrifice actually adds, and National Insurance is the tax that falls hardest on ordinary earnings.

There is a second advantage for higher earners that does not show in the arithmetic. With salary sacrifice the relief is immediate and lands inside the pension. With a personal contribution the higher rate portion comes back to you months later as a tax refund or a tax code adjustment, and most people spend it rather than reinvesting it.

Why Employers Care More Than Employees Do

Employer National Insurance rose to 15 percent from April 2025 and the threshold at which it starts fell to £5,000. That change quietly made salary sacrifice far more valuable to the employer than to the employee.

Look again at Priya. She saved £120 of National Insurance. Her employer saved £900. The employer's saving was seven and a half times larger, and it happened automatically, with no effort on the employer's part beyond running the scheme.

Two practical conclusions follow.

If you are an employee whose workplace does not offer salary sacrifice on pensions, you have a much stronger case for asking than you probably realise. You are not asking your employer for a favour. You are pointing out a cost saving that goes straight to their bottom line.

If you are an employer, the fair thing, and in our experience the thing that gets noticed, is to pass some or all of that National Insurance saving back into the employee's pension. A scheme where the company adds its 15 percent saving on top costs the business nothing compared to the old arrangement and materially improves the outcome for staff. Very few small employers do this, largely because nobody has pointed out that the saving exists.

Salary Sacrifice Cars, and Why They Are Always Electric

Ask why every salary sacrifice car scheme advertises electric vehicles and you will usually get an answer about the environment. The real answer is a specific carve out in the tax rules.

Since April 2017, benefits provided through salary sacrifice are taxed on the higher of the salary given up or the normal benefit in kind value. For a petrol car the salary given up is typically far higher than the benefit in kind figure, so the sacrifice achieves nothing. The rule wipes out the saving deliberately.

Cars with emissions of 75g/km or less are excluded from that rule. For those cars the ordinary benefit in kind value applies, however small it is.

For 2026/27 the appropriate percentage for a fully electric car is 4 percent of list price, rising to 5 percent for 2027/28 and by one point a year after that. A £40,000 electric car therefore produces a taxable benefit of £1,600, on which a higher rate employee pays £640 of tax. The same employee sacrificed perhaps £6,000 of salary to get it, and saved £2,520 of tax and National Insurance in the process. The benefit in kind charge is a fraction of the saving, so the arrangement works.

Run the same numbers on a petrol car and the taxable benefit becomes the £6,000 sacrificed rather than a percentage of list price, and the entire point evaporates. That is the whole explanation. Company car benefits still go on a P11D, and the employer still pays Class 1A National Insurance at 15 percent on the benefit value, so the small print matters.

One caution we give clients regularly: these schemes are usually three or four year leases, and the sacrifice is contractual. If you leave the job, are made redundant, or go on long term sick leave, you may face an early termination charge that is not small. Read the exit terms before the marketing brochure.

Cycle to Work and the Other Exempt Benefits

Five benefits sit entirely outside the 2017 rules and are taxed as though salary sacrifice had never happened:

1. Pension contributions to a registered pension scheme
2. Employer provided pensions advice
3. Workplace nurseries
4. Childcare vouchers and employer provided childcare, but only for arrangements that started before 4 October 2018
5. Cycles and cyclists' safety equipment

Cycle to work is the quietly good one. The bicycle attracts no benefit in kind at all provided it is available to all employees and mainly used for commuting. A higher rate taxpayer sacrificing £1,500 for a bike gives up £870 of take home pay, and there is no tax charge on the benefit. The old £1,000 limit no longer applies where the employer uses an FCA authorised scheme provider, which is most of them.

Childcare vouchers closed to new joiners in October 2018 and were replaced by Tax Free Childcare, which is not a salary sacrifice arrangement. If you were already in a voucher scheme before that date you can usually stay in it, and for some families that is still the better deal, so do not give it up without running both.

The £2,000 Cap Arriving in April 2029

At the Autumn Budget on 26 November 2025, the government announced that the National Insurance exemption on salary sacrificed pension contributions will be capped at £2,000 a year from 6 April 2029. Anything sacrificed above that will be treated as an ordinary employee pension contribution and will attract both employee and employer National Insurance.

Three things are worth saying about this, because the coverage at the time was noisier than the measure deserves.

Income tax relief is untouched. Only the National Insurance exemption is capped. The 40 percent and 60 percent relief that makes salary sacrifice worthwhile for higher earners carries on exactly as now. So does the ability to use pension contributions to manage adjusted net income for the personal allowance taper or the High Income Child Benefit Charge.

Most employees will not notice. Sam, sacrificing £1,750, is below the cap and unaffected. So is anyone on a typical auto enrolment contribution at an ordinary salary. The cap bites on larger contributions, which in practice means higher earners and people making serious catch up contributions late in their careers.

The employer takes most of the hit. Take Priya's £6,000 sacrifice. The excess over the cap is £4,000. Because her reduced salary sits above the upper earnings limit, her extra National Insurance is 2 percent of £4,000, so £80 a year. Her employer's extra cost is 15 percent of £4,000, so £600. That is seven and a half times as much, mirroring the imbalance in the savings. For a basic rate employee the split is less extreme, because their marginal National Insurance is 8 percent rather than 2 percent, but the employer still pays the larger share.

Our reading is that this is an employer tax dressed as a pensions measure, and the practical risk is not that employees stop sacrificing but that employers quietly stop offering enhanced schemes. If you are an employer, 2029 is not far away when your car scheme runs on four year leases and your payroll software needs rewriting. If you are an employee, the honest advice is to carry on and revisit it in 2028.

The Traps Nobody Mentions Until Afterwards

Salary sacrifice reduces your official salary, and quite a few things in British life are calculated from your official salary.

The minimum wage floor. Sacrifice cannot take your cash pay below the National Minimum Wage. From April 2026 the National Living Wage is £12.71 an hour for those aged 21 and over. A full time employee on 37.5 hours a week works 1,950 hours a year, which puts the minimum at £24,784.50. Someone on a £25,000 salary can therefore sacrifice roughly £215 a year and no more. This is why lower paid employees are frequently excluded from schemes altogether, and it is a check the employer has to run for every individual, every time pay or hours change.

Statutory pay. Statutory maternity, paternity and sick pay are worked out from average weekly earnings, and average weekly earnings means your post sacrifice pay. Statutory Maternity Pay is 90 percent of average weekly earnings for the first six weeks, so sacrificing heavily during the qualifying period directly reduces it. Worse, if your reduced pay falls below the lower earnings limit of £129 a week for 2026/27, you can lose entitlement to statutory payments completely. Anyone planning a family should pause the sacrifice well before the relevant reference period, not after.

There is a corresponding point in the employee's favour. During maternity leave the employer must keep providing the non cash benefit at its own cost, so pension contributions continue even when pay does not. That is a genuine advantage of sacrifice over a personal contribution.

Mortgages. Lenders assess affordability on gross salary, and your gross salary is now the reduced figure. Some lenders will add back pension sacrifice if you ask and provide evidence. Many will not. If you are applying for a mortgage in the next year, talk to a broker before you increase a sacrifice, because unwinding it afterwards is not always possible.

Borrowing, benefits and credit. The same reduced figure appears on any reference, and it feeds into means tested benefit calculations. Universal Credit is based on net earnings, so sacrifice can actually increase entitlement, which is occasionally useful and rarely mentioned.

You cannot change your mind whenever you like. Because it is a contractual variation, you cannot switch back and forth at will. HMRC permits changes on a genuine lifestyle event, marriage, divorce, redundancy, pregnancy, a partner's job loss and similar. Routine annual swapping between cash and benefit will lead HMRC to treat the arrangement as ineffective, and the tax becomes payable as though the sacrifice never happened.

If You Run Your Own Limited Company, You Probably Do Not Need It

This is the section we end up giving verbally to owner managed company clients almost every month, and we have not seen it written down anywhere else.

Salary sacrifice exists to solve a problem that a director of their own company does not have. It converts employee pay into an employer contribution because the employee cannot make an employer contribution on their own behalf. If you own the company, you can simply instruct the company to make the pension contribution directly.

A direct employer pension contribution is deductible against corporation tax provided it meets the wholly and exclusively test, carries no employee or employer National Insurance, and requires no contract variation, no minimum wage test and no payroll configuration. It reaches the same destination as salary sacrifice by a shorter road. For most owner managers taking a small salary and the balance in dividends, it is also more tax efficient, because the salary you would be sacrificing is small to begin with. Our guide to director's remuneration covers how the salary and dividend split usually gets set.

There is a further point looking ahead. The April 2029 cap is aimed specifically at salary sacrificed pension contributions. On the information published so far, a straightforward employer contribution made outside any sacrifice arrangement is not caught. We would not build a long term plan on that alone, because the draft legislation is not final and the government is plainly willing to revisit this area. But it is one more reason for company directors to take the direct route rather than construct a sacrifice arrangement they do not need.

Salary sacrifice remains the right answer for your employees. It is usually the wrong answer for you, if you own the business.

Setting a Scheme Up as an Employer

If you are the employer, the arrangement only works if it is documented properly. HMRC does not approve schemes in advance and will not give a ruling, so the burden of getting it right sits with you.

The essentials are:

• Vary the contract in writing before the sacrifice starts. It cannot be applied to pay already earned. Retrospective sacrifice does not work.
• Set out what happens on the exits. Leaving employment, unpaid leave, statutory leave, and the lifestyle events that allow a change.
• Run the minimum wage test for every affected employee, and rerun it whenever hours or rates change.
• Check auto enrolment. Employees must be able to opt out of sacrifice while staying in the pension, so you need a fallback arrangement, and qualifying earnings should normally be based on pre sacrifice pay.
• Configure payroll correctly, so the reduction shows as a lower gross rather than a deduction, and the contribution is flagged as an employer contribution.
• Decide whether to share the National Insurance saving. You do not have to. We think you should, and it is far cheaper as a retention measure than a pay rise.

Get the paperwork wrong and HMRC's position is simple. The sacrifice was ineffective, the original salary was always taxable, and the PAYE and National Insurance are due with interest. That is a payroll problem, not a pensions problem, which is why it usually lands on the accountant's desk.

Our View

Salary sacrifice on pensions is one of the few remaining arrangements in the UK tax system that is genuinely worth doing for nearly everyone who can access it, is not aggressive, and requires no ongoing effort once set up. We recommend it more often than any other single planning step.

Two caveats we would attach.

The first is that the benefit is overwhelmingly concentrated in pensions and electric cars, and everything else marketed as a salary sacrifice benefit is largely a hangover from before 2017. Be sceptical of a benefits platform selling sacrifice on gym memberships and gadgets. Since the tax saving is thin, what is really being sold is the platform.

The second is that people focus on the employee saving and ignore the employer one, which is now much larger. That imbalance is the most useful fact in this article for both sides. Employees should use it when asking for a scheme. Employers should recognise that they are the main beneficiary and behave accordingly.

How IAK Can Help

We set up and run salary sacrifice arrangements for employers across North London as part of our payroll service. That covers the contract variations, the minimum wage testing, the auto enrolment interaction and the monthly payroll processing, so the arrangement holds up if HMRC ever asks.

For business owners and higher earners, the more valuable conversation is usually the tax planning one. Where your income sits relative to £50,270, £60,000 and £100,000 changes the answer completely, and so does whether you are an employee or a director of your own company. Our personal tax work covers the individual side, including making sure pension contributions are reflected correctly on your return.

If you are not sure whether a scheme is worth setting up, or whether you should be sacrificing at all, contact us for a free consultation. You may also find our guides to PAYE, National Insurance and what an accountant actually does useful background.

Sources

• Salary sacrifice for employers, GOV.UK, on the definition, contract requirements, the five exempt benefits, changing arrangements and the effect on statutory pay.
• Optional remuneration arrangements, HMRC Employment Income Manual EIM44000, on the April 2017 rules and the 75g/km car exclusion.
• Charging NICs on salary sacrificed pension contributions, Deloitte Taxscape, on the £2,000 cap taking effect from 6 April 2029 and the treatment of the excess.
• Budget: NIC saving on salary sacrifice pension contributions capped, ICAEW, on the Autumn Budget 2025 announcement.
• National Minimum Wage and National Living Wage rates, GOV.UK, on the £12.71 National Living Wage from April 2026.
• National Insurance rates and categories, GOV.UK, on the 2026/27 employee and employer rates and thresholds.
• Boost your pension with salary sacrifice, MoneyHelper, on the effect on mortgages, borrowing and statutory entitlements.