Salary Sacrifice Explained: How It Works and How Much You Can Save (2026/27)
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How salary sacrifice works in 2026/27: the Income Tax and National Insurance you save, a worked example, the risks to watch, and answers to common questions.
Salary sacrifice is one of the simplest ways to cut your tax bill while building a bigger pension. In the 2026/27 tax year it lets you give up part of your gross pay in exchange for a non-cash benefit, so you pay less Income Tax and National Insurance on the same overall package. This guide explains exactly how it works, how much you can save, and the pitfalls to watch for.
What is salary sacrifice?
Salary sacrifice means you agree with your employer to give up part of your gross salary in return for a non-cash benefit. The most common use is making extra pension contributions, but it is also widely used for cycle-to-work schemes, electric vehicles (EVs) and childcare.
Because the amount you sacrifice comes out of your gross pay before tax, your taxable salary falls. That is what creates the saving: HMRC only taxes the lower figure, and your employer reports the lower salary too. The way this is handled through PAYE is set out in HMRC's salary sacrifice and PAYE guidance. This is different from paying into a pension from your wages after tax, where the money has already been taxed before it reaches your pot.
The arrangement is a formal change to your contract of employment, so it must be agreed in advance with your employer and cannot usually be backdated. Most schemes let you review or change the amount at certain points, such as a salary review or a life event like having a child.
How the savings work
When your gross salary falls, two things happen at once. You pay less Income Tax and you pay less employee National Insurance (NI).
- Income Tax is saved at your marginal rate: 20% if you are a basic-rate taxpayer, 40% at the higher rate, or 45% at the additional rate. The higher your rate, the more each pound of sacrifice saves you. If you are unsure which bands apply to you, our income tax calculator works it out, and the UK income tax rates and bands guide explains each threshold.
- Employee National Insurance is charged at 8% on earnings between £12,570 and £50,270, and 2% on earnings above £50,270. Sacrificing salary reduces the NI you pay in whichever band applies; you can check your own contributions with the national insurance calculator or read the full breakdown of National Insurance rates for 2026/27.
- Your employer also saves Employer NI, charged at 15% on earnings above £5,000. Many employers add some or all of that saving to your pension, boosting your pot even further.
The combined effect is that money goes further inside your pension than it would if you paid it in from your take-home pay. A higher-rate taxpayer saving 40% Income Tax plus 2% NI keeps even more of each pound, which is why salary sacrifice is especially popular with those earning above £50,270. You can model the figures for your own salary with our salary sacrifice calculator.
Worked example: £40,000 salary
Suppose you earn £40,000 and pay tax at the basic rate. You decide to sacrifice £2,000 into your pension over the year.
| Item | Amount |
|---|---|
| Sacrificed into pension | £2,000 |
| Income Tax saved (20%) | £400 |
| Employee NI saved (8%) | £160 |
| Total tax and NI saved | £560 |
| Actual reduction in take-home pay | £1,440 |
In other words, putting £2,000 into your pension only costs you £1,440 in lost take-home pay. The remaining £560 is money you would otherwise have handed to HMRC. To see how a change like this affects your monthly pay packet, try the take-home pay calculator, and our guide on how to calculate your take-home pay walks through each deduction.
Tip: If your employer passes on their 15% Employer NI saving to your pension, a £2,000 sacrifice could add even more than £2,000 to your pot. Always ask your payroll team whether the employer NI saving is reinvested.
How much can you put in?
For pension contributions, the main limit is the Annual Allowance, which is £60,000 in 2026/27. This covers your own contributions, salary sacrifice and any employer contributions combined. Going above the allowance can trigger a tax charge, so high earners and those with large pots should check carefully.
Salary sacrifice into a pension also benefits from tax relief in the same way as other pension saving. If you want to understand how relief is applied across the bands, our pension tax relief calculator breaks it down, and our pension tax relief guide explains how you can claim back up to 45%.
Other uses beyond pensions
While pensions are the most popular choice, salary sacrifice can also fund other workplace benefits. A cycle-to-work scheme lets you buy a bike and equipment out of gross pay, and an electric vehicle (EV) scheme can make leasing a low-emission car far cheaper than paying for it from net income. Some employers also offer childcare arrangements through sacrifice. The same principle applies in each case: you give up gross salary, so you pay less Income Tax and NI on what remains. The exact saving depends on the benefit and your tax band, so it is worth checking the specific scheme rules your employer offers.
The risks and limits to watch
Salary sacrifice is valuable, but lowering your headline salary has knock-on effects you should weigh up first.
- National Minimum and Living Wage: you cannot sacrifice salary if it would take your pay below the legal minimum wage.
- Mortgage borrowing: a lower salary on paper can reduce how much a lender is willing to offer you.
- Statutory benefits: some payments are based on your salary, including statutory maternity pay, so a reduced salary may reduce them. You can estimate this with our maternity pay calculator before you commit.
- Life cover: if your employer's life insurance is a multiple of salary, a lower salary may mean lower cover.
None of these necessarily rule salary sacrifice out, but they are worth checking before you commit, especially if you are planning to apply for a mortgage or take parental leave.
Who benefits most from salary sacrifice
Salary sacrifice helps most employees who want to put more into a pension, but the size of the benefit varies a great deal depending on your circumstances. Understanding where you sit helps you judge whether it is worth setting up.
- Higher and additional-rate taxpayers gain the most per pound. Saving Income Tax at 40% or 45%, on top of the National Insurance saving, means each pound sacrificed costs far less than a pound of take-home pay. This is why the arrangement is especially popular with those earning above £50,270.
- People near the £100,000 mark can use sacrifice to bring taxable income down, which is significant because the Personal Allowance tapers away between £100,000 and £125,140. Reducing income below £100,000 can restore part of that allowance, making the effective saving unusually large.
- Basic-rate taxpayers still benefit, saving 20% Income Tax and 8% NI, even if the headline saving is smaller than for higher earners.
- Those whose employers reinvest the Employer NI saving do best of all, because the 15% the business saves can be added to their pension on top of the sacrifice.
If you are unsure how much you would save at your salary, model it with the salary sacrifice calculator before committing, and check the wider effect on your pay with the take-home pay calculator.
How to set up salary sacrifice with your employer
Because salary sacrifice is a formal change to your employment contract, it has to go through your employer rather than being something you arrange yourself. The process is usually straightforward, but it helps to know what to expect.
- Check your employer offers it. Not every workplace runs a salary sacrifice scheme, so start by asking payroll or HR what is available and for which benefits.
- Decide the amount. Work out how much you want to sacrifice, keeping in mind the £60,000 Annual Allowance for pensions and the requirement to stay above the National Minimum or National Living Wage.
- Agree the contract change. Your employer updates your contract to reflect the lower gross salary in exchange for the benefit. This cannot usually be backdated.
- See it on your payslip. From the next pay period, your gross pay shows the reduced figure, and Income Tax and NI are calculated on that lower amount.
- Review at the right time. Most schemes let you adjust the amount at a salary review or after a life event such as having a child.
Before you finalise the figure, it is worth seeing your whole deduction picture, including how the lower gross pay changes your Income Tax. Our income tax calculator helps you check this.
Common mistakes to avoid
Salary sacrifice is a reliable way to save, but a few avoidable errors can reduce the benefit or cause problems later.
- Sacrificing below the minimum wage. The arrangement cannot take your pay below the National Minimum or National Living Wage, so very large sacrifices on a modest salary may be blocked by payroll.
- Overlooking the Annual Allowance. Pension contributions across all sources are capped at £60,000 for 2026/27. Exceeding it can trigger a tax charge that wipes out the saving.
- Forgetting the knock-on effects. A lower headline salary can reduce mortgage borrowing, statutory maternity pay and salary-linked life cover, so check these before you commit.
- Assuming the employer NI saving is always reinvested. Some employers pass on their 15% saving to your pension and some keep it. Always ask, as it can make a meaningful difference to your pot.
Frequently asked questions
Does salary sacrifice reduce both tax and National Insurance?
Yes. Because your gross salary falls, you pay less Income Tax at your marginal rate and less employee National Insurance. That is why salary sacrifice is usually more efficient than paying into a pension from your take-home pay.
What can I use salary sacrifice for?
The most common use is extra pension contributions. It is also used for cycle-to-work schemes, electric vehicles and childcare arrangements offered through your employer.
How much can I sacrifice into my pension?
Your total pension contributions for 2026/27 are normally capped by the Annual Allowance of £60,000, which includes your contributions, salary sacrifice and employer contributions combined.
Can my employer add to my pension as well?
Often, yes. Employers save Employer NI at 15% on the salary you give up, and many choose to add some or all of that saving to your pension, increasing the total invested.
Will salary sacrifice affect my mortgage?
It can. Lenders look at your salary, and reducing it on paper may lower the amount you can borrow. If you are about to apply for a mortgage, consider the timing carefully.
Is there a minimum salary I must keep?
Yes. You cannot sacrifice salary below the National Minimum or National Living Wage. Your employer's payroll team will check this before applying any arrangement.
How does pension salary sacrifice reduce my tax bill?
With pension salary sacrifice in the UK you agree to give up part of your gross salary, and your employer pays that amount straight into your pension instead. Because the money never counts as your taxable pay, your Income Tax bill falls at your marginal rate and you also pay less employee National Insurance on the lower figure. In effect HMRC taxes a smaller salary, so the contribution costs you less than its face value. Model the saving for your own pay with the salary sacrifice calculator.
How does pension salary sacrifice affect my take-home pay?
Your salary sacrifice take home pay does drop, but by less than the amount you put into your pension, because the lost Income Tax and National Insurance partly fund the contribution. As the worked example above shows, a basic-rate taxpayer sacrificing £2,000 only sees take-home pay fall by around £1,440. To see the monthly effect on your own pay packet, try the take-home pay calculator.
How much tax saving do I get from a pension contribution?
The pension contribution tax saving depends on your marginal rate: a basic-rate taxpayer saves 20% Income Tax plus 8% National Insurance on the sacrificed amount, while a higher-rate taxpayer saves 40% plus 2%. The higher your tax band, the more each pound saves you. Our pension tax relief calculator works out the relief you are entitled to.
Is it worth increasing my pension contribution to avoid the 60% tax trap?
For income between £100,000 and £125,140 the Personal Allowance tapers away, creating an effective marginal rate of around 60%. Increasing your pension contribution through salary sacrifice reduces your taxable income, which can pull it back below £100,000 and restore some or all of the lost allowance, so each pound sacrificed in this band can be unusually valuable. Check the impact for your salary with the 60% tax trap calculator before deciding.
Related calculators: Salary Sacrifice Calculator, Salary Calculator, Take-Home Pay Calculator, Income Tax Calculator and the National Insurance Calculator.
This guide is general information for the 2026/27 tax year, not personal tax advice. Check your own circumstances at gov.uk.
Written by
Laura Michelle Davis — Chartered Tax Adviser (CTA)
ACCA · CTA (Chartered Tax Adviser) · ATT · BSc Economics, UC Berkeley
Laura Michelle Davis is a Chartered Tax Adviser (CTA) who also holds the ACCA and ATT qualifications and a BSc in Economics from UC Berkeley. She specialises in UK personal tax, covering income tax, National Insurance, self-employment and capital gains, and has built her career making complicated rules easy to follow. At TaxFly, Laura writes and edits the tax guides and explainers, checking that figures reflect current HMRC rates and that every explanation answers the question a real person is actually asking. Her goal is plain-English clarity you can trust and act on.
