Pension Salary Sacrifice: How It Works and What It Saves

Pension salary sacrifice (also called salary exchange) swaps some salary for a matching employer contribution to your workplace pension. The pay you give up is not taxed, so you save income tax at your top rate plus employee National Insurance: 8p per £1 below £50,270 and 2p above. Your employer saves up to 15p.

Two people on £60,000 can each put £3,000 into a pension at very different costs. For one of them it costs £2,400, because she hasn’t claimed her higher rate relief. The other uses salary sacrifice, and the same £3,000 costs him £1,740.

The gap comes down to how your scheme gives tax relief and whether you’ve claimed what’s due. Net pay and salary sacrifice both normally give full relief through payroll, but only salary sacrifice also saves National Insurance.

What pension salary sacrifice saves you depends on your tax band, your scheme’s relief method, whether your employer shares its saving, and how close you are to the minimum wage.

From April 2029, it’ll also depend on whether you sacrifice more than £2,000 a year. Figures use 2026/27 rates outside Scotland, with Scottish figures where they differ.

Pension salary sacrifice adds an NI saving

There are three ways your money can reach a workplace pension, and each treats income tax and National Insurance differently:

• Net pay means your employer takes the contribution before working out income tax, so you normally get relief at your top rate through payroll.
• Relief at source means you pay from take-home pay, and your provider claims 20% from HMRC and adds it to your pot.
• Salary sacrifice means your contractual pay drops, and your employer pays the same amount into your pension as its own contribution.

Only the third route also reduces the pay that National Insurance is charged on. For a basic rate taxpayer, the income tax side works out the same under all three.

Take someone on £30,000 who pays 5% (£1,500), with a 3% employer contribution on top, at 2026/27 rates:

Salary sacrifice leaves £120 more in their pocket for the same £2,400 going into the pension. That £120 is the 8% employee NI on £1,500, and nothing else.

Does paying into a pension reduce tax? All three routes give income tax relief if you pay income tax, though relief at source adds it to your pot rather than your payslip.

Only salary sacrifice cuts National Insurance as well: per £1,000 sacrificed, that’s £80 extra if your pay sits below £50,270 and £20 extra above it, where employee NI drops from 8% to 2%.

The GOV.UK guide to tax on private pension contributions sets out when relief at source leaves you with something to claim.

Your payslip shows whether you’re on salary exchange

Salary exchange is another name for pension salary sacrifice, and the two terms describe the same arrangement. Whatever the label, your payslip gives the route away:

• Under salary sacrifice, income tax and National Insurance are both worked out on your reduced pay.
• Under net pay, a pension deduction comes off before income tax is worked out, while National Insurance is still charged on your full pay.
• Under relief at source, the pension deduction comes off after tax and equals 80% of your own contribution, because your provider adds the other 20%.

If you can’t tell from the payslip, ask payroll or your pension provider which basis the scheme uses. The answer decides whether you have anything to claim.

Salary sacrifice pension higher rate taxpayer: no claim needed

On £60,000 with a 5% contribution (£3,000), here’s what the same contribution costs in take-home pay:

• Net pay normally costs £1,800, because full relief comes through payroll.
• Relief at source costs £1,800 once the extra 20% has been claimed from HMRC.
• Relief at source costs £2,400 if no extra claim is made.
• Salary sacrifice costs £1,740, because 2% employee NI is saved as well.

The extra claim on a relief at source scheme is the bit that catches people out, because it only reaches you if you make it. The higher rate pension tax relief guide explains how to claim it, including for earlier years.

Under salary sacrifice, the pay you give up isn’t taxable and your employer’s contribution isn’t taxable on you either, so there’s no higher rate relief to claim back on a pension salary sacrifice tax return. That’s how salary sacrifice tax relief works at 40%: the saving happens before your pay is taxed.

Using salary sacrifice to avoid higher rate tax works on the slice of pay above £50,270. Sacrifice that slice and none of your salary is taxed at 40%, though your employee NI saving on it is 2% rather than 8%.

Scottish taxpayers save at Scottish rates. Sacrificing £1,000 from a £50,000 salary saves £500 in Scotland (42% income tax plus 8% NI), against £280 elsewhere in the UK, because the Scottish higher rate starts at £43,663.

Between £100,000 and £125,140 the saving climbs to 62p per £1. In that band, each £2 of adjusted net income costs £1 of personal allowance, so sacrificed pay wins allowance back. The personal tax allowance guide covers the taper.

Your employer’s NI saving can boost your pot

Employer National Insurance is 15% on pay above £5,000 a year in 2026/27, and salary sacrifice cuts the pay it’s charged on. In the £30,000 example, the £1,500 sacrifice saves the employer £225.

For staff under 21, apprentices under 25 and veterans, the employer rate is 0% on pay up to £50,270, so there’s no employer saving on that pay.

Your employer can keep that saving or add part or all of it to your pension. If all £225 goes in, the yearly contribution rises from £2,400 to £2,625 without costing you anything more.

Before you agree to join a salary sacrifice pension scheme, put two questions to HR or payroll:

• Does any of the employer National Insurance saving go into your pension?
• Are your pension contributions worked out on your old salary or on the reduced one?

Auto-enrolment is a separate thing from salary sacrifice. Salary sacrifice is one way of paying into a workplace pension, and The Pensions Regulator says employers mustn’t imply you’ll only be enrolled if you agree to it.

Bonus salary sacrifice and the annual allowance

A bonus can go into your pension through salary sacrifice too. HMRC’s guidance for employers includes an example of a £5,000 bonus sacrificed into an employer pension contribution, with no income tax or National Insurance charged.

On a £60,000 salary, a £5,000 bonus taken as cash leaves £2,900 after 40% tax and 2% NI. Sacrificed, the full £5,000 reaches your pension, and your employer saves £750 that it could add on top.

Everything going into your pensions counts towards the annual allowance, including the employer contributions that salary sacrifice creates. It’s £60,000 for 2026/27. Tax is only due on savings above your allowance, and you may be able to use allowance left over from the last three tax years.

The pension tax guide mentions the charge and carry forward alongside other pension tax rules.

High earners can face a smaller allowance, but only when two income tests are both met. The first needs threshold income over £200,000; the second needs adjusted income, which adds back pension savings, to be over £260,000. The allowance can fall as low as £10,000.

Pay given up under salary sacrifice arrangements made on or after 9 July 2015 is added back into threshold income, so a new sacrifice won’t take you under the £200,000 test.

The salary sacrifice pension maximum contribution is shaped by two rules: the annual allowance, and the rule that your cash pay mustn’t fall under National Minimum Wage rates once the sacrifice is taken off. For anyone aged 21 or over, that floor is £12.71 an hour from 1 April 2026.

When salary sacrifice pension contributions leave you worse off

The saving only exists where there’s tax or NI to save. Three situations need a closer look before you sign up.

Low earners

Someone on £12,000 pays no income tax and no employee NI, so sacrificing £600 cuts their take-home pay by the full £600. Under relief at source the same £600 would cost £480, because the provider claims 20% even for people who pay no income tax.

Net pay schemes give no relief through payroll to people who don’t pay income tax. For net pay contributions made from 2024/25 onwards, the government pays low earners a top-up once they’ve confirmed their payment details online.

Your State Pension record

Your State Pension builds from qualifying years. As an employee, a year counts once your earnings from one job, in pay periods at or above the lower earnings limit (£129 a week or £559 a month), add up to £6,708, even where the pay is too low to have NI deducted.

Check that your pay after the sacrifice stays at or above that weekly or monthly limit.

The HMRC guidance on salary sacrifice for employers also names Additional State Pension, Maternity Allowance and statutory payments among the things a lower salary can affect, and how salary sacrifice works covers the effect on statutory pay.

NHS staff

NHSBSA confirms that contributions to the NHS Pension Scheme, additional pension and NHS money purchase AVCs can’t be paid through salary sacrifice.

Sacrificing pay for other benefits reduces your pensionable pay, and in the 2015 Scheme that lowers the pension you build up that year.

The salary sacrifice cap from April 2029

Pension salary sacrifice isn’t being scrapped. From April 2029, the National Insurance exemption will cover just the first £2,000 a year that an employee sacrifices into a pension, and both employee and employer NI will be due on anything above it.

Income tax treatment stays the same, and employer contributions made outside salary sacrifice stay free of NI. The government’s April 2029 guidance includes giving up a bonus in its definition of salary sacrifice.

Parliament gave the government its power to bring in the cap through the National Insurance Contributions (Employer Pensions Contributions) Act 2026. It became law on 29 April 2026.

Using 2026/27 NI rates as a rough guide:

• On £30,000 at 5%, the £1,500 sacrifice sits under the cap and nothing changes.
• On £45,000 at 10%, £2,500 of the £4,500 sacrifice sits above the cap, adding about £200 of employee NI and £375 for the employer.
• On £60,000 at 8%, £2,800 sits above the cap, adding about £56 of employee NI and £420 for the employer.

Higher earners lose less in employee NI because their excess falls in the 2% band, while their employers pay 15% at both salaries.

Employers will use their existing payroll software to report what’s sacrificed, with more guidance due on GOV.UK before April 2029.

Before you sign a pension salary sacrifice agreement

Pension salary sacrifice turns part of your pay into an employer contribution, so the pay you give up escapes income tax and National Insurance. Compared with net pay or relief at source, the extra gain is the NI: 8p or 2p per £1 for you, and up to 15p for your employer.

Before you sign, check which method your scheme uses now, whether your employer shares its saving, and that your pay afterwards doesn’t drop below the minimum wage or the lower earnings limit of £129 a week.

Higher rate taxpayers on relief at source today should check they’ve claimed the extra relief they’re owed.

NHS staff, low earners and anyone sacrificing more than £2,000 a year have extra rules to weigh up, including the April 2029 cap.

The general salary sacrifice guide covers the contract, payslip and benefit effects that apply to every salary sacrifice.

Key Takeaways

• Pension salary sacrifice swaps salary for an employer pension contribution, so the pay you give up escapes income tax and National Insurance.
• Against net pay or relief at source, the extra saving is National Insurance: 8p per £1 below £50,270 and 2p above, plus up to 15p for your employer.
• Higher rate taxpayers on salary sacrifice get full relief through payroll with nothing to claim, unlike relief at source members, who claim the extra themselves.
• Someone earning below the tax and NI thresholds can pay more for the same contribution under salary sacrifice than under relief at source.
• From April 2029, pension salary sacrifice above £2,000 a year will attract National Insurance, while the income tax treatment doesn’t change.
• NHS Pension Scheme contributions can’t be paid by salary sacrifice, and sacrificing pay for other benefits reduces NHS pensionable pay.