Salary sacrifice explained (2026/27)

Salary sacrifice is one of the few genuinely tax-efficient things an ordinary employer can offer — and most people still get less than they could from it. Done properly, the same money lands in a pension while both the employee and the employer pay less National Insurance. Here's how it works, a worked example with 2026/27 figures, and the traps to check before you set it up.

The short version

Under salary sacrifice (sometimes called salary exchange), an employee agrees to give up part of their gross contractual salary in return for a non-cash benefit. By far the most common use is an employer pension contribution: instead of paying you £2,000 of salary and then you paying it into your pension, your employer pays you £2,000 less and puts that £2,000 straight into your pension as an employer contribution.

Because it's a reduction in contractual pay, it isn't just a payslip tweak — it's a change to the employment contract, agreed in writing. That distinction matters, and it's where the rules below come from.

Why it saves money: the dual NI saving

The amount that's sacrificed never counts as the employee's pay, so it escapes tax on both sides:

• The employee saves Income Tax (20%, 40% or 45%) and employee National Insurance (8% on earnings between £12,570 and £50,270, 2% above that) on the sacrificed amount.
• The employer saves employer National Insurance — 15% for 2026/27 on pay above the £5,000 secondary threshold — on the sacrificed amount.

That employer saving is the part people forget. A good employer doesn't just pocket the 15% — they add it to the pension contribution, so the employee ends up with more in their pot than they gave up in salary. That's what makes pension salary sacrifice better than a normal "relief at source" pension deduction, where the employer NI saving never appears at all.

A worked example — 2026/27

Take an employee on a £40,000 salary who sacrifices £2,000 into their pension. Their salary for tax and NI becomes £38,000. At £40,000 the whole £2,000 sits in the basic-rate band and in the main NI band, so:

So the employee's take-home falls by just £1,440, yet £2,300 lands in the pension — a £860 boost on £1,440 of net pay before any investment growth. Even if the employer keeps its £300 NI saving, £2,000 still goes in for a £1,440 cost. The maths is the same idea at higher rates, except a 40% taxpayer saves £800 Income Tax and £40 NI (2% above the upper limit), giving up only £1,160 of take-home for the same £2,000.

What can be sacrificed

Pension is the big one, but a few other benefits still keep the tax and NI advantage. Since the "OpRA" rules (Optional Remuneration Arrangements) came in from April 2017, most benefits provided through salary sacrifice are now taxed on the higher of the cash given up or the benefit's value — so the advantage largely disappeared. A short list of benefits was specifically protected and still works:

• Employer pension contributions (and pension advice).
• Cycle-to-work schemes.
• Ultra-low-emission and electric (EV) cars — still highly tax-efficient thanks to low benefit-in-kind rates.
• Employer-provided childcare / workplace nurseries (the older childcare voucher scheme is closed to new joiners).

For almost everything else — gym memberships, general health cover, the latest phone — sacrifice no longer saves tax, so it's rarely worth the contract change.

The pitfalls to check first

Salary sacrifice is legitimate and HMRC-recognised, but it lowers your contractual pay, and a few things hang off that figure. Check these before you sign up:

• National Minimum / Living Wage. Sacrifice cannot take cash pay below the statutory minimum. This is the hard limit — for lower earners it can rule the scheme out entirely.
• Mortgage and borrowing capacity. Lenders look at your reduced salary. A large sacrifice can shrink how much you can borrow, even though your pension is growing.
• Statutory pay. Statutory Maternity Pay and other statutory payments are based on your reduced earnings, so a sacrifice in the reference period can lower them.
• Life cover and other multiples. "Four times salary" death-in-service and similar benefits may be calculated on reduced pay unless the scheme is set to use a notional "reference salary".
• Contract variation. It must be a genuine, agreed change to the contract — not a retrospective payslip adjustment. It also can't normally be switched on and off at will (life events aside).
• Auto-enrolment. Sacrifice interacts with auto-enrolment minimum contributions and qualifying earnings; the scheme has to be designed so minimums are still met.

None of these are dealbreakers for most employees — but they're exactly the points where a scheme set up casually goes wrong.

FAQ

Does salary sacrifice reduce my State Pension? It can in principle, because you pay slightly less NI — but for most people earning comfortably above the lower limits the qualifying years still count, so there's usually no practical effect. It's worth checking if you're near the thresholds.

Is it the same as a normal pension deduction? No. A normal deduction comes out of pay you've already been taxed and NI'd on (with tax relief added back). Sacrifice removes the amount before tax and NI, and unlocks the employer NI saving on top.

Can the employer keep the NI saving? Yes — passing it on is good practice, not a legal requirement. Either way the arrangement should be clear in writing.

Does it work for overseas employers running UK payroll? Yes, where UK NI is being operated. The mechanics are the same; it just needs setting up correctly within the payroll.

This guide is general information, not tax or financial advice, and reflects our understanding of the rules as at June 2026. Figures use 2026/27 England, Wales & Northern Ireland rates and your circumstances may differ — please get specific advice before acting.