Salary Sacrifice Calculator (2026/27)

Use the salary sacrifice calculator above

Enter your gross annual salary and the amount you want to give up, and the tool above estimates your new take-home pay, the Income Tax and National Insurance you save, and the net cost of every pound landing in your pension for 2026/27. Use it to test a few sacrifice amounts side by side before you speak to payroll.

How salary sacrifice actually works

Salary sacrifice is a formal agreement to give up part of your contractual gross salary in return for your employer paying that amount straight into your pension. Because the money never counts as your pay, it is never taxed and never charged National Insurance. That is the whole point: you are moving money before HMRC sees it, not after.

The plain-English formula the salary sacrifice calculator uses is:

• New gross pay = Old gross salary − Amount sacrificed
• Tax saved = Amount sacrificed × your top Income Tax rate
• NI saved = Amount sacrificed × your National Insurance rate on that slice
• Net cost to your take-home = Amount sacrificed − Tax saved − NI saved
• Into your pension = the full amount sacrificed (often more, if your employer adds their own NI saving)

For an employee in England, Wales or Northern Ireland the basic rate is 20% and the higher rate is 40%, with the additional rate at 45% above £125,140 of taxable income. Employee National Insurance is 8% on earnings between £12,570 and £50,270, then 2% above that. So the rate you save depends on which slice of your income you are sacrificing. Sacrifice from the top of a higher-rate salary and you save 40% tax plus 2% NI; sacrifice from a basic-rate wage and you save 20% plus 8%.

One bonus that ordinary pension contributions miss: salary sacrifice saves employee National Insurance, which relief-at-source and net-pay pension schemes do not. Many employers also pass on some or all of the 15% employer National Insurance they save, topping up your pot further. You can sense-check the wider picture with our pension tax relief calculator and see the payslip effect with the take-home pay calculator.

Worked examples with the maths shown

Basic-rate earner on £30,000 sacrificing £2,000

Take a nurse on £30,000 who wants £2,000 a year going into her pension. The £2,000 sits inside the basic-rate band, so she saves 20% Income Tax (£400) and 8% National Insurance (£160). Total saved: £560.

• Into the pension: £2,000
• Real cost to take-home pay: £2,000 − £560 = £1,440

She gets £2,000 invested for £1,440 out of pocket, before any employer NI top-up.

Higher-rate earner on £60,000 sacrificing £5,000

Now a manager on £60,000 sacrificing £5,000. Because all £5,000 comes off income above the £50,270 Upper Earnings Limit, it saves 40% tax (£2,000) and 2% NI (£100). Total saved: £2,100.

• Into the pension: £5,000
• Real cost to take-home pay: £5,000 − £2,100 = £2,900

That is £5,000 in the pot for £2,900 of net pay given up. Compare the contractor and dividend routes with our National Insurance calculator if your pay is structured differently.

The £110,000 sweet spot sacrificing £10,000

This is where salary sacrifice is at its most powerful. On £110,000, every pound over £100,000 strips away £1 of Personal Allowance for every £2 earned, so a band of income is effectively taxed at 60%. Someone on £110,000 has lost £5,000 of their £12,570 allowance.

Sacrifice £10,000 to bring income down to £100,000 and the full Personal Allowance is restored. The £10,000 was taxed at 40% (£4,000), and recovering £5,000 of allowance that would also have been taxed at 40% saves another £2,000 - an effective 60% Income Tax relief of £6,000, plus 2% NI of £200.

• Into the pension: £10,000
• Real cost to take-home pay: £10,000 − £6,200 = £3,800

You move £10,000 into your pension for £3,800. If your income strays into the £100,000–£125,140 zone, read our 60% tax trap calculator first - salary sacrifice is the cleanest way to escape it.

2026/27 rates that drive your saving

The relief you get is simply the tax and NI rate on the slice you sacrifice. Figures below are for England, Wales and Northern Ireland, checked for the 2026/27 tax year against gov.uk.

Sources: gov.uk Income Tax rates and gov.uk guidance on salary sacrifice and PAYE.

If you pay tax in Scotland

Scottish taxpayers use different Income Tax bands and rates on earned income, so your tax saving differs. A Scottish higher-rate taxpayer saves 42% Income Tax on the sacrificed slice, and the advanced and top rates of 45% and 48% mean salary sacrifice can be even more valuable higher up. National Insurance is set UK-wide, so the 8% and 2% rates apply wherever you live. Check your exact bands on gov.uk and our Scotland tax calculator.

Smart ways to use salary sacrifice

• Target a threshold. Sacrifice just enough to drop below £50,270 (out of higher-rate tax), £100,000 (to restore your Personal Allowance) or £60,000 if you receive Child Benefit - see the Child Benefit tax calculator for how the charge tapers.
• Mind the annual allowance. Total pension input is normally capped at £60,000 a year (including employer contributions and tapered for very high earners). Going over triggers a tax charge.
• Ask about the employer NI top-up. Some employers add their 15% NI saving to your pot, turning a good deal into a great one.

Common mistakes to avoid

• Sacrificing below the National Minimum Wage. Your reduced cash pay cannot legally fall below the minimum wage, so high sacrifices on a modest salary may be blocked.
• Forgetting the knock-on effects. A lower gross salary can shrink mortgage borrowing, statutory maternity pay, redundancy pay and salary-multiple life cover. If a mortgage is on the horizon, check timing with our mortgage affordability calculator.
• Assuming you save NI twice. You only save NI once, on the slice sacrificed - not on your whole salary.
• Ignoring access age. Money in a pension is locked until at least age 55 (rising to 57 from 2028), so do not sacrifice cash you need soon.

These figures are estimates for guidance only and are not personal tax or financial advice. Pensions are a long-term commitment; for free, impartial help see MoneyHelper or speak to a regulated adviser.

Related calculators to try next

Once you have your sacrifice figure, model the rest of your finances with the Income Tax calculator, work out your full deductions on the take-home pay calculator, and check you are inside the limits with the pension annual allowance calculator.

Who should use this calculator

Salary sacrifice means giving up part of your gross salary in return for a non-cash benefit — usually a pension contribution. Because the sacrifice happens before tax and National Insurance, both you and your employer pay less NI, which is what makes it more efficient than contributing from net pay.

The saving is larger than people expect because it is NI as well as Income Tax, and many employers pass their own NI saving into your pension too. It is at its most powerful for anyone near a threshold — sacrificing enough to drop below £100,000 restores the tapered Personal Allowance, an effective rate of 60% on that slice.

What this calculator assumes

• The sacrificed amount is deducted from gross pay before Income Tax and National Insurance.
• Your gross salary is genuinely reduced — that is what makes the NI saving legitimate.
• The full sacrificed amount reaches your pension, with no further relief to claim.
• Employer NI savings are shown, though whether they are added to your pension is your employer’s choice.

Limitations — what it does not cover

• The effect of a lower gross salary on mortgage borrowing, life cover, redundancy pay and maternity pay, which are often based on the reduced figure.
• The National Minimum Wage floor — sacrifice cannot take pay below it, which restricts lower earners.
• The annual allowance, and the tapered allowance for high earners.
• Other sacrifice benefits — cars, cycles, childcare — which have their own tax treatment.
• State benefit entitlements linked to NI contributions.
• Access. Money in a pension is locked until at least 55, rising to 57 from 2028.