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Salary Sacrifice Calculator — UK Pension & National Insurance Savings
See how sacrificing part of your salary into a pension cuts your income tax and National Insurance, and how much lands in your pension for every pound of take-home pay you give up. Uses 2026/27 UK rates for England, Wales & NI and Scotland, with employer NI pass-back and student loans built in.
7 min read
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Updated 23 July 2026
|🇬🇧 UKIntermediate
Enter a valid salary (£1 – £10,000,000)
Sacrifice cannot exceed your salary
Enter a pounds-per-year figure, or switch to a percentage of your salary.
Some employers add part of their 15% NI saving to your pension. Enter the % they pass on (0 if none).
Your Results
New Take-Home Pay (per year)
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Income Tax Saved
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Employee NI Saved
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Total Into Pension
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Cost Per £1 Into Pension
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Employer NI Added To Pension
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Student Loan Saved (per year)
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Component
Without Sacrifice
With Sacrifice
Run the calculator to see the breakdown
Enter your salary and how much you want to sacrifice to see your new take-home pay, the income tax and National Insurance you save, and how much lands in your pension for every pound of take-home you give up.
Key Takeaways
Salary sacrifice reduces your gross pay before tax and NI, so your pension gets 100% of the amount while your take-home falls by much less.
A basic-rate taxpayer saves 20% income tax and 8% NI — £1,000 into the pension costs about £720 of take-home pay (2026/27).
A higher-rate taxpayer saves 40% tax and 2% NI, so £1,000 costs roughly £580.
Employers save 15% employer NI too, and some pass part of it back into your pension.
How salary sacrifice works
What is salary sacrifice?
Salary sacrifice is a formal agreement to give up part of your gross salary in exchange for a bigger employer pension contribution. Because you never receive that pay as cash, it is not counted for income tax or National Insurance — so the pension gets the full amount for a smaller drop in take-home. HMRC treats it as a change to your employment contract, sometimes called an Optional Remuneration Arrangement.
How is it different from a normal pension contribution?
A standard "relief at source" pension only refunds your income tax. Salary sacrifice lowers your pay before payroll runs, so you also avoid the employee National Insurance — 8% for most earners in 2026/27, or 2% above the £50,270 upper earnings limit. That extra NI saving is what makes sacrifice the most efficient way to fund a UK pension for most employees.
Take-home cost per £1 = (drop in take-home pay) ÷ (total into pension)
Income tax saved — sacrifice × your marginal tax rate (20% / 40% / 45%, or Scottish rates)
Employee NI saved — sacrifice × 8% (or 2% above £50,270)
Employer NI saved — sacrifice × 15% above the £5,000 secondary threshold (optionally passed back)
Total into pension — the amount you sacrifice, plus any employer NI pass-back
How much does salary sacrifice save you?
Worked example: sacrificing £3,000 on a £40,000 salary
On a £40,000 salary (England, Wales & NI, 2026/27), sacrificing £3,000 puts the full £3,000 into your pension but drops your take-home pay by only £2,160 — an effective cost of £0.72 per £1 saved. You avoid £600 of income tax (20% of £3,000) and £240 of National Insurance (8% of £3,000), and your new take-home pay is about £30,160 a year.
The reason take-home falls by less than you sacrifice is that £840 of the £3,000 would otherwise have gone to HMRC anyway. Salary sacrifice simply redirects the tax and NI you were already losing straight into your own pension. To see your full deductions on any salary, run it through the UK salary calculator with and without a sacrifice.
Retrieval gap · Employer NI pass-back
When you sacrifice £3,000, your employer also saves 15% employer National Insurance — £450 — because employer NI applies to earnings above the £5,000 secondary threshold. A "pass-back" employer adds that £450 to your pension, turning a £3,000 sacrifice into a £3,450 pension deposit at no extra cost to you. Set the pass-back slider above to model it.
How do Scottish tax bands change the saving?
Scottish taxpayers often save more, because Scotland sets higher income tax rates (up to 48%) while National Insurance stays UK-wide. The sharpest example sits between £43,663 and £50,270: a Scottish earner there pays 42% income tax and 8% NI at the same time, so every £1 sacrificed in that band saves 50p. Switch the region to Scotland above to see it.
Retrieval gap · Scotland's 50% band
In 2026/27 the Scottish higher rate of 42% starts at £43,663, but the UK-wide NI upper earnings limit — where employee NI drops from 8% to 2% — is £50,270. Between those two figures a Scottish worker faces a combined 50% marginal deduction, so salary sacrifice returns exactly 50p per £1. No mainstream calculator flags this overlap. Rates: Scottish Government and HMRC.
Salary sacrifice and the pension annual allowance / adjusted income
Can salary sacrifice reduce my adjusted net income?
Yes — and this is often worth more than the headline tax saving. Because you give the pay up before tax, salary sacrifice lowers your adjusted net income, the figure HMRC uses for several expensive thresholds. Drop below £100,000 and you reclaim your tapered personal allowance; drop below £60,000 and you escape the High Income Child Benefit Charge.
Retrieval gap · The £100k and £60k traps
Between £100,000 and £125,140 your £12,570 personal allowance tapers by £1 for every £2 earned, creating an effective 60% marginal rate — so sacrificing back under £100,000 is unusually powerful. Our £100k tax trap calculator works out the exact sacrifice needed to escape it. Separately, the High Income Child Benefit Charge claws back 1% of Child Benefit for every £200 of adjusted net income over £60,000, with all of it gone by £80,000. Sacrificing below £60,000 keeps 100% of your Child Benefit.
What is the pension annual allowance for 2026/27?
You can normally pay up to £60,000 a year into pensions tax-free — your annual allowance — across all contributions including your employer's. Very high earners can see this tapered down to as little as £10,000 once adjusted income exceeds £260,000. If a bonus or large sacrifice would breach the limit, you may be able to use carry-forward from the previous three tax years.
When salary sacrifice is a bad idea
Can salary sacrifice push you below minimum wage?
No — your employer cannot let it. A sacrifice is not allowed to drop your cash pay below the National Minimum Wage, which is £12.71 an hour for workers aged 21 and over from April 2026 (GOV.UK). On a standard 37.5-hour week that is a floor of about £24,785 a year, so lower earners can only sacrifice a limited amount.
Will it affect your mortgage or benefits?
It can. Lenders usually size a mortgage from your gross salary, and a lower headline figure may reduce how much you can borrow — though many lenders add pension contributions back or accept a pre-sacrifice salary letter. Salary-linked benefits such as Statutory Maternity Pay, redundancy pay and death-in-service cover can also be based on the reduced salary, so check before sacrificing heavily.
Upcoming change · April 2029 NI cap
The government has announced that from April 2029 the National Insurance relief on pension salary sacrifice will be capped at £2,000 a year. Sacrifice above £2,000 would then pay employee and employer NI as normal, although income tax relief is unchanged. This is not yet in force — the calculator uses current 2026/27 rules — but it is worth knowing if you rely on large annual sacrifices.
Income & Tax
Beyond pensions: which salary sacrifice schemes still save tax
By CalculatorDashboard Editorial Team·Updated ·Reviewed ·3 min read
Most of this page is about pension salary sacrifice, which is by far the most common and usually the most valuable kind. But employers offer sacrifice for many other things, from bikes and cars to phones and gym memberships, and the tax treatment varies a lot. Some schemes still save income tax and National Insurance. Others save almost nothing and only spread the cost. This guide sorts them out.
Why most perks stopped saving tax
Until 2017, almost anything bought through salary sacrifice saved tax, because the benefit you received was often taxed less than the salary you gave up. The rules then changed. For most benefits, you're now taxed on whichever is higher: the salary you sacrificed or the taxable value of the benefit. For a gadget or gym membership bought through sacrifice, that usually means paying roughly the same tax as if you'd bought it from your salary. These schemes can still help by spreading the cost or getting a discount, but the tax saving has largely gone.
A handful of benefits were protected from that change. They're the ones worth knowing about.
Pensions: still the biggest saving
Employer pension contributions are exempt from income tax and National Insurance, so sacrificing salary into a pension still saves both. A basic-rate taxpayer saves 20% tax and 8% National Insurance on each pound, a higher-rate taxpayer 40% and 2%. If your employer passes on some or all of the employer National Insurance it saves, the benefit is bigger still. From April 2029 the government plans to cap the National Insurance relief at £2,000 of sacrifice a year; income tax relief is unaffected, and the current rules apply for 2026/27. The calculator above works out the saving for your salary.
Cycle to work
Bikes and safety equipment bought through a cycle to work scheme remain tax-free, as long as the bike is used mainly for commuting. Take a £1,200 bike paid for over a year. A basic-rate taxpayer saves about £336 in tax and National Insurance, and a higher-rate taxpayer about £504. At the end of the hire period you usually pay a small amount to take ownership, which reduces the saving slightly. Check the scheme's ownership terms before you sign up.
Electric cars
Electric company cars are taxed as a benefit in kind, but at a very low rate: the appropriate percentage for zero-emission cars is set to rise by one percentage point a year, from 3% in 2025/26 to 4% in 2026/27 and 5% in 2027/28. Through salary sacrifice, you give up salary to lease the car and pay tax only on that small percentage of its list price. For many employees, especially higher-rate taxpayers, this is cheaper than leasing the same car privately from taxed income. The saving falls as the percentage rises, so look at the whole lease term, not just the first year.
Things to check before sacrificing
Every sacrifice reduces your contractual pay, and that can affect other things. Sacrifice can't take your pay below the National Minimum Wage. Some mortgage lenders assess your post-sacrifice salary. Statutory payments like maternity pay are based on actual earnings, so a large sacrifice before or during the qualifying period can reduce them. Death-in-service and other benefits may be calculated on the lower salary unless the employer uses a notional salary. Ask your HR team how the scheme handles each of these.
Next steps
Use the calculator above for the pension saving on your salary. If you're near £100,000, the £100k tax trap calculator shows how sacrifice can restore your Personal Allowance, and the Child Benefit charge calculator does the same for the £60,000 to £80,000 taper.
For a longer walk-through, see our guides: salary sacrifice explained covers the effects on mortgages, maternity pay and the April 2029 cap, and the £100k tax trap explained gives take-home figures through the taper, including the Scottish 69.5% rate.
Salary sacrifice FAQs
How much does salary sacrifice save you?
For a basic-rate taxpayer, sacrificing £1,000 typically saves £200 income tax and £80 National Insurance, so £1,000 goes into your pension for about £720 of take-home pay. Higher-rate taxpayers save 40% tax plus 2% NI, making the effective cost roughly £580 per £1,000.
Does salary sacrifice reduce National Insurance?
Yes — that's its main edge over normal pension contributions. Because the sacrificed pay is given up before NI is calculated, you don't pay employee NI on it (8% for most earners in 2026/27, 2% above the upper threshold). Many employers also pass on some of their own 15% NI saving.
Is salary sacrifice worth it in 2026?
Usually yes if you earn comfortably above £12,570, don't need the cash now, and it won't drop your pay below minimum wage or hurt a mortgage application. The tax and NI savings make it one of the most efficient ways to fund a UK pension. It's rarely worth it near the personal allowance.
Can salary sacrifice reduce my adjusted net income?
Yes. Because you give up the salary before tax, salary sacrifice lowers your adjusted net income — useful for keeping the £100,000 personal-allowance taper, the £60,000 High Income Child Benefit Charge, or free-childcare thresholds at bay. This is often a bigger win than the headline tax saving.
What are the downsides of salary sacrifice?
Your lower headline salary can reduce mortgage borrowing, life cover based on salary, and some earnings-related benefits. You can't sacrifice below the National Minimum Wage, and if you earn under the personal allowance you may lose more in tax relief than you gain. The pension is also locked until age 55/57.
Does salary sacrifice reduce student loan repayments?
Yes. Student loan repayments are worked out on the pay you're left with after sacrifice, so giving up salary lowers the earnings assessed and cuts your 9% (or 6% for postgraduate) monthly deduction. It slightly boosts take-home now but can extend the loan term. Plan 1 starts at £26,900, Plan 2 at £29,385, Plan 4 at £33,795 and Plan 5 at £25,000 in 2026/27.
Does salary sacrifice affect your mortgage?
It can. Most lenders size a mortgage from your gross salary, and salary sacrifice lowers that headline figure — so a strict lender may offer less. Many lenders will add pension contributions back, or accept your pre-sacrifice salary on a letter from your employer, so it is often avoidable if you plan ahead.
What is the 2029 change to salary sacrifice?
From April 2029 the government plans to cap the National Insurance relief on pension salary sacrifice at £2,000 a year. Sacrifice above £2,000 would then attract employee and employer NI as normal, though the income tax relief is unaffected. It is announced but not yet in force for 2026/27.
Figures are estimates based on 2026/27 UK tax year rates and rules (correct as of 2026-07-23) and assume a standard pension salary sacrifice arrangement. Tax legislation may change. Salary sacrifice can affect mortgages, benefits and other salary-linked entitlements — verify with HMRC or MoneyHelper, or speak to a qualified adviser before making changes. This is not financial advice.