Salary sacrifice is the most tax-efficient way most employees can pay into a pension, yet huge numbers of people who could use it do not. This guide explains how it works, exactly how much it saves at different salaries, and who should think twice.
What is salary sacrifice for pensions?
Pension salary sacrifice swaps part of your salary for an employer pension contribution, saving both income tax and National Insurance. For higher earners it can boost the amount invested by roughly 2 to 12% versus a normal contribution, depending on your tax band.
Salary sacrifice, sometimes called salary exchange, is an agreement with your employer to reduce your contractual salary, with the employer paying the given-up amount straight into your pension as an employer contribution.
Because your salary is lower, you pay less income tax and less National Insurance. A normal pension contribution gets income tax relief but not NI relief; sacrifice gets both. That NI saving is the entire advantage, and for higher earners it compounds meaningfully over a career.
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How salary sacrifice works: the employer and employee NI saving
Two savings happen at once. You save employee National Insurance on the sacrificed amount, currently 8% on earnings between the NI thresholds and 2% above the upper earnings limit. Your employer saves employer National Insurance at 15% on the same amount.
The employer’s saving belongs to the employer, but many pass some or all of it into your pension as an extra contribution. Whether yours does is worth asking, because a full pass-on turns a good deal into an exceptional one: every £1,000 sacrificed can arrive in the pension as £1,150.
Worked examples at £60,000, £100,000 and £125,000
The table compares a £10,000 gross pension contribution made normally versus by salary sacrifice, using 2026/27 rates. Figures are approximate and assume the employer does not pass on their NI saving; the final column shows the extra if they pass it all on.
Salary | Income tax relief (both methods) | Employee NI saved (sacrifice only) | Effective boost vs normal contribution | If employer passes on 15% NI |
£60,000 | £4,000 (40%) | £200 (2%) | around 2% | +£1,500 into pension |
£100,000 | up to £6,000 (60% effective in the taper band) | £200 (2%) | around 2%, on top of 60% relief | +£1,500 into pension |
£125,000 | up to £6,000 (60% effective in the taper band) | £200 (2%) | around 2%, on top of 60% relief | +£1,500 into pension |
Below the upper earnings limit the employee NI saving is 8%, not 2%, so a basic rate earner sacrificing £5,000 keeps an extra £400 of NI that a normal contribution would lose. The boost is real at every level; it is simply largest where the 60% band and employer pass-on stack together.
Salary sacrifice and the 60% tax trap
For earners between £100,000 and £125,140, sacrifice does double duty. It funds the pension with full NI efficiency and reduces adjusted net income, clawing back the personal allowance that the taper removes. Effective relief on contributions in that band reaches around 60% before NI savings. We cover the mechanics in full in our guide to the 60% tax trap.
If that describes your payslip, our guide for HENRYs sets out the wider planning picture for high earners.
Pros and cons: who salary sacrifice suits
The advantages are straightforward:
- NI savings on top of income tax relief, at every earnings level.
- Possible employer NI pass-on, boosting contributions further.
- Automatic discipline: the money never touches your bank account.
The trade-offs need thought:
- Your contractual salary is genuinely lower, which can affect anything calculated from it.
- You cannot sacrifice below the National Minimum Wage.
- Not every employer offers it, and scheme rules on changing the amount vary.
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The impact on your mortgage, benefits and life cover
Because sacrifice reduces your headline salary, it can affect calculations that use it. Mortgage lenders assess affordability on your reduced salary, although many will take regular pension contributions into account if you explain them; if you are about to apply for a mortgage, timing matters.
Salary-linked benefits can also be affected: death in service cover, sick pay, maternity pay and statutory payments may all be based on the lower figure. Good employers operate a notional or reference salary for these purposes, so check before you sign. Earnings-related state benefits can be affected if sacrifice takes you below relevant thresholds, which mainly concerns lower earners.
How much can you sacrifice? The annual allowance and tapering
The pension annual allowance is £60,000 for most people, covering all contributions from you and your employer, including sacrificed amounts. Unused allowance from the previous three tax years can be carried forward.
Very high earners face the tapered annual allowance, which reduces the £60,000 limit once income exceeds the taper thresholds, potentially down to £10,000. The taper calculation is intricate and mistakes trigger tax charges, so anyone earning around £200,000 or more should take advice before large contributions [VERIFY: current taper thresholds, GOV.UK].
Structuring contributions around these limits is core work for our pension planning and retirement service.
Frequently Asked Questions
Is salary sacrifice worth it?
How much can I salary sacrifice into my pension?
Does salary sacrifice affect my mortgage application?
Does salary sacrifice reduce my State Pension?
Small change to your payslip, big change to your pension
Salary sacrifice does not require investment skill or market timing. It is a structural improvement: the same money, routed more efficiently, compounding for decades.
If you want to check whether your scheme is set up efficiently, and how much sacrifice would save at your salary, get in touch with Ark Wealth Management.
This article is for information only and does not constitute personal financial or tax advice. Tax treatment depends on individual circumstances and may change. Figures are approximate and based on current rates and thresholds. Ark Wealth Management is an Appointed Representative of Quilter Financial Services Ltd and is authorised and regulated by the Financial Conduct Authority.
Sources Used
- GOV.UK, Salary sacrifice for employers (scheme rules)
- GOV.UK, Rates and thresholds for employers (National Insurance)
- GOV.UK, Tax on your private pension contributions (annual allowance and taper)
- MoneyHelper, Salary sacrifice and your pension
- [VERIFY] Current tapered annual allowance thresholds and 2026/27 NI rates page at publication.
Ready to move forward with confidence?
We would be pleased to learn more about your plans and show how we can support you.