Salary Sacrifice Calculator 2026/27
Find the real net cost of salary sacrifice after Income Tax and National Insurance savings. Model pension contributions, electric cars, and cycle to work — and see whether your employer passes on their NI saving too.
What Salary Sacrifice Actually Does to Your Pay — and Why the Headline Figure Misleads
Salary sacrifice works by reducing your contractual gross salary before any deductions are applied. Because Income Tax and National Insurance are both calculated on this lower figure, you pay less of both. The benefit — a pension contribution, an electric vehicle, a bicycle — is provided by your employer instead.
The critical insight is that the gross sacrifice amount is not the cost to you. A £5,000 pension sacrifice from a basic-rate salary costs £3,600 in reduced take-home pay — the remaining £1,400 comes from tax and NI you no longer pay. At the higher rate, the same £5,000 sacrifice costs only £2,900. Most employees never calculate this correctly and therefore underestimate both the value of existing schemes and the scope to increase contributions.
| Gross sacrifice | Tax rate band | IT saving | Employee NI saving | Total saving | Net cost to you |
|---|---|---|---|---|---|
| £1,000 | Basic (20% IT + 8% NI) | £200 | £80 | £280 | £720 |
| £1,000 | Higher (40% IT + 2% NI) | £400 | £20 | £420 | £580 |
| £1,000 | PA taper (60% eff. IT + 2% NI) | £600 | £20 | £620 | £380 |
| £5,000 | Basic (20% IT + 8% NI) | £1,000 | £400 | £1,400 | £3,600 |
| £5,000 | Higher (40% IT + 2% NI) | £2,000 | £100 | £2,100 | £2,900 |
| £10,000 | Mixed (spans basic→higher) | ~£3,200 | ~£200 | ~£3,400 | ~£6,600 |
The Employer NI Saving: The Part Most Calculators Don't Show
Your employer also pays National Insurance — at 13.8% on salaries above £5,000/year (the Secondary Threshold for 2026/27). When you sacrifice salary, your employer's NI liability falls by 13.8% of the sacrificed amount. On a £5,000 sacrifice, that is a £690 saving for the employer — purely because you agreed to a lower contractual salary.
Whether you benefit from this depends entirely on your employer's scheme rules:
Ask your HR or payroll team explicitly: "Does the company pass on any of the Employer NI saving from salary sacrifice into the pension?" Many employees never ask — and many employers who do pass it on fail to communicate this clearly. The calculator above lets you model all three scenarios.
Three Salary Sacrifice Schemes: Pension, Electric Vehicle, Cycle to Work
All three work through the same tax mechanism, but differ significantly in the benefit received, practical limits, and risk profile. Choosing between them — or combining them — requires understanding each scheme's ceiling, real-world value, and the impact on your other financial metrics.
Scheme A — Pension contributions
The most financially powerful use of salary sacrifice for most employees. The tax saving is permanent — you receive more pension for a lower net cost. There is no cap on the percentage of salary you can sacrifice (though total pension contributions must not exceed the Annual Allowance of £60,000/year, or 100% of earnings if lower). The pension pot grows free of Income Tax and Capital Gains Tax; only withdrawals above the 25% tax-free lump sum are taxed.
The "38.9% instant uplift" figure deserves explanation: for every £1 of take-home pay you forgo, £1.39 enters your pension. No investment can legally guarantee this kind of starting return. This is why pensions via salary sacrifice are generally the first place financial planners direct spare earnings — before ISAs, before overpaying a mortgage, and certainly before holding cash.
For higher-rate taxpayers (earnings above £50,270), the instant uplift rises to 72.4%: a £1,000 net cost delivers £1,724 of pension contribution. At the Personal Allowance taper zone (£100k–£125k), where effective IT rate is 60%, the uplift exceeds 160% on net cost.
Scheme B — Electric vehicle (company car salary sacrifice)
Electric vehicles under salary sacrifice attract a Benefit-in-Kind (BIK) rate of just 3% for 2026/27 — far below petrol and diesel equivalents (which run at 20–37% BIK). This makes EV salary sacrifice uniquely tax-efficient compared to any other company car arrangement.
The BIK tax adds back some cost but at 3% on the P11D value it remains small relative to the IT and NI savings. The real-world comparison is against leasing the same car privately from net pay: that £5,400/year lease costs £5,400 from your bank account. Via sacrifice it costs £4,098 — a saving of £1,302/year at the basic rate, and more at higher rates. At the higher rate, the same scheme saves £2,007/year.
Scheme C — Cycle to Work
Cycle to Work allows salary sacrifice for a bicycle and equipment, up to a hire period of 12–18 months after which ownership typically transfers to the employee for a small residual payment. From 2019, the £1,000 cap was removed — you can now sacrifice up to the value of the cycle, though most schemes cap at £5,000 for standard bikes and higher for adapted cycles for disabled employees.
Cycle to Work produces the smallest absolute saving of the three schemes — but has no meaningful tax risk (no BIK, no Annual Allowance) and the benefit is tangible and immediate. For commuters who would buy a bike anyway, the 21–28% effective discount is straightforward to capture. The scheme is stackable: you can run it alongside a pension sacrifice and EV scheme simultaneously, provided your combined sacrifice does not push your contractual salary below the National Living Wage.
Five Side Effects of Salary Sacrifice You Need to Know Before You Sign Up
Salary sacrifice is not universally advantageous. Because it reduces your contractual gross pay, several entitlements and calculations that reference earnings are affected. These are not reasons to avoid sacrifice — but they must be modelled before committing, especially at higher sacrifice rates.
The £100,000 Strategy: Why Pension Sacrifice Is Uniquely Powerful at This Level
Between £100,000 and £125,140, the Personal Allowance is withdrawn at a rate of £1 for every £2 earned above £100,000. The result is an effective Income Tax rate of 60% on that slice of income — plus 2% NI, making the combined marginal rate 62%. This is higher than the headline 45% Additional Rate applying above £125,140.
Pension salary sacrifice is the primary tool for navigating this trap legally. Every £1 of gross salary sacrificed into a pension reduces your adjusted net income by £1 — potentially restoring the Personal Allowance on a pound-for-pound basis.
The £10,000 sacrifice costs £3,800 in reduced take-home pay and delivers £10,000 into the pension — an effective uplift of 163% on net cost. This is the most efficient use of salary sacrifice available in the UK tax system, and it is accessible to anyone earning between £100,000 and £125,140 with an employer pension scheme that accepts sacrifice contributions.
To bring income below £100,000 entirely — restoring the full Personal Allowance and removing any PA taper — requires sacrificing the full amount above £100,000. On a £115,000 salary, that means £15,000 of sacrifice, which at 62% effective marginal saving costs only £5,700 in reduced take-home. An Annual Allowance of £60,000 means this is achievable for most earners in this range if the employer scheme allows it.
What Changed for Salary Sacrifice in 2026/27
| Parameter | 2025/26 | 2026/27 | Effect on sacrifice planning |
|---|---|---|---|
| Pension Annual Allowance | £60,000 | £60,000 | No change — ceiling unchanged |
| Employer NI rate | 13.8% | 15.0% | Employer NI saving on each £1,000 sacrifice rises from £138 to £150 — stronger incentive for employers to share the saving |
| Employer NI Secondary Threshold | £9,100/yr | £5,000/yr | Employer NI now applies from a lower salary floor — employers pay more NI overall, making sacrifice even more attractive to offer |
| National Living Wage | £11.44/hr | £12.21/hr | Higher NLW floor restricts sacrifice capacity for lower earners — minimum salary of £23,810 before any sacrifice can be applied |
| EV BIK rate | 2% | 3% | EV scheme BIK tax slightly higher — but still far below petrol/diesel BIK rates of 20–37% |
| PA taper zone | £100k–£125,140 | £100k–£125,140 | Unchanged — pension sacrifice in this band still delivers 62% effective marginal saving |
The most significant change for 2026/27 is the rise in Employer NI from 13.8% to 15.0% alongside the drop in the Secondary Threshold from £9,100 to £5,000. Together, these increase employer NI costs substantially — making salary sacrifice more valuable to offer from an employer's perspective. Employees are in a better negotiating position to request that employers share or pass on more of the NI saving, particularly in schemes being set up or renegotiated this year.
Frequently Asked Questions
Is salary sacrifice always worth doing?
For most employees, yes — the tax and NI savings are immediate and guaranteed. The exceptions are situations where the reduction in contractual salary matters more than the saving: if you are in the SMP qualifying period, applying for a mortgage, or if your salary is close to the National Living Wage floor. Model the specific side effects using the scenarios in the content above before committing, especially at high sacrifice rates.
How is salary sacrifice different from a personal pension contribution?
A personal pension contribution (relief at source) is made from your net pay — your employer deducts it after tax and NI have been calculated. Your pension provider claims 20% basic-rate tax relief from HMRC and adds it to the pot. Higher-rate relief must be claimed separately via Self Assessment. Salary sacrifice, by contrast, reduces your gross pay before tax and NI run — so you save NI automatically (8% or 2% depending on band) in addition to the tax relief. Salary sacrifice is typically worth £80–£140 more per £1,000 contributed at the basic rate than relief at source.
What is the maximum I can sacrifice into my pension in 2026/27?
The Annual Allowance is the lower of £60,000 or 100% of your earnings. Total pension input (your contributions plus employer contributions) must not exceed this. Unused Annual Allowance from the three preceding years (2023/24, 2024/25, 2025/26) can be carried forward if you were a scheme member in those years. The Money Purchase Annual Allowance (£10,000) applies if you have already flexibly accessed any defined contribution pension — this limits future contributions significantly. Use the Take-Home Pay Calculator to verify the net cost of any proposed contribution level.
Can I change or stop my salary sacrifice arrangement mid-year?
This depends on your employer's scheme rules. Salary sacrifice is a contractual change — you formally agree to receive lower pay in exchange for the benefit. Most schemes allow changes at a fixed point (e.g. annually, or on a life event such as marriage, birth of a child, or house purchase). Some employers allow monthly changes; others only allow annual amendments. Check your scheme terms before starting, particularly if your circumstances are likely to change within the year.
Does salary sacrifice affect my State Pension entitlement?
Salary sacrifice reduces your National Insurance contributions — and State Pension entitlement is built on qualifying NI years. However, you only need 35 qualifying years for the full new State Pension, and NI is still payable on your post-sacrifice salary (which remains above the Lower Earnings Limit of £6,396 in almost all cases). In practice, salary sacrifice at normal employment rates does not reduce State Pension entitlement because the reduced NI still counts as a qualifying year — but check if you are close to retirement and have fewer than 35 qualifying years.
Can I salary sacrifice to reduce my income below £100,000 and restore my Personal Allowance?
Yes — this is one of the most powerful uses of pension salary sacrifice. Every pound sacrificed reduces your adjusted net income by one pound, restoring the Personal Allowance at a rate of 50p per pound of sacrifice above £100,000. Sacrificing exactly the amount above £100,000 fully restores the £12,570 allowance and exits the 62% effective marginal rate band entirely. At a £110,000 salary, a £10,000 sacrifice saves £6,200 in tax and NI — so the £10,000 pension contribution costs only £3,800 net.
Disclaimer: Results are estimates based on published HMRC rates for 2026/27. EV BIK calculations use the 3% rate applicable in 2026/27. Pension Annual Allowance checks should be confirmed with your pension provider or a regulated financial adviser. For personalised pension advice, consult an FCA-authorised adviser.