Key facts at a glance
EV BiK rate 2026/27
4%
of P11D value, zero-emission
Employer NI
15%
not the outdated 13.8% figure
NMW floor (21+)
£12.71
per hour, from April 2026
Salary sacrifice into a pension and salary sacrifice into an electric vehicle lease work the same way at the mechanical level: both reduce your gross pay before tax and National Insurance are calculated, so you never pay income tax or employee NI on the amount you give up. The difference shows up after that. A pension contribution isn't a taxable benefit, so the full amount lands in your pot untouched. An EV, even one funded entirely through salary sacrifice, is still a company car for tax purposes, and HMRC charges Benefit-in-Kind tax on 4% of its P11D value at your marginal income tax rate for 2026/27, clawing back part of what you saved.
Run the numbers on a £65,000 salary sacrificing £500/month into each scheme: pension sacrifice puts the full £6,000 a year into your pension for a real take-home cost of £3,480, while the same amount sacrificed into a £35,000 P11D EV lease costs £4,040once the BiK charge is deducted. Pension sacrifice wins pound-for-pound almost every time, because it has no Benefit-in-Kind offset. That doesn't mean EV salary sacrifice is a bad deal, it's one of the cheapest ways to run a car in the UK, it just means the two schemes solve different problems. This piece walks through the mechanics, a full worked comparison, the £100,000-£125,140 tax trap angle, and the National Minimum Wage rule that can rule either scheme out entirely.
Run your own salary, sacrifice amounts, and EV value through the numbers.
Open the CalculatorHow pension and EV salary sacrifice actually work
Salary sacrifice is a formal contractual change to your employment terms, not a payroll deduction you can opt into casually. You agree with your employer to reduce your contractual gross salary by a set amount, and in exchange your employer either pays that amount into your pension or provides you with a leased EV. Because your contractual salary is genuinely lower, HMRC treats the sacrificed amount as never having been your income in the first place: no income tax, no employee National Insurance, and no employer National Insurance (currently 15%, above the £5,000 secondary threshold) applies to it.
For a pension, that's effectively the whole story. The sacrificed amount, plus whatever your employer contributes, goes into your pension pot with zero tax leakage on the way in. It only becomes taxable decades later, when you draw it down in retirement, and even then 25% typically comes out tax-free.
For an EV, there's an extra step. A company car, even one you're only receiving because you sacrificed salary for it, is a Benefit-in-Kind under UK tax law. HMRC calculates a notional annual value for that benefit, the car's P11D value (list price including delivery and factory options) multiplied by an "appropriate percentage" that depends on the car's emissions, and adds that value to your taxable income. For a fully electric, zero-emission car in 2026/27, that appropriate percentage is 4%, confirmed at the November 2025 Autumn Budget as the first step in a schedule that climbs to 5% in 2027/28, 7% in 2028/29, and 9% in 2029/30. Petrol and diesel cars sit in a much higher 17-37% band, which is why EV salary sacrifice remains dramatically cheaper than a combustion-engine equivalent even as the EV rate rises.
So both schemes save you tax and NI on the sacrificed amount up front. Only the EV scheme then adds a chunk of it back as a Benefit-in-Kind tax charge. That single structural difference is the entire reason pension sacrifice comes out ahead pound-for-pound in almost every scenario.
Tax-efficiency comparison matrix
| Feature | Pension sacrifice | EV lease sacrifice |
|---|---|---|
| Income tax saved on sacrifice | Yes, full marginal rate | Yes, full marginal rate |
| Employee NI saved on sacrifice | Yes | Yes |
| Employer NI saved (15%) | Yes, employer keeps it unless boosted | Yes, employer keeps it |
| Benefit-in-Kind charge | None | 4% of P11D value, taxed at your marginal rate |
| Uses pension Annual Allowance | Yes, counts toward £60,000 cap | No |
| Helps the £100k-£125,140 taper | Yes, reduces adjusted net income | No effect on the taper |
| Reverses if you leave the scheme | No, contribution is permanent | Usually, lease ends with employment |
| Subject to NMW floor rule | Yes | Yes |
Worked example: £65,000 salary, higher-rate taxpayer
At £65,000, you're a higher-rate taxpayer (40% income tax, 2% NI above the £50,270 Upper Earnings Limit), sacrificing £500/month into each scheme. The EV has a £35,000 P11D value.
| Line item | Pension | EV lease |
|---|---|---|
| Annual sacrifice | £6,000 | £6,000 |
| Income tax saved | £2,400 | £2,400 |
| Employee NI saved | £120 | £120 |
| Benefit-in-Kind tax | £0 | £560 |
| Real take-home cost | £3,480 | £4,040 |
| What you actually get | £6,000 in pension | £6,000 lease value |
Every £1 sacrificed into the pension costs about 58p of real take-home. The same £1 sacrificed into the EV lease costs about 67p, still a genuine saving versus paying for the same car with taxed income, but a smaller one, because £560 of the saving gets clawed back as Benefit-in-Kind tax.
Earning £100,000-£125,140? Pension sacrifice is worth more here than anywhere else
Between £100,000 and £125,140, HMRC withdraws your Personal Allowance at £1 for every £2 you earn above £100,000, on top of the ordinary income tax and NI you already pay. The effective marginal rate on income in this band runs close to 60% before NI, and above 60% once NI is added, well above the 42% rate that applies just below £100,000. Our full guide to this band, linked below, covers exactly how the taper works and what it means for a raise or bonus that lands you inside it.
A £110,000 salary sacrificing £10,000 into a pension, enough to bring adjusted net income back down to exactly £100,000, restores the full £12,570 Personal Allowance on top of the direct income tax and NI saving. Run through the live tax engine, that £10,000 sacrifice costs only £3,800 in real take-home, an effective saving of roughly 62% on the sacrificed amount, because you're saving tax and NI on the pound itself and restoring allowance you'd otherwise lose.
EV sacrifice gets no equivalent boost in this band. The Benefit-in-Kind charge is calculated the same way regardless of where your salary sits relative to £100,000, so it doesn't interact with the taper at all. If you're in this band and have to choose where to direct a limited sacrifice budget, pension sacrifice is the clear priority.
The National Minimum Wage guardrail that limits both schemes
Salary sacrifice cannot legally take your contractual cash pay below the National Minimum Wage or National Living Wage for your age band, and this applies identically to pension sacrifice, EV lease sacrifice, cycle-to-work, and every other sacrifice arrangement. From 1 April 2026, that floor is £12.71/hour for workers aged 21 and over, up from £12.21/hour in 2025/26.
HMRC tests this on your actual hourly cash pay after the sacrifice, based on your contracted hours, not your headline annual salary. A £30,000 salary on a standard 37.5-hour week works out to roughly £15.38/hour before any sacrifice, plenty of headroom. But someone on a lower salary, working longer hours, or already running one sacrifice scheme can hit the floor faster than expected once a second sacrifice is layered on top. This isn't a soft guideline: an employer that runs a sacrifice arrangement below the NMW floor is in breach of the law and can face penalties, so responsible employers build an automatic floor check into their scheme rules, and you should expect payroll or HR to decline a sacrifice request that would breach it.
If you're close to the floor, the practical fix is usually a smaller sacrifice amount, not abandoning the scheme entirely. Run your own contracted hours and salary through the calculator above to see exactly where you land.
Which scheme to prioritise: a quick checklist
1. Check the NMW floor first. If either sacrifice amount would take your hourly cash pay below £12.71/hour, that scheme isn't available to you at that level, full stop. Confirm this before comparing anything else.
2. If you're between £100,000 and £125,140, prioritise pension sacrifice.It's the only lever here that restores your Personal Allowance, and the effective saving in this band is higher than anywhere else on the income scale.
3. If you need a car regardless, EV sacrifice is usually still worth it. Even with the Benefit-in-Kind charge, sacrificing for an EV is typically far cheaper than leasing or buying the same car with post-tax income, and insurance, servicing, and sometimes charging come bundled into one deduction.
4. If you're not maximising pension contributions and don't need a car, pension sacrifice wins on pure value. No Benefit-in-Kind charge means none of the saving gets clawed back, and the money compounds tax-free for decades.
5. Watch your Annual Allowance. Pension sacrifice counts toward the £60,000Annual Allowance; EV sacrifice doesn't. If you're already close to the cap through other pension contributions, that alone might tip the decision toward the EV scheme.
6. You don't have to choose only one. Many employers let you run both schemes simultaneously, provided the combined sacrifice still clears the NMW floor. Model your specific salary and both amounts together using the calculator above rather than assuming either scheme in isolation.
A note on employer National Insurance
Employer NI is 15% for 2026/27, above the £5,000 secondary threshold, the rate set at the April 2025 Budget. A lot of salary sacrifice guides, spreadsheets, and even some employer scheme documents still quote 13.8%, the rate that applied before that change. It doesn't change what lands in your take-home pay directly, since the employer NI saving is your employer's money either way, but it does affect any figure your employer quotes you for the value of a potential "NI boost" back into your pension, so it's worth knowing which rate any number you're given is actually built on.
See your own pension vs EV numbers broken down
Enter your salary, both sacrifice amounts, and your EV's P11D value to see the exact tax and NI saved, the Benefit-in-Kind claw-back, and whether either amount breaches the NMW floor.
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Frequently asked questions
Should I choose pension salary sacrifice or an EV lease scheme?
Pound-for-pound of take-home given up, pension sacrifice delivers more value, because it carries no Benefit-in-Kind charge and the full sacrificed amount lands in your pension. An EV lease sacrifice also saves income tax and employee National Insurance, but the car remains a taxable benefit: HMRC charges Benefit-in-Kind on 4% of the vehicle's P11D value at your marginal income tax rate for 2026/27, which claws back part of the saving. That doesn't make EV salary sacrifice a bad idea, it's usually far cheaper than leasing the same car with taxed income, but it's a cost-of-motoring decision, not a wealth-building one. If you're not already maximising pension contributions and retirement saving is the priority, pension sacrifice wins on the numbers. If you need a car regardless, EV salary sacrifice is close to the cheapest way to get one in the UK right now.
Is employer National Insurance really 15%? I keep seeing 13.8% quoted.
15%, for the 2026/27 tax year, above the £5,000 secondary threshold. That's the rate set at the April 2025 Budget. 13.8% was the rate before that change and still circulates in older guides, some third-party salary sacrifice calculators, and even a few employer scheme documents that haven't been updated. If you're running your own numbers anywhere else, check which rate the tool is actually using before you trust the output.
What Benefit-in-Kind rate applies to a fully electric company car in 2026/27?
4% of the car's P11D value, the list price including delivery and any factory-fitted options, for a fully electric, zero-emission vehicle. This was confirmed at the November 2025 Autumn Budget as part of a scheduled step-up: 4% in 2026/27, rising to 5% in 2027/28, 7% in 2028/29, and 9% in 2029/30. Petrol and diesel cars sit far higher, in a 17-37% band depending on CO2 emissions, so an EV remains dramatically cheaper to run as a company car even as the rate climbs. This schedule is correct as of the November 2025 Budget; check gov.uk's current company car tax tables before committing to a multi-year lease, since rates can be revised at a future fiscal event.
Can salary sacrifice legally take my pay below minimum wage?
No, not for pension sacrifice, an EV lease, cycle-to-work, or any other scheme. HMRC tests National Minimum Wage compliance on your actual contractual cash pay after the sacrifice is applied, not your headline salary. If a sacrifice amount would take your hourly cash pay below the National Living Wage, £12.71/hour for workers aged 21 and over from 1 April 2026, your employer cannot legally offer you that level of sacrifice, however small the amount. If your salary is close to that floor, this rule can rule out sacrifice schemes entirely rather than just limiting the amount.
Do I get any of the employer NI saving on my pension sacrifice?
By default, no. Your employer keeps the full 15% employer NI saving on the amount you sacrifice, since it's no longer paying you that slice of salary as cash. Some employers choose to pass some or all of that saving back into your pension as an extra contribution, sometimes called an "NI rebate" or "NI boost", as a goodwill enhancement to the scheme. There's no legal requirement for them to do this, so check your own scheme documentation rather than assuming it applies to you.
Does an EV salary sacrifice scheme use up my pension Annual Allowance?
No. The pension Annual Allowance, £60,000 for 2026/27, only limits contributions into a registered pension scheme. An EV lease sacrifice reduces your gross salary in exchange for a car benefit, not a pension contribution, so it has no bearing on your Annual Allowance. The two schemes interact only through your gross salary: running both at once reduces the salary figure you're left with, which can matter for mortgage affordability assessments that typically use post-sacrifice salary.
I'm earning between £100,000 and £125,140. Does that change which scheme wins?
It makes pension sacrifice significantly more valuable, and it's the one lever in this comparison that can pull you out of the band entirely. In this range, every extra pound of income effectively costs you close to 60p in income tax before National Insurance is even added, because HMRC is both taxing the pound itself at the higher rate and withdrawing a slice of your tax-free Personal Allowance at the same time. A pension sacrifice large enough to bring your adjusted net income back to £100,000 or below restores that allowance on top of the direct saving, which is why sacrifice amounts in this band tend to be unusually efficient. EV sacrifice gets no special boost here since the BiK charge doesn't interact with the Personal Allowance taper the same way. See our dedicated guide to this band, linked below, for the full mechanics of how the taper itself works.
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