The salary sacrifice EV 2028 question for higher-rate taxpayers is easy to get wrong: lock a four-year payroll lease now while company-car tax on electric cars is still low, or keep the term short as the benefit-in-kind rate climbs to the end of the decade? Signing a longer deal does not freeze your tax rate, but it can still be the cheaper, calmer route. This guide walks the worked maths over two, three and four-year terms.
What real owners say (CDE data)
CDE reviewed owner and employee discussion on PistonHeads and MoneySavingExpert alongside MoneyHelper and HMRC company-car guidance (June 2026), reading how people actually weigh term length against the rising BiK schedule.
- Most-praised aspects: the size of the National Insurance and income-tax saving for 40% and 45% payers; the simplicity of one fixed payroll deduction; insurance, servicing and tyres usually bundled into the rental.
- Most-criticised aspects: confusion over whether the BiK rate is “locked” at signing (it is not); early-exit fees if you leave the employer mid-term; charging and home-electricity costs not always included.
- Reliability signal: the recurring theme is that the tax case survives the rate rises comfortably, because even a 9% EV BiK in 2029/30 sits far below the 37%-plus appropriate percentage a petrol or diesel equivalent attracts.
How BiK is applied across a multi-year contract
This is the misconception that trips up most people pricing a salary sacrifice EV 2028 deal. When you sign, the lease rental is fixed for the term. The benefit-in-kind percentage is not. Your taxable benefit is recalculated every tax year using the appropriate percentage HMRC has published for that year, multiplied by the car’s P11D value, then taxed at your marginal rate. So a four-year contract starting in 2026/27 runs through four different BiK percentages, and your monthly tax cost rises a little each April even though the rental never moves.
Per HMRC’s published appropriate percentages for 2025/26 to 2027/28 and the 2028/29 and 2029/30 rates set at Autumn Budget 2024 (both checked 7 June 2026), the zero-emission EV rate is 4% in 2026/27, 5% in 2027/28, then rises by 2 percentage points a year to 7% in 2028/29 and 9% in 2029/30. What you do lock by signing is the rental, the vehicle and your access to those still-low rates, not the rate itself.
The EV BiK schedule to 2029/30, and why it still wins
The climb looks alarming written as a sequence: 4%, 5%, 7%, 9%. In cash terms it is mild. Take a £60,000 P11D electric saloon. At 4% the taxable benefit is £2,400; a 40% taxpayer pays £960 a year, or £80 a month. By 2029/30 at 9% the benefit is £5,400 and the same taxpayer pays £2,160 a year, around £180 a month. That increase matters, but it is the difference between a small and a slightly larger tax bill on a car you are already getting at a steep discount through payroll. The reason the maths holds is the gap to combustion: a petrol equivalent on the same P11D would sit near the 37% appropriate percentage cap from day one.
If you want the headline numbers in isolation, our salary sacrifice EV and the 60% tax trap piece shows how the deduction works for earners caught in the £100,000-£125,140 personal-allowance taper, where the effective relief is highest of all. The schedule above applies identically whatever band you fall in; only your marginal rate changes the cash figure.
Salary sacrifice EV 2028 worked cost: 2, 3 and 4-year terms
Here is the trade-off made concrete. We use a £60,000 P11D EV, a higher-rate (40%) taxpayer, and an illustrative gross sacrifice of £700 a month that already bundles insurance, maintenance and tyres (a typical scheme structure; your provider’s quote will differ). The income-tax and National Insurance relief on the sacrifice is roughly £700 x 42% (40% tax plus 2% NI above the upper earnings limit), about £294 a month, so the net pay reduction before BiK is around £406. We then add the BiK tax for each tax year the contract spans, reading every rate from the HMRC pages cited above. To keep the comparison clean we align each term to a 6 April tax-year start, so a 24-month term maps to two whole tax years; a real mid-year start clips a little of the next year’s rate, nudging the averages but not the conclusion.
| Tax year (contract spans) | EV BiK rate | Taxable benefit (£60k P11D) | BiK tax at 40%/yr | BiK tax per month |
|---|---|---|---|---|
| 2026/27 | 4% | £2,400 | £960 | £80 |
| 2027/28 | 5% | £3,000 | £1,200 | £100 |
| 2028/29 | 7% | £4,200 | £1,680 | £140 |
| 2029/30 | 9% | £5,400 | £2,160 | £180 |
A 24-month term signed now spans 2026/27 and 2027/28, so it only ever sees the 4% and 5% rates: average BiK tax of roughly £90 a month, net all-in cost around £496 a month. A 36-month term reaches into 2028/29 at 7%, lifting the average to about £107. A 48-month term runs all the way to the 9% year, averaging about £125 a month of BiK tax, net all-in near £531. The four-year deal is the most expensive on average BiK, by design, because it carries the high-rate years.
So why would anyone lock the longer term?
Because the average-BiK figure is only half the picture. A 24-month term ends in 2028, when you re-lease at whatever rental the market offers then, almost certainly higher than today’s, and you re-enter at the 7% BiK year with no low-rate years left to enjoy. The shorter term wins on average BiK precisely because it dodges the expensive years; but you do not escape them, you just meet them on your next contract at a higher starting rental. Lock a 48-month deal now and you capture two genuinely cheap BiK years (4% and 5%) at today’s rental, then ride the 7% and 9% years on a rate that is still far below combustion.
The longer term also smooths budgeting: one fixed rental for four years, no re-quote risk, no gap in cover. If you are comparing this against simply funding a car yourself, our breakdown of salary sacrifice versus a car allowance for a higher-rate EV buyer shows the payroll route usually nets cheaper for 40% and 45% payers even after the BiK rises, and our business contract hire versus personal lease comparison covers the company-funded alternatives.
The real risk of a four-year term: leaving your employer
The danger in a longer salary sacrifice deal is not the tax schedule, it is your job. Salary sacrifice runs through your employer’s payroll, so if you resign, are made redundant, or go on extended unpaid leave, the arrangement usually ends and the car has to go back. Most schemes then charge an early-termination fee, often several months of rental, unless the provider offers protection cover. On a 48-month term you are exposed to that risk for twice as long as on a 24-month one. Before you sign a four-year deal, read the early-exit wording and check whether redundancy, resignation, maternity or long-term sick are treated differently.
This is the single biggest reason a shorter term can be the safer call for anyone whose role is uncertain. It is also why the bundled extras matter: our guide to salary sacrifice EV hidden costs covers the charging, tyre and exit charges that do not show up in the headline monthly figure, and the EV battery warranty position matters more on a longer hold.
How the scheme provider changes the term decision
Not every provider offers the same term flexibility or the same early-exit protection, and that shifts where the break-even sits. Some bundle redundancy and resignation cover into the rental, which materially de-risks a 48-month commitment; others charge it as an add-on or not at all. Term lengths on offer also vary, with 24, 36 and 48 months the common options and a few providers going to 60. Our comparison of Octopus EV versus Loveelectric sets out how two of the larger schemes differ on cover and inclusions, which is exactly the detail that decides whether locking longer is sensible for you.
According to MoneyHelper’s guidance on salary sacrifice, the arrangement also cannot take your gross pay below the National Minimum Wage, which can cap how much you sacrifice and therefore which cars and terms are open to you. Check that ceiling before you assume a flagship EV on a long term is affordable on payroll.
Who should take which term
If your job is secure and you want the calmest, most predictable cost, lock the 48-month term now: you bank two cheap BiK years at today’s rental and the later 7% and 9% years are still a bargain against any combustion alternative. If there is any real chance you will change employer in the next couple of years, take 24 or 36 months and accept the slightly higher per-month BiK in exchange for a shorter exposure to early-termination fees. Anyone close to the National Minimum Wage floor after sacrifice, or planning a career break, should lean short. The term is a risk decision first and a tax decision second.
Our take
Our view on the salary sacrifice EV 2028 term question: for a secure higher-rate or additional-rate employee, locking a four-year deal now is the stronger play, despite the BiK rising to 9% by 2029/30. You secure the cheapest tax years at today’s rental, you avoid re-quote risk into a likely dearer market, and the rate climb is small in cash terms against a tax saving that stays large. We would only steer you to a shorter 24 or 36-month term where job security is genuinely uncertain, because the true cost of a long sal-sac deal is the early-exit fee if you leave, not the published BiK. Whatever term you pick, get the early-termination wording in writing, confirm what the rental includes, and check your post-sacrifice pay stays above the National Minimum Wage. Boring paperwork, again, is what makes this work.
This article is general information on UK company-car tax and salary sacrifice, not personal tax or financial advice. Benefit-in-kind rates, tax bands and scheme rules change with each Budget; check current figures on gov.uk and speak to your employer, scheme provider or a qualified adviser before committing to a term.
Salary sacrifice EV term FAQ
Does signing a salary sacrifice deal lock my BiK rate?
Is a 4-year salary sacrifice EV still worth it with BiK rising to 9%?
What are the EV BiK rates from 2026 to 2030?
What happens to my salary sacrifice car if I leave my job?
Is a shorter term cheaper than a longer one?
Can salary sacrifice take my pay below minimum wage?
Where to check before you sign a term
- Confirm the current EV BiK rate for your start year on HMRC’s company-car tax pages.
- Read the early-termination and redundancy-cover wording in your scheme contract in full.
- Check whether insurance, servicing, tyres and a home or public charging allowance are included in the rental.
- Use MoneyHelper’s salary sacrifice guidance to confirm your post-sacrifice pay stays above the National Minimum Wage.
- Compare term lengths (24, 36, 48 months) on the same car and ask each provider for the early-exit fee schedule in writing.
- Browse more payroll-EV maths in the CDE electric vehicles section.
