Written and reviewed by James Whitfield · Updated for 2026/27 · Editorial standards · Methodology
How EV salary sacrifice works in the UK, the real monthly net cost, and what to check before signing up.
Electric car salary sacrifice is an arrangement where your employer leases a car and you give up part of your gross salary in exchange for access to it. The car becomes a company benefit, and instead of paying for it from your net (after-tax) pay, the cost comes out before income tax and NI are calculated. This means the effective cost to you is lower than the headline lease figure.
The scheme works because of benefit-in-kind (BIK) tax rules. Normally, using a company car creates a taxable benefit based on the car's list price and a percentage set by its CO2 emissions. For zero-emission electric vehicles, the BIK percentage for 2026/27 is just 2% of the car's P11D value. This is extraordinarily low compared to petrol or diesel company cars, which attract BIK percentages of 20–37% depending on emissions. The 2% rate is confirmed to remain until at least 2029/30.
You pay BIK tax on the 2% figure. For a £35,000 electric car, the benefit value is 2% × £35,000 = £700 per year. A basic-rate taxpayer pays 20% of £700 = £140/year in tax, or £11.67/month. A higher-rate taxpayer pays 40% × £700 = £280/year, or £23.33/month. These are genuinely small numbers compared to the tax cost of any petrol car at the same price.
Take a £35,000 electric car with a £600/month lease. Via salary sacrifice, you give up £600 gross per month. If you are a basic-rate taxpayer, the real cost to your net pay is roughly £600 × (1 − 0.28) = £432/month (saving 20% income tax + 8% NI). Add the BIK tax of ~£12/month and your total monthly net cost is around £444. The lease company includes insurance, maintenance and servicing in most schemes, so that £444 typically covers everything.
Leasing the same car privately would cost around £550–650/month after tax (using net, post-tax income), and you would need to pay for insurance and maintenance separately. The salary sacrifice route is typically £150–200/month cheaper all-in for a basic-rate taxpayer. For higher-rate taxpayers, the saving is larger: giving up £600 gross costs roughly £600 × (1 − 0.42) = £348/month net, plus £23/month BIK = £371/month total, a saving of £200–280/month versus private leasing.
Employer NI savings are part of the picture too. Employers save 15% on the portion of salary sacrificed, which many pass back into the scheme as a sweetened lease rate or as a direct contribution. Not all employers do this, so it is worth asking before signing up.
Salary sacrifice reduces your contractual gross salary, which matters in several places. Mortgage lenders assess affordability based on salary, and some lenders use the sacrificed salary (the lower figure on your payslip) rather than the pre-sacrifice amount. If you are planning to apply for a mortgage, check with your broker whether the sacrifice will affect your borrowing capacity before committing.
Statutory payments, like Statutory Maternity Pay and Statutory Sick Pay, are calculated on your actual lower contractual salary if salary sacrifice reduces you below the qualifying earnings threshold. This is unlikely to be an issue at typical sacrifice levels for a car, but is worth understanding if you think you might take parental leave during the scheme period.
Early termination of the lease if you leave your employer can result in significant charges, sometimes several thousand pounds. The key question is what happens to the car agreement if your employment ends. Some schemes have employer exit provisions; others pass the remaining cost directly to the employee. Read the termination clause carefully and treat it as a long-term commitment rather than a flexible monthly arrangement.
Current tax-year thresholds used across this guide and calculator.
Yes. Use the scenario links in this guide to open prefilled states, then adjust salary, region, loan and pension settings.
Yes. Core content is rendered in HTML and linked to salary/city/tool pages for crawlable internal navigation.
Tax region, tax code, student loan plan, pension contribution and salary sacrifice are the key assumptions to check first.