Salary sacrifice for electric cars is one of the most generous tax perks available to UK employees right now. With Benefit-in-Kind (BiK) set at just 2% for battery electric vehicles until at least 2028, the combination of income tax savings, National Insurance savings, and employer contributions can slash your effective monthly cost by 30–50% compared to buying outright. Here's exactly how it works.
What Is a Salary Sacrifice Scheme?
A salary sacrifice arrangement lets you give up a portion of your gross salary in exchange for a non-cash benefit - in this case, a brand-new electric car including insurance, servicing, breakdown cover, and tyres. Because the sacrifice comes out of your pre-tax pay, you avoid:
- Income tax on the sacrificed amount (20%, 40%, or 45% depending on your band)
- Employee National Insurance (8% on earnings between £12,570 and £50,270; 2% above)
- Employer National Insurance (13.8% - many employers pass some or all of this saving back to you)
You pay Benefit-in-Kind tax on the car instead - and for a fully electric vehicle, that BiK rate is just 2% of the car's P11D value. For a modestly priced EV, this is a tiny figure.
How BiK Works for Electric vs Petrol Cars
| Fuel Type | BiK Rate 2026/27 | Tax on £40k car (40% taxpayer) | Tax on £40k car (20% taxpayer) |
|---|---|---|---|
| Battery Electric (BEV) | 2% | £320/yr | £160/yr |
| Plug-in Hybrid (PHEV, <50g CO2) | 8% | £1,280/yr | £640/yr |
| Petrol (130g CO2) | 28% | £4,480/yr | £2,240/yr |
| Diesel (150g CO2) | 33% | £5,280/yr | £2,640/yr |
P11D value used as £40,000 for illustration. BiK rates: HMRC 2026/27. Diesel rates include 4% diesel surcharge where applicable.
Real-World Example: £50k Salary, Tesla Model Y
Let's take a concrete example. An employee earning £50,000 per year wants a Tesla Model Y Long Range with a P11D value of £44,990.
Option A: Buy outright with a personal loan
- Monthly loan repayment (£44,990 over 48 months at 7.9% APR): ~£1,090/mo
- Insurance, servicing, tyres: ~£130/mo
- VED: ~£51/mo (£615/yr for >£40k list price)
- Total out-of-pocket: ~£1,271/mo net
Option B: Salary sacrifice via employer scheme
- Monthly gross sacrifice: £680
- Income tax saved (40%): £272
- Employee NI saved (2% above £50,270): £14
- BiK tax (2% of £44,990 ÷ 12 × 40%): £30/mo
- Net monthly cost: approximately £438/mo
- Insurance, servicing, and tyres are included in the scheme
The salary sacrifice route saves this employee roughly £833 per month compared to a personal loan - or £9,996 per year. Over a typical 3-year agreement, that is nearly £30,000 in savings on exactly the same car.
Employer NI Savings: The Business Case
Employers also benefit significantly. Because the sacrifice reduces the employee's gross salary, the employer pays less National Insurance (13.8%) on that portion of pay. On a £680/month sacrifice, the employer saves approximately £1,125 per year in NI contributions.
Many forward-thinking employers reinvest some of this saving to further subsidise the employee's scheme cost, making the deal even more attractive. It is worth asking your HR department or fleet manager whether your employer passes on any NI savings.
Key Rules and Considerations
Salary cannot fall below National Minimum Wage
The post-sacrifice salary must not fall below the National Minimum Wage (£11.44/hr for those aged 21+ in 2024/25). For most office workers on professional salaries this is not a concern, but lower earners should verify with their employer.
Only for fully electric vehicles
The 2% BiK rate applies exclusively to battery electric vehicles (zero emissions). PHEVs attract higher BiK rates (currently 8–14%), which still beat petrol and diesel but are less compelling. For maximum savings, go fully electric.
You do not own the car
Under a salary sacrifice scheme, the employer (or leasing provider) owns the vehicle. You return it at the end of the agreement. There is no option to purchase at the end, and excess mileage charges apply if you exceed the agreed annual mileage (typically 8,000–15,000 miles).
What happens if you leave your job?
If you leave your employer during the agreement, you typically have a few options: take over the lease personally, return the car early (usually with an early termination fee), or transfer it if the new employer participates in the same scheme. Always read the contract terms carefully.
How to Get Started
- Check with HR or payroll - ask whether your company offers a salary sacrifice car scheme. Many large employers use providers such as Octopus Electric Vehicles, Tusker, or Zenith.
- Calculate your net cost - use our calculator to model the monthly cost based on your gross salary and tax band.
- Choose the right car - focus on models with good residual values (Tesla, Hyundai, Kia) to protect you against mileage charges.
- Negotiate the employer NI pass-through - some employers will offer a better rate if you ask.
Ready to see exactly how much you could save? Use our TCO and salary sacrifice calculator to enter your salary, chosen car, and annual mileage - and get a full breakdown of your net monthly cost versus buying outright.
Sources: HMRC Company Car Tax Tables 2026/27, HMRC BiK rates for zero emission vehicles, National Living Wage April 2024, ABI insurance data. Salary sacrifice calculations are illustrative. Individual tax circumstances vary - consult a qualified tax adviser for personalised advice.