EV charging salary sacrifice explained: the tax-efficient way to run an electric car

Electric cars have become genuinely tax efficient to lease, thanks to low Benefit in Kind rates under salary sacrifice schemes. What has lagged behind is the tax treatment of actually running one. Electricity is usually bought with taxed income, the same as filling a petrol car, which means the running cost side of the equation has been left out of the tax-efficient picture. EV charging salary sacrifice is what brings it in.

Where the tax efficiency comes from

Salary sacrifice works because it changes when tax is calculated. Instead of an employee earning £X, paying income tax and National Insurance on it, and then spending what is left on charging, the cost of charging is deducted from gross salary first. Tax and National Insurance are then calculated on the smaller, reduced salary.

The employee ends up paying for exactly the same electricity, but the effective cost is reduced by their combined tax and National Insurance rate, roughly 28% at basic rate, 42% at higher rate, and higher again for anyone caught in the £100,000 to £125,140 band where the personal allowance tapers away.

Why charging specifically needed this

Petrol and diesel drivers have never had a tax-efficient way to buy fuel, so it might seem odd that charging should be different. The difference is that electric cars are already being run through employer-provided salary sacrifice schemes for the vehicle itself. Once the car is inside a payroll-based, tax-efficient arrangement, it makes sense to bring the electricity that fuels it into the same arrangement, rather than leaving it as the one cost still paid from taxed income.

How the saving plays out across a typical driver

Take a driver covering 12,000 miles a year in an EV doing around 3.5 miles per kWh. That is roughly 3,430 kWh a year. Charge entirely at home on a low overnight rate and the annual cost might be under £300. Charge a meaningful share in public, which is the reality for the roughly nine million UK households without off-street parking, and the cost frequently climbs past £600 to £1,000 a year, because public rapid charging is priced closer to petrol per mile than to home electricity.

Salary sacrifice does not change the price per kWh. What it changes is how much of that cost the employee actually bears, by taking the tax and National Insurance rate off the top before the deduction hits take-home pay. A higher rate taxpayer sacrificing £480 for a year of mixed home and public charging effectively pays around £278 for it.

How The Charge Scheme delivers this in practice

The tax mechanism only works if the underlying charging cost can be tracked accurately across every location an employee charges at. The Charge Scheme does this through an app and charge card, powered by Plugsurfing, that covers:

• Home charging, calculated from smart meter or tariff data
• Workplace charging, where employers have on-site chargers
• Public charging, across 76,000+ chargepoints nationwide

All three feed into one monthly figure, which is then converted into a payroll-ready gross deduction. There is no manual receipt submission and no separate reimbursement claim for the electricity itself.

How it sits alongside business mileage

Business mileage reimbursement is a different problem with different HMRC rules, generally based on the Advisory Electricity Rate or evidenced actual cost. That still needs to run correctly, and our Reimburse product exists specifically for that. Charging salary sacrifice and business mileage reimbursement are complementary: one reduces the cost of the electricity itself, the other reimburses the employee fairly for business use, without either double-counting the other.

Getting it right

The parts an employer needs to get right are the same as any salary sacrifice benefit: eligibility rules set out clearly, a National Minimum Wage floor check in payroll, and the arrangement documented as a variation to the employment contract. None of it requires changing an existing EV salary sacrifice or company car scheme, since charging bolts on to whatever is already running. More detail is on how it works.

Next steps

To see what tax-efficient charging would be worth for your own driving pattern, use the savings calculator, or book a call to discuss setting it up for your workforce.