In most cases, yes. An electric car is typically 30-60% cheaper to run per mile than a comparable petrol car in the UK. For an average driver doing 10,000 miles per year, an electric car might cost around £500-£750 per year in electricity, compared to £1,500-£2,000 for petrol. The exact savings depend on your electricity tariff (home charging is cheapest), the efficiency of the vehicles being compared, and current fuel prices. Electric cars also benefit from lower road tax, lower maintenance costs, and exemption from ULEZ and Clean Air Zone charges.

The cost to charge an electric car in the UK depends on where you charge. Home charging on a standard variable tariff (around 25p/kWh in 2026) costs roughly 6-8p per mile for an average EV. Using an off-peak smart tariff (around 7-10p/kWh overnight) reduces this to 2-3p per mile. Public rapid chargers are the most expensive at 40-80p/kWh (12-24p per mile). For a typical EV doing 10,000 miles per year, annual home charging costs around £500-£800, compared to £1,500-£2,000 for petrol.

To calculate the cost per mile of an electric car, you need two figures: your electricity price (in pence per kWh) and your car’s efficiency (in miles per kWh or kWh per 100 miles). The formula is: Cost per mile = (electricity price × kWh per 100 miles) ÷ 100. For example, if electricity costs 25p/kWh and your car uses 3.5 miles per kWh (28.6 kWh/100mi), the cost per mile is (25 × 28.6) ÷ 100 = 7.15p per mile. Alternatively: 25p ÷ 3.5 miles per kWh = 7.14p per mile.

To calculate the cost per mile of a petrol car, you need your car’s fuel economy (in miles per gallon, MPG) and the current petrol price (in pence per litre). The formula is: Cost per mile = (petrol price per litre × 4.546) ÷ MPG. The 4.546 converts litres to UK gallons. For example, if petrol costs 140p per litre and your car achieves 45 MPG, the cost per mile is (140 × 4.546) ÷ 45 = 14.15p per mile. For a diesel car, the calculation is identical but diesel is often slightly cheaper per litre.

The payback period for an electric car depends on the purchase price premium over a comparable petrol car and your annual savings. Typical EV purchase premiums range from £3,000 to £10,000 depending on the model. With annual running cost savings of £800-£1,500 (combining fuel, tax, maintenance, and ULEZ savings), the payback period is typically 3-8 years. Higher mileage drivers see faster payback because they save more on fuel each year. The gap is narrowing as EV prices fall and fuel prices remain volatile.

Yes, electric cars are generally better for the environment, even accounting for battery production. An average petrol car emits around 2.31 kg of CO2 per litre of fuel burned, equating to roughly 170-200 g CO2 per km. An electric car charged on the UK grid (which is increasingly renewable) produces roughly 50-80 g CO2 per km — about 60-70% less. As the UK grid continues to decarbonise (targeting net zero by 2035), this gap will widen further. Even including battery manufacturing, an EV typically ‘pays back’ its carbon debt within 1-2 years of driving.

Beyond the purchase price, electric cars have some additional considerations: home charger installation (£800-£1,500 if you don’t have one), potentially higher insurance premiums (though this gap is closing), battery replacement after 8-15 years (£3,000-£7,000, though most are covered by 8-year warranties), and possibly higher depreciation in the early years. However, these are offset by lower fuel costs, lower maintenance (no oil changes, fewer moving parts), zero road tax until April 2025 (then a small fee), ULEZ/Clean Air Zone exemption, and potential workplace charging benefits.

A standard 7kW home EV charger installation in the UK typically costs between £800 and £1,500 including supply and fit. More powerful 11kW or 22kW units cost more but require three-phase electricity, which most UK homes don’t have. The OZEV (Office for Zero Emission Vehicles) EV Chargepoint Grant provides up to £350 towards installation for eligible renters and flat owners. Many EV owners recover the installation cost within 2-3 years through fuel savings compared to public charging.