RealCost Guide
Average Cost to Charge Electric Car UK
The average cost to charge an electric car in the UK depends mainly on where you charge, what you pay per kWh, battery size, efficiency and charging losses.
A home-charged EV can be much cheaper to run than a petrol car, but public rapid charging can change the calculation quickly. Use this page to estimate charging cost properly instead of relying on a vague average.
The average only matters if you know where you charge
The same electric car can have very different running costs depending on whether it is charged at home, at work, on a public slow charger or on a rapid charger.
Do not judge an EV from battery size alone. The price per kWh and miles per kWh matter more for real monthly cost.
Calculate your EV charging cost
Use the EV Charging Cost Calculator to estimate charging cost from electricity price, battery size, efficiency, annual mileage, charge added and charging losses.
For mixed charging, run separate estimates for home charging, workplace charging and public charging, or use a realistic average electricity price.
Quick answer: The cost to charge an electric car depends on battery size and electricity price. For example, a 60kWh battery at £0.30 per kWh would cost about £18 before allowing for charging losses. The real cost per mile depends on how efficient the car is.
What affects the cost to charge an electric car?
EV charging cost is not one fixed number. These are the inputs that matter.
Electricity price per kWh
This is the biggest factor. Home, work and public charging can all have different prices.
Battery size
A larger battery costs more to fill from empty, but it may also give more range.
Miles per kWh
This is EV efficiency. A more efficient EV travels further for the same electricity.
Charging losses
Some electricity is lost during charging, so the wall-to-battery cost can be higher than a simple battery-size calculation.
Annual mileage
The more miles you drive, the more important charging price becomes.
Where you charge
Home charging, workplace charging and public rapid charging can produce very different monthly costs.
Home charging vs public charging
This is the biggest reason EV charging averages can be misleading.
Mostly home charging
Usually the best case for EV running costs. Your result depends on your home electricity price and whether you use a suitable tariff.
Mixed charging
Common for drivers who charge at home sometimes but also use workplace or public chargers. Use a blended realistic price per kWh.
Mostly public charging
This can be much more expensive than home charging and may reduce the saving compared with petrol.
Example EV charging costs
These examples use simple assumptions so you can see how the calculation works.
40kWh battery
At £0.30 per kWh, a full battery charge costs about £12 before charging losses.
60kWh battery
At £0.30 per kWh, a full battery charge costs about £18 before charging losses.
80kWh battery
At £0.30 per kWh, a full battery charge costs about £24 before charging losses.
Important: a full charge is not always the best way to compare EVs. Cost per mile and monthly charging cost are usually more useful.
Cost per mile is more useful than cost per charge
A large battery costs more to fill, but it may also take you further.
Efficient EV
If an EV manages 4 miles per kWh and electricity costs £0.30 per kWh, the energy cost is about 7.5p per mile before losses.
Less efficient EV
If an EV manages 2.5 miles per kWh at the same electricity price, the energy cost is about 12p per mile before losses.
Monthly EV charging cost
Monthly cost depends on mileage, efficiency and charging price.
Low mileage
A driver doing fewer miles may have a low monthly charging bill, but still needs to consider insurance, tax, tyres and depreciation.
Regular commuter
Charging cost becomes more important if the EV is used daily for commuting, school runs or work mileage.
High mileage
High-mileage EV drivers benefit most from low charging prices, but public charging can reduce the advantage.
Is charging an electric car cheaper than petrol?
Often, yes — but not always by the same amount.
EV usually wins when
You can charge mostly at home, drive enough miles to benefit, and choose an efficient EV.
Petrol may be closer when
You rely heavily on expensive public charging, drive low mileage, or the EV has higher insurance, tyres or depreciation.
Useful next step: compare the whole running-cost picture with the Electric vs Petrol Running Cost Calculator.
How this page is different from the EV charging calculator page
This page explains average charging cost. The calculator page is the tool page.
Explains average EV charging cost, why it varies, and what drivers should compare.
Focused on using the calculator to estimate your own charging cost.
Compares EV running costs against a petrol car.
Useful EV calculators and guides
Use these next to understand the full EV cost decision.
Open calculator →
Compare costs →
Open calculator →
Compare per mile →
Read guide →
Compare options →