RealCost Guide
Electric Car Running Cost UK
Electric cars can be cheap to charge, but charging is only one part of the running cost. Insurance, tyres, servicing, repairs, depreciation and road tax can all affect whether an EV is genuinely cheap to run.
Use this guide to estimate EV charging costs, understand the wider ownership costs, and decide whether an electric car really makes financial sense for your mileage and charging setup.
An EV can be cheap to fuel but not automatically cheap to own
The charging cost is usually the part people focus on, but it is not the whole running cost. A poor insurance quote, expensive tyres or heavy depreciation can reduce the saving.
Before buying an EV, check both the charging cost and the wider ownership costs.
Calculate EV charging cost
Use the EV Charging Cost Calculator to estimate charging cost from electricity price, battery size, miles per kWh, annual mileage and charging losses.
This calculator estimates charging cost, not the full cost of owning an electric car. Use the wider sections below to check the costs people often miss.
Quick answer: electric cars are usually cheapest to run when you can charge mostly at home, the electricity price is sensible, the car has good miles per kWh and insurance, tyres and depreciation are not excessive. If you rely on public rapid charging, the running-cost advantage can shrink quickly.
Main electric car running costs
Do not judge an EV only by charging cost. These are the main costs to check.
Electricity price, charging location and miles per kWh drive the energy cost.
Some EVs can be expensive to insure, so get quotes before buying.
EV weight, power and tyre size can affect replacement costs.
EV servicing can be simpler, but repairs, diagnostics and parts can still cost money.
Check the current road tax rules before budgeting for an EV.
Value loss can wipe out charging savings if you buy the wrong EV at the wrong price.
What affects EV charging cost?
Charging cost is usually the biggest day-to-day EV running cost, but it changes heavily by setup.
Electricity price per kWh
The higher the kWh price, the higher your charging cost per mile.
Miles per kWh
A more efficient EV travels further on each unit of electricity.
Charging losses
Allow for energy lost during charging if you want a more realistic estimate.
Home charging vs public charging
This is usually the biggest difference between a cheap EV and an expensive EV to run.
Mostly home charging
Usually gives the lowest running cost, especially if you use a cheaper off-peak or EV tariff.
Mixed charging
Use a realistic average electricity price or run separate calculations for home, work and public charging.
Mostly public rapid charging
Can make an EV far less impressive on running cost and closer to petrol or diesel in real-world cost per mile.
Example EV charging cost
These examples show why charging location matters so much.
Cheap overnight charging
At 10p per kWh and 3.5 miles per kWh, charging is about 2.9p per mile before charging losses.
Standard home charging
At 30p per kWh and 3.5 miles per kWh, charging is about 8.6p per mile before charging losses.
Public rapid charging
At 80p per kWh and 3.5 miles per kWh, charging is about 22.9p per mile before charging losses.
RealCost warning: the same EV can look very cheap or surprisingly expensive depending on where it is charged.
Home charger and setup costs
Charging at home may be cheaper per mile, but there can be an upfront setup cost.
Home charger installation
If you need a home charger installed, treat that as part of the wider EV decision rather than the day-to-day charging cost.
Driveway access
EV running cost is usually strongest when you can charge reliably at home or work.
When electric cars are cheap to run
EV running cost is strongest when the car, charging and usage pattern all line up.
When EVs are not as cheap to run as expected
An electric car can still be poor value if the wider costs are wrong.
You rely on public rapid charging
Frequent rapid charging can make the energy cost much higher than expected.
Insurance is expensive
A low charging cost does not help much if the insurance premium is heavy.
Depreciation is high
Buying the wrong used or new EV can cost more in value loss than it saves in charging.
Electric car running cost vs petrol
Charging cost is often lower than petrol, but the full decision needs more than energy cost.
EV advantage
Lower energy cost, especially with home charging and efficient driving.
Petrol advantage
Lower purchase price can sometimes offset higher fuel cost, depending on the car and mileage.
Best next step
Compare both cars properly using the Electric vs Petrol Running Cost Calculator.
How this page is different from related EV pages
This page is the broader EV running-cost guide, not just a charging calculator page.
Broader EV running-cost guide covering charging, insurance, tyres, servicing and depreciation.
Best for calculating charging cost from kWh price and EV efficiency.
Best for EV pence-per-mile and home vs public charging examples.
Useful EV calculators and guides
Use these next to compare charging cost with the full car ownership picture.
Open calculator →
Compare costs →
Read guide →
Read guide →
Check full cost →
Read guide →