ELECTRIC CARS ยท COSTS
The short answer
An EV almost always costs less per mile to fuel and to maintain than a comparable gas car, and the maintenance saving is the one people underestimate. Where the picture gets muddier is insurance, depreciation, and tires, which can run higher. The single biggest variable is whether you charge at home: home charging is where the running-cost advantage lives, and relying on public fast charging erodes much of it.
Fuel: the obvious win
To compare honestly, work in cost per mile rather than cost per fill.
For an EV: take your electricity rate in dollars per kWh, and divide by the car’s efficiency in miles per kWh. A car doing 3.5 miles per kWh on a 15 cent rate costs roughly 4 cents a mile.
For a gas car: divide the price per gallon by the mpg. A 30 mpg car at $3.50 a gallon costs about 12 cents a mile.
Those are illustrative numbers, and yours will differ, but the shape of the result holds across most of the country: home charging is dramatically cheaper per mile. Two things change it. Time-of-use rates can cut your cost substantially if you charge overnight, which is the single easiest saving available to an EV owner. Public fast charging is priced much closer to gasoline, so if it is your primary method the advantage narrows sharply.
Maintenance: the underrated win
An EV drivetrain simply has far fewer things to service. There are no oil changes, no spark plugs, no fuel filters, no timing belt, no exhaust or emissions system, and no transmission fluid in the conventional sense.
Brakes deserve a special mention. Regenerative braking does most of the slowing, so the friction brakes are used far less. EV brake pads routinely last much longer than on a comparable gas car, and that is a real recurring saving. The ironic maintenance item is that brakes sometimes need attention from underuse, such as corrosion, particularly in areas with road salt.
What you still pay for: tires, cabin air filters, wiper blades, brake fluid, coolant for the battery thermal system, and suspension wear.
Where EVs cost more
- Insurance often runs higher. Repair costs can be greater, and some structural damage near the battery pack can total a car that would have been repairable otherwise. Get quotes before you buy, not after.
- Tires wear faster. EVs are heavy and deliver instant torque, and many use specific low-rolling-resistance or noise-reducing tires that cost more to replace.
- Depreciation has been steep on some models, because the technology is moving fast and incentives shift the used market. This is bad if you are buying new and excellent if you are buying used.
- Home charger installation is a real up-front cost. See what installation actually costs.
The honest bottom line
For a driver who charges at home and keeps the car for years, an EV’s total running costs are usually meaningfully lower, with fuel and maintenance doing the heavy lifting. For someone without home charging who relies on fast chargers, the case is much weaker and worth working through carefully with your own numbers.
And the point we keep returning to: the cheapest mile is the one you do not drive. If a meaningful share of your trips are short and local, replacing some of them with an e-bike beats any car on cost, whatever it runs on.
Where the money actually goes
Electricity, and why the rate matters more than the car
Charging cost depends far more on when and where you charge than on which EV you drive. Home charging on an overnight or off-peak tariff is the cheapest energy most households can buy. Public rapid charging can cost several times as much per unit, occasionally approaching the per-mile cost of petrol.
The practical consequence: an EV owner with home charging and a good tariff sees dramatic savings. An EV owner reliant on public rapid charging sees modest savings at best. Before buying, work out honestly which of those you will be, because it changes the whole calculation. Our EV versus gas calculator lets you put your own rates in.
Servicing
This is where EVs quietly win. There is no oil to change, no spark plugs, no timing belt, no exhaust system, no clutch. Routine servicing is largely tyres, brake fluid, cabin filter and a software check. Brake pads and discs typically last far longer than on a petrol car, because regenerative braking does most of the slowing.
Tyres, which cost more
EVs are heavy and deliver torque instantly, and both wear tyres faster. Many also use specific low-rolling-resistance or noise-damped tyres that cost more than the equivalent for a petrol car. Budget for more frequent replacement, and treat cheap tyres as a false economy on a heavy, quick vehicle.
Insurance
Often higher, for two reasons: the purchase price is usually higher, and repairs can be more specialised, particularly anything involving the battery pack or the structure around it. This gap has narrowed as EVs have become common, but it is worth getting a real quote before committing rather than assuming parity.
Depreciation, the largest cost of all
For most owners depreciation dwarfs every running cost combined, and it is the number buyers most often ignore. It has also been the most volatile figure in the EV market, moving with battery prices, incentives and new model launches. If you buy new, this is the cost that matters most. If you buy used, someone else has already paid it, which is why a used EV is frequently the better financial decision.
What people forget to count
- The home charger install. A one-off cost that belongs in year one. See what installation actually costs.
- Standing charges and tariff changes. A cheap overnight rate may come with a higher day rate, which affects the rest of your household bill.
- Charging away from home. Even occasional rapid charging on trips adds up, and it is the cost most often left out of comparisons.
- Battery health on a used car. Worth paying for a state-of-health check. It is the single most important number on a used EV and it is not visible from the outside.
An honest summary
An EV with home charging is meaningfully cheaper to run than a comparable petrol car: much cheaper fuel, much cheaper servicing, offset partly by tyres and insurance. That is a real and repeatable saving.
An EV without home charging is a more marginal financial case, and should be chosen for other reasons: quietness, local air quality, or simply preferring how it drives. Those are perfectly good reasons. They are just not the same argument, and it is worth being clear with yourself about which one you are making.
And the honest broader point: the cheapest mile is still the one you do not drive. Replacing a few short car trips a week does more for both your costs and your emissions than most vehicle choices. We make that case in start with the short trips.
Frequently asked questions
Is an electric car cheaper to run than petrol?
With home charging on an off-peak tariff, yes, and by a wide margin on fuel and servicing. Without home charging, relying on public rapid charging, the saving is much smaller and occasionally close to nil.
Do electric cars need servicing?
Yes, but far less. There is no oil, no spark plugs, no timing belt, no exhaust and no clutch. Routine work is mostly tyres, brake fluid, cabin filter and software. Brakes last longer because regenerative braking does most of the slowing.
Why are EV tyres more expensive?
EVs are heavy and deliver torque instantly, which wears tyres faster, and many use specific low-rolling-resistance or noise-damped tyres that cost more than standard equivalents.
Is EV insurance more expensive?
Often somewhat higher, because purchase prices are higher and some repairs are more specialised, particularly around the battery. The gap has narrowed as EVs have become common, but get a real quote rather than assuming.
What is the biggest cost of owning an EV?
Depreciation, for most owners, and by a large margin over all running costs combined. It has also been volatile. Buying used avoids the steepest part of it.
How do I check the battery health on a used EV?
Ask for a state-of-health reading, which many manufacturers and independent specialists can produce. It is the most important single figure on a used EV and cannot be judged by looking at the car.