The comparison is rarely like for like
Most published comparisons between electric and combustion running costs are true and incomplete at the same time. They usually compare energy costs, where the electric case is strong, and stop before the items where it is weaker or simply different. A useful comparison has to look at the whole bill, over the period the car is actually kept.
The categories worth separating are energy, maintenance, tyres, depreciation, insurance and the fixed charges a jurisdiction imposes. Each behaves differently, and the direction of the difference is not the same in all of them.
Energy cost depends enormously on where charging happens
The largest variable in electric running costs is not the car. It is whether charging happens at home, overnight, on a low tariff, or at a public rapid charger at whatever the operator charges. The gap between those two situations is wide enough to change the entire conclusion of a comparison, and a driver without off-street parking is in a very different position from one with a driveway.
This is why blanket statements about electric being cheaper to run are unreliable rather than wrong. The mechanism is sound: an electric drivetrain converts stored energy to motion far more efficiently than a combustion one, and there is less waste heat. But efficiency at the wheel does not determine the price at the socket, and the price at the socket varies by an order that efficiency cannot always overcome.
Maintenance falls in some places and not others
There is genuinely less to service. No oil changes, no timing components, no exhaust system, no clutch, far fewer moving parts in the drivetrain, and regenerative braking that reduces wear on friction brakes substantially. Scheduled servicing is usually simpler and often cheaper, and that saving is real and recurring.
Tyres go the other way. Electric vehicles are heavier for their size because of the battery, and they typically deliver torque instantly, both of which accelerate tyre wear. Many use specific tyre specifications that cost more than the equivalent for a combustion car. Anyone budgeting a saving on servicing should set part of it aside for rubber.
Insurance is priced on repair cost, not on emissions
A recurring surprise is that electric vehicles are not automatically cheaper to insure, and are frequently more expensive. The reasons follow directly from how vehicle rating works. Repair costs are higher where specialist training and equipment are required, where damage near a battery pack triggers cautious assessment, and where a structural battery makes certain repairs uneconomic. Purchase prices have also tended to be higher, which raises the sum at risk.
None of that is a judgement about the technology, and the position moves as repair networks mature and the vehicles become ordinary. It is simply an illustration of the principle that a premium reflects claims cost. Anything that makes a car expensive to put right makes it expensive to insure, regardless of how it is powered.
Depreciation is the volatile term
The largest single cost of running most cars is the value they lose, and for electric vehicles that number has been unusually unstable. Rapid improvement in range and charging capability makes older models less attractive, changes in subsidy or tax treatment move demand abruptly, and uncertainty about battery condition affects what a used buyer will pay.
This is a genuinely contested area and it would be dishonest to present a confident forecast. What can be said is that any running-cost comparison that ignores depreciation is ignoring the biggest line, and that the volatility itself has a cost: it makes the total unpredictable, which is exactly what a household budget dislikes.
Charges, taxes and the direction of travel
Many jurisdictions have used vehicle taxation, congestion charging and parking policy to encourage lower-emission vehicles, and those concessions form part of the running-cost case. They are also policy rather than physics, and governments have already begun adjusting them as the fleet changes and fuel duty revenue falls. Rules vary hugely by country and change with budgets, so the local position must be checked and re-checked.
The sensible conclusion is not a verdict. It is that the shape of the bill differs: lower and more predictable energy costs if charging at home, lower routine servicing, higher tyre and insurance costs, and a depreciation line that is harder to forecast than it used to be. Which total is lower depends on the driver, the mileage, the charging situation and the country, and nobody can answer it in the abstract.
