Home vs Public Charging Costs in Europe (2026): What an EV Really Costs to Run

"EVs are cheap to run" is true — but only if you charge them the right way. The cost of the same electric car can swing from far cheaper than petrol to barely cheaper at all, depending on where you plug in. Energy prices vary enormously across Europe and over time, so instead of quoting numbers that'll be wrong in your country next month, here's how to calculate your own real cost-per-100 km — and why the home-vs-public split is the whole ball game.

The one formula that tells you everything

Every EV running-cost question comes down to two numbers:

Cost per 100 km = (your EV's kWh/100 km) × (your price per kWh)

• kWh/100 km is the EV's real-world efficiency — typically ~15–22 kWh/100 km for most cars (small EVs lower, big SUVs higher; more in winter/at speed). It's the EV equivalent of L/100 km.
• Price per kWh is what you pay to charge — and this is where home vs public makes or breaks the math.

Plug in your own local electricity price and you get a real, honest figure — not a brochure claim.

Home charging — where the savings live

Charging at home on a domestic tariff (especially overnight) is almost always the cheapest way to fuel an EV, often dramatically cheaper per km than petrol or diesel. Two things make it even better:

• Off-peak / time-of-use tariffs. Many providers offer cheap overnight rates specifically for EV charging — charging while you sleep can roughly halve the per-kWh cost versus the standard rate.
• A home wallbox (7 kW) charges far faster than a standard socket and lets you fill up overnight without thinking about it.

This is why home charging is the single biggest factor in whether an EV is cheap to run — it's the difference between "a fraction of petrol" and "about the same."

Public charging — convenient, but a different price tier

Public charging is essential for trips, but it's a step up in cost, and there are two very different tiers:

• Public AC (slow/destination, ~7–22 kW) — found at car parks, supermarkets, workplaces. Cheaper than rapid, sometimes free; good for topping up while parked.
• Public DC rapid/ultra-rapid (50–350 kW) — the motorway-stop chargers. The most expensive way to charge by far; per-kWh prices here can approach (or in some cases match) the per-km cost of running a petrol car.

If you charge mostly on rapid chargers, a lot of the EV running-cost advantage evaporates. That's the scenario where "EVs are cheap to run" quietly stops being true.

Putting it together — the honest picture

• Home charger + overnight tariff: the best case — typically well below petrol cost per km. This is the EV-ownership sweet spot.
• Mostly home, occasional rapid for trips: still clearly cheaper than petrol overall — rapid charging is the exception, not the routine.
• No home charging, reliant on public/rapid: the savings shrink, and on ultra-rapid alone an EV can cost close to a petrol car to "fuel" — while you still deal with charging stops.

The takeaway: an EV's running cost isn't a fixed property of the car — it's a property of how and where you charge.

What this means for buying a used EV

This is exactly why, in are used electric cars worth it, the make-or-break question is "can you charge at home?":

• If you can charge at home — the running-cost case is strong, and a used EV is often excellent value.
• If you can't — model the cost honestly using mostly public/rapid prices before assuming you'll save; you might, but by less than the headlines suggest.
• Efficiency matters too — a frugal EV (low kWh/100 km) costs less to run and needs charging less often. Pair this with the real-world range picture.

Before you buy, run the specific EV through the AutoFindr analyzer — make, model, year, mileage — for its composite reliability score, known issues, and a fair-price band, and shortlist from the most reliable used electric cars. The cheapest EV to run is a dependable one you can charge at home.

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