What EV Charging Actually Costs

The running cost is the happy surprise of EV ownership, and it is also the number the whole buying-guide category skips. Charging at home is generally well below what a comparable gas car costs to fuel - often by a wide margin - but the exact figure depends on your electricity rate and your car's efficiency. So instead of a vague "it's cheaper," we show the formula, a worked example, and a calculator you can run for your own car.

Start with the number for your car

The core guide is cost to charge at home, which has an interactive calculator: put in your battery size or miles, your electricity rate, and your car's efficiency, and it returns the cost per full charge and the cost per mile. The one formula behind all of it is simple - energy used (kWh) times your rate (dollars per kWh) - and we show it so you can check the math by hand.

How the cost question divides

• Cost per charge vs cost per mile. Cost per charge depends on battery size; cost per mile is the fairer number for comparing against gas, because it normalizes for how far you actually drive.
• Flat rate vs time-of-use. On a time-of-use plan, when you charge changes what you pay - often dramatically. See off-peak and time-of-use charging.
• EV vs gas. The apples-to-apples comparison, with the assumptions shown, is in EV vs gas cost.

What decides your cost

Three inputs: your electricity rate (residential rates vary widely by state and utility), your car's efficiency (miles per kWh - a heavy truck EV and an efficient sedan can differ by more than double), and whether you can shift charging to cheaper off-peak hours. Charging losses add a small overhead too - roughly 10 percent of the energy drawn does not reach the battery - which our calculator accounts for so the estimate is realistic rather than optimistic.

The mistake people make

Comparing a public fast-charging price to home charging and concluding EVs are expensive. Public DC fast charging is a premium, occasional convenience; home Level 2 charging on a residential rate is the everyday cost that actually matters for ownership, and it is a different, much lower number. Get a Level 2 setup sorted - our best Level 2 chargers - and home becomes your default. If the payback of installing one is what you are weighing, the calculator makes that concrete.