How Much Does It Cost to Charge an EV at Home?

The cost to charge an EV at home comes down to one honest equation: kWh × your electric rate. There’s no separate “EV pricing” your utility charges — you’re paying the same per-kWh rate as every other appliance in the house, just metered by how many kWh the charger delivered. The only reason this feels murkier than filling a gas tank is that most drivers don’t know their own electric rate off the top of their head. Below, we work the math at a handful of illustrative rates so you can see the shape of it, then hand you a calculator to drop in your actual numbers.

The math, one more time

Whether you charge on Level 1 or Level 2, the cost math is identical — speed changes how long a charge takes, not what it costs. A full charge costs battery size (kWh) × price per kWh. A partial top-up costs kWh delivered × price per kWh — most smart chargers, including every model in our Level 2 roundup, report the kWh delivered per session in their app, so you don’t have to estimate. To get a cost per mile instead of a cost per charge, divide your rate by your car’s efficiency in miles per kWh. As our standard reference, we use roughly 3.5 miles per kWh, a reasonable middle-of-the-road figure for a mainstream EV — your car’s window sticker or trip computer will have the real number for your model.

Cost per mile at a few illustrative rates

US residential electric rates vary a lot by state and utility, so instead of quoting one number as if it were universal, here’s the math worked out across a spread of common rates, all using the 3.5 mi/kWh reference efficiency:

We use $0.15/kWh elsewhere on this site as an illustrative US average when we need one number for a worked example — treat it as a round, representative figure, not your actual bill. Check a recent statement from your utility for your real rate, and use the calculator below if it differs from anything in the table.

Why rates vary so much by state

The spread in that table isn’t arbitrary — residential electric rates genuinely differ by a factor of two or three across the country, driven by things like the local generation mix, transmission and delivery infrastructure costs, and state-level regulation. That’s a very different situation from gasoline, where prices are more uniform nationally and shift mostly with crude oil and refining costs. It’s the reason we lean on a calculator here instead of a single headline number — the honest answer to “what does it cost” depends on where you live more than almost anything else in this guide.

A monthly and annual example

Numbers per mile are useful for comparison, but bills arrive monthly, so it helps to see the same math scaled up. A driver covering 1,000 miles a month at 3.5 mi/kWh uses about 286 kWh. At the illustrative $0.15/kWh rate, that’s roughly $43 a month, or about $514 a yearfor 12,000 annual miles. Double the mileage to 24,000 miles a year and the annual figure simply doubles too, to roughly $1,029 — because the math is strictly proportional to miles driven, there’s no volume discount or penalty built in, unlike a gas car where fuel-efficiency can change with driving style in less predictable ways.

Battery size changes the full-charge price, not the per-mile price

A bigger battery costs more to fill from empty, but it doesn’t cost more per mile — it just stores more miles per fill. At the illustrative $0.15/kWh rate, a smaller roughly 60 kWh battery costs about $9 to charge from empty to full; a larger roughly 100 kWh battery costs closer to $15. The bigger battery’s full-charge price is higher, but it also goes further on that one charge, so the cost per mile is unchanged — the same 4.3¢ either way at this rate and efficiency. If you’re comparing two EVs with different battery sizes, don’t let a bigger-looking full-charge number fool you into thinking the larger battery is more expensive to drive; check the cost per mile instead.

Why your number might look different

A few things move the real-world number away from the clean table above. Charging isn’t perfectly efficient — a real session draws somewhat more from the wall than the battery actually stores, due to conversion losses, so your utility bill will run a little higher than the battery-kWh math alone suggests. Time-of-use rate plans can also swing the number a lot: charging in a cheap overnight window can cost meaningfully less per kWh than charging during a peak afternoon rate, on the same utility plan. And any EV or charger-installation incentives you received affect what the hardware cost you up front — not the ongoing cost per mile covered here.

Finding your own numbers instead of guessing

Two inputs decide your real cost: your electric rate and your car’s efficiency. Your rate is on a recent utility bill or your online account — look for the per-kWh charge, and check whether you’re on a flat rate or a time-of-use plan with different prices by hour. Your car’s efficiency is usually on the EPA label on the window sticker (listed as kWh per 100 miles or MPGe) or in the trip computer, which often reports a rolling average in miles per kWh. A smart charger’s app is another source worth checking — most, including the ones in our Level 2 roundup, log the kWh delivered per session, so you can compare that against what showed up on your utility bill and sanity-check both numbers against each other.

Home charging vs paying for public charging

Everything above assumes you’re charging at home on your own utility rate, which is usually the cheapest way to charge an EV. Public charging — a workplace Level 2 station or a public DC fast charger — typically costs more per kWh, since the operator is recovering the cost of the equipment, the real estate and often a profit margin, the way any retailer prices a convenience. We don’t have live public-charging rate data to add to the table above the way we do a home utility bill, since those rates vary by network, location and membership plan. If a meaningful share of your charging happens away from home, treat the numbers on this page as your at-home floor, not your full picture — your blended cost per mile will land somewhat higher once public sessions are mixed in.

Putting it in perspective

At an illustrative $0.15/kWh, adding 250 miles of range costs a little over $10 — a number that holds regardless of whether you charged it in one overnight Level 2 session or spread across several partial top-ups during the week, since cost tracks kWh delivered, not charge sessions. If you’re trying to decide whether home charging is worth it compared with what you spend on gas today, our EV-vs-gas cost guidetakes this same per-mile math and lines it up against a gas car’s fuel cost directly.