How Much Does It Cost to Charge an Electric Car (or a Tesla) at Home?

The sticker shock people expect from charging an electric car at home almost never arrives. Where a tank of gas is a memorable double-digit hit at the pump, topping up an EV overnight tends to cost a few dollars and disappears into your monthly power bill. The reason it feels mysterious is that the number is never printed on a screen the way a fuel price is. So let us do the actual math, because it is genuinely simple.

The formula

Home charging cost comes down to one equation:

Cost = (kWh added to the battery ÷ charging efficiency) × your electricity rate

Every piece of that is a number you can look up:

• kWh added — how much energy the battery took on.
• Your electricity rate — in dollars per kWh, printed on your utility bill.
• Charging efficiency — the only piece that trips people up. Not every kilowatt-hour that leaves the wall reaches the battery; some is lost as heat in the charger, the cable, and the car's onboard electronics, and cold weather widens that gap. A reasonable working range is 85 to 90 percent, so you pull roughly 10 to 15 percent more from the wall than the battery actually stores.

A worked example

Take a mainstream EV with about a 60 kWh usable battery. Say you are refilling from nearly empty to nearly full and adding around 55 kWh to the battery. At 88 percent efficiency, the wall actually delivers about 55 ÷ 0.88, or roughly 62 kWh. Residential electricity in the US commonly runs in the ballpark of 16 cents per kWh, though your own bill is the number that counts. That puts the charge at about 62 × 0.16, or close to 10 dollars for a near-full charge.

Worth knowing: spread across the roughly 190 to 210 miles that 55 kWh moves in an efficient EV, the energy works out to only a few cents per mile — comfortably below what the same distance costs in a gasoline car at pump prices.

The US Department of Energy and EPA cover this comparison in plain terms in their electric vehicle guidance.

How much does it cost to charge a Tesla?

About 4.6 dollars per 100 miles for a Model Y at 16 cents per kWh, using the car's EPA figure rather than a guessed battery size. fueleconomy.gov rates the 2025 Tesla Model Y Long Range AWD at 29 kWh per 100 miles, with a 311-mile range:

Swap in your own rate; it is the only number in the table that changes from house to house. EPA's label describes 29 kWh as the energy the car uses to travel 100 miles and does not say whether wall-side charging losses are inside it, so treat the result as an estimate and let your bill settle it.

Worth knowing: the arithmetic is the same for any EV. Find its kWh-per-100-miles figure on fueleconomy.gov and multiply by your rate.

What actually drives the number

Three inputs move your cost, and only three:

Notice what is not on that list: the level of your charger. This surprises people, so it is worth stating plainly.

Level 1 vs Level 2: speed, not price

A Level 1 setup uses a standard 120V household outlet and adds only a few miles of range per hour. A Level 2 setup on a 240V circuit adds most of a day's driving overnight.

The trap: the two levels move the same kilowatt-hours at the same price per kWh, so a full charge costs the same on either one. Level 2 buys you speed and convenience, not cheaper electricity.

If a short commute means Level 1 keeps up with your driving, the slower speed costs you nothing. If you need to refill a larger battery every night, Level 2 is worth it for the time, not the money. Our EV home charger buying guide walks through when the faster hardware earns its place, and the EV home chargers category covers the units themselves.

How long does it take to charge an electric car at home?

Divide the kilowatt-hours you need by the charger's power. The Department of Energy's Alternative Fuels Data Center puts Level 1 at about 1.9 kW, or roughly 5 miles of range per hour, and says most home Level 2 chargers run at up to 30 amps and deliver 7.2 kW, roughly 25 miles of range per hour.

That 12.5-hour estimate lines up with the EPA label, which lists the 2025 Model Y Long Range AWD at 12 hours to charge from empty on 240 volts. Few people charge from empty, so a normal overnight top-up is far shorter. Our EV charging calculator runs these numbers for your own car and rate.

The biggest lever: off-peak charging

If your utility offers a time-of-use rate, this is where the real savings live. Off-peak electricity — typically overnight — can be priced well below the daytime rate, and an EV is the ideal appliance to shift into that cheap window because it charges while you sleep. Most cars and chargers let you schedule a start time so this happens automatically.

What actually moves your bill:

• Your electricity rate, and whether you charge on- or off-peak
• How many kWh you add, which follows your driving
• Cold weather, which widens the efficiency gap

What barely moves it:

• Level 1 versus Level 2 — same energy, same price per kWh
• The charger's amperage rating, which buys speed rather than cheaper power

The Department of Energy's guide to charging at home is a good primer on setting this up. Shifting your charging to off-peak hours usually saves more than any hardware decision you could make.

Why home beats public fast charging

The flip side of cheap home charging is that public DC fast charging carries a convenience premium and typically costs several times your residential rate. That is the price of speed on a road trip, and it is worth it when you need range in minutes. But it is a poor everyday habit. The math above is exactly why so much EV ownership advice, including the EPA's rundown of common electric vehicle myths, points owners toward home charging as the default and fast charging as the exception.

Run your own numbers

National averages are a starting point, not an answer, because your cost is dominated by your specific rate and battery. Plug your figures into our EV charging calculator to get a number that reflects your utility, your car, and whether you charge on- or off-peak. Once you see it, the mystery evaporates — and so does the sticker shock.