Amp & Adapter

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

The real monthly number, with a calculator you can run on your own rate — plus how home charging compares to a tank of gas at today's prices, with the math shown.

By Stephen V.Last updated How we rank

Charging an EV at home is cheap — usually far cheaper than gas — but “cheap” isn’t a number, and the number is what you actually want. It depends on just three things: how many miles you drive, how efficient your car is, and what your electricity costs. Put those in and the answer falls out. For a typical EV at the recent U.S. average residential rate, home charging runs roughly four to five cents per mile — on the order of $40–$50 a month for average driving.

Rather than ask you to trust our number, here’s a calculator. The defaults are editable assumptions, not our claims — change the rate to whatever your utility charges and the mileage to how you actually drive, and the whole thing updates.

Cost-to-charge calculator

Every figure updates from your inputs. The defaults are editable assumptions, not our claims — change them to your car and your utility rate.

Energy used
286 kWh
Charging cost
$37.14/mo
Cost per mile
3.7¢
Saved vs gas
$77.14/mo

Method: kWh = miles ÷ efficiency; charging cost = kWh × rate; gas cost = (miles ÷ mpg) × gas price. The default 13¢/kWh reflects the recent U.S. average residential electricity price (EIA); the gas default is a mid-range assumption (AAA) — both are yours to change.

The formula, in plain English

The math the calculator runs is the same one the U.S. Department of Energy uses. An EV’s efficiency is how many miles it goes per kilowatt-hour (kWh) of electricity — a typical figure is around 3 to 4 miles per kWh. So:

  • Energy used= miles driven ÷ efficiency (mi/kWh)
  • Charging cost= energy used (kWh) × your rate ($/kWh)
  • Cost per mile= charging cost ÷ miles driven

For example, driving 1,000 miles a month in a car that does 3.5 miles per kWh uses about 286 kWh; at 13 cents per kWh that’s roughly $37 a month, or about 3.7 cents a mile. Your real number depends entirely on your rate and your car — which is exactly why the calculator lets you set both.

What electricity rate should you use?

Use your own. Your rate is on your utility bill, in cents per kWh — and it varies a lot by state and by time of day. The U.S. average residential rate has been in the mid-teens of cents per kWh in recent years (the U.S. Energy Information Administration publishes the current figure), which is why we default to about 13 cents, but a reader in a high-cost state might pay double, and one on a cheap overnight EV rate might pay far less.

Cheap overnight rates change everything

Many utilities offer time-of-use rates with very low overnight prices designed for EV charging. If yours does, and you schedule charging for those hours — using your car’s timer or a charger with scheduling— your effective cost per mile can drop well below the average. It’s the single biggest lever on your charging cost, and it’s free to set up.

How it compares to gas

This is where the savings show up. A gas car’s fuel cost is (miles ÷ mpg) × gas price. A 28-mpg car driven 1,000 miles at $3.20 a gallon burns about $114 of gas a month — roughly three times the ~$37 of electricity in the example above. The exact gap depends on your local gas price (AAA publishes a daily national average) and your electricity rate, which is why the calculator compares both side by side. For most drivers, the monthly saving is real and substantial.

Two honest caveats. First, if you rely heavily on public DC fast charging rather than home charging, your per-mile cost is higher — fast charging is a convenience you pay for, and this calculator is about homecharging. Second, the comparison is fuel only; it doesn’t include the cost of the charger and install, insurance or maintenance, which vary by household.

What about the charger and install?

The numbers above are running cost. There’s also the one-time cost of a Level 2 home chargerand its installation, which depends on your panel and how far the charger is from it. Sizing the circuit correctly is part of that — see our amps and circuits guide — and whether you plug in or hardwire affects the install too. Spread over the years you’ll own the car, the hardware cost is small against the fuel savings, but it’s a real up-front number to plan for.

Frequently asked questions

How much does it cost to charge an EV at home per month?

For average driving at the recent U.S. average residential rate (~13¢/kWh), roughly $40-50 a month — about 4-5 cents per mile. Your number depends on your electricity rate and how much you drive, which the calculator above lets you set.

Is charging at home cheaper than gas?

For most drivers, yes, and often by roughly two to three times. An EV turns cheap electricity into miles very efficiently, so cost per mile is usually a fraction of gasoline's. The exact gap depends on your local gas and electricity prices — the calculator compares them.

How do I find my electricity rate?

It's on your utility bill, shown in cents per kilowatt-hour (¢/kWh). Look for the supply/energy charge. If your utility offers a time-of-use or EV rate with cheap overnight hours, note that rate — charging then can cut your cost significantly.

Does fast charging cost the same as home charging?

No — public DC fast charging is usually more expensive per kWh than home charging, sometimes much more. It's a convenience you pay for on road trips. This calculator is for home charging, which is where EVs are cheapest to run.

How much electricity does an EV use?

A typical EV goes about 3-4 miles per kWh, so 1,000 miles of driving uses roughly 250-330 kWh. At the U.S. average residential rate that's around $35-45. Efficiency varies by vehicle, weather and driving style, so use your car's real figure in the calculator.

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