What you pay to charge an EV depends on your electricity rate, not a set price per gallon

Charging an electric vehicle costs less than gasoline for the same distance, but the exact amount shifts based on three things: your local electricity rate, how efficient your car is, and whether you charge at home or at a public station. There is no national price — a kilowatt-hour of electricity costs different amounts in different states and even different neighborhoods. Home charging is almost always cheaper than public charging, and overnight charging is cheaper than daytime charging in many places.

The math is straightforward once you know your electricity rate. You find how many kilowatt-hours your car uses per mile, multiply by your rate per kilowatt-hour, and that is your cost per mile. Most EVs use between 0.2 and 0.3 kilowatt-hours per mile, which means at a typical U.S. home electricity rate, you are paying roughly $0.03 to $0.05 per mile to charge at home. For comparison, a gasoline car at $3 per gallon and 25 miles per gallon costs about $0.12 per mile.

Key Takeaways

  • Home charging costs less than public charging because you pay your residential electricity rate instead of a markup, and you avoid per-minute fees.
  • Your electricity bill shows your rate per kilowatt-hour; multiply that by your car's efficiency rating to find your cost per mile.
  • Time-of-use rates offered by many utilities charge less during off-peak hours (usually late evening and early morning), which can cut your charging cost by 30 to 50 percent if you charge overnight.
  • Public fast chargers cost $0.25 to $0.50 per kilowatt-hour or $10 to $15 per 30-minute session, making them three to five times more expensive than home charging.
  • Your car's efficiency varies by model, driving conditions, and weather; the EPA rating on the window sticker is a starting point, not a may provide.

How to find your home charging cost

Start with your electricity bill. Look for the line that says "rate per kilowatt-hour" or "per kWh" — it is usually listed as cents per kilowatt-hour. If you have a time-of-use rate, you will see two or more rates depending on when you use power. Write down the rate for the hours when you plan to charge (usually late evening or early morning if you want the lowest price).

Next, find your car's efficiency rating. This is listed on the EPA label on the window sticker when you buy or lease, or in your owner's manual under "efficiency" or "energy consumption." It is measured in miles per kilowatt-hour or kilowatt-hours per 100 miles. If it says "4 miles per kilowatt-hour," that means your car uses 0.25 kilowatt-hours per mile.

Multiply your electricity rate by your car's kilowatt-hours per mile. If your rate is $0.12 per kilowatt-hour and your car uses 0.25 kilowatt-hours per mile, your cost is $0.03 per mile. A 200-mile trip would cost $6 to charge at home.

Why public charging costs more

Public charging stations charge you in two ways: a per-kilowatt-hour rate and sometimes a per-minute fee once charging slows down. A Level 2 charger at a parking lot or workplace typically costs $0.20 to $0.30 per kilowatt-hour. A DC fast charger on a highway costs $0.25 to $0.50 per kilowatt-hour, or sometimes a flat fee of $10 to $15 for a 30-minute session.

The higher price reflects the cost of installing and maintaining the station, the real estate it occupies, and the fact that the network operator is a business, not your utility company. Some networks charge less if you subscribe monthly, but the per-use cost is still higher than home charging. Public charging makes sense for road trips or when you do not have access to a home charger, but it is not economical for daily charging.

Time-of-use rates and overnight charging

Many utilities offer time-of-use rates, which charge less during off-peak hours — typically 9 p.m. to 6 a.m. — and more during peak hours. If your utility offers this rate, you can cut your charging cost significantly by charging overnight. The difference can be 30 to 50 percent cheaper than charging during the day.

Ask your utility whether time-of-use rates are available in your area and what the rates are. Some utilities offer special EV rates that are even cheaper during off-peak hours. You can also install a smart charger that automatically starts charging when rates drop, so you do not have to remember to plug in at a specific time. Smart chargers range from $300 to $800 installed, but the savings on electricity over several years often pay for the cost.

What affects your actual charging cost

The EPA efficiency rating is a laboratory test, not a real-world may provide. Your actual cost per mile depends on weather, driving style, and how much you use the heater or air conditioning. Cold weather reduces efficiency by 20 to 40 percent because the battery works harder and you use more energy for cabin heating. Highway driving is less efficient than city driving. Aggressive acceleration and high speeds also reduce efficiency.

The type of charger you use at home also matters. A Level 1 charger (standard 120-volt outlet) is slow and slightly less efficient than a Level 2 charger (240-volt), but both use your home electricity rate. A Level 2 charger costs $500 to $2,000 installed and charges much faster, which is worth it if you drive daily and need a full charge overnight.

Comparing EV charging to gasoline costs

To compare fairly, divide the gasoline price by the car's miles per gallon. At $3 per gallon and 25 miles per gallon, gasoline costs $0.12 per mile. At $0.04 per mile for EV home charging, an electric car costs about one-third as much to fuel. Even at public fast-charger prices of $0.40 per kilowatt-hour, an EV is still cheaper per mile than gasoline in most places.

The savings add up quickly. If you drive 12,000 miles per year, switching from a 25-mpg gasoline car to an EV charged at home could save you $1,000 to $1,200 per year on fuel alone. Over the life of the car, that is $10,000 to $15,000 in fuel savings, which helps offset the higher upfront cost of an electric vehicle.

Charging costs if you rent or do not have a garage

If you do not have a home charger, your charging cost will be higher because you rely on public stations. Some apartment buildings and workplaces offer free or low-cost charging, so check what is available where you live and work before assuming you have to use paid public chargers. Some utilities also offer rebates for installing a home charger, which can reduce the upfront cost.

If you rent, talk to your landlord about installing a Level 2 charger. Many landlords are willing because it increases the property's value and appeal. Some states have laws that require landlords to allow charger installation, though the tenant usually pays for it. If home charging is not possible, look for workplace charging or public networks with monthly subscription plans, which are cheaper than pay-per-use.

Frequently Asked Questions

How much does it cost to charge an EV for a full battery?

It depends on your battery size and electricity rate. A typical EV with a 60-kilowatt-hour battery charged at home at $0.12 per kilowatt-hour costs about $7.20 for a full charge. A larger 80-kilowatt-hour battery costs about $9.60. At a public fast charger at $0.40 per kilowatt-hour, the same 60-kilowatt-hour battery costs $24.

Is it cheaper to charge at night?

Yes, if your utility offers time-of-use rates. Off-peak rates (usually 9 p.m. to 6 a.m.) are often 30 to 50 percent cheaper than daytime rates. Check your electricity bill or contact your utility to see if this rate is available. If it is, charging overnight saves money and is convenient because you wake up with a full battery.

Do I need to install a home charger, or can I use a regular outlet?

A regular 120-volt outlet works but charges very slowly — about 3 to 5 miles of range per hour. A 240-volt Level 2 charger adds 25 to 30 miles of range per hour and costs $500 to $2,000 installed. If you drive daily and need a full charge overnight, a Level 2 charger is worth the investment.

How much does a DC fast charger cost per mile?

DC fast chargers cost $0.25 to $0.50 per kilowatt-hour. For a car that uses 0.25 kilowatt-hours per mile, that is $0.06 to $0.13 per mile — still cheaper than gasoline but three to five times more than home charging. They are useful for road trips but not for daily charging.

Will my electricity bill go up a lot if I charge at home?

Your bill will go up, but less than you might expect. Charging an EV adds roughly $30 to $50 per month to a typical household electricity bill if you charge daily. This is still much cheaper than buying gasoline for the same distance.