Quick take
This page targets users who want to know what an EV will cost to charge each month compared with gasoline.
EV charging cost is usually easiest to estimate from three inputs: how many miles you drive, how efficient the EV is, and what you pay per kilowatt-hour.
The answer can change a lot depending on where you charge. Home charging is often the cheapest and most predictable, while public fast charging can cost enough to change the monthly comparison.
The basic charging cost formula
Start with monthly miles and divide by the EV's miles per kWh. That gives estimated kWh used for driving. Multiply by your electricity price per kWh to estimate energy cost.
For example, an EV that averages 3.5 miles per kWh and drives 1,000 miles per month uses about 286 kWh before charging losses. Add a small buffer because some energy is lost while charging.
- Monthly miles divided by miles per kWh equals driving kWh.
- Driving kWh times electricity rate equals estimated charging cost.
- Add a buffer for charging losses and cold-weather efficiency drops.
- Use separate rates for home, workplace, and public charging.
Home charging versus public charging
If most charging happens at home, your utility rate is usually the key number. Time-of-use plans can lower the cost if you charge overnight, but peak rates can be expensive if charging is not scheduled carefully.
Public Level 2 charging may be free, hourly, or kWh-based. DC fast charging is convenient for trips, but frequent use can make an EV's fuel-cost advantage much smaller.
Plan around your real routine
A commuter with a garage, predictable mileage, and off-peak charging may see a low monthly charging bill. A renter who depends on fast charging may need a much higher fuel assumption.
Before buying, map your weekly driving, where the car will sit overnight, and how often you expect to use paid public charging. That is more useful than a national average.
Recommended next steps
FAQ
How much does it cost to charge an EV at home?
Multiply the kWh needed for your monthly driving by your home electricity rate, then add a buffer for charging losses. The result depends heavily on local utility rates and miles driven.
Is fast charging cheaper than gas?
Sometimes, but not always. Fast charging often costs more than home charging, so the comparison depends on the charger price, the EV's efficiency, and local gasoline prices.