Much less than it costs to buy gasoline. Exactly how much will vary depending on the vehicle and electricity rates. On average, it will be less than $1 to charge a plug-in hybrid and $2-$4 for an all-electric car. Your overall energy bill will be lowered by driving with electricity. EVs are so efficient that the cost per mile driven is significantly less than with a gasoline-powered car. For instance, a 2002 Toyota RAV4 will travel 100 miles on 4 gallons of gasoline. At $2.50/gallon, this is $10.00. A 2002 Toyota RAV4-EV will travel 100 miles on 30 kWh of electricity. At 10 cents per kWh, this is $3.00.