How Much Does It Cost to Charge an EV at Home?
Last reviewed: 2026-06-14
Quick answer
Home EV charging cost is usually estimated by multiplying wall energy by your electricity price per kWh. The most useful result comes from your own utility bill or time-of-use plan, not from a generic national average.
Find the energy added
If you know the battery size, multiply it by the charge percentage added. A 75 kWh battery charged from 20% to 80% adds about 45 kWh to the battery. Some vehicles and wall chargers also show the session kWh directly, which can be even better.
Use your own electricity rate
Use the rate you actually pay, including time-of-use periods when they apply. If your bill separates supply, delivery, taxes, or riders, decide whether you want a simple energy-only estimate or a closer all-in estimate.
Include efficiency loss
The wall outlet usually supplies more energy than the battery receives because of conversion and heat losses. A 45 kWh battery top-up may require about 50 kWh from the wall at 90% efficiency, so cost estimates should use wall energy.
Common mistakes
- Using a sample national average instead of the rate shown on your own utility bill.
- Comparing an energy-only home rate with an all-in public charging price.
- Forgetting session fees, taxes, or time-of-use pricing when budgeting.
Source note
EIA electricity price references explain why rates vary by location and cost factors. Use them as background only; the calculator result should come from the rate you enter.
FAQ
Does the calculator include taxes?
Only if you include taxes in the price per kWh or add them as part of your own estimate. For a quick comparison, energy-only pricing is fine; for budgeting, use the rate that best matches what appears on your bill.