How Much Does It Cost to Charge an Electric Car at Home?

Charging an electric car at home may cost approximately $5 to $10 per 100 miles, depending on the vehicle’s efficiency and your electricity rate.

For example, an electric vehicle that uses 30 kWh per 100 miles would cost $6 per 100 miles at an electricity rate of $0.20 per kWh.

If you drive 1,000 miles per month, the same example would use approximately 300 kWh and add about $60 per month to your electric bill.

Actual cost depends on the vehicle, driving conditions, charging losses, local rates, seasonal temperatures, and whether you charge during peak or off-peak hours.

Home EV Charging Cost at a Glance

The following examples assume:

• Vehicle efficiency of 30 kWh per 100 miles

• Electricity rate of $0.20 per kWh

• Home charging for all miles driven

500 miles per month

The vehicle would require approximately 150 kWh.

The estimated charging cost would be $30 per month.

1,000 miles per month

The vehicle would require approximately 300 kWh.

The estimated charging cost would be $60 per month.

1,200 miles per month

The vehicle would require approximately 360 kWh.

The estimated charging cost would be $72 per month.

1,500 miles per month

The vehicle would require approximately 450 kWh.

The estimated charging cost would be $90 per month.

These examples are based on rated energy consumption. Real-world electricity drawn from the home can vary because of charging losses, temperature, speed, tires, cabin heating and cooling, and driving behavior.

How to Calculate Home EV Charging Cost

The best method uses the vehicle’s electricity consumption in kWh per 100 miles.

Use this formula:

Monthly electricity use = monthly miles ÷ 100 × kWh per 100 miles

Then calculate the cost:

Monthly charging cost = monthly electricity use × electricity rate

Suppose your electric car uses 30 kWh per 100 miles and you drive 1,000 miles per month:

1,000 miles ÷ 100 = 10

10 × 30 kWh = 300 kWh per month

At $0.20 per kWh:

300 kWh × $0.20 = $60 per month

Use the WattBasis Electricity Cost Calculator to test different energy-use and electricity-rate scenarios.

If you do not know what your utility charges, see how to find your electricity rate on a U.S. utility bill.

Cost Per Mile

Use this formula:

Cost per mile = kWh per 100 miles ÷ 100 × electricity rate

For a vehicle rated at 30 kWh per 100 miles:

30 kWh ÷ 100 = 0.30 kWh per mile

At $0.20 per kWh:

0.30 kWh × $0.20 = $0.06 per mile

The estimated electricity cost would therefore be 6 cents per mile.

According to the U.S. Department of Energy’s Alternative Fuels Data Center, EV charging cost can be calculated using the electricity rate and the vehicle’s consumption in kWh per 100 miles.

Charging Cost at Different Electricity Rates

Suppose the electric car uses 30 kWh per 100 miles.

At $0.15 per kWh

30 kWh × $0.15 = $4.50 per 100 miles

The estimated cost is 4.5 cents per mile.

At $0.20 per kWh

30 kWh × $0.20 = $6 per 100 miles

The estimated cost is 6 cents per mile.

At $0.25 per kWh

30 kWh × $0.25 = $7.50 per 100 miles

The estimated cost is 7.5 cents per mile.

At $0.30 per kWh

30 kWh × $0.30 = $9 per 100 miles

The estimated cost is 9 cents per mile.

A driver in an area with expensive electricity can therefore pay twice as much as someone driving the same vehicle where electricity costs less.

Monthly Cost by Vehicle Efficiency

The following examples assume 1,000 miles per month and an electricity rate of $0.20 per kWh.

Efficient EV using 25 kWh per 100 miles

1,000 ÷ 100 × 25 kWh = 250 kWh per month

250 kWh × $0.20 = $50 per month

EV using 30 kWh per 100 miles

1,000 ÷ 100 × 30 kWh = 300 kWh per month

300 kWh × $0.20 = $60 per month

Larger EV using 40 kWh per 100 miles

1,000 ÷ 100 × 40 kWh = 400 kWh per month

400 kWh × $0.20 = $80 per month

Do not assume every electric vehicle consumes the same amount. Vehicle size, weight, aerodynamics, drivetrain, tires, climate, and driving speed can make a substantial difference.

How Much Does a Full Charge Cost?

A simple full-charge estimate uses battery capacity:

Charging cost = battery energy added × electricity rate

At $0.20 per kWh, the battery-only calculation would be:

• 40 kWh: approximately $8

• 60 kWh: approximately $12

• 75 kWh: approximately $15

• 100 kWh: approximately $20

However, battery capacity and wall electricity are not identical.

Some electricity is lost through the charging system, battery conditioning, and other vehicle processes. A charge from the wall may therefore consume more energy than the amount ultimately stored in the battery.

For a more realistic cost, use the energy reported by the charger, the vehicle’s charging history, or the electricity meter.

Cost to Charge From 20% to 80%

Drivers rarely charge a completely empty battery to 100%.

Suppose an EV has a 75 kWh usable battery and is charged from 20% to 80%.

The state-of-charge increase is:

80% − 20% = 60%

The energy added to the battery is approximately:

75 kWh × 0.60 = 45 kWh

At $0.20 per kWh:

45 kWh × $0.20 = $9

That is the battery-energy calculation. Actual electricity drawn from the home may be slightly higher because of charging losses and battery conditioning.

Charging Losses Explained

Not every kWh taken from the electrical panel reaches the battery.

Energy can be used or lost through:

• The onboard charger

• Charging cables and electronics

• Battery heating or cooling

• Vehicle computers

• Standby operation

• Low-temperature battery conditioning

If you calculate cost using energy delivered to the battery, include the additional energy drawn from the wall.

If you use the charger’s recorded kWh or a dedicated electrical meter, those readings normally provide a better estimate of what the utility will bill.

Official efficiency information for individual vehicles is available through FuelEconomy.gov. Look for kWh per 100 miles, rather than estimating consumption only from battery size and advertised range.

Level 1 vs. Level 2 Home Charging Cost

Level 1 Charging

Level 1 charging normally uses a 120-volt household circuit.

It can be suitable for:

• Short daily commutes

• Plug-in hybrids

• Drivers whose cars remain parked for long periods

• Households that do not need to recover many miles overnight

The U.S. Department of Energy notes that many drivers can meet their daily needs using Level 1 charging when a suitable dedicated circuit is available.

Level 2 Charging

Level 2 charging normally uses 240 volts and provides faster charging.

It may be more suitable for:

• Longer commutes

• Larger EV batteries

• Irregular driving schedules

• Multiple electric vehicles

• Drivers who need faster overnight recovery

Level 2 does not automatically make each kWh more expensive. The utility charges for energy and may also apply time-based rates or other rate-plan rules.

The charger’s higher power primarily changes how quickly energy is delivered.

Charging Power vs. Electricity Consumption

Charging power is measured in kilowatts, while total energy is measured in kilowatt-hours.

A charger operating at 7.2 kW for five hours would theoretically deliver:

7.2 kW × 5 hours = 36 kWh

At $0.20 per kWh, 36 kWh costs:

36 kWh × $0.20 = $7.20

Actual charging power can vary during a session. The car’s onboard charger, battery temperature, state of charge, electrical circuit, and charger settings may limit the power.

A higher-power charger does not necessarily use more electricity over a month if the vehicle travels the same distance. It may simply deliver the required energy in less time.

How Long Does Home Charging Take?

Charging time depends on:

• Battery energy required

• Charger output

• Vehicle’s onboard charging limit

• Circuit capacity

• Battery temperature

• Current state of charge

• Charging schedule

Use this simplified formula:

Charging time = energy required ÷ charging power

If the vehicle needs 45 kWh and accepts 7.2 kW:

45 kWh ÷ 7.2 kW = 6.25 hours

The real session may take longer because power can vary and some electricity supports charging-system operation.

Peak and Off-Peak Electricity Rates

Some utilities charge different prices depending on the time of day.

Suppose a charging session uses 45 kWh.

At an off-peak rate of $0.12 per kWh

45 kWh × $0.12 = $5.40

At a peak rate of $0.30 per kWh

45 kWh × $0.30 = $13.50

The same amount of electricity would cost $8.10 more during the higher-priced period.

Before joining a time-of-use plan, compare the complete rate structure. A cheaper overnight EV rate may be combined with higher prices during other hours.

Consider air conditioning, water heating, pool equipment, cooking, and other household loads—not only the car.

How Much Can an EV Add to the Electric Bill?

An EV may become one of the home’s larger electrical loads, especially for a high-mileage driver.

Suppose a vehicle uses 30 kWh per 100 miles.

500 miles per month: approximately 150 kWh

1,000 miles per month: approximately 300 kWh

1,500 miles per month: approximately 450 kWh

2,000 miles per month: approximately 600 kWh

At $0.20 per kWh, those amounts would cost approximately $30, $60, $90, and $120 per month, respectively.

If the bill increases by more than expected, compare the actual kWh consumed—not only the amount owed. Utility-rate changes and other household loads can also raise the bill.

Read our guide to why an electric bill went up for additional checks.

Home EV Charging vs. Gasoline Cost

To compare an EV with a gasoline vehicle, calculate cost per mile for both.

Electric vehicle example

• Efficiency: 30 kWh per 100 miles

• Electricity rate: $0.20 per kWh

• Cost: $0.06 per mile

Gasoline vehicle example

• Fuel economy: 30 miles per gallon

• Gasoline price: $3.50 per gallon

$3.50 ÷ 30 miles = approximately $0.117 per mile

In this example, the gasoline vehicle costs approximately 11.7 cents per mile, while the EV costs 6 cents per mile for home electricity.

The result can change with fuel prices, electricity rates, vehicle efficiency, charging location, weather, and driving conditions.

Home Charging Equipment and Installation Cost

Electricity is only one part of the home-charging budget.

A Level 2 installation may include:

• Charging equipment

• Dedicated circuit

• Breaker and wiring

• Electrical-panel work

• Permit and inspection

• Garage or outdoor cable routing

• Trenching

• Load-management equipment

• Utility upgrades

The Department of Energy’s EV charging installation guidance explains that cost varies considerably based on charger power, wiring distance, labor, permitting, and electrical upgrades.

Obtain a complete quote before purchasing equipment. A cheap charger can still require an expensive installation if the electrical panel is far from the parking area or lacks sufficient capacity.

Can Solar Panels Charge an Electric Car?

Solar panels can offset part of the electricity used for home EV charging, but the car is not automatically powered directly by solar energy every time it is plugged in.

Results depend on:

• Solar-system size

• Daily electricity production

• Driving mileage

• Charging schedule

• Home battery availability

• Utility billing rules

• Export compensation

• Other household consumption

Daytime charging can align more closely with solar production, while overnight charging normally uses the grid or stored battery energy.

Learn more about whether solar panels lower an electric bill.

How to Measure Your Actual Charging Cost

Use the Charger or Vehicle App

Many connected chargers and EVs record session duration and electricity use.

Check whether the displayed figure represents energy drawn from the wall or energy added to the battery.

Use a Dedicated Electrical Meter

A professionally installed circuit-level meter can measure electricity consumed by the charging circuit.

This can be useful when tracking operating costs or reimbursing charging expenses.

Compare Utility Data

Some utilities provide hourly or 15-minute usage information.

Compare charging periods against similar periods when the vehicle was not connected.

Check the Utility Bill

Record monthly mileage and total household kWh before and after adding the EV.

This method is less precise because weather and other appliances also affect electricity use, but it can reveal the approximate change.

How to Reduce Home EV Charging Cost

Charge During Lower-Priced Hours

If your utility offers time-based pricing, schedule charging during the least expensive period.

Use the Correct Rate

Do not rely only on a national average. Include energy charges, applicable adjustments, and the structure of your own rate plan.

Improve Driving Efficiency

High speed, rapid acceleration, cold weather, low tire pressure, heavy loads, and cabin heating can increase electricity consumption.

Follow the vehicle manufacturer’s tire-pressure and operating recommendations.

Precondition While Connected

When supported by the vehicle, preconditioning while plugged in may allow some cabin and battery-conditioning energy to come from the home rather than the battery before departure.

Actual savings depend on the car, climate, schedule, and electricity rate.

Avoid Unnecessary Public Fast Charging

Public charging prices vary and can be considerably different from residential electricity rates.

Compare the complete price, including session, idle, parking, membership, or time-based fees.

Home Charging Safety

EV charging creates a significant continuous electrical load.

The Department of Energy advises that installations comply with applicable codes and permitting requirements. A qualified electrician should confirm that the electrical service, panel, circuit, wiring, outlet, and charging equipment are appropriate.

Use safety-certified equipment and manufacturer-approved connections.

Do not use damaged cables, improvised adapters, unsupported extension cords, loose outlets, or equipment that repeatedly overheats or trips a breaker.

Outdoor chargers and connections must be rated for their location and installed correctly.

Frequently Asked Questions

How much does it cost to charge an electric car at home each month?

At 30 kWh per 100 miles, 1,000 monthly miles, and $0.20 per kWh, the estimated cost is $60 per month.

How much does 100 miles of EV charging cost?

At 30 kWh per 100 miles and $0.20 per kWh, the estimated cost is $6.

Is Level 2 charging more expensive than Level 1?

The electricity rate is normally charged per kWh, so faster charging does not automatically make the energy more expensive.

Installation cost, charging efficiency, time-of-use rates, and equipment consumption may differ.

Does charging an EV use a lot of electricity?

An EV can add several hundred kWh to monthly household consumption. The amount depends primarily on mileage and vehicle efficiency.

Is it cheaper to charge at night?

Only when the utility offers lower overnight or off-peak rates. Under a flat-rate plan, the price per kWh may remain the same throughout the day.

Does a charger continue using electricity after the battery is full?

The main charging session stops, but the vehicle and charger may continue using small amounts for communications, standby operation, temperature management, or scheduled functions.

Is battery size enough to calculate monthly charging cost?

No. Battery size helps estimate an individual charge, but monthly cost depends more directly on miles driven and energy consumption per mile.

Bottom Line

An electric car using 30 kWh per 100 miles costs approximately $6 per 100 miles when home electricity costs $0.20 per kWh.

Driving 1,000 miles per month would require approximately 300 kWh and cost about $60, before accounting for differences between rated and real-world consumption.

For the most accurate estimate, use the vehicle’s recorded wall electricity, monthly mileage, and your actual utility rate. Also compare peak and off-peak prices before selecting a charging schedule or rate plan.