EV savings is the difference in total ownership cost between a battery-electric vehicle and a comparable gasoline car. The biggest moving parts are the purchase price, any tax credits or rebates, the cost of fuel, and maintenance. Unlike a simple price-tag comparison, a real EV savings estimate spreads those costs across the years you actually own the car.
Electric vehicles usually cost more up front, but they are cheaper to fuel per mile and have fewer moving parts to service. Whether that adds up to savings depends on how far you drive, how long you keep the car, and what you pay for electricity where you live. A high-mileage driver in a state with cheap electricity will see a very different result from a low-mileage driver who relies on expensive public fast chargers.
This calculator treats the comparison as a breakeven problem. It finds the net upfront premium after incentives, then subtracts the fuel and maintenance savings you accumulate each year. If the result is positive, the EV pays for itself and then saves money. If it is negative, the gas car is cheaper over that ownership window. For another utility comparison, try our Conduit Fill Calculator.
The calculator takes the purchase prices of both vehicles, any incentives that reduce the EV price, your local gas and electricity rates, the fuel efficiency of each car, your annual mileage, expected maintenance savings, and how many years you plan to own the car. From those inputs it computes the annual fuel cost for each vehicle, the total ownership cost, the lifetime savings or extra cost, and the payback period.
For the gas car, annual fuel cost is simply miles driven divided by MPG, multiplied by the price per gallon. For the EV, it is miles driven divided by miles per kWh, multiplied by the electricity rate. The difference is the annual fuel saving. Maintenance savings are added on top, and the whole amount is multiplied by ownership years before subtracting the upfront EV premium. You can look up real-world efficiency figures at fueleconomy.gov.
The result card shows the total savings number in large type, a color-coded payback chip, a stacked cost-comparison bar, and a line-by-line breakdown. If the EV is already cheaper after incentives, the chip reads “Instant savings” in green. Otherwise it shows how many years the fuel and maintenance savings need to recover the extra purchase price.
03 Ownership cost ranges
The table below shows how EV savings scale with driving profile and charging habits. These are rough annual fuel-saving ranges for a typical compact to midsize vehicle; your exact number depends on the specific cars, local prices, and climate. High-mileage drivers and people who charge at home usually see the fastest payback.
Public fast charging changes the math quickly. At a cheap home overnight rate, an efficient EV can cost a third as much per mile as a 30-mpg gas car. At a premium fast-charging rate, that advantage can shrink to near zero, especially for less efficient EVs. Home charging rates vary by utility; the U.S. Department of Energy has regional guides.
This tool is a quick planning estimate, not a replacement for a full total-cost-of-ownership study. Several real-world factors sit outside the model:
- Resale value and battery replacement are not included. EVs may depreciate differently and battery replacement is a large, uncertain future cost.
- Public fast-charging rates vary widely and are not modeled separately from home charging.
- Financing, insurance, taxes, and registration costs are excluded because they vary by credit, region, and vehicle class.
- Maintenance savings are an estimate; actual service costs depend on vehicle type, climate, and driving conditions.
- Zero or negative prices, efficiency, mileage, and ownership years are rejected by the calculator.
- Enter the purchase price of the gasoline vehicle and the electric vehicle.
- Add any rebates, tax credits, or discounts that reduce the EV price.
- Enter your local gas price and the gas car’s MPG.
- Enter your electricity rate and the EV’s real-world miles per kWh.
- Set annual mileage, maintenance savings, and ownership years, then tap Compare costs.
- Run the calculator twice if you live in a cold climate: once with summer efficiency and once with winter efficiency.
- Include only incentives you are certain you qualify for; some tax credits depend on income or vehicle assembly location.
- If you cannot charge at home, enter a higher electricity rate that reflects public charging prices.
- EVs usually win when you drive high annual miles and keep the car long enough for fuel savings to add up.
- A large upfront premium needs more years of ownership to pay back.
- Local electricity and gas prices can flip the result in either direction.
- Maintenance savings are smaller than fuel savings but still meaningful over five or more years.
- This is an estimate; real costs depend on driving habits, climate, and how you charge.
The calculator works in three stages: find the net upfront premium, find the annual fuel and maintenance savings, then spread those savings across the ownership period.
upfront_premium = ev_price − ice_price − incentive
ice_fuel = (mileage ÷ mpg) × gas_price
ev_fuel = (mileage ÷ mi_per_kwh) × electricity_price
total_savings = (ice_fuel − ev_fuel + maintenance_savings) × ownership_years − upfront_premium
Where:
- ice_price, ev_price = purchase prices in dollars
- incentive = rebates or tax credits that reduce the EV price
- mileage = miles driven per year
- mpg = gasoline car fuel economy in miles per gallon
- gas_price, electricity_price = local energy prices
- mi_per_kwh = EV efficiency in miles per kilowatt-hour
- maintenance_savings = estimated lower yearly maintenance cost for the EV
- ownership_years = years you plan to keep the vehicle
02 Worked example
Take a gas car priced at $30,000 and an EV priced at $38,000 with a $7,500 incentive. You drive 12,000 miles per year, gas costs $3.5/gallon, the gas car gets 30 mpg, electricity is $0.13/kWh, and the EV averages 3.5 miles per kWh. You expect $300/year in lower maintenance and plan to own the car for 5 years.
upfront_premium = 38000 − 30000 − 7500 = $500
ice_fuel = (12000 ÷ 30) × 3.5 = $1,400
ev_fuel = (12000 ÷ 3.5) × 0.13 = $446
total_savings = (1,400 − 446 + 300) × 5 − 500 = $5,771
payback = 500 ÷ 1,254 = 0.4 years
Over 5 years the EV saves about $5,771 after recovering the $500 upfront premium. Most of that comes from cheaper fuel, with maintenance adding a smaller but steady contribution. If you drove fewer miles or paid more for electricity, the payback would stretch out.