How it works
An EV-versus-gas calculator answers the question sticker prices obscure: when does the cheaper-to-run car pay for being more expensive to buy? It compares each car's full running cost - energy plus routine maintenance - across your actual mileage. The gas side divides miles by MPG and multiplies by the pump price; the EV side divides the same miles by efficiency in miles per kWh and multiplies by your electricity rate, then layers on maintenance, where electric drivetrains genuinely win: no oil changes, fewer brake jobs thanks to regenerative braking, no exhaust or transmission service. At typical inputs - 12,000 miles, a 30-MPG gas car at $3.45, an EV at 3.5 miles per kWh charging at 16 cents - the gas car runs about $2,580 a year against roughly $1,270, saving around $1,310 annually. The calculator then sets those savings against the purchase-price premium net of incentives to find break-even: a $10,000 premium takes about 7.6 years here, which is why the honest answer swings on home-charging access, local rates and how long you keep cars. Run your own numbers before joining either camp - public fast charging is seldom cheap, and expensive home electricity erases much of the advantage.
Formula
Break-even years = (EV price - incentives - gas car price) / annual operating savings
Tips
- Charge at home if at all possible - DC fast charging can double or triple the per-kWh cost.
- Verify incentive eligibility yourself; income caps and model lists change regularly.
- Cold weather cuts EV range 20-30% - size the battery for your worst season.
- Insure both candidates before deciding; EV policies often price higher.
- The longer you keep the car, the better the EV math looks - break-even is a floor, not a finish line.
Frequently asked questions
- Are EVs cheaper than gas cars overall?
- Usually cheaper to run, often dearer to buy - so the answer depends on how many years of operating savings the premium must repay. At average US energy prices an EV saves $1,000-$1,500 a year at 12,000 miles; whether that beats the price gap is exactly what the break-even line above computes.
- How long does it take an EV to break even?
- Anywhere from immediately (cheap used EV, big rebate) to never (high local electricity rates, cheap gas, small mileage). With a $10,000 premium and $1,300 of annual savings, expect around 7-8 years. Drive more miles and the clock speeds up proportionally.
- How much does it cost to charge an EV at home?
- Miles divided by efficiency, times your utility rate. Twelve thousand miles at 3.5 miles per kWh needs about 3,430 kWh - roughly $550 a year at 16 cents per kWh, or about $46 a month added to the electric bill.
- Do electric cars really save on maintenance?
- Yes, meaningfully but modestly: no oil changes, spark plugs or transmission service, and regenerative braking stretches brake life for years. Industry estimates put EV upkeep around 40% below comparable gas cars - real money, though tires and software subscriptions can claw some back.
- Is public fast charging expensive?
- Often 2-3 times residential rates per kWh, which can push the energy cost near gasoline parity. Occasional road-trip use barely dents the math; relying on fast chargers as your main supply changes it substantially. Home charging is the assumption this comparison stands on.