EV vs gas: total cost of ownership compared

Where EVs win and lose on cost (the verdict)

Over a full ownership period, EVs usually cost less to run than gas cars — charging at home is typically far cheaper per mile than fuel, and EVs need less maintenance. At representative US prices, an EV rated at 3.5 mi/kWh charged at about $0.17/kWh costs roughly 5.5 cents per mile to fuel, versus about 11 cents per mile for a 30 mpg car at $3.30/gal — about half. Gas cars often win on upfront price, so the EV's lower running costs take a few years (or a break-even mileage) to overtake the gap. Which comes out ahead depends on your annual miles, your local electricity and fuel prices, and the two vehicle prices — exactly the inputs in our EV vs gas cost calculator.

The short version: buy an EV and the running-cost gap works in your favor every mile; the only question is whether you drive enough, for long enough, to repay any higher sticker price. For most households that drive an average amount and keep a car several years, the answer is yes. For low-mileage drivers facing a big price premium and expensive electricity, a gas car can still be the cheaper total-cost choice.

The cost buckets

"Total cost of ownership" is more than the sticker. It breaks into six buckets, and EVs and gas cars trade wins across them:

The two buckets that reliably favor the EV — fuel and maintenance — are also the ones you pay year after year. The bucket that favors the gas car — purchase price — is a one-time hit. That structure is why EVs tend to "lose at the dealership and win in the driveway." Our calculator focuses on the two most quantifiable, source-backed buckets (fuel and purchase price) and deliberately leaves maintenance, insurance and depreciation for you to layer on, because those vary too much by model and region to default honestly.

Fuel vs charging — the biggest swing factor

Fuel is where the EV builds its lead, and it is the input most worth getting right for your situation. Two things drive it: the price of energy and how efficiently each vehicle turns it into miles.

A gas car at 30 mpg burns one gallon every 30 miles. An EV at 3.5 mi/kWh needs about 0.29 kWh per mile at the wheels — but you pay for energy drawn from the wall, and AC charging loses roughly 10 to 15% to heat and conversion (AFDC). At an 88% charging efficiency the real draw is about 0.32 kWh per mile. Put dollars on it:

That roughly 2-to-1 advantage is the engine of the whole comparison. But it is fragile in one direction: where you charge. Public DC fast charging commonly costs 2 to 3 times the home rate, which can pull the EV's effective fuel cost up toward — or past — the gas car's. If you can charge at home most of the time, the EV's fuel win holds; if you rely on public charging, model it carefully. We dig into that split in home vs public EV charging cost, and the day-to-day mechanics of charging cost in cost to charge an electric car.

Break-even: how many years or miles until the EV is cheaper

If the EV costs more to buy, the annual fuel saving has to "repay" that premium before the EV is ahead on total cost. The arithmetic is simple:

break-even years = (EV price − gas price) ÷ annual fuel saving

At 12,000 miles a year and our default prices, the annual fuel saving is about $658. Here is how the payback period changes with the price gap and with mileage, holding prices constant:

Modeling it across three mileage levels makes the pattern clear: mileage and the price gap matter far more than any single "average." A high-mileage driver repays even a $10,000 premium inside the typical life of a car; a low-mileage driver may not repay a $5,000 premium before they sell. And remember this table counts fuel savings only — adding the EV's lower maintenance, or any purchase incentive that shrinks the premium, pulls every break-even point closer.

When a gas car is still the cheaper choice

EVs are not a universal win. A gas car can come out ahead on total cost when several of these stack up:

• Low annual mileage. Few miles means a small fuel saving, so a price premium takes many years to repay.
• A large upfront price gap with no incentive. If the EV you want costs thousands more and no credit applies, the math gets long.
• Little or no home charging. Relying on public DC fast charging at 2 to 3 times the home rate erodes the per-mile advantage.
• Cheap local electricity is unavailable but cheap gas is. Your local prices can flip the per-mile comparison; always use your own numbers, not the national average.
• Short ownership. If you sell before break-even, you never collect the savings (though resale value can offset this either way).

Run your own comparison

Here is a representative case run through our calculator. A driver covers 12,000 miles a year in an EV rated at 3.5 mi/kWh versus a 30 mpg gas car, paying $0.17/kWh and $3.30/gal:

• EV energy from the wall: 12,000 ÷ 3.5 ÷ 0.88 ≈ 3,896 kWh → about $662/year.
• Gas: 12,000 ÷ 30 = 400 gallons → $1,320/year.
• Annual fuel saving ≈ $658, or about 5.5¢ vs 11¢ per mile.
• CO₂: 400 gal × 8.887 kg/gal − 3,896 kWh × 0.39 kg/kWh ≈ 2.0 tonnes saved per year.

If that EV costs $10,000 more to buy, the gap takes roughly 15 years to repay on fuel alone; at a $5,000 premium it is about 7.6 years; and if the EV is the same price or cheaper, it leads from year one. Your real answer depends on your mileage, prices and the two vehicle prices.

→ Run your numbers in the EV vs gas cost calculator to see your annual saving, break-even year, cost per mile and CO₂ avoided.

The bottom line

On running cost, the EV almost always wins: cheaper fuel when you charge at home, plus lower maintenance, mile after mile. On purchase price, the gas car often wins. Total cost of ownership comes down to whether your mileage and ownership period are long enough to let the running-cost lead repay the upfront gap — and for typical drivers who charge at home, they are. Don't trust an average; the inputs that decide it are yours. Model your own EV vs gas comparison and see exactly where your break-even lands.