The national average EV saves approximately $800–1,400 per year on fuel compared to a gas car — but the actual figure varies dramatically by state, driving habits, and which vehicles you're comparing. In Louisiana, where electricity is cheap and gas is moderate, an EV saves nearly $1,600/year. In Hawaii, where electricity is expensive, the savings drop to $200–400. Understanding the math behind these numbers lets you calculate exactly what switching would mean for your situation.

The Core Formula: How EV Fuel Savings Are Calculated

Comparing fuel costs comes down to cost per mile for each vehicle type. The calculation requires four numbers:

  • Your annual miles driven
  • Your gas car's MPG (or the car you're comparing against)
  • Your local gas price per gallon
  • Your EV's efficiency in miles per kWh (or the EV you're considering)
  • Your electricity rate in ¢/kWh

Gas car annual fuel cost: (Annual miles ÷ MPG) × Gas price/gallon

EV annual fuel cost: (Annual miles ÷ Miles per kWh) × Electricity rate/kWh

Annual savings: Gas cost − EV cost

Example: 12,000 miles/year, comparing a 28 MPG gas sedan to a Tesla Model 3 (4.0 miles/kWh) in an average state ($3.50/gallon gas, $0.13/kWh electricity):

  • Gas cost: (12,000 ÷ 28) × $3.50 = $1,500/year
  • EV cost: (12,000 ÷ 4.0) × $0.13 = $390/year
  • Annual savings: $1,110/year

EV Fuel Savings by State

State electricity and gas prices vary enough to swing annual savings by $1,000 or more. The comparison below uses 12,000 miles/year, a 28 MPG gas car, and a 4.0 miles/kWh EV (roughly equivalent to a Model 3 or Chevy Equinox EV in typical conditions).

Highest savings states (cheap electricity + moderate/high gas prices):

  • Louisiana: ~$0.09/kWh electricity, ~$3.30/gallon → EV saves ~$1,570/year
  • Oklahoma: ~$0.10/kWh, ~$3.20/gallon → EV saves ~$1,470/year
  • Arkansas: ~$0.10/kWh, ~$3.25/gallon → EV saves ~$1,460/year
  • Washington: ~$0.10/kWh, ~$3.80/gallon → EV saves ~$1,325/year (lower gas consumption offset by lower rate)
  • Texas: ~$0.11/kWh, ~$3.10/gallon → EV saves ~$1,380/year

Moderate savings states (near national average):

  • Ohio: ~$0.12/kWh, ~$3.40/gallon → EV saves ~$1,140/year
  • Georgia: ~$0.12/kWh, ~$3.20/gallon → EV saves ~$1,060/year
  • Florida: ~$0.13/kWh, ~$3.30/gallon → EV saves ~$1,020/year
  • Colorado: ~$0.13/kWh, ~$3.60/gallon → EV saves ~$1,110/year

Lower savings states (expensive electricity):

  • California: ~$0.30/kWh, ~$4.80/gallon → EV saves ~$1,050/year (high electricity partially offset by high gas)
  • New York: ~$0.22/kWh, ~$3.80/gallon → EV saves ~$970/year
  • Massachusetts: ~$0.24/kWh, ~$3.60/gallon → EV saves ~$840/year
  • Connecticut: ~$0.26/kWh, ~$3.70/gallon → EV saves ~$780/year
  • Hawaii: ~$0.43/kWh, ~$4.80/gallon → EV saves ~$270/year (expensive electricity heavily cuts into savings)

California's high electricity rate partially explains why EV fuel savings there are roughly average despite having the nation's highest gas prices — the two offset each other more than most people realize.

How Driving Habits Change the Math

Annual mileage is the single biggest multiplier on fuel savings. The more you drive, the more every cent of per-mile savings compounds:

  • 6,000 miles/year (low mileage): Average savings ~$450–700/year
  • 12,000 miles/year (national average): Average savings ~$800–1,200/year
  • 18,000 miles/year (high mileage): Average savings ~$1,200–1,800/year
  • 25,000 miles/year (very high mileage): Average savings ~$1,700–2,500/year

For high-mileage drivers — salespeople, contractors, those with long commutes — EV fuel savings are substantial enough to meaningfully accelerate the payback on the typically higher purchase price. For low-mileage drivers (under 6,000 miles/year), fuel savings alone may not justify the price premium on the vehicle.

Charging at Home vs. Public Charging: The Cost Difference

The figures above assume home charging, which is how roughly 80% of EV miles are charged. Public charging costs significantly more:

  • Home Level 2 charging: Typically $0.10–0.16/kWh at residential rates. Some utilities offer EV-specific overnight rates of $0.06–0.09/kWh, reducing annual fuel costs further.
  • Public DC fast charging (Tesla Supercharger, Electrify America, etc.): Typically $0.28–0.45/kWh, or 2–4x home charging rates. At $0.35/kWh, the 4.0 miles/kWh EV example costs $0.088/mile — still cheaper than gas, but the gap narrows considerably.
  • Workplace charging (free): Some employers offer free Level 2 charging. At 30 miles of range added per day free, that's $0–200/year in free fuel depending on your home rate.

If you lack access to home charging and primarily rely on public DC fast charging, your EV fuel cost roughly doubles compared to home charging. The fuel cost advantage over gas narrows to $300–600/year rather than $800–1,200, which changes the payback calculus on a more expensive EV purchase significantly.

What About the Vehicle Price Premium?

EV fuel savings are real, but they need to be weighed against the purchase price difference to determine overall financial impact. As of 2026, the average new EV costs roughly $2,000–8,000 more than a comparable gas vehicle before incentives. The federal Clean Vehicle Credit provides up to $7,500 for qualifying new EVs purchased by income-eligible buyers ($150,000 for single filers), which substantially closes or eliminates this gap for many buyers. Used EVs qualifying for the $4,000 Used Clean Vehicle Credit narrow the gap further.

At $1,000/year in fuel savings and a $5,000 purchase premium (after the federal credit), payback on fuel alone takes 5 years. Add maintenance savings — EVs typically save $300–500/year on oil changes, brake wear, and related service versus gas cars — and the combined payback period drops to 3–4 years for average-mileage drivers.

For high-mileage drivers saving $1,500/year in fuel and $400/year in maintenance, the combined $1,900/year savings against a $5,000 premium delivers payback in under 3 years, making the financial case straightforward.

Carbon Savings Alongside Fuel Savings

Beyond the financial picture, fuel savings from an EV come alongside significant carbon reductions. The average U.S. grid in 2026 emits roughly 0.38 lbs of CO₂ per kWh. A 4.0 miles/kWh EV driven 12,000 miles/year uses 3,000 kWh, producing about 570 kg of CO₂. A 28 MPG gas car driven 12,000 miles produces about 3,900 kg of CO₂ — nearly 7x more.

In states with cleaner grids — Washington, Oregon, California, New York, New England — EV emissions are even lower. In coal-heavy grids (parts of the Midwest and South), the carbon advantage of EVs is smaller but still significant. Use our Car vs EV Carbon Calculator to see the lifetime carbon comparison for your specific state and vehicles.

Calculating Your Specific Savings

The fastest way to find your number: use the formula above with your actual gas price (check GasBuddy or your most recent fill-up), your current car's MPG (from the window sticker or fueleconomy.gov), your electricity rate (from your most recent bill), and your annual mileage (from your odometer or registration renewal).

For a complete comparison including purchase price, financing, insurance, maintenance, and depreciation over 5 years, see our EV vs Gas True Cost of Ownership guide, which walks through every cost category with real numbers.