Why Your State Changes the EV Math
Washington State runs 10¢/kWh for residential electricity. Hawaii runs 40¢/kWh. California sits at 24¢/kWh. That spread — a 4x difference — completely changes the EV payback calculation. In Washington, you pay about $350/year to fuel an EV for 12,000 miles. In Hawaii, that same car costs $1,400/year to charge. Same vehicle, same mileage, four times the electricity bill.
The gas price side is also uneven. California runs $4.35/gallon. Mississippi stays under $2.90. A gas car doing 30 MPG for 12,000 miles costs $1,160/year in Mississippi and $1,740/year in California. Layer electricity costs on top and you get different EV value propositions by state.
States Where EVs Win Hardest
Washington State is the best by fuel cost math: cheap hydro power (10¢/kWh) plus relatively expensive gas ($4.00/gallon) means EVs save over $1,200/year vs. a 30 MPG gas car. Over five years, that's $6,000+ in fuel alone before incentives. Oregon and Idaho also benefit from Pacific Northwest hydro rates.
California doesn't look as strong despite high gas prices because electricity is expensive ($0.24+/kWh). The fuel savings are real but smaller than most Californians expect — roughly $900/year. California's real EV advantage is the $7,500 federal tax credit plus state rebate, which changes the total cost picture.
States Where EVs Struggle
Hawaii is the worst by fuel economics despite having no gas refineries. Electricity at 40¢/kWh means the annual fuel cost for an EV approaches what you'd pay for a gas car — the gap shrinks to under $500/year. Add the cost premium of importing EVs to the islands and the payback math gets difficult.
Southern states with cheap gas and moderate electricity rates (Alabama, Mississippi, Arkansas) also show smaller EV savings — roughly $750–$850/year vs. the national average. Not bad, but not the dramatic savings you see in the Northwest.
What the Table Doesn't Include
Fuel savings are one part. EVs also save on maintenance: no oil changes, fewer brake replacements from regenerative braking, simpler drivetrain. A typical gas car costs $1,200–$1,500/year in maintenance. EVs run $600–$800/year. That $500–$700/year advantage is consistent across all states. Add it to your fuel savings figure to get closer to total cost of ownership.