What is the cheapest state to charge an electric car?

The states with the lowest residential electricity rates are cheapest to charge, led by North Dakota, Idaho, Wyoming, all near or below 11.5¢/kWh.

What is the most expensive state to charge an EV?

Hawaii is by far the most expensive at over 41¢/kWh, followed by California, Massachusetts, Connecticut, where home charging can cost 2–3× the national average.

How is EV charging cost per state calculated?

Cost = usable battery kWh × the state’s residential rate (¢/kWh) ÷ 100 for a full charge. Cost per mile = the monthly cost divided by miles, using the car’s EPA efficiency. WattSpend uses EIA state averages.

EV Charging Cost by State (2026)

Home charging cost varies more by state than by car, the residential electricity rate does most of the work. Compare every US state (plus DC), or open your state for its own calculator and cost-by-model table.

Quick answer

Charging a typical EV at home ranges from about $31/month in the cheapest states to over $117/month in Hawaii, at 1,000 miles a month. The US average is about $47/month.

Cheapest to charge

North Dakota10.9¢ · $31/mo Idaho11.4¢ · $33/mo Wyoming11.5¢ · $33/mo Utah11.6¢ · $33/mo Nebraska11.7¢ · $33/mo

Most expensive to charge

Hawaii41.0¢ · $117/mo California31.8¢ · $91/mo Massachusetts30.5¢ · $87/mo Connecticut29.5¢ · $84/mo Rhode Island28.0¢ · $80/mo

Want the full ranking with regional analysis and why rates differ? Read the data study: The Cheapest and Most Expensive States to Charge an EV (2026).

EV Charging Cost by State (2026)

Every state