All states · Gas October 6, 2026 · Electricity July 2026
Charging an EV at home in Idaho costs the same per mile as buying gas at $1.11 a gallon. Regular gas averaged $4.94 on October 6, 2026, so 1,000 miles costs about $41 to charge and $183 in gas: roughly $142 a month back in your pocket, or $1,702 a year.
Idaho has no open EV purchase incentive right now; here is what is left and what closed, last reviewed October 2026. What is left in Idaho.
Regular gas averages $4.94 a gallon (AAA, October 6, 2026), 13% above the $4.37 national average, the 45th cheapest of 51. A 27 mpg car burns about 444 gallons over 12,000 miles, roughly $2,196 a year.
Gas would have to fall to about $1.11 a gallon before that car costs less per mile than charging at home in Idaho.
Home electricity averages 13.7 cents per kWh (EIA, July 2026), 25% below the 18.3-cent national average. That makes Idaho the 6th cheapest of 51 places to charge at home (46th most expensive).
The rate is up 11.8% from a year ago (12.3 to 13.7 cents). At today's rate, 12,000 miles a year costs about $494 to charge at home, the same per mile as a gas car that gets 120 mpg.
Idaho charges EV owners an extra $140/yr at registration, the state's answer to lost gas-tax revenue. Against the $1,702 a year you save on fuel at 12,000 miles, a fee of $140 takes 8%, leaving about $1,562 a year.
See every state's EV fee, ranked
Same 1,000 miles a month, same car, each state's own prices. Idaho saves $142 a month.
Gas prices jumped in 2026 when the war with Iran disrupted oil shipping through the Strait of Hormuz. Home electricity is priced by utilities under state regulators and moves far more slowly, so the gap tends to widen when gas spikes. For a 27 mpg car to cost less per mile than charging at home in Idaho, gas would have to fall below $1.11 a gallon.
Why an EV opts you out of gas spikes · Is an EV cheaper than gas right now? Every state
We assume 1,000 miles a month, a typical new EV that uses 30 kWh per 100 miles, a 27 mpg gas car, and home charging at Idaho's average residential rate. Your own miles, car and utility will move these numbers, so treat this as the honest average, not your bill.
Sources: EIA Electric Power Monthly, Table 5.6.A (residential average), AAA state gas price averages (regular unleaded)
Use the savings calculator, check Idaho EV incentives, or see which EVs fit how you drive.
Idaho's average residential electricity rate is 13.7 cents per kWh (EIA, July 2026). A typical new EV uses about 30 kWh per 100 miles, so 100 miles costs about $4.12 and 1,000 miles costs about $41 when you charge at home.
Yes, to fuel. Charging at home costs the same per mile as gas at $1.11 a gallon. With regular gas at $4.94 a gallon (AAA, October 6, 2026), 1,000 miles in a 27 mpg gas car costs about $183, versus $41 for an EV. That is roughly $142 a month, or $1,702 a year.
About $1.11 a gallon. Below that price, a 27 mpg gas car costs less per mile than charging at home at Idaho's average rate. Gas is $4.94 today, so home charging currently costs about the same per mile as a gas car that gets 120 mpg.
Idaho adds an EV registration fee of $140/yr. It is the state's answer to lost gas-tax revenue, so include it when you compare yearly costs. Our Idaho incentives page covers it along with the rebates that are still available.
They assume home charging at the state average residential rate, a typical new EV and a 27 mpg gas car. Public fast charging usually costs more than charging at home, and some utilities offer cheaper overnight rates. Your own miles, car and utility matter, so run your own numbers in the savings calculator.
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