What it costs to charge a 2026 Ford Mustang Mach-E Rally in Idaho

At Idaho's residential electricity rate of 12.8¢/kWh, a 2026 Ford Mustang Mach-E Rally (rated 40.2 kWh per 100 miles by the EPA) costs $5.14 to drive 100 miles on home charging, against $16.02 for the same distance in a car averaging 25.5 mpg on gasoline at $4.085/gallon. That works out to 67.9% cheaper per mile than gasoline in Idaho — charging at home costs a fraction of what gas would here.

2026 Ford Mustang Mach-E Rally: yearly cost in Idaho

Home charging this 2026 Ford Mustang Mach-E Rally in Idaho runs about $771 over fueleconomy.gov's default 15,000 annual miles, versus about $2,403 for the gasoline equivalent. Call it about $1,632 saved annually, at this mileage.

What one full charge costs

$13.11 — that's what Idaho's 12.8¢/kWh rate puts on the 102.4 kWh a 2026 Ford Mustang Mach-E Rally needs for its full 255-mile EPA range.

Where this ranks

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Ford Mustang Mach-E Rally in Idaho ranks 5,179 for cost savings versus gas — 1 being the best deal nationally. Separately, the Ford Mustang Mach-E Rally ranks 271 of 400 EV models for raw efficiency, and Idaho ranks 3 of 51 for cheapest residential electricity.

Before you install a home charger in Idaho

Everything above is the per-mile and per-year cost once a home charger exists — getting one installed is a separate electrical job whose price depends on your panel and wiring, not the state average used here.

Ask a licensed Idaho electrician to quote the install before this math becomes a real decision.

More on how this number was built

Every figure on this page traces to a named EIA or EPA dataset — see the methodology guide. Idaho is one of the cheapest states for home electricity — the guide to why the cost varies so much by state covers what drives that.