What it costs to charge a 2026 BMW i4 xDrive40 Gran Coupe (18 inch Wheels) in Montana

At Montana's residential electricity rate of 13.77¢/kWh, a 2026 BMW i4 xDrive40 Gran Coupe (18 inch Wheels) (rated 33.4 kWh per 100 miles by the EPA) costs $4.6 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 71.3% cheaper per mile than gasoline in Montana — charging at home costs a fraction of what gas would here.

2026 BMW i4 xDrive40 Gran Coupe (18 inch Wheels): yearly cost in Montana

Home charging this 2026 BMW i4 xDrive40 Gran Coupe (18 inch Wheels) in Montana runs about $690 over fueleconomy.gov's default 15,000 annual miles, versus about $2,403 for the gasoline equivalent. Call it about $1,713 saved annually, at this mileage.

Cost of a full charge

$13.2 — that's what Montana's 13.77¢/kWh rate puts on the 95.9 kWh a 2026 BMW i4 xDrive40 Gran Coupe (18 inch Wheels) needs for its full 287-mile EPA range.

Where this ranks

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 BMW i4 xDrive40 Gran Coupe (18 inch Wheels) in Montana ranks 2,770 for cost savings versus gas — 1 being the best deal nationally. Separately, the BMW i4 xDrive40 Gran Coupe (18 inch Wheels) ranks 114 of 400 EV models for raw efficiency, and Montana ranks 10 of 51 for cheapest residential electricity.

Getting set up to charge a 2026 BMW i4 xDrive40 Gran Coupe (18 inch Wheels) at home

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 Montana 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. Curious how Montana's 13.77¢/kWh compares? The guide to charging cost by state ranks every state side by side.