What it costs to charge a 2026 BMW i4 eDrive40 Gran Coupe (18 inch wheels) in Idaho

In Idaho, home electricity runs 12.8¢/kWh — put a 2026 BMW i4 eDrive40 Gran Coupe (18 inch wheels)'s EPA-rated 28.5 kWh/100mi against that and 100 miles costs $3.65, versus $16.02 for a gas car averaging 25.5 mpg. That works out to 77.2% cheaper per mile than gasoline in Idaho — charging at home costs a fraction of what gas would here.

2026 BMW i4 eDrive40 Gran Coupe (18 inch wheels): yearly cost in Idaho

Home charging this 2026 BMW i4 eDrive40 Gran Coupe (18 inch wheels) in Idaho runs about $548 over fueleconomy.gov's default 15,000 annual miles, versus about $2,403 for the gasoline equivalent. Call it about $1,855 saved annually, at this mileage.

Cost of a full charge

$12.16 — that's what Idaho's 12.8¢/kWh rate puts on the 95 kWh a 2026 BMW i4 eDrive40 Gran Coupe (18 inch wheels) needs for its full 333-mile EPA range.

How this compares nationally

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 BMW i4 eDrive40 Gran Coupe (18 inch wheels) in Idaho ranks 312 for cost savings versus gas — 1 being the best deal nationally. Separately, the BMW i4 eDrive40 Gran Coupe (18 inch wheels) ranks 31 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.

Line up a few Idaho electrician quotes for Level 2 install before you commit either way.

More on how this number was built

The methodology guide names the exact EIA and EPA tables behind this page's numbers. 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.