2026 BMW i4 xDrive40 Gran Coupe (19 inch Wheels): home charging cost in Montana

In Montana, home electricity runs 13.77¢/kWh — put a 2026 BMW i4 xDrive40 Gran Coupe (19 inch Wheels)'s EPA-rated 36 kWh/100mi against that and 100 miles costs $4.96, versus $16.02 for a gas car averaging 25.5 mpg. Charging at home costs a fraction of what gas would here: 69.1% less than gas per mile, here specifically.

Annual cost, at 15 thousands miles a year

Driving 15,000 miles a year — fueleconomy.gov's own default assumption — a 2026 BMW i4 xDrive40 Gran Coupe (19 inch Wheels) charged at home in Montana costs about $743/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,660 a year.

What one full charge costs

A 2026 BMW i4 xDrive40 Gran Coupe (19 inch Wheels) needs roughly 96.4 kWh to reach its EPA-rated 268-mile range, which runs about $13.28 at 13.77¢/kWh in Montana.

How this compares nationally

This combination ranks 4,301 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The BMW i4 xDrive40 Gran Coupe (19 inch Wheels) alone ranks 167 of 400 models for efficiency; Montana alone ranks 10 of 51 states for electricity price.

Next step: home charger installation

The numbers above assume Level 2 home charging is already in place — the electrical work behind that is a real, separate cost that varies by panel, wiring, and local labor rates, not something this page's per-mile math includes.

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

Where these figures come from

Every figure on this page traces to a named EIA or EPA dataset — see the methodology guide. At 13.77¢/kWh, Montana sits in the middle of the national range — the guide to why charging cost varies by state shows where.