Montana home charging cost for the 2026 BMW i4 eDrive40 Gran Coupe (18 inch wheels)

A 2026 BMW i4 eDrive40 Gran Coupe (18 inch wheels) draws 28.5 kWh per 100 miles per the EPA; at Montana's 13.77¢/kWh residential rate that's $3.93 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. Charging at home costs a fraction of what gas would here: 75.5% less than gas per mile, here specifically.

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

At fueleconomy.gov's default of 15,000 annual miles, the 2026 BMW i4 eDrive40 Gran Coupe (18 inch wheels) costs roughly $589 a year to charge at home in Montana, against roughly $2,403 a year for an equivalent gas car. That's a savings of about $1,814 a year.

Cost of a full charge

Covering the 2026 BMW i4 eDrive40 Gran Coupe (18 inch wheels)'s EPA-rated 333-mile range takes about 95 kWh, which costs about $13.08 at Montana's residential rate — figured from the EPA's own combined range and consumption numbers, not the pack's nameplate capacity.

2026 BMW i4 eDrive40 Gran Coupe (18 inch wheels) in Montana, ranked

This combination ranks 775 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The BMW i4 eDrive40 Gran Coupe (18 inch wheels) alone ranks 31 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.

Get quotes from local electricians for Level 2 charger installation in Montana before deciding.

Where these figures come from

The methodology guide names the exact EIA and EPA tables behind this page's numbers. Curious how Montana's 13.77¢/kWh compares? The guide to charging cost by state ranks every state side by side.