2026 BMW iX xDrive45 (23 inch Wheels): home charging cost in Montana

At Montana's residential electricity rate of 13.77¢/kWh, a 2026 BMW iX xDrive45 (23 inch Wheels) (rated 38.6 kWh per 100 miles by the EPA) costs $5.32 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. Charging at home costs a fraction of what gas would here: 66.8% 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 iX xDrive45 (23 inch Wheels) charged at home in Montana costs about $798/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,605 a year.

What one full charge costs

A 2026 BMW iX xDrive45 (23 inch Wheels) needs roughly 112.1 kWh to reach its EPA-rated 290-mile range, which runs about $15.43 at 13.77¢/kWh in Montana.

How this compares nationally

This combination ranks 6,072 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The BMW iX xDrive45 (23 inch Wheels) alone ranks 230 of 400 models for efficiency; Montana alone ranks 10 of 51 states for electricity price.

Getting set up to charge a 2026 BMW iX xDrive45 (23 inch Wheels) at home

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

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.