EVs / Charging cost / Montana / BMW i5

Cost to charge a BMW i5 in Montana

$14.39full charge

The i5 eDrive40 (84 kWh) costs about $14.39 to charge fully at Montana's average home rate of 15.57¢/kWh, including about 10% charging loss (92.4 kWh from the wall). That is $4.64 per 100 miles.

EIA residential average, Montana, 2026-08 (latest in this book). No Montana gasoline series, so this uses PADD 4 regular, week of Oct 19, 2026.

BMW i5 specs

By trim · per 100 mi
eDrive40310 mi$4.64
xDrive40278 mi$5.18
M60277 mi$5.19
Nearby states · per 100 mi
Montana15.57¢$4.64
Idaho13.37¢$3.99North Dakota13.31¢$3.97South Dakota15.15¢$4.52Wyoming14.43¢$4.30
Questions
Is it cheaper than gas in Montana?

At 1,000 miles a month and 30 mpg, home charging costs $46.41 and the gas car costs $148.93. The EV saves $102.52 a month at $4.468/gal. Both miles and mpg are editable on the calculator.

How long does a full charge take?

The listed DC fast-charge time is 10–80% in 30 min at up to 205 kW. A full home charge is a different session. This page prices the energy from the wall, not how long a Level 2 charger takes.

What about public fast charging?

This page uses the residential rate. Public fast-charging prices are a separate scenario and are not included.

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