State energy prices · EIA
EV charging & gas costs in Montana
Residential electricity
14.7¢/kWh
EIA average, May 2026 · 20% below the EIA U.S. average
Regular gasoline (region)
$3.96/gal
EIA weekly, Rocky Mountain (PADD 4), week ending 2026-07-20 · 1% below the EIA U.S. average
What that means per month — example vehicles
Computed from each vehicle's exact official EPA record at 12,000 miles/year, 55% city, with Montana's prices above (other fuels use dated national averages).
| Vehicle | Powertrain | Per month | Per mile |
|---|---|---|---|
| 2027 Chevrolet Equinox AWD1.5L 4-cyl · 8-speed automatic · AWD | Gasoline | $148.42 | 14.8¢/mi |
| 2027 BMW 530i Sedan2.0L 4-cyl · 8-speed automatic with select shift · RWD | Hybrid | $157.84 | 15.8¢/mi |
| 2026 BMW 550e xDrive Sedan3.0L 6-cyl · 8-speed automatic with select shift · AWD | Plug-in hybrid | $121.33 | 12.1¢/mi |
| 2027 Audi Q6 e-tron quattro (19 inch Tires)electric motor (225 and 270 kW Asynchron 3-Phase) · AWD | Electric | $47.69 | 4.8¢/mi |
These are examples, not recommendations. For your exact car, use the calculator and pick Montana in the “Price region” selector — every assumption stays editable; gasoline uses the Rocky Mountain (PADD 4) regional average because EIA publishes no weekly Montana series.