What it costs to charge a 2027 Rivian R1T Premium (20in) in Montana

In Montana, home electricity runs 13.77¢/kWh — put a 2027 Rivian R1T Premium (20in)'s EPA-rated 42.9 kWh/100mi against that and 100 miles costs $5.9, versus $16.02 for a gas car averaging 25.5 mpg. That works out to 63.1% cheaper per mile than gasoline in Montana — charging at home is much cheaper than gas here.

Annual cost, at 15 thousands miles a year

Home charging this 2027 Rivian R1T Premium (20in) in Montana runs about $886 over fueleconomy.gov's default 15,000 annual miles, versus about $2,403 for the gasoline equivalent. Call it about $1,517 saved annually, at this mileage.

Filling up the 2027 Rivian R1T Premium (20in), in dollars

$17.71 — that's what Montana's 13.77¢/kWh rate puts on the 128.6 kWh a 2027 Rivian R1T Premium (20in) needs for its full 300-mile EPA range.

Where this ranks

Among all 20,400 state-and-model combinations this site tracks, charging a 2027 Rivian R1T Premium (20in) in Montana ranks 8,977 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1T Premium (20in) ranks 315 of 400 EV models for raw efficiency, and Montana ranks 10 of 51 for cheapest residential electricity.

Getting set up to charge a 2027 Rivian R1T Premium (20in) at home

Everything above is the per-mile and per-year cost once a home charger exists — getting one installed is a separate electrical job whose price depends on your panel and wiring, not the state average used here.

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

More on how this number was built

The methodology guide names the exact EIA and EPA tables behind this page's numbers. Montana's 13.77¢/kWh rate ranks 10 of 51 states; the state rate guide lays out the full spread.