2026 Rivian R1T Dual Standard (20in): home charging cost in Montana

At Montana's residential electricity rate of 13.77¢/kWh, a 2026 Rivian R1T Dual Standard (20in) (rated 42.9 kWh per 100 miles by the EPA) costs $5.9 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 is much cheaper than gas here: 63.2% less than gas per mile, here specifically.

What a year of driving costs

Driving 15,000 miles a year — fueleconomy.gov's own default assumption — a 2026 Rivian R1T Dual Standard (20in) charged at home in Montana costs about $885/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,517 a year.

Filling up the 2026 Rivian R1T Dual Standard (20in), in dollars

A 2026 Rivian R1T Dual Standard (20in) needs roughly 110.6 kWh to reach its EPA-rated 258-mile range, which runs about $15.23 at 13.77¢/kWh in Montana.

Where this ranks

This combination ranks 8,911 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1T Dual Standard (20in) alone ranks 313 of 400 models for efficiency; Montana alone ranks 10 of 51 states for electricity price.

Getting set up to charge a 2026 Rivian R1T Dual Standard (20in) 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.

Line up a few Montana electrician quotes for Level 2 install before you commit either way.

Where these figures come from

Every figure on this page traces to a named EIA or EPA dataset — see the methodology guide. At 13.77¢/kWh, Montana sits in the middle of the national range — the guide to why charging cost varies by state shows where.