Charging a 2026 Rivian R1T All-Terrain Performance Dual Large (20in) at home in Montana

In Montana, home electricity runs 13.77¢/kWh — put a 2026 Rivian R1T All-Terrain Performance Dual Large (20in)'s EPA-rated 44.4 kWh/100mi against that and 100 miles costs $6.11, versus $16.02 for a gas car averaging 25.5 mpg. That works out to 61.9% cheaper per mile than gasoline in Montana — charging at home is much cheaper than gas here.

Annual cost, at 15 thousands miles a year

Montana owners putting 15,000 annual miles on a 2026 Rivian R1T All-Terrain Performance Dual Large (20in) spend about $916 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,487 saved annually, at this mileage.

Cost of a full charge

At Montana's rate, fully covering this 2026 Rivian R1T All-Terrain Performance Dual Large (20in)'s 289-mile EPA range costs about $17.65 (128.2 kWh) — the energy the EPA test actually used, not the battery's rated size.

How this compares nationally

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Rivian R1T All-Terrain Performance Dual Large (20in) in Montana ranks 9,907 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1T All-Terrain Performance Dual Large (20in) ranks 347 of 400 EV models for raw efficiency, and Montana ranks 10 of 51 for cheapest residential electricity.

Next step: home charger installation

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.

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

More on how this number was built

See the methodology guide for exactly which EIA and EPA figures feed 2026 Rivian R1T All-Terrain Performance Dual Large (20in)'s cost in Montana. Curious how Montana's 13.77¢/kWh compares? The guide to charging cost by state ranks every state side by side.