What it costs to charge a 2026 Rivian R1T Dual Standard (22in) in Idaho

At Idaho's residential electricity rate of 12.8¢/kWh, a 2026 Rivian R1T Dual Standard (22in) (rated 39.9 kWh per 100 miles by the EPA) costs $5.11 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. That works out to 68.1% cheaper per mile than gasoline in Idaho — charging at home costs a fraction of what gas would here.

Annual cost, at 15 thousands miles a year

Home charging this 2026 Rivian R1T Dual Standard (22in) in Idaho runs about $766 over fueleconomy.gov's default 15,000 annual miles, versus about $2,403 for the gasoline equivalent. Call it about $1,637 saved annually, at this mileage.

Cost of a full charge

$13.78 — that's what Idaho's 12.8¢/kWh rate puts on the 107.7 kWh a 2026 Rivian R1T Dual Standard (22in) needs for its full 270-mile EPA range.

How this compares nationally

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Rivian R1T Dual Standard (22in) in Idaho ranks 5,017 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1T Dual Standard (22in) ranks 263 of 400 EV models for raw efficiency, and Idaho ranks 3 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 Idaho 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 Dual Standard (22in)'s cost in Idaho. Idaho is one of the cheapest states for home electricity — the guide to why the cost varies so much by state covers what drives that.