What it costs to charge a 2027 Rivian R1T Performance (20in AT) in Idaho

At Idaho's residential electricity rate of 12.8¢/kWh, a 2027 Rivian R1T Performance (20in AT) (rated 49.8 kWh per 100 miles by the EPA) costs $6.38 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 60.2% cheaper per mile than gasoline in Idaho — charging at home is much cheaper than gas here.

Annual cost, at 15 thousands miles a year

Home charging this 2027 Rivian R1T Performance (20in AT) in Idaho runs about $957 over fueleconomy.gov's default 15,000 annual miles, versus about $2,403 for the gasoline equivalent. Call it about $1,446 saved annually, at this mileage.

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

$20.99 — that's what Idaho's 12.8¢/kWh rate puts on the 164 kWh a 2027 Rivian R1T Performance (20in AT) needs for its full 329-mile EPA range.

Where this ranks

Among all 20,400 state-and-model combinations this site tracks, charging a 2027 Rivian R1T Performance (20in AT) in Idaho ranks 10,959 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1T Performance (20in AT) ranks 387 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.

Ask a licensed Idaho electrician to quote the install before this math becomes a real decision.

More on how this number was built

The methodology guide names the exact EIA and EPA tables behind this page's numbers. 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.