What it costs to charge a 2027 Hyundai Ioniq 9 RWD in Montana

A 2027 Hyundai Ioniq 9 RWD draws 37 kWh per 100 miles per the EPA; at Montana's 13.77¢/kWh residential rate that's $5.09 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. That works out to 68.2% cheaper per mile than gasoline in Montana — charging at home costs a fraction of what gas would here.

What a year of driving costs

Home charging this 2027 Hyundai Ioniq 9 RWD in Montana runs about $764 over fueleconomy.gov's default 15,000 annual miles, versus about $2,403 for the gasoline equivalent. Call it about $1,639 saved annually, at this mileage.

What one full charge costs

$17.07 — that's what Montana's 13.77¢/kWh rate puts on the 124 kWh a 2027 Hyundai Ioniq 9 RWD needs for its full 335-mile EPA range.

2027 Hyundai Ioniq 9 RWD in Montana, ranked

Among all 20,400 state-and-model combinations this site tracks, charging a 2027 Hyundai Ioniq 9 RWD in Montana ranks 4,961 for cost savings versus gas — 1 being the best deal nationally. Separately, the Hyundai Ioniq 9 RWD ranks 193 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

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.