Charging a 2026 Tesla Model 3 Standard RWD at home in Montana

A 2026 Tesla Model 3 Standard RWD draws 24.3 kWh per 100 miles per the EPA; at Montana's 13.77¢/kWh residential rate that's $3.35 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. That works out to 79.1% cheaper per mile than gasoline in Montana — charging at home costs a fraction of what gas would here.

Annual cost, at 15 thousands miles a year

Montana owners putting 15,000 annual miles on a 2026 Tesla Model 3 Standard RWD spend about $502 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,901 saved annually, at this mileage.

Filling up the 2026 Tesla Model 3 Standard RWD, in dollars

At Montana's rate, fully covering this 2026 Tesla Model 3 Standard RWD's 321-mile EPA range costs about $10.74 (78 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 Tesla Model 3 Standard RWD in Montana ranks 76 for cost savings versus gas — 1 being the best deal nationally. Separately, the Tesla Model 3 Standard RWD ranks 2 of 400 EV models for raw efficiency, and Montana ranks 10 of 51 for cheapest residential electricity.

Before you install a home charger in Montana

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 Tesla Model 3 Standard RWD's cost in Montana. At 13.77¢/kWh, Montana sits in the middle of the national range — the guide to why charging cost varies by state shows where.