2026 Tesla Model 3 Premium RWD: home charging cost in Idaho

In Idaho, home electricity runs 12.8¢/kWh — put a 2026 Tesla Model 3 Premium RWD's EPA-rated 24.6 kWh/100mi against that and 100 miles costs $3.15, versus $16.02 for a gas car averaging 25.5 mpg. Charging at home costs a fraction of what gas would here: 80.3% less than gas per mile, here specifically.

What a year of driving costs

Driving 15,000 miles a year — fueleconomy.gov's own default assumption — a 2026 Tesla Model 3 Premium RWD charged at home in Idaho costs about $473/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,930 a year.

What one full charge costs

A 2026 Tesla Model 3 Premium RWD needs roughly 89.4 kWh to reach its EPA-rated 363-mile range, which runs about $11.45 at 12.8¢/kWh in Idaho.

Where this ranks

This combination ranks 22 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Tesla Model 3 Premium RWD alone ranks 4 of 400 models for efficiency; Idaho alone ranks 3 of 51 states for electricity price.

Getting set up to charge a 2026 Tesla Model 3 Premium RWD at home

The numbers above assume Level 2 home charging is already in place — the electrical work behind that is a real, separate cost that varies by panel, wiring, and local labor rates, not something this page's per-mile math includes.

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

Where these figures come from

Every figure on this page traces to a named EIA or EPA dataset — see the methodology guide. 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.