The short answer: A 2026 Tesla Model Y Long Range AWD costs about $3.68 per 100 miles to charge at home in Idaho, and $12.02 for the energy to drive its 327-mile EPA range. That uses the August 2026 residential average of 13.37¢/kWh, up from 12.08¢/kWh in August 2025 and about 26% below the U.S. residential average of 18.16¢/kWh. The same 100 miles cost about $15.44 in a 30-mpg gas SUV at AAA’s Idaho average of $4.631 a gallon (October 28, 2026), and about $14.85 at a public DC fast charger.
EIA Table 5.6.A: EIA labels the 2026 values in this table as preliminary estimates based on a cutoff model sample from Form EIA-861M (formerly EIA-826). Values for 2025 are final. These are state or district-wide residential averages, not a household tariff. Method.
EV vs gas in Idaho: cost per 100 miles
Idaho’s regular gas averaged $4.631 a gallon on October 28, 2026, the 10th-most expensive among the 50 states and the District (AAA).
| How you fuel | Math | Per 100 mi | 12,000 mi/yr | Source |
|---|---|---|---|---|
| 2026 Tesla Model Y Long Range AWD, charged at home | 13.37¢/kWh × 27.50 kWh | $3.68 | $442 | EPA · EIA |
| 2026 Tesla Model Y Long Range AWD, public DC fast | $0.540/kWh × 27.50 kWh | $14.85 | $1,782 | Paren, U.S. average |
| 2026 Toyota RAV4 (2.5 L hybrid, 2WD) | $4.631/gal ÷ 43 mpg | $10.77 | $1,292 | EPA · AAA |
| 2026 Honda CR-V FWD (1.5 L turbo, gas) | $4.631/gal ÷ 30 mpg | $15.44 | $1,852 | EPA · AAA |
- Home charging vs the gas SUV: about $1,411 a year less at 12,000 miles. Home charging stays cheaper until electricity reaches about 56.14¢/kWh, 4.2× the state average.
- Home charging vs the hybrid: home charging is about $851 a year cheaper. The break-even against the hybrid is 39.16¢/kWh.
- Public fast charging vs gas: relying on DC fast charging costs less than the gas SUV at these prices ($14.85 vs $15.44 per 100 miles).
Checked on the Model Y: 27.50 kWh/100 mi × $0.1337/kWh = 3.6767, which rounds to $3.68 per 100 miles. The gas SUV is 100 ÷ 30 mpg × $4.631 = 15.4373, or $15.44. The break-even electricity price is $15.44 ÷ 27.50 kWh = 56.14¢ per kWh.
Utility EV and time-of-use prices in Idaho
Prices quoted from each utility’s tariff or rate page. Fixed charges, riders and taxes are extra unless the line says otherwise.
- Idaho Power, Time-of-Use Plan: Off-peak is 7.4797¢/kWh in summer (11 p.m. to 3 p.m. Monday to Saturday) and 9.2231¢ from October to May. Sundays and holidays are off-peak all day. Idaho Power, Time-of-Use Plan, checked Nov 2026.
For the 27.50 kWh a Model Y uses per 100 miles: about $2.06 at Idaho Power’s summer off-peak price (7.4797¢). That is before fixed charges and riders; the state average works out to $3.68.
AFDC’s utility records (program types, no prices) list 1 utility in Idaho with an EV rate or managed charging:
- Rocky Mountain Power (EV rate) · site
Have an off-peak price? Put it in the calculator.
EV rebates and tax credits in Idaho
We found no open state EV rebate or tax credit in Idaho, and no utility charger rebate we could verify, when we checked in November 2026.
Federal credits are gone: 30D and 25E for vehicles acquired after Sept. 30, 2025, and 30C for chargers placed in service after June 30, 2026 (IRS: new, used, charger).
Public charging in Idaho
The AFDC counted 744 public charging ports at 258 locations in Idaho on October 28, 2026: 427 Level 2 and 317 DC fast. AFDC also counts about 14,100 battery-electric vehicles registered in Idaho through 2025 (0.7% of light-duty registrations). That is about 19.0 EVs per public port, against 21.7 nationally, the 24th-most EVs per port among the 50 states and the District.
Paren’s Q3 2026 report has no Idaho figure, so fast-charging math here uses its U.S. average of $0.540 per kWh.
Stations that bill energy delivered to the car charge less than the EPA wall figure. As a rough estimate (wall energy × 0.894, a Level 2 efficiency from Sears et al., 2014), the Model Y comes to about $13.28 per 100 miles at $0.540/kWh.
Cost to charge five common EVs in Idaho
| Vehicle | EPA kWh/100 mi | EPA range | Home / 100 mi | Home full charge | Public DC / 100 mi |
|---|---|---|---|---|---|
| 2026 Tesla Model Y Long Range AWD | 27.50 | 327 mi | $3.68 | $12.02 | $14.85 |
| 2026 Tesla Model 3 Standard RWD | 24.30 | 321 mi | $3.25 | $10.43 | $13.12 |
| 2026 Chevrolet Equinox EV FWD | 31.08 | 319 mi | $4.16 | $13.26 | $16.78 |
| 2026 Hyundai Ioniq 5 RWD | 30.00 | 318 mi | $4.01 | $12.75 | $16.20 |
| 2026 Ford Mustang Mach-E RWD | 31.44 | 260 mi | $4.20 | $10.93 | $16.98 |
Where Idaho sits
Idaho is in the Mountain census division.
States next to Idaho on price
Also in Mountain
All 50 states and D.C., ranked
Open the calculator at 13.37¢/kWh
Related: what a Level 2 charger costs to install in Idaho, home charger rebates in Idaho, the extra EV registration fee in Idaho, whether your panel can take a Level 2 circuit, home charger comparison, and all free EV tools.
Pricing a Level 2 charger? See the charger guide and the ChargePoint Home Flex review.
Check Home Flex on AmazonFAQ: charging an EV in Idaho
How much does it cost to charge an EV at home in Idaho?
About $3.68 per 100 miles in a 2026 Tesla Model Y Long Range AWD at 13.37¢/kWh (EIA, August 2026), and $12.02 for its full 327-mile range. On Idaho Power’s summer off-peak price of 7.4797¢ it falls to about $2.06 per 100 miles before fixed charges.
Is charging an EV cheaper than buying gas in Idaho?
Yes, at home: $3.68 per 100 miles for the Model Y versus $15.44 for a 30-mpg gas SUV and $10.77 for a 43-mpg hybrid, with regular at $4.631 (AAA, October 28, 2026). The SUV only wins above 56.14¢/kWh.
Is public DC fast charging more expensive than gas in Idaho?
No. $14.85 per 100 miles at $0.540/kWh (Paren, U.S. average) is less than the gas SUV’s $15.44 and $11.17 more than home charging.
Do Idaho utilities offer EV charging rates?
Idaho Power, Time-of-Use Plan: Off-peak is 7.4797¢/kWh in summer (11 p.m. to 3 p.m. Monday to Saturday) and 9.2231¢ from October to May. Sundays and holidays are off-peak all day.
What EV rebates or tax credits are available in Idaho?
None that we could verify: in November 2026 we found no open state EV rebate or tax credit in Idaho and no utility charger rebate with a published amount. The federal purchase and charger credits have also ended.
How many public EV chargers are there in Idaho?
The AFDC station count for October 28, 2026 shows 258 public charging locations in Idaho with 744 ports: 427 Level 2 and 317 DC fast. AFDC counts about 14,100 battery-electric vehicles registered there through 2025, or about 19.0 EVs per public port.
More sources
Electricity, gas, vehicle and fast-charging sources are linked in the tables above.
- AFDC station counts (October 28, 2026), registrations (2025), and utility records (2026-10-28).
- NOAA NCEI Climate at a Glance, statewide mean temperature: Idaho January 25.1°F, July 66.4°F (1991–2020 averages).
- AAA, cold weather and EV range (Feb. 7, 2019).
- EIA state generation data, 2024: hydropower 45.7%, natural gas 31.4%, wind 15.1%, solar 5.1%.