BEV: $140.00/year ($11.67/month)
PHEV: $75.00/year ($6.25/month)
Idaho EV Charging Costs (2026)
Data updated: May 19, 2026
Idaho electricity pricing is utility-territory driven, and home charging is usually most affordable when drivers use off-peak windows. Idaho Power serves much of southern Idaho and eastern Oregon, while Rocky Mountain Power serves separate Idaho territory under IPUC-approved tariffs; many rural areas are served by electric cooperatives and municipal systems on Idaho's official utility maps. Idaho's hydro-heavy generation mix supports relatively stable home-charging costs in many parts of the state. EV owners should model cost from their actual utility tariff and charging schedule, not from a single statewide assumption.
Average Rate
$0.12/kWh
Rank #3 out of 50
EV Adoption
2.1%
State adoption estimate
Idaho Electricity Rates
Current rates by utility territory, with EV program details.
$0.12/kWh
$0.06/kWh below US average
Public Level 2 (est.): $0.29/kWh ($0.24-$0.37/kWh)
Public DC fast (est.): $0.45/kWh ($0.40-$0.54/kWh)
Estimated public charging prices derived from local electricity rates. Actual prices vary by network, location, and fees.
Many utilities offer off-peak EV charging options that can lower effective charging costs.
| Utility | Avg Rate |
|---|---|
| Idaho Power | $0.09933-$0.14619/kWh (tiered seasonal energy) + $15/mo service |
| Rocky Mountain Power | $0.10860-$0.14592/kWh (Schedule 1 energy) + $20.75/mo service; TOU Schedule 36: $0.06997-$0.20106/kWh (Idaho Price Summary) |
Idaho Utility Context for EV Charging Costs
Idaho home-charging costs are lowest when owners align EV charging windows to utility time-of-use schedules. As of early 2026, confirm active tariff sheets with your utility and the Idaho PUC before final budget assumptions.
- Idaho Power (residential standard): service charge is $15/month and tiered energy pricing is published at 12.1195 cents/kWh (0-800 kWh), 13.2995 (801-2,000), and 14.6185 (over 2,000) in summer, with lower non-summer tiers at 9.9332, 10.4305, and 11.0052 cents/kWh.
- Idaho Power (residential Time of Use): summer pricing is 29.9185 cents/kWh on-peak (7 p.m.-11 p.m.), 14.9594 mid-peak (3 p.m.-7 p.m.), and 7.4797 off-peak (11 p.m.-3 p.m.); non-summer pricing is 13.8347 on-peak and 9.2231 off-peak. Idaho Power also states a Time-of-Use Trial beginning Jan. 1, 2026 with first-year extra-cost exposure capped at $10 versus Standard energy charges.
- Rocky Mountain Power (Idaho Schedule 36 Time of Day): on-peak is 18.5344 cents/kWh in summer and 15.8791 in winter, with off-peak at 5.9010 and 5.4253 cents/kWh; customer service charge is $23.50/month. Peak windows are June-October 3 p.m.-11 p.m. and November-May 6-9 a.m. plus 6-11 p.m.
- IPUC regulates investor-owned electric utilities (including Idaho Power, PacifiCorp dba Rocky Mountain Power, and Avista), while cooperatives and city utilities are outside IPUC rate jurisdiction; use Idaho PUC maps and OEMR utility lists to identify the correct provider before comparing EV charging costs.
EIA: Idaho Electricity ProfileEIA: U.S. Electricity ProfileIdaho PUC: About the Commission (jurisdiction)Idaho PUC: Utility MapsIdaho PUC: Approved Electric TariffsIdaho OEMR: Utility Contact InformationIdaho Power: Company Information (service area)Idaho Power: Idaho Home PricingIdaho Power: Time of Use PlanRocky Mountain Power: Time of Day PlansRocky Mountain Power: Idaho Rates and TariffsIdaho OEMR: NEVI ProgramAFDC: Idaho Laws and IncentivesAFDC: Idaho EV FeeAFDC: Idaho Transportation Data
Rates updated monthly | Source: EIA and utility filings.
Idaho EV Registration Fee
Idaho Local EV Charging Insights
These Idaho-specific factors usually explain real monthly cost differences between two drivers with similar mileage.
- I-84 is a designated Idaho Alternative Fuel Corridor in the state NEVI program. OEMR states NEVI-funded DC fast sites must be within one mile of designated corridors and spaced at 50-mile intervals, which directly affects long-trip charging reliability on Boise-Caldwell-Twin Falls-Pocatello travel patterns.
- AFDC's Idaho Transportation Data page currently lists 8,500 registered EVs and 4,600 registered PHEVs, plus 630 public electric charging ports in-state; corridor and metro charging demand is growing, but coverage is still denser in Treasure Valley routes than many rural segments.
- AFDC's Idaho state summary lists Idaho's EV fee law ($140/year for EVs and $75/year for PHEVs) and shows Idaho's incentives list dominated by infrastructure and utility items rather than statewide purchase rebates. As of early 2026, verify active incentive eligibility before purchase timing decisions.
- EIA's Idaho profile identifies hydroelectric as Idaho's primary electricity source, which helps keep many Idaho home-charging scenarios cost-competitive versus public fast charging on the same monthly mileage.
EV Charging Costs by City in Idaho
View more Idaho cities ->| City | Avg Rate | Monthly Cost Estimate | Action |
|---|---|---|---|
| Boise City | $0.12/kWh | $31.58/month | View city page -> |
| Nampa | $0.12/kWh | $31.58/month | View city page -> |
| Meridian | $0.12/kWh | $31.58/month | View city page -> |
How Idaho Compares to Nearby States
| State | Rate | Rank |
|---|---|---|
| Idaho (Current) | $0.12/kWh | #3 |
| Washington | $0.13/kWh | #16 |
| Oregon | $0.15/kWh | #25 |
| Nevada | $0.13/kWh | #11 |
| Utah | $0.13/kWh | #15 |
| Wyoming | $0.13/kWh | #17 |
Calculate Your Idaho EV Charging Costs
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Frequently Asked Questions
How much does it cost to charge an EV in Idaho?
Home charging in Idaho averages around $0.12/kWh. Public Level 2 sessions are estimated around $0.24-$0.37/kWh, while DC fast charging is estimated around $0.40-$0.54/kWh depending on network and membership. Final cost can also include session or idle fees.
What is the cheapest time to charge an EV in Idaho?
It depends on your utility. Idaho Power's lowest TOU period is 11 p.m.-3 p.m. in summer and broad off-peak blocks outside morning/evening peaks in non-summer, while Rocky Mountain Power's Idaho Schedule 36 off-peak hours are outside 3 p.m.-11 p.m. (summer) and outside 6-9 a.m. plus 6-11 p.m. (winter). If your account is on a TOU tariff, charging outside those peak windows is the strongest bill-control step.
How much does it cost to fully charge a Tesla Model Y in Idaho?
Charging a Tesla Model Y from near-empty in Idaho costs approximately $9.11 at home, $22.01 at a public Level 2 station, and $34.16 at a DC fast charger, based on EPA efficiency of 25.3 kWh/100 miles and an estimated 300-mile range.
Does Idaho offer state EV rebates in 2026?
AFDC's Idaho laws and incentives summary does not list a statewide light-duty EV purchase rebate entry; it does list Idaho's NEVI planning and the EV fee law. Idaho also applies annual registration surcharges of $140 for EVs and $75 for PHEVs under AFDC's Idaho EV fee entry.
How does I-84 affect Idaho EV road trip planning?
I-84 is one of Idaho's designated NEVI Alternative Fuel Corridors. OEMR's NEVI rules note corridor sites must be within one mile of the route and generally every 50 miles, so I-84 deployment progress is a direct indicator of fast-charge stop spacing for most southwest-to-southeast Idaho road trips.
Which utilities should Idaho EV drivers compare before installing a home charger?
Start with your actual service territory utility: Idaho Power, Rocky Mountain Power, Avista, or your local co-op/municipal utility. Idaho PUC and OEMR utility resources show that tariff structures vary across these territories, so charger ROI should be modeled with your own utility's current rate sheet, not a statewide average only.
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Internal Resources
Data updated monthly where available.