Avista Utilities (Avista Corp)
- Last verified (tariff snapshot)
- Mar 4, 2026
- Page updated
- Mar 4, 2026
Avista Utilities, operating as Avista Corp, is an investor-owned electric utility serving customers in Idaho and Washington. Serves Post Falls ID and Spokane area. Idaho Schedule 1 residential: $20 basic, tiered energy (8.57¢/9.70¢ per tariff). Settlement Jun 2025: +6.7% eff. Sept 2025, +4.7% eff. Sept 2026. Post Falls 1% franchise. At 1,000 kWh: ~$119.
This page brings together tariff-based rate information from our research, federal EIA statistics on sales and generation when available, and the cities and states this provider serves.
Residential rates
Tariff snapshot (Post Falls, ID)
- Customer charge
- $20.00/mo
- Energy charge (example tier)
- 9.88¢/kWh
Seasonal/tiered rates and riders may apply. Example tier used in our estimates.
myavista.com· verified 2026-03-04Example bill at 1,000 kWh (derived from tariff snapshot): $118.80/mo
Based on snapshot; excludes local taxes/fees; riders may vary.
For city-specific estimates (including water, sewer, trash), see Post Falls's full breakdown
Our estimates use tariff and official rate data from utility and regulatory sources. See our methodology for how we calculate bill estimates.
States & cities served
Cities in our dataset where this provider offers electric service. Click through to see utility cost estimates for each city.
Idaho
- Post Falls(used for tariff snapshot)
Data sources
- Our research: Tariff documents, PSC/regulatory filings, and official utility rate schedules. Each city page cites sources and last-verified dates.
- EIA (2024): Form 861 (sales, revenue, customers) and Form 860 (generation capacity by fuel). Supplementary context; our tariff-based rates remain primary for bill estimates.
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Understanding electricity costs
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