Avista Corp Electricity Rates and Average Bill (Washington)
Data through April 2026 (the latest month EIA has published) · Updated July 05, 2026
As of April 2026, Avista Corp's residential customers in Washington paid an average effective rate of 14.7¢/kWh with an average monthly bill of $110.99, per EIA Form 861-M data. That rate is 0.3¢ above the Washington average of 14.36¢/kWh; the U.S. average is 18.83¢/kWh.
Rate trend vs the Washington average
View this chart as a table (last 12 months)
| Month | Rate (¢/kWh) | Avg bill ($/mo) | Avg usage (kWh/mo) |
|---|---|---|---|
| May 2025 | 14.02 | 96.58 | 689 |
| June 2025 | 13.95 | 106.2 | 761 |
| July 2025 | 13.78 | 130.72 | 949 |
| August 2025 | 14.24 | 134.01 | 941 |
| September 2025 | 14.32 | 116.08 | 811 |
| October 2025 | 14.28 | 100.99 | 707 |
| November 2025 | 14.42 | 129.72 | 899 |
| December 2025 | 14.72 | 160.23 | 1088 |
| January 2026 | 14.76 | 174.53 | 1182 |
| February 2026 | 14.76 | 144.99 | 983 |
| March 2026 | 15.11 | 129.41 | 857 |
| April 2026 | 14.7 | 110.99 | 755 |
Avista Corp vs Washington vs the U.S.
| Avista Corp | Washington | U.S. average | |
|---|---|---|---|
| Rate (April 2026) | 14.7¢/kWh | 14.36¢/kWh | 18.83¢/kWh |
| Average monthly bill | $110.99 | $130.76 | $127.71 |
| Average monthly usage | 755 kWh | 910 kWh | 678 kWh |
| Rate change, 1 year | +4.4% | +10.3% | +7.3% |
Estimate a bill at Avista Corp rates
Worked example: 1,000 kWh at Avista Corp's average effective rate of 14.7¢/kWh is about $147.00. The utility's actual average usage is 755 kWh/month, which produces the $110.99 average bill. This is an all-in average (energy, delivery, fixed charges, riders); your tariff's marginal price will differ.
See the full Washington rate trend, look up another utility by ZIP code, or read why electric bills are rising.
Source: EIA Form 861-M (monthly utility-level sales to ultimate customers, residential), published with roughly a two-month lag. Rate = revenue ÷ sales; bill = revenue ÷ customers. Months failing basic sanity screens are excluded. See methodology.