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Avista Corp Electricity Rates and Average Bill (Washington)

Data through May 2026 (the latest month EIA has published) · Updated August 14, 2026

As of May 2026, Avista Corp's residential customers in Washington paid an average effective rate of 14.67¢/kWh with an average monthly bill of $96.76, per EIA Form 861-M data. That rate is 0.3¢ below the Washington average of 14.95¢/kWh; the U.S. average is 18.44¢/kWh.

Average rate
14.67¢/kWh
+4.6% year over year
Average bill
$96.76
+0.2% year over year
Average usage
660 kWh/mo
vs 756 WA average
Residential customers
248,701
Investor Owned

Rate trend vs the Washington average

View this chart as a table (last 12 months)
MonthRate (¢/kWh)Avg bill ($/mo)Avg usage (kWh/mo)
June 202513.95106.20761
July 202513.78130.72949
August 202514.24134.01941
September 202514.32116.08811
October 202514.28100.99707
November 202514.42129.72899
December 202514.72160.231088
January 202614.76174.531182
February 202614.76144.99983
March 202615.11129.41857
April 202614.70110.99755
May 202614.6796.76660

Avista Corp vs Washington vs the U.S.

Avista CorpWashingtonU.S. average
Rate (May 2026)14.67¢/kWh14.95¢/kWh18.44¢/kWh
Average monthly bill$96.76$112.99$135.70
Average monthly usage660 kWh756 kWh736 kWh
Rate change, 1 year+4.6%+9.5%+6.2%

Estimate a bill at Avista Corp rates

1,000 kWh × 14.67¢ ≈ $146.70

Worked example: 1,000 kWh at Avista Corp's average effective rate of 14.67¢/kWh is about $146.70. The utility's actual average usage is 660 kWh/month, which produces the $96.76 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.