What this estimate includes
The energy portion multiplies monthly kilowatt-hours by the price per kilowatt-hour. A separate fixed-charge input lets you include a basic monthly customer charge.
What it does not include automatically
Tiered rates, time-of-use periods, fuel adjustments, demand charges, minimum bills, taxes, credits, and solar export compensation require a utility-specific model. Use the final amount and kWh from a real bill to calculate an all-in historical price.
State averages are a comparison tool
EIA prices divide residential utility revenue by residential electricity sales. They describe an average outcome across the state, not the rate offered to every household. Monthly averages can also move with seasonality.
U.S. Energy Information Administration, Electricity Retail Sales, residential average price. Latest monthly data: 2026-05; comparison baseline: 2025 annual. Verified 2026-08-05. Monthly prices can vary seasonally and are not utility-specific rates.