Methodology and data sources

Last updated September 29, 2026.

State electricity rates

State averages are residential revenue divided by residential kWh sold, from U.S. Energy Information Administration data for mid-2026. They include generation, delivery, fees and taxes. Average bills are the typical monthly residential bill in each state. National rank orders all 50 states plus Washington, D.C., from cheapest to most expensive.

Bill analyzer

Your all-in rate is your total bill divided by kWh used. We compare it with your state average. In deregulated states, savings estimates assume the supply portion is roughly 55–60% of an all-in bill and that competitive fixed-rate plans typically undercut default supply prices by 10–20%. In regulated states we estimate savings from time-of-use rates, community solar and efficiency. All results are estimates, not offers.

Texas delivery charges and plan calculator

Texas delivery (TDU) charges come from the Public Utility Commission of Texas residential rate summary and are updated after the scheduled March 1 and September 1 changes. The plan calculator adds the energy charge, base fee and delivery charges, subtracts any bill credit you enter, and divides by usage, the same way an Electricity Facts Label calculates average prices.

ESI ID decoder

The decoder matches the first seven digits of an ESI ID to the published prefixes of Texas transmission and distribution utilities. It runs in your browser; we don't store what you enter.

Guides

Guides are based on official sources listed at the end of each article, including the EIA, the U.S. Department of Energy and PUCT rules. Worked examples show every assumption so you can repeat the math with your own numbers.