Tip: Enter your monthly usage (kWh or therms), supply rate, and any fixed monthly fees to see estimated monthly and annual savings.
Texas Energy Explainers
Electricity choice and TDUs
Most Texans in ERCOT choose a Retail Electric Provider (REP) for supply. Delivery (TDU) charges are set by the utility (e.g., Oncor, CenterPoint) and apply regardless of REP.
Rate types: fixed, variable, indexed
Fixed-rate plans lock in cents/kWh for a term. Variable and indexed plans can change monthly and may be tied to wholesale prices—savings can vary.
Usage credits and bill tiers
Some plans include usage credits (e.g., credits after 1000 kWh) or tiered pricing. Enter any recurring credits/charges as negative/positive fixed fees to reflect them.
Other States
Browse more deregulated markets on the states index.