San Antonio Electricity Rates 2026

San Antonio has a unique electricity landscape in Texas. The vast majority of the city is served by CPS Energy, the nation's largest municipally owned electric and natural gas utility, providing power to approximately 900,000 electric customers. Because CPS Energy is a municipal utility, most San Antonio addresses are NOT part of the deregulated ERCOT retail market — residents in those areas cannot choose a competing REP and instead pay CPS Energy's regulated rates directly.

However, certain ZIP codes on the outer fringes of the San Antonio metro — particularly in fast-growing suburban areas of Bexar County and adjacent counties — fall within Oncor or AEP Texas Central territory and are fully deregulated. Residents in those areas can shop among competing REPs just like Dallas or Houston customers. Checking your specific ZIP code at the PUC of Texas's Power to Choose website is the only reliable way to confirm your options.

For deregulated San Antonio-area ZIP codes, available providers include TXU Energy, Gexa Energy, Champion Energy, Pulse Power, 4Change Energy, Discount Power, and Frontier Utilities.

FAQ — How do I know if I can switch providers in San Antonio? Enter your ZIP code on PowerToChoose.org. If plans appear, your address is deregulated. If no plans appear, you are a CPS Energy customer and must work directly with CPS for rate programs.

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