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Your electricity in zip code 78218 is delivered by CPS Energy. This area is served by a regulated utility.
Residents in the 78218 zip code of San Antonio, Texas are served exclusively by CPS Energy, the city-owned municipal utility operating throughout Bexar County. Unlike the deregulated areas of Texas where consumers can shop among dozens of competing retail electricity providers, 78218 is part of a regulated municipal market — meaning CPS Energy is the sole electricity provider for this area. With San Antonio's population exceeding 1.4 million and a median household income of $55,084, understanding how your electricity rate is set — and how to make the most of it — is essential for managing monthly energy costs. As of March 2026, the average electricity rate in 78218 is approximately 12.1¢ per kilowatt-hour.
In March 2026, the average electricity rate for CPS Energy customers in the 78218 zip code stands at 12.1¢/kWh. Because CPS Energy operates as a regulated municipal utility, this rate is set by the utility and approved through a public governance process — not determined by market competition. There is no rate range to shop across providers, and no "best deal" to hunt for among retailers. Your rate is uniform across the service territory, which covers most of San Antonio and surrounding Bexar County. Rates can shift over time as CPS Energy files for rate adjustments with its board of trustees, so staying informed about upcoming rate changes is worthwhile.
Because 78218 is in a regulated, non-deregulated market, traditional concepts like short-term, medium-term, or long-term electricity contracts do not apply here. CPS Energy customers are on standard tariff-based pricing rather than competitive retail contracts. There are no fixed-rate or variable-rate plan comparisons to make. Instead, CPS Energy offers programs such as budget billing (levelized payment plans) and time-of-use options that can help households manage costs more predictably throughout the year.
Unlike deregulated Texas zip codes — such as those served by Oncor in the Dallas-Fort Worth area or AEP Texas in West Texas — 78218 has no retail electricity competition. Providers like Reliant, TXU Energy, Gexa Energy, Green Mountain Energy, and Constellation do not operate in this market. CPS Energy is the sole provider, and enrollment in service is automatic based on your service address. This is a key distinction from neighboring deregulated Texas markets.
CPS Energy (City Public Service) is a municipally owned utility, meaning it is owned and operated by the City of San Antonio. It handles electricity generation, transmission, and delivery for the 78218 area. Because there is no separation between the retail and delivery functions — as there is in deregulated markets — there are no separate TDSP delivery charges to account for. Your CPS Energy bill reflects the full cost of electricity service in one consolidated statement.
Nearby San Antonio zip codes including 78201, 78202, 78204, 78205, and 78207 are all served by CPS Energy under the same regulated rate structure. Customers across these zip codes pay essentially the same base rate of approximately 12.1¢/kWh as of March 2026. Seasonal demand peaks in summer months — when San Antonio temperatures regularly exceed 100°F — can influence future rate adjustment requests by CPS Energy. Monitoring your usage during June through September is especially important for keeping bills manageable.
Enroll in CPS Energy's Residential Time-of-Use rate plan and shift high-energy tasks — laundry, dishwashing, EV charging — to after 8 PM or before 3 PM on weekdays to avoid peak-hour surcharges during San Antonio's intense summer afternoons.
Apply for CPS Energy's free home energy audit program, which dispatches a certified technician to identify air sealing and insulation gaps common in older San Antonio homes, particularly those built before 1990 in neighborhoods like Southtown or Lavaca.
Install a programmable or smart thermostat and set it to 78°F or higher when away from home — in San Antonio's 100°F+ summer heat, every degree of setback can reduce cooling costs by approximately 3–4% per month.
Check eligibility for the CPS Energy REAP (Residential Energy Assistance Program) if your household income falls within federal guidelines — qualifying customers can receive direct bill credits and free weatherization upgrades that meaningfully reduce year-round energy expenses.
No. The 78218 zip code is served exclusively by CPS Energy, a regulated municipal utility. Texas electricity deregulation does not apply here, so residents cannot shop among competing retail electricity providers.
As of March 2026, CPS Energy customers in the 78218 area pay an average rate of approximately 12.1¢ per kilowatt-hour. This rate is set by the utility and applies uniformly across its San Antonio service territory.
CPS Energy is a municipally owned utility, meaning it is owned by the City of San Antonio. Texas law exempted municipal utilities from deregulation, so CPS Energy customers do not have the ability to choose a retail electricity provider.
Focus on energy efficiency upgrades, programmable thermostats, and reducing usage during peak hours. CPS Energy also offers rebate programs, budget billing, and time-of-use awareness tools to help customers manage costs.
Unlike deregulated markets where TDSP delivery charges appear separately, CPS Energy handles both generation and delivery. Your bill reflects consolidated pricing without a separately itemized third-party delivery charge.
Zip codes 78201, 78202, 78204, 78205, and 78207 are all within the CPS Energy service area and operate under the same regulated rate structure as 78218, with an average rate of approximately 12.1¢/kWh as of March 2026.