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Your electricity in zip code 78228 is delivered by CPS Energy. This area is served by a regulated utility.
Residents of zip code 78228 in San Antonio, Texas receive electricity service through CPS Energy, the city-owned municipal utility serving Bexar County's 1.4 million residents. Unlike much of Texas, San Antonio operates under a regulated utility model — meaning 78228 households cannot choose an alternative retail electricity provider. CPS Energy controls both the generation and delivery of power in this territory. As of March 2026, the average residential rate in this area is approximately 12.1¢/kWh. While competition between providers isn't available here, understanding your rate structure, billing options, and energy efficiency programs offered by CPS Energy can still make a meaningful difference in your monthly electricity costs.
The current average residential electricity rate in San Antonio's 78228 zip code is 12.1¢/kWh, as set by CPS Energy. This rate is established through a regulated ratemaking process overseen by the City of San Antonio rather than the competitive market forces that govern deregulated Texas territories. Compared to the statewide average in deregulated areas — which can fluctuate between 11¢ and 16¢/kWh depending on market conditions — CPS Energy's rate sits in a moderate range. However, because there is no competitive market here, residents cannot shop for a better per-kWh price from a third-party provider.
Rate changes in 78228 are tied to CPS Energy's periodic rate review proceedings, fuel cost adjustments, and infrastructure investment needs. Spring months like March typically bring moderate demand, which can influence how CPS Energy structures its seasonal rate components.
Unlike deregulated Texas zip codes where shoppers can choose between 3-month, 12-month, or 24-month fixed-rate contracts, residents of 78228 are on CPS Energy's standard tariff rate. There are no contract term options to compare. However, CPS Energy does offer budget billing, which averages your annual usage into equal monthly payments — a useful tool for households on fixed incomes or those wanting to avoid seasonal bill spikes during San Antonio's hot summers.
Zip code 78228 is not part of Texas's deregulated electricity market. There are no competing retail electric providers (REPs) serving this address. Providers like Reliant, TXU Energy, Green Mountain Energy, or Gexa Energy — common in deregulated areas like Houston or Dallas — do not operate in CPS Energy's territory. This is an important distinction for residents who may have previously lived in other parts of Texas where provider choice was available.
CPS Energy is one of the largest municipally owned electric and gas utilities in the United States, serving approximately 930,000 electric customers across the greater San Antonio area, including all of Bexar County. As a municipal utility, CPS Energy is accountable to the City of San Antonio rather than the Public Utility Commission of Texas (PUCT), which regulates investor-owned utilities and the deregulated market. Residents in 78228 cannot switch providers, but they can enroll in CPS Energy programs such as SolarHostHome, Energy Efficiency rebates, and WeCare assistance programs for income-qualified households.
Neighboring zip codes including 78201, 78202, 78204, 78205, and 78207 are all served by CPS Energy under the same regulated rate structure — so residents across central San Antonio pay essentially the same base rate of 12.1¢/kWh. There is no rate advantage to living in one zip code versus another within the CPS territory. However, household bills can vary significantly based on home size, insulation quality, and HVAC efficiency — factors especially relevant in Bexar County where summer temperatures routinely exceed 100°F, driving up cooling costs from June through September.
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.
San Antonio's 78228 is served by CPS Energy, a municipally owned utility that operates outside Texas's deregulated electricity market. Because CPS Energy controls both generation and delivery, state law does not require it to open its territory to retail competition.
As of March 2026, the average residential electricity rate in 78228 is approximately 12.1¢/kWh, set by CPS Energy through its regulated tariff structure. This rate applies uniformly across CPS Energy's service territory in Bexar County.
CPS Energy's 12.1¢/kWh rate is competitive with many deregulated Texas markets, but residents lack the ability to shop for better deals. Deregulated areas like Houston or Dallas offer provider choice, meaning rates can go higher or lower depending on market conditions.
CPS Energy offers the WeCare program for income-qualified customers, providing bill assistance and energy efficiency upgrades. Eligible households in 78228 may receive free weatherization services, reduced rates, and help navigating additional federal energy assistance programs like LIHEAP.
Yes. While you cannot shop for a lower rate, you can lower your bill through CPS Energy's energy efficiency rebates, smart thermostat programs, budget billing enrollment, and by reducing usage during peak demand hours — especially during San Antonio's hot summer months.
Yes. All zip codes within CPS Energy's service territory — including 78201, 78202, 78204, 78205, 78207, and 78228 — pay the same regulated base rate. Individual bills differ based on household usage, home size, and energy efficiency, not zip code location.