San Marcos electricity and gas rates
Who supplies power and gas to San Marcos houses and what a typical house uses: about 983 kWh of electricity a month.
Electricity: SMTX Utilities (City of San Marcos)
Residential rate from October 1, 2026: $12.94 minimum charge and $0.03934 per kWh, plus the Power Cost Recovery Factor (PCRF), which recovers the city's cost of buying electricity from LCRA and is reviewed monthly. A 6% franchise fee applies to the minimum, kWh and PCRF charges.
| Charge | Price |
|---|---|
| Fixed charge | $14.19 a month |
| Per kWh | 11.79¢ |
Gas: CenterPoint Energy
Residential rate R-2099-U, South Texas rate area (which lists San Marcos): $30.33 customer charge and $0.47070 per Ccf at the 14.65 pressure base, plus the Purchased Gas Adjustment; the October 2026 South Texas total filed with the RRC is $0.84846 per Ccf. A Tax Adjustment, under the Tax Adjustment and Franchise Fee Adjustment rate schedules, also applies.
| Charge | Price |
|---|---|
| Fixed charge | $30.33 a month |
| Per therm | $1.2721 |
Ways to pay less
- Energy Efficient Home rebate. For existing single-family residential SMTX Utility customers with an account in good standing: rebates for efficient HVAC systems, attic and wall insulation, duct sealing, ENERGY STAR windows and doors, and solar window film and screens. How: Download the flyer and application from the city's Energy Rebate Programs page.
Sources
- City of San Marcos Water & Energy Conservation
- City of San Marcos Energy Rebate Programs
- CenterPoint Energy residential rate R-2099-U GRIP 2026
- CenterPoint Energy Texas Purchased Gas Adjustments
Checked October 20, 2026. Every number here comes from the public sources listed, matched by our checker.
Rates change every year; this page shows when it was last checked. Nothing here is legal, tax or insurance advice.