Southwestern Public Service Co Electricity Rates and Average Bill (Texas)
Data through August 2026 (the latest month EIA has published) · Updated October 31, 2026
As of August 2026, Southwestern Public Service Co's residential customers in Texas paid an average effective rate of 14.95¢/kWh with an average monthly bill of $228.11, per EIA Form 861-M data. That rate is 1.0¢ below the Texas average of 15.91¢/kWh; the U.S. average is 18.16¢/kWh.
Rate trend vs the Texas average
View this chart as a table (last 12 months)
| Month | Rate (¢/kWh) | Avg bill ($/mo) | Avg usage (kWh/mo) |
|---|---|---|---|
| September 2025 | 16.21 | 142.59 | 880 |
| October 2025 | 13.32 | 105.84 | 795 |
| November 2025 | 13.53 | 92.61 | 685 |
| December 2025 | 12.89 | 122.62 | 951 |
| January 2026 | 12.63 | 134.40 | 1064 |
| February 2026 | 12.67 | 102.89 | 812 |
| March 2026 | 13.81 | 93.93 | 680 |
| April 2026 | 13.64 | 86.58 | 635 |
| May 2026 | 12.56 | 109.65 | 873 |
| June 2026 | 15.25 | 174.54 | 1145 |
| July 2026 | 14.93 | 213.56 | 1430 |
| August 2026 | 14.95 | 228.11 | 1526 |
Southwestern Public Service Co vs Texas vs the U.S.
| Southwestern Public Service Co | Texas | U.S. average | |
|---|---|---|---|
| Rate (August 2026) | 14.95¢/kWh | 15.91¢/kWh | 18.16¢/kWh |
| Average monthly bill | $228.11 | $265.58 | $209.23 |
| Average monthly usage | 1526 kWh | 1670 kWh | 1152 kWh |
| Rate change, 1 year | −4.7% | +3.3% | +3.4% |
Estimate a bill at Southwestern Public Service Co rates
Worked example: 1,000 kWh at Southwestern Public Service Co's average effective rate of 14.95¢/kWh is about $149.50. The utility's actual average usage is 1526 kWh/month, which produces the $228.11 average bill. This is an all-in average (energy, delivery, fixed charges, riders); your tariff's marginal price will differ.
See the full Texas rate trend, look up another utility by ZIP code, or read why electric bills are rising.
Source: EIA Form 861-M (monthly utility-level sales to ultimate customers, residential), published with roughly a two-month lag. Rate = revenue ÷ sales; bill = revenue ÷ customers. Months failing basic sanity screens are excluded. See methodology.