Southwestern Public Service Co Electricity Rates and Average Bill (New Mexico)
Data through May 2026 (the latest month EIA has published) · Updated August 14, 2026
As of May 2026, Southwestern Public Service Co's residential customers in New Mexico paid an average effective rate of 10.60¢/kWh with an average monthly bill of $86.70, per EIA Form 861-M data. That rate is 3.5¢ below the New Mexico average of 14.12¢/kWh; the U.S. average is 18.44¢/kWh.
Rate trend vs the New Mexico average
View this chart as a table (last 12 months)
| Month | Rate (¢/kWh) | Avg bill ($/mo) | Avg usage (kWh/mo) |
|---|---|---|---|
| June 2025 | 14.12 | 154.59 | 1095 |
| July 2025 | 13.44 | 160.37 | 1193 |
| August 2025 | 14.72 | 176.61 | 1200 |
| September 2025 | 15.97 | 140.77 | 882 |
| October 2025 | 12.41 | 105.43 | 850 |
| November 2025 | 11.66 | 85.02 | 729 |
| December 2025 | 10.94 | 112.94 | 1032 |
| January 2026 | 11.73 | 144.12 | 1228 |
| February 2026 | 12.44 | 112.13 | 901 |
| March 2026 | 12.99 | 87.65 | 675 |
| April 2026 | 13.79 | 87.57 | 635 |
| May 2026 | 10.60 | 86.70 | 818 |
Southwestern Public Service Co vs New Mexico vs the U.S.
| Southwestern Public Service Co | New Mexico | U.S. average | |
|---|---|---|---|
| Rate (May 2026) | 10.60¢/kWh | 14.12¢/kWh | 18.44¢/kWh |
| Average monthly bill | $86.70 | $82.27 | $135.70 |
| Average monthly usage | 818 kWh | 583 kWh | 736 kWh |
| Rate change, 1 year | −11.9% | −2.6% | +6.2% |
Estimate a bill at Southwestern Public Service Co rates
Worked example: 1,000 kWh at Southwestern Public Service Co's average effective rate of 10.60¢/kWh is about $106.00. The utility's actual average usage is 818 kWh/month, which produces the $86.70 average bill. This is an all-in average (energy, delivery, fixed charges, riders); your tariff's marginal price will differ.
See the full New Mexico 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.