Southwestern Public Service Co. electricity rates
Investor-owned utility · Texas · SPP region · SPP
Southwestern Public Service Co. is a for-profit, investor-owned utility regulated by the state utility commission, serving 223,685 homes in Texas. Its residential customers pay an average of 14.06¢/kWh including fixed and delivery charges, 22% less than the U.S. average.
Rate basis: EIA-861M monthly utility data, 12 months ending 2026-07.
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Southwestern Public Service Co. bill estimates
| Monthly use | At average all-in rate |
|---|---|
| 500 kWh | $70.30 |
| 1,000 kWh | $140.60 |
| 1,500 kWh | $210.90 |
| 2,000 kWh | $281.20 |
Southwestern Public Service Co. residential rate plans
| Plan | Effective | Customer charge | Energy charges |
|---|---|---|---|
| Residential Heating Service - Rate 39time-of-use | 2026-01-01 | $11.20 | 11.6¢ (12am–12am) — summer weekdays |
| R (Residential Service) - Rate 1time-of-use | 2026-01-01 | $11.20 | 11.6¢ (12am–12am) — summer weekdays |
| Residential Heating Service TOU - Rate 39time-of-use | 2026-01-01 | $11.20 | 8.3¢ (12am–12pm, 6pm–12am) · 28.5¢ (12pm–6pm) — summer weekdays |
| Residential Service with Electric Space Heatingtime-of-use | 2019-01-01 | $10.00 | 10.5¢ (12am–12am) — summer weekdays |
Source: OpenEI U.S. Utility Rate Database. Rates change. Check the linked tariff or your bill for current figures.
Southwestern Public Service Co. rate history
2015–2025: +35% change in the average residential rate (10.33¢ → 13.94¢). Annual EIA-861 data.
Outages & reliability
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Reliability history
| 2025 | Southwestern Public Service Co. | Texas avg | U.S. avg |
|---|---|---|---|
| Outage minutes per customer (SAIDI) | 441 | 224 | 266 |
| Outages per customer (SAIFI) | 1.71 | 1.65 | 1.34 |
| Average restoration time (CAIDI) | 4 hr 18 min | — | — |
| Outage minutes excluding major storms | 151 | 127 | 121 |
Outages in counties served (2025)
From ORNL EAGLE-I, which tracks customers without power every 15 minutes. These counts cover every utility in each county. Weighted across Southwestern Public Service Co.'s counties, customers averaged 4 hr 26 min without power.
| County | Outage min/customer | Days with outages | Peak customers out | Worst day |
|---|---|---|---|---|
| Armstrong | 2,675 | 12 | 1,126 | 2025-07-18 |
| Roberts | 2,361 | 9 | 617 | 2025-09-10 |
| Briscoe | 2,338 | 17 | 893 | 2025-03-14 |
| Hutchinson | 1,676 | 70 | 6,183 | 2025-03-19 |
| Crosby | 1,468 | 34 | 2,668 | 2025-06-07 |
| Wheeler | 1,401 | 24 | 1,927 | 2025-03-14 |
| Foard | 1,274 | 11 | 253 | 2025-08-12 |
| Oldham | 1,050 | 19 | 584 | 2025-03-14 |
| Borden | 1,045 | 16 | 311 | 2025-05-10 |
| Deaf Smith | 934 | 113 | 8,647 | 2025-03-14 |
| Carson | 929 | 42 | 2,319 | 2025-07-12 |
| Moore | 907 | 37 | 4,941 | 2025-08-03 |
| Lynn | 892 | 34 | 3,680 | 2025-05-21 |
| Parmer | 835 | 88 | 6,045 | 2025-03-14 |
| Sherman | 830 | 7 | 1,251 | 2025-08-09 |
| Randall | 813 | 44 | 20,522 | 2025-03-14 |
| Garza | 777 | 35 | 2,082 | 2025-02-06 |
| Gray | 771 | 35 | 5,067 | 2025-03-19 |
| Cottle | 733 | 13 | 279 | 2025-04-20 |
| Donley | 707 | 12 | 1,871 | 2025-03-14 |
| Cochran | 678 | 14 | 348 | 2025-03-14 |
| Dallam | 673 | 16 | 924 | 2025-09-18 |
| Hartley | 643 | 16 | 616 | 2025-09-18 |
| Potter | 638 | 58 | 19,503 | 2025-03-14 |
| Castro | 624 | 82 | 1,277 | 2025-03-14 |
Southwestern Public Service Co. service area
Southwestern Public Service Co. serves 45 counties in Texas and 182 ZIP codes.
Andrews, Armstrong, Bailey, Borden, Briscoe, Carson, Castro, Cochran, Cottle, Crosby, Dallam, Dawson, Deaf Smith, Donley, Ector, Floyd, Foard, Gaines, Garza, Gray, Hale, Hansford, Hartley, Hemphill, Hockley, Hutchinson, Lamb, Lipscomb, Lubbock, Lynn, Midland, Moore, Motley, Ochiltree, Oldham, Parmer, Potter, Randall, Roberts, Sherman, Swisher, Terry, Wheeler, Wilbarger, Yoakum
Cities: Lubbock, Amarillo, Midland, Odessa, West Odessa, Plainview, Pampa, Hereford, Dumas, Canyon, Levelland, Andrews, Borger, Vernon, Brownfield, Lamesa, Perryton, Dalhart, Seminole, Kermit, Littlefield, Slaton, Post, Muleshoe, Denver City, Tulia, Wolfforth, Dimmitt, Friona, Spearman, Cactus, Canadian, Floydada, Seagraves, Abernathy, Tahoka, Shallowater, Panhandle, Idalou, Olton
Programs, smart meters & solar
| Smart meters (AMI) for homes | 99% |
| Time-based rate programs | Time-of-use rates |
| Homes on time-based rates | 53 |
| Net-metered solar homes | 0 reported |
| Homes in demand response (e.g. thermostat rebates) | 6,859 |
| Residential efficiency incentives paid (2025) | $2,429,299 |
| Residential energy saved by programs | 7,375 MWh |
Southwestern Public Service Co. at a glance
| Ownership | Investor-owned utility |
| Services | Generation, Transmission, Distribution, Wholesale Marketing |
| Commercial rate | 9.97¢/kWh |
| Industrial rate | 5.20¢/kWh |
| Retail revenue (2025) | $1,061,251,800 |
| Electricity sold (2025) | 13,597,906 MWh |
| Peak demand | 4,586 MW summer · 3,868 MW winter |
| Power from own generation | 54% (rest purchased) |
| Line losses | 3.5% |
| Balancing authority | SWPP |
| EIA utility ID | 17718 |
| Website | www.xcelenergy.com/company/rates_and_regulations/filings/texas_demand-side_management |
Other utilities in Texas
Frequently asked questions
What is Southwestern Public Service Co.'s electricity rate?
Southwestern Public Service Co. residential customers pay an average of 14.06¢ per kWh, all charges included (EIA-861M monthly utility data, 12 months ending 2026-07). That's 12% below the Texas average of 15.96¢ and 22% below the U.S. average.
What is the average Southwestern Public Service Co. electric bill?
About $132 a month. The average Southwestern Public Service Co. home uses 937 kWh a month. At 1,000 kWh the bill would be about $141.
How many customers does Southwestern Public Service Co. have?
Southwestern Public Service Co. serves 223,685 residential customers and 282,824 customers in total in Texas, across 45 counties.
How reliable is Southwestern Public Service Co.?
In 2025, the average Southwestern Public Service Co. customer was without power for 7 hr 21 min (SAIDI) over 1.71 interruptions (SAIFI), including major storms. Excluding major event days it was 2 hr 31 min. The Texas average was 3 hr 44 min and the U.S. average 4 hr 26 min.
Does Southwestern Public Service Co. offer time-of-use rates?
Yes. The OpenEI rate database lists 4 time-of-use residential plans, including Residential Heating Service - Rate 39. Running big appliances off-peak can cut their cost. Pick the plan in the calculator above to see by how much.
Sources: EIA-861 2025 and EIA-861M (through July 2026), OpenEI URDB, ORNL EAGLE-I, U.S. Census. Methodology. Spot an error? Rates change often, so confirm with Southwestern Public Service Co. before making decisions.