Electricity rates — Southwestern Public Service Co
A household served by Southwestern Public Service Co using 1,000 kWh a month pays about $1,379.60 a year on the cheapest of 1 generally available plan — R (Residential Service) - Rate 1 from Southwestern Public Service Co, in effect since January 2026. Rates checked September 23, 2026. A further 2 schedules are published but restricted — means-tested, closed to new customers, or needing particular equipment — and they are priced further down.
Every priced plan, 1,000 kWh/mo
| Plan | Per year | vs cheapest | Effective |
|---|---|---|---|
| Residential Heating Service - Rate 39priced by season · in effect since January 2026 · needs electric heating | $1,197.76 | −$181.84 | 10.0¢ |
| R (Residential Service) - Rate 1✓ cheapestpriced by season · in effect since January 2026 | $1,379.60 | — | 11.5¢ |
| Residential Heating Service TOU - Rate 39time-of-use · in effect since January 2026 · needs electric heating | $1,500.88 | +$121.28 | 12.5¢ |
Cost across usage levels
The cheapest plan at each consumption level, showing whether the ranking holds as usage changes.
- 500 kWh/mo — cheapest $757.00 (R (Residential Service) - Rate 1), dearest $757.00
- 1,000 kWh/mo — cheapest $1,379.60 (R (Residential Service) - Rate 1), dearest $1,379.60
- 2,000 kWh/mo — cheapest $2,624.76 (R (Residential Service) - Rate 1), dearest $2,624.76
What a typical bill costs
At 1,000 kWh a month one plan here is open to any household — R (Residential Service) - Rate 1, at $1,379.60 a year. There is no cheaper option to move to, only the restricted schedules priced below.
Effective rates, bill divided by kilowatt-hours, come to 11.5¢ per kWh at that usage.
How it compares
Among the 109 utilities indexed, Southwestern Public Service Co's cheapest open plan is the 26th-lowest, 16% less than their median of $1,649.16. It sits between Horry Electric Coop Inc ($1,372.20) and Jackson Electric Member Corp ($1,381.37).
Its fixed charge, $11.20 a month on R (Residential Service) - Rate 1, is lower than on the cheapest plan of 82 of the other 108 utilities.
None of Southwestern Public Service Co's plans open to any household has a tiered step or a seasonal price in this data: a kWh costs the same however much is used and whatever the month.
In the guides: What a bill costs before a single kilowatt-hour
How the answer changes with usage
R (Residential Service) - Rate 1 is cheapest at every level tested — $757.00 a year at 500 kWh a month, $2,624.76 at 2,000 kWh.
Cheapest 3 plans at 1,000 kWh a month
Residential Heating Service - Rate 39 — $1,197.76 a year, 10.0¢ per kWh effective, priced by season. It carries a $11.20 monthly standing charge. In effect since January 2026. Restricted: needs electric heating.
R (Residential Service) - Rate 1 — $1,379.60 a year, 11.5¢ per kWh effective, priced by season. It carries a $11.20 monthly standing charge. In effect since January 2026.
Residential Heating Service TOU - Rate 39 — $1,500.88 a year, 12.5¢ per kWh effective, time-of-use. It carries a $11.20 monthly standing charge. In effect since January 2026. Restricted: needs electric heating.
How these plans are structured
Of 3 priceable plans: 1 time-of-use, 2 priced by season.
Every plan carries a $11.20 fixed monthly charge.
Who provides these plans
3 of Southwestern Public Service Co's 3 published residential schedules can be priced. EIA-861 lists it serving homes in more than one state and its URDB record does not say which these schedules are for, so it appears on no state page.
What this does not cover
One of these plans prices by the hour, so its figure is marked lower confidence.
New to these terms? The methodology page explains tiered bands, time-of-use periods and fixed charges, and sets out exactly what the rate engine assumes.
Estimate — your actual bill may differ.
Tariff structures from NREL/OpenEI Utility Rate Database (CC0 1.0), retrieved September 23, 2026.