Southwestern Public Service Co bill decoder
Southwestern Public Service sells under this tariff at 11.50¢ per kWh all-in, -3.97¢ against the Texas average of 15.47¢. The $11.20 fixed charge is 10% of the bill.
Southwestern Public Service at 1,000 kWh, line by line
Southwestern Public Service bills $11.20 a month, 10% of the $114.96 total at 1,000 kWh. Southwestern Public Service charges 11.625¢ in Jun to Sep and 9.752¢ in Oct to May, 19% apart. 1,000 kWh costs $108.72 in the cheapest month, $127.45 in the most expensive.
Southwestern Public Service: what the tariff charges
| Line | Charged | Amount |
|---|---|---|
| Customer charge | Fixed, once a month | $11.20 |
| Energy, Oct to May | Every kWh | 9.752¢ per kWh |
| Energy, Jun to Sep | Every kWh | 11.625¢ per kWh |
Southwestern Public Service at 500, 1,000 and 2,000 kWh
| kWh | Total | ¢/kWh | Fixed | Energy | TX avg |
|---|---|---|---|---|---|
| 500 | $63.08 | 12.62 | $11.20 | $51.88 | $77.35 |
| 957 (average home) | $110.50 | 11.55 | $11.20 | $99.30 | $148.05 |
| 1,000 | $114.96 | 11.50 | $11.20 | $103.76 | $154.70 |
| 2,000 | $218.73 | 10.94 | $11.20 | $207.53 | $309.40 |
Southwestern Public Service by month at 1,000 kWh
| Month | Total | ¢/kWh |
|---|---|---|
| January | $108.72 | 10.87 |
| February | $108.72 | 10.87 |
| March | $108.72 | 10.87 |
| April | $108.72 | 10.87 |
| May | $108.72 | 10.87 |
| June | $127.45 | 12.75 |
| July | $127.45 | 12.75 |
| August | $127.45 | 12.75 |
| September | $127.45 | 12.75 |
| October | $108.72 | 10.87 |
| November | $108.72 | 10.87 |
| December | $108.72 | 10.87 |
How the Southwestern Public Service total climbs
$37.14 at 250 kWh becomes $322.49 at 3,000 kWh, 8.7 times the bill for 12 times the power.
Southwestern Public Service total in dollars, by kWh
- 37250
- 63500
- 89750
- 1151,000
- 1671,500
- 2192,000
- 3223,000
Check your Southwestern Public Service bill
Southwestern Public Service: tariff against EIA
EIA-861 puts the 2024 home price at 13.35¢ for Southwestern Public Service, across 222,146 home accounts using 957 kWh a month. The tariff gives 11.55¢ ($110.54). The +1.81¢ gap, about $17.29 a month, is riders, other plans and rate changes.
Other Southwestern Public Service residential plans
2 more Southwestern Public Service plans fit the model; the decoder prices each.
| Plan | Since | Type | 1,000 kWh | Fixed |
|---|---|---|---|---|
| Residential Heating Service - Rate 39 | 2026-01-01 | seasonal | $99.81 | $11.20 |
| Residential Heating Service TOU - Rate 39 | 2026-01-01 | time of use | $125.44 | $11.20 |
Southwestern Public Service: sources and limits
- Tariff: R (Residential Service) - Rate 1, effective 2026-01-01, record 69b31d6ca9608156eb096f1e, updated 2026-03-12; decode_tariffs.csv.
- Tariff sheet cited by the record: https://www.xcelenergy.com/staticfiles/xe-responsive/Company/Rates%20&%20Regulations/Rate%.
- Data: OpenEI URDB, EIA-861, EIA state data.
Southwestern Public Service: taxes, riders and adjustments sit outside these rates.
Keep going
Questions
What does Southwestern Public Service charge before I use any power?
$11.20 a month, which is 18% of the $63.08 total at 500 kWh.
What would a 1,000 kWh month cost at Southwestern Public Service?
About $114.96 before extras, made of $103.76 for energy and $11.20 fixed, or 11.50¢ per kWh.
Why does my Southwestern Public Service bill not match the tariff?
Because EIA's 2024 average of 13.35¢ for Southwestern Public Service sits +1.81¢ from the 11.55¢ the tariff gives at 957 kWh. Riders, fees and other plans explain it.
Why does the Southwestern Public Service bill change by season?
1,000 kWh costs $108.72 in the cheapest month and $127.45 in the most expensive, $18.74 apart.
How old is the Southwestern Public Service tariff used here?
It took effect 2026-01-01, 3 months before the April 2026 snapshot. Check Southwestern Public Service for newer rates.
How much power does a typical Southwestern Public Service home use?
EIA-861 shows 957 kWh a month for 2024. The tariff prices that at $110.54.