15.37¢
per kWh, 2025
[ Southwestern Electric Coop / IL ]
Southwestern Electric Coop electricity rates in Illinois
NO RATE CASE ON FILE · DATA 2025
change in average rate, 2024→2025
+12.3%
vs 2024
24,414
residential customers
+16.0%
since 2020
What your bill becomes
Bill today
No change on file
Difference / month · / year
Estimated at Southwestern Electric Coop's average effective residential rate (15.37¢/kWh, EIA, all charges included). Your tariff, fees and taxes differ.
Rate history 2015–2025
| Year | ¢/kWh | Change | Customers |
|---|---|---|---|
| 2015 | 13.26¢ | — | 22,093 |
| 2016 | 13.25¢ | −0.1% | 22,244 |
| 2017 | 13.35¢ | +0.8% | 22,432 |
| 2018 | 13.04¢ | −2.3% | 22,620 |
| 2019 | 13.14¢ | +0.8% | 22,802 |
| 2020 | 13.25¢ | +0.8% | 23,017 |
| 2021 | 13.10¢ | −1.1% | 23,242 |
| 2022 | 12.98¢ | −0.9% | 23,557 |
| 2023 | 13.20¢ | +1.7% | 24,676 |
| 2024 | 13.68¢ | +3.6% | 24,822 |
| 2025 | 15.37¢ | +12.3% | 24,414 |
How this compares
17.67¢
Illinois average, 2025
−13.0%
Southwestern Electric Coop vs IL 2025 average
−10.8%
vs US 2025 average
#13
priciest in IL
Serves 11 counties in Illinois: Bond, Clay, Clinton, Effingham, Fayette, Macoupin, Madison, Marion, Montgomery, Shelby, St Clair. 51 ZIP codes.
Questions
Is Southwestern Electric Coop raising rates in 2026?
No rate case for Southwestern Electric Coop is on file with the Illinois Commerce Commission in our tracker. Its average residential rate moved +12.3% from 2024 to 2025. We check the commission docket monthly.
What does Southwestern Electric Coop charge per kWh?
Southwestern Electric Coop's average effective residential rate was 15.37¢ per kWh in 2025 (EIA-861, revenue divided by sales, all charges included). Illinois's 2025 average was 17.67¢.
How much have Southwestern Electric Coop rates gone up in five years?
+16.0% between 2020 and 2025, against +51.6% for Illinois as a whole over the latest five-year window.
How many customers does Southwestern Electric Coop have in Illinois?
24,414 residential customers in 2025, across 11 counties including Bond, Clay, Clinton, according to the EIA-861 survey.
Where do these numbers come from?
Rates and customer counts are from the US Energy Information Administration's annual EIA-861 survey; rate-case facts are from the Illinois Commerce Commission docket linked on this page. Nothing here is a utility bill; use it to understand the direction and size of changes.
Sources
- EIA-861 Sales to Ultimate Customers, 2015–2025 (released 2026-10-07)
- EIA-861M monthly state averages through Jul 2026
- NREL utility-by-ZIP lookup (2024)