15.37¢
per kWh, 2025
[ Southwestern Electric Coop / IL ]
Southwestern Electric Coop electricity rates in Illinois
CO-OP BOARD SETS RATES · 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.
What the numbers show
Since 2015, Southwestern Electric Coop's average residential rate has gone from 13.26¢ to 15.37¢ per kWh: +15.9% over 10 years, or about +1.5% a year. It rose in 6 of the 10 years we can compare, and the biggest one-year increase was +12.3% in 2025. The largest drop was −2.3% in 2018.
For a home using 716 kWh a month, the Illinois average, Southwestern Electric Coop's 2025 rate works out to about $1,321 a year, $198 less than at Illinois's average rate of 17.67¢. Of the 25 Illinois utilities in our data with a 2025 price, it is the 13th most expensive.
Southwestern Electric Coop served 22,093 homes in 2015 and 24,414 in 2025 (+10.5%), under 1% of Illinois's residential electricity customers.
Who sets Southwestern Electric Coop's rates
Southwestern Electric Coop is a member-owned electric cooperative. A board elected by its members sets its rates. In some states the Illinois Commerce Commission also reviews co-op rates, but most co-op rate changes do not go through a commission rate case, so watch the co-op's own member notices and board meetings.
Commission contact: Illinois Commerce Commission. How we calculate every figure on this page: methodology.
Questions
Is Southwestern Electric Coop raising rates in 2026?
Southwestern Electric Coop's rates are set by its member-elected board, not through a rate case at the Illinois Commerce Commission, so check its own notices for a change this year. Its average residential rate moved +12.3% from 2024 to 2025.
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, which every US utility files. 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)