Southwestern Electric Co-op electricity rates
Electric cooperative · Illinois · SERC region · MISO
Southwestern Electric Co-op is a member-owned electric cooperative, so its customers own it and elect its board, serving 24,414 homes in Illinois. Its residential customers pay an average of 16.32¢/kWh including fixed and delivery charges, 9% less than the U.S. average.
Rate basis: EIA-861 2025 annual data, adjusted to the 12 months ending 2026-07 using the state's price trend.
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Southwestern Electric Co-op bill estimates
| Monthly use | At average all-in rate | Base tariff charges* |
|---|---|---|
| 500 kWh | $81.60 | $81.97 |
| 1,000 kWh | $163.20 | $140.69 |
| 1,500 kWh | $244.80 | $199.42 |
| 2,000 kWh | $326.40 | $258.14 |
*Farm, Residential and Public buildings (RES01, RESO2, ANN04, PUB11) (effective 2013-09-01, $23.24/month customer charge), energy and fixed charges from the OpenEI Utility Rate Database. Riders, fuel adjustments and taxes are often billed separately, so real bills usually land closer to the all-in column. Calculate your bill.
Southwestern Electric Co-op residential rate plans
| Plan | Effective | Customer charge | Energy charges |
|---|---|---|---|
| Farm, Residential and Public buildings (RES01, RESO2, ANN04, PUB11) | 2013-09-01 | $23.24 | 11.74¢ first 2,000 kWh, 8.45¢ after |
| Three-Phase Service for Religious Facilities (Rate Rel16)time-of-use | nan | $56.68 | 15.3¢ (12am–12am) — summer weekdays |
| Farm, Residential and Public buildings With Street Lighting (RES03) | 2013-09-01 | $28.30 | 11.74¢ first 2,000 kWh, 8.45¢ after |
| Electric Heat Rate With Street Lighting (Rates ELH06) | 2013-09-01 | $28.30 | 11.74¢ first 2,000 kWh, 8.45¢ after |
Source: OpenEI U.S. Utility Rate Database. Rates change. Check the linked tariff or your bill for current figures.
Southwestern Electric Co-op rate history
2015–2025: +16% change in the average residential rate (13.26¢ → 15.37¢). Annual EIA-861 data.
Outages & reliability
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Reliability history
| 2025 | Southwestern Electric Co-op | Illinois avg | U.S. avg |
|---|---|---|---|
| Outage minutes per customer (SAIDI) | 241 | 148 | 266 |
| Outages per customer (SAIFI) | 1.92 | 0.87 | 1.34 |
| Average restoration time (CAIDI) | 2 hr 6 min | — | — |
| Outage minutes excluding major storms | 195 | 63 | 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 Electric Co-op's counties, customers averaged 6 hr 33 min without power.
| County | Outage min/customer | Days with outages | Peak customers out | Worst day |
|---|---|---|---|---|
| Shelby | 621 | 75 | 1,620 | 2025-05-09 |
| Macoupin | 498 | 63 | 4,693 | 2025-05-16 |
| Clinton | 486 | 65 | 5,009 | 2025-02-02 |
| Fayette | 463 | 55 | 2,330 | 2025-07-11 |
| Madison | 447 | 47 | 18,731 | 2025-05-16 |
| St Clair | 398 | 66 | 18,062 | 2025-03-15 |
| Marion | 274 | 38 | 2,248 | 2025-05-30 |
| Montgomery | 260 | 48 | 1,063 | 2025-11-19 |
| Bond | 239 | 36 | 1,557 | 2025-09-21 |
| Effingham | 154 | 39 | 3,249 | 2025-07-21 |
| Clay | 41 | 14 | 816 | 2025-09-20 |
Southwestern Electric Co-op service area
Southwestern Electric Co-op serves 11 counties in Illinois and 57 ZIP codes.
Bond, Clay, Clinton, Effingham, Fayette, Macoupin, Madison, Marion, Montgomery, Shelby, St Clair
Cities: Belleville, Upper Alton, East Saint Louis, Alton, Edwardsville, Troy, Highland, Bethalto, Vandalia, Greenville, Staunton, Lebanon, Carlyle, Holiday Shores, Trenton, Altamont, Brighton, Nokomis, Aviston, Bunker Hill, Saint Elmo, Saint Jacob, Worden, Ramsey
Programs, smart meters & solar
| Smart meters (AMI) for homes | 100% |
| Customers with daily usage data online | 24,414 |
| Time-based rate programs | None reported |
| Net-metered solar homes | 0 reported |
Southwestern Electric Co-op at a glance
| Ownership | Electric cooperative |
| Services | Distribution |
| Commercial rate | 15.14¢/kWh |
| Industrial rate | 10.65¢/kWh |
| Retail revenue (2025) | $74,383,800 |
| Electricity sold (2025) | 526,958 MWh |
| Peak demand | 120 MW summer · 92 MW winter |
| Line losses | 3.6% |
| Balancing authority | MISO |
| EIA utility ID | 17697 |
Other utilities in Illinois
Frequently asked questions
What is Southwestern Electric Co-op's electricity rate?
Southwestern Electric Co-op residential customers pay an average of 16.32¢ per kWh, all charges included (EIA-861 2025 annual data, adjusted to the 12 months ending 2026-07 using the state's price trend). That's 13% below the Illinois average of 18.79¢ and 9% below the U.S. average.
What is the average Southwestern Electric Co-op electric bill?
About $189 a month. The average Southwestern Electric Co-op home uses 1,160 kWh a month. At 1,000 kWh the bill would be about $163.
How many customers does Southwestern Electric Co-op have?
Southwestern Electric Co-op serves 24,414 residential customers and 24,885 customers in total in Illinois, across 11 counties.
How reliable is Southwestern Electric Co-op?
In 2025, the average Southwestern Electric Co-op customer was without power for 4 hr 1 min (SAIDI) over 1.92 interruptions (SAIFI), including major storms. Excluding major event days it was 3 hr 15 min. The Illinois average was 2 hr 28 min and the U.S. average 4 hr 26 min.
Does Southwestern Electric Co-op offer time-of-use rates?
Yes. The OpenEI rate database lists 1 time-of-use residential plan, including Three-Phase Service for Religious Facilities (Rate Rel16). 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 Electric Co-op before making decisions.