Commonwealth Edison Co Electricity Rates and Average Bill (Illinois)
Data through May 2026 (the latest month EIA has published) · Updated August 14, 2026
As of May 2026, Commonwealth Edison Co's residential customers in Illinois paid an average effective rate of 28.89¢/kWh with an average monthly bill of $115.18, per EIA Form 861-M data. That rate is 5.0¢ above the Illinois average of 23.85¢/kWh; the U.S. average is 18.44¢/kWh.
Rate trend vs the Illinois average
View this chart as a table (last 12 months)
| Month | Rate (¢/kWh) | Avg bill ($/mo) | Avg usage (kWh/mo) |
|---|---|---|---|
| June 2025 | 18.99 | 152.40 | 803 |
| July 2025 | 16.75 | 158.17 | 944 |
| August 2025 | 18.42 | 143.30 | 778 |
| September 2025 | 18.62 | 100.21 | 538 |
| October 2025 | 18.04 | 88.22 | 489 |
| November 2025 | 17.63 | 87.38 | 496 |
| December 2025 | 18.03 | 105.96 | 588 |
| January 2026 | 16.89 | 111.31 | 659 |
| February 2026 | 17.71 | 104.66 | 591 |
| March 2026 | 18.33 | 95.52 | 521 |
| April 2026 | 20.91 | 95.83 | 458 |
| May 2026 | 28.89 | 115.18 | 399 |
Commonwealth Edison Co vs Illinois vs the U.S.
| Commonwealth Edison Co | Illinois | U.S. average | |
|---|---|---|---|
| Rate (May 2026) | 28.89¢/kWh | 23.85¢/kWh | 18.44¢/kWh |
| Average monthly bill | $115.18 | $122.65 | $135.70 |
| Average monthly usage | 399 kWh | 514 kWh | 736 kWh |
| Rate change, 1 year | +50.9% | +28.4% | +6.2% |
Estimate a bill at Commonwealth Edison Co rates
Worked example: 1,000 kWh at Commonwealth Edison Co's average effective rate of 28.89¢/kWh is about $288.90. The utility's actual average usage is 399 kWh/month, which produces the $115.18 average bill. This is an all-in average (energy, delivery, fixed charges, riders); your tariff's marginal price will differ.
See the full Illinois rate trend, look up another utility by ZIP code, or read why electric bills are rising.
Source: EIA Form 861-M (monthly utility-level sales to ultimate customers, residential), published with roughly a two-month lag. Rate = revenue ÷ sales; bill = revenue ÷ customers. Months failing basic sanity screens are excluded. See methodology.