Illinois electricity rates
152 residential tariffs from 54 utilities. Across the 18 filed since 2020, the median costs $0.1195 per kWh at 1,000 kWh a month once fixed charges are included — the cheapest $0.0602, the most expensive $0.2337.
$0.1195median $/kWh
54utilities
152tariffs on file
43%time-of-use
13%filed since 2020
Rate structures in Illinois
| Structure | Tariffs |
|---|---|
| Flat | 59 |
| Time-of-use + tiered | 34 |
| Time-of-use | 31 |
| Tiered | 28 |
Lowest effective rates at 1,000 kWh/month
Ranked across the 18 tariffs filed since 2020 — 13% of those on file here. Older filings are excluded because they are systematically below what utilities now charge; see methodology. Effective rate includes fixed charges, and availability restrictions may apply.
| Utility | Tariff | Structure | Filed | $/kWh | Annual |
|---|---|---|---|---|---|
| Commonwealth Edison Co | RDS - Residential Multi Family With Electric Space Heat Delivery Class | Time-of-use | 2025 | $0.0602 | $722.88 |
| Commonwealth Edison Co | RDS - Residential Single Family with Electric Space Heat Delivery Class | Time-of-use | 2025 | $0.0667 | $800.04 |
| Commonwealth Edison Co | RDS - Residential Multi Family Without Electric Space Heat Delivery Class | Time-of-use | 2025 | $0.0779 | $934.44 |
| MidAmerican Energy Co | RATE GET - GENERAL ENERGY TIME-OF-USE SERVICE (Residential) | Time-of-use + tiered | 2026 | $0.0964 | $1,156.71 |
| MidAmerican Energy Co | RATE GE - GENERAL ENERGY SERVICE (Residential) | Time-of-use + tiered | 2026 | $0.1021 | $1,225.32 |
| MidAmerican Energy Co | RATE RST - RESIDENTIAL TIME-OF-USE SERVICE | Time-of-use | 2026 | $0.1061 | $1,273.53 |
| MidAmerican Energy Co | RATE RS - RESIDENTIAL SERVICE | Time-of-use + tiered | 2026 | $0.1100 | $1,320.20 |
| Commonwealth Edison Co | BES - Residential Multi Family With Electric Space Heat Delivery Class | Time-of-use | 2025 | $0.1112 | $1,333.96 |
| Commonwealth Edison Co | BES - Residential Single Family with Electric Space Heat Delivery Class | Time-of-use | 2025 | $0.1167 | $1,400.32 |
| City of Naperville, Illinois (Utility Company) | Residential | Flat | 2022 | $0.1223 | $1,467.24 |