The table below shows Illinois Energy's FlexPlan® variable rates and Peoples Gas' gas supply costs for the past 12 months.
| Offer Month | FlexPlan Variable Rate | Peoples Gas' Supply Cost |
|---|---|---|
| Oct 2025 | $0.488/per therm | $0.3025/per therm |
| Sep 2025 | $0.489/per therm | $0.3005/per therm |
| Aug 2025 | $0.510/per therm | $0.4315/per therm |
| Jul 2025 | $0.503/per therm | $0.4941/per therm |
| Jun 2025 | $0.511/per therm | $0.5543/per therm |
| May 2025 | $0.503/per therm | $0.5900/per therm |
| Apr 2025 | $0.575/per therm | $0.5279/per therm |
| Mar 2025 | $0.592/per therm | $0.4070/per therm |
| Feb 2025 | $0.621/per therm | $0.3894/per therm |
| Jan 2025 | $0.655/per therm | $0.3345/per therm |
| Dec 2024 | $0.608/per therm | $0.3173/per therm |
| Nov 2024 | $0.447/per therm | $0.3212/per therm |