The table below shows Illinois Energy's PriceCap® Plan variable rates and Peoples Gas' gas supply costs for the past 12 months.
| Offer Month | PriceCap Variable Rate | Peoples Gas' Supply Cost |
|---|---|---|
| May 2026 | $0.452/per therm | $0.4599/per therm |
| Apr 2026 | $0.504/per therm | $0.4123/per therm |
| Mar 2026 | $0.504/per therm | $0.4067/per therm |
| Feb 2026 | $0.849/per therm | $0.3881/per therm |
| Jan 2026 | $0.729/per therm | $0.4181/per therm |
| Dec 2025 | $0.689/per therm | $0.4063/per therm |
| Nov 2025 | $0.541/per therm | $0.3446/per therm |
| 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 |