Ameren Illinois Company
6 residential tariffs on file in IL, ranging from $0.1900 to $0.4680 per kWh at 1,000 kWh a month.
The gap between this utility's cheapest and most expensive residential tariff is $3,336 a year for a household using 1,000 kWh a month. Tariffs are not always open to everyone — some require electric heating, a demand meter or program enrollment — so check eligibility with the utility before switching.
Residential tariffs
| Tariff | Structure | Filed | Fixed/mo | $/kWh @1,000 | Annual |
|---|---|---|---|---|---|
| DS-1 Residential Zone 1 | Time-of-use + tiered | 2026 | $14.01 | $0.1900 | $2,280.04 |
| DS-1 Residential Zone 2 | Time-of-use + tiered | 2026 | $14.01 | $0.1903 | $2,284.12 |
| DS-1 Residential Zone 3 | Time-of-use + tiered | 2026 | $14.01 | $0.1954 | $2,344.61 |
| DS-1 Residential Zone 2 | Time-of-use + tiered | 2026 | $14.01 | $0.2286 | $2,743.58 |
| DS-1 Residential Zone 1 | Time-of-use + tiered | 2026 | $14.01 | $0.2337 | $2,804.07 |
| DS-1 Residential Zone 3 ⚠ | Time-of-use + tiered | 2026 | $14.01 | $0.4680 | $5,616.03 |
Solar and net metering
Ameren Illinois Company reports 31,572 residential solar installations to the EIA, totalling 314.974 MW. That means exported power is likely to earn something here, though what an exported kWh is worth depends on state rules rather than on the tariff in most cases.
For reference, Ameren Illinois Company collected an average of $0.1176 per kWh from residential customers in the most recent EIA survey, across all its tariffs and all usage levels. A single tariff priced at 1,000 kWh a month will differ from that blended figure.