DS-1 Residential Zone 1
Ameren Illinois Company · Time-of-use + tiered · filed 2026
What this tariff charges
| Fixed charge | $14.01 per month |
|---|---|
| Structure | Time-of-use + tiered |
| Filed | 2026-03-01 |
Energy rates
The charged price is the base rate plus its adjustment. Adjustments carry fuel and rider costs and are frequently most of the bill, so a comparison built on the base rate alone is meaningless.
Period 0
| Tier | Up to | Base | Adjustment | Charged $/kWh |
|---|---|---|---|---|
| 1 | 800.0 kWh | 0.04572 | 0.12234 | 0.16806 |
| 2 | no limit | 0.02427 | 0.12234 | 0.14661 |
Period 1
| Tier | Up to | Base | Adjustment | Charged $/kWh |
|---|---|---|---|---|
| 1 | no limit | 0.07811 | 0.12234 | 0.20045 |
What it costs at different usage levels
| kWh per month | Annual total | Effective $/kWh |
|---|---|---|
| 500 | $1,241.24 | $0.2069 |
| 1000 | $2,280.04 | $0.1900 |
| 2000 | $4,254.69 | $0.1773 |
Effective rate includes the fixed charge, which is why it falls as usage rises. This is a time-of-use tariff, so the result also depends on when power is used; an average residential pattern is assumed. Details →
Rooftop solar on this tariff
A 7 kW system costing $21,000 before incentives would save between $876 and $1,608 a year on this tariff, paying back in 13–24 years . No federal tax credit is included: Section 25D ended on December 31, 2025.
no sell rate filed, but this utility reports residential net metering - the range spans no export credit to full retail netting. Compare across this state →
The utility's own description
Delivery voltage for secondary rate for zone 1 Residential Seasonal Tiered rate Non Electric Heating Option supply rate http://www.ameren.com/sites/aiu/Rates/Documents/aiifhss113I.pdf Delivery Rate http://www.ameren.com/sites/aiu/Rates/Documents/aiifMAPP113.pdf
URDB rate id 69cbdbe1eb4316495b085c3b · utility source document · all Ameren Illinois Company tariffs