IL · Investor Owned · serves 893 ZIP codes
Ameren Illinois Company rate plans
2 residential plans are currently open to new customers. None of them price by hour, so shifting when you use power won’t change your bill here.
How much does the plan you pick actually matter here?
Run the same three-bedroom house with central air through every plan Ameren Illinois Company files, and the bill lands anywhere between $2,212 and $5,089 a year. That $2,876 spread is not a difference in electricity — it is the same kilowatt-hours, from the same wires, priced under different rules. Nobody sends you a letter when you are on the wrong side of it.
None of these 2 plans price by the hour, so when you use electricity here makes no difference to what you pay — only how much. That narrows your options to two levers: use less, or pick the plan whose fixed charge and tier structure suit your size of household.
Which plan would cost you least?
No bill upload, no sign-up. Tell us roughly what you use and what runs on electricity — we price every plan against the same household and show you the gap.
That adds up to 7,914 kWh a year. Compare it to the total on your bill and adjust until it’s close.
Same usage, different plan
$1,897a year
That is the gap between the cheapest plan you could be on — DS-1 Residential Zone 2 — and the priciest. Not by using less power. By being billed differently for the same power.
| Plan | Per year | Vs best |
|---|---|---|
| DS-1 Residential Zone 2The hour never matters here — only the season. Rates peak October–May. | $1,897 | — |
| DS-1 Residential Zone 3The hour never matters here — only the season. Rates peak June–September. | $3,795 | +$1,897 |
An estimate, not a quote. Supply charges move month to month, and your real usage pattern is not exactly this one. What it does show reliably is the gap between plans — both are priced off the same assumptions.
Making sense of the bill
- How to read your electric bill
Four kinds of charge, only two of which you can do anything about.
- Fixed charges on your electric bill: what they are and why they matter
The line that makes cents-per-kilowatt-hour comparisons quietly wrong.
- How to compare electricity plans without getting it wrong
Six things that break a comparison, and the order to check them in.
Every plan, in detail
Hour-by-hour schedules, tier thresholds, and the tariff each one comes from.