Ameren Illinois Rate Zone III supplier rates compared
Every certified electricity supplier offer for Ameren Illinois Rate Zone III residential customers in Illinois, ranked cheapest first. Ameren Illinois Rate Zone III still delivers your energy; you only choose who supplies it.
Find your cheapest Ameren Illinois Rate Zone III rate
Upload your most recent bill and I'll rank the 3 cheapest certified electricity plans for your real usage.
PDF, photo, or a usage CSV works. I read it instantly and rank your options.
Drop your bill to upload
Price to Compare
See bill
Cheapest fixed offer
10.70¢ ¢/kWh
Est. yearly saving vs default
—
14 offers. Click a column to sort.
- Rate:
- supply price per kWh
- Type:
- fixed or variable
- Green:
- share from renewables
- Term:
- contract length
- ETF:
- early termination fee
- Mo. fee:
- fixed monthly charge
- Est. yr cost:
- yearly total at your usage
| Supplier | Rate | Type | Green | Term | ETF | Mo. fee | Est. yr cost |
|---|---|---|---|---|---|---|---|
| SmartEnergy Holdings, LLC 12-Month Fixed-Rate Plan 100% Renewable Electricity | 10.70¢ | Fixed | 0% | 12 mo | $0 | $0 | — |
| Public Power, LLC Electric 12 Month Standard Fixed Rate | 10.99¢ | Fixed | 0% | 12 mo | $0 | $0 | — |
| Illinois Gas & Electric Power Lock 12 | 11.09¢ | Fixed | 0% | 12 mo | $0 | $0 | — |
| Constellation Energy 6 Month | 11.99¢ | Fixed | 0% | 6 mo | $0 | $0 | — |
| Constellation Energy 12 Month | 12.19¢ | Fixed | 0% | 12 mo | $0 | $0 | — |
| Public Power, LLC Electric 24 Month Standard Fixed Rate | 12.59¢ | Fixed | 0% | 24 mo | $0 | $0 | — |
| Illinois Gas & Electric Power Lock 24 | 12.69¢ | Fixed | 0% | 24 mo | $0 | $0 | — |
| Ambit Northeast, LLC Ultimate Perks 12 | 12.89¢ | Fixed | 0% | 12 mo | $0 | $0 | — |
| Constellation Energy 12 Month Plan - 100% Green | 13.19¢ | Fixed | 0% | 12 mo | $0 | $0 | — |
| SmartEnergy Holdings, LLC 6-Month Fixed-Rate Plan 100% Renewable Electricity | 13.30¢ | Fixed | 0% | 6 mo | $0 | $0 | — |
| Public Power, LLC Electric 36 Month Standard Fixed Rate | 13.99¢ | Fixed | 0% | 36 mo | $0 | $0 | — |
| Illinois Gas & Electric Power Lock 36 | 14.09¢ | Fixed | 0% | 36 mo | $0 | $0 | — |
| Ambit Northeast, LLC Winter Break 12 | 16.19¢ | Fixed | 0% | 12 mo | $0 | $0 | — |
| Ambit Northeast, LLC Winter Break 24 | 17.89¢ | Fixed | 0% | 24 mo | $0 | $0 | — |
Compiled from https://icc.illinois.gov/plugin/Offers (Illinois Commerce Commission) for Ameren Illinois Rate Zone III (residential), as of June 22, 2026. "Est. yr cost" = supplier rate × your usage + monthly fee × 12; excludes utility delivery charges, which you pay regardless of supplier. Variable and intro rates can change after the first bill. Confirm current terms on the supplier's site before enrolling.
Who has the cheapest electricity rate for Ameren Illinois Rate Zone III customers?
As of June 22, 2026, the lowest fixed residential rate listed for Ameren Illinois Rate Zone III is 10.70¢ ¢/kWh from SmartEnergy Holdings, LLC, on a 12-month term.
What is Ameren Illinois Rate Zone III's Price to Compare?
Ameren Illinois Rate Zone III doesn't publish a fixed Price to Compare benchmark. Compare supplier offers against the supply portion of your recent bill.
Does switching suppliers change who I call during an outage?
No. Ameren Illinois Rate Zone III still delivers your energy, reads your meter, and handles outages and emergencies. Only the supply portion of your bill — the generation charge — comes from the supplier you choose.
More ways to lower your bill
- How to lower your electric billShift usage off-peak, pick the right rate plan, and cut standby load.
- Bill spike diagnosis toolUpload a bill and see the most likely reason it jumped.
- Why did my bill double?The five causes we see most often in real interval data.
- Balcony solar calculatorModel plug-in solar payback at Illinois retail rates.
More free energy tools
Data last updated June 22, 2026. Compiled by Energy Advisor from published utility tariffs.