Ameren Illinois customers, Illinois · Rebate
Savings for Home Insulation Upgrades (Ameren Illinois)
Run by Ameren Illinois Energy Efficiency Program
Ameren Illinois customers get per-unit discounts on insulation ($1.10 per sq. ft. for attics and walls), air sealing, rim joists, crawl space walls and exhaust ventilation, installed by a Program Ally contractor after a home energy assessment.
Amounts
How much you get
Discount rates per unit of work for 2026, shown on the Program Ally's project application and taken off the invoice. The amount depends on which of these fits your install.
| What you install | You get |
|---|---|
| Attic insulation (per sq. ft.) | $1.1 |
| Wall insulation (per sq. ft.) | $1.1 |
| Rim joist (per linear ft.) | $2.5 |
| Crawl space wall insulation (per linear ft.) | $3.75 |
| Air sealing (per CFM of air leakage reduced) | $0.7 |
| ASHRAE exhaust ventilation (per residence) | $225 |
Eligibility
Do I qualify?
You need to meet all 2 of these, plus one that applies only in some cases.
Ameren Illinois residential customer; eligibility is checked with a short online form.
A home energy assessment by the Program Ally comes first; the project application estimates the discounts.
What to doAsk a Program Ally for a Home Energy Assessment through the Ameren Illinois Energy Efficiency Program.
- Only in some cases
Only registered Ameren Illinois Program Allies can offer the incentives.
What to doPick a Program Ally listed under "Insulation, Air Sealing and Ventilation" in Ameren's contractor finder.
Equipment
What equipment counts
Applying
How to apply
Your contractor applies for you. Get approved before you buy anything.
- See if you qualify.
Complete the short eligibility form.
- Find a Program Ally.
Choose "Insulation, Air Sealing and Ventilation" in the contractor finder. You may get quotes from several.
- Home Energy Assessment.
The Program Ally assesses the home and gives you a project application with estimated discounts and out-of-pocket cost.
- Upgrade.
When you agree, the Program Ally completes the work with the discount applied.
Forms and instructionsSave Today on Home Insulation Upgrades (2026 discount rates) - Ameren Illinois
Questions about applying1.866.838.6918
Stacking
Use it with
Your address
Next steps
Check that it covers your address. This program has to approve you before you buy anything, so start with the program, not a contractor quote.
Is it available at your address?
Before anything else
Pick a Program Ally listed under "Insulation, Air Sealing and Ventilation" in Ameren's contractor finder.
Your quote request is in If a contractor we work with serves your ZIP, they can contact you. We take one request per person; contact us to change it.
Get an email if this program changes
We'll write if its amount, status or deadline changes. Nothing else.
FAQ
Questions
How much does Savings for Home Insulation Upgrades (Ameren Illinois) pay?
$0.7 to $225, depending on what you install. The table under How much you get lists each amount.
Do I need to be a Ameren Illinois customer?
Yes. It’s only for homes in Ameren Illinois customers, Illinois. See Do I qualify for the details.
Do I have to use a contractor?
Yes. Only registered Ameren Illinois Program Allies can offer the incentives.
Do I need approval before I buy?
Yes. Apply before you buy or install anything; purchases made first don’t qualify. A home energy assessment by the Program Ally comes first; the project application estimates the discounts. Ask a Program Ally for a Home Energy Assessment through the Ameren Illinois Energy Efficiency Program.
Is it still available?
Yes. It was open when we last checked, on October 27, 2026.
Plain words
Words used on this page
References
Sources
This page is built from these official pages, run by the program itself.
- Savings for Home Insulation Upgrades - Ameren Illinois Energy Efficiency Program
- Save Today on Home Insulation Upgrades (2026 discount rates) - Ameren Illinois
When one of these pages changes, we re-check this page against it.
Nearby
More in Illinois
Ameren Illinois customers, Illinois
Home Efficiency Income Qualified Initiative (Ameren Illinois)
Amount varies
Income-qualified Ameren Illinois households in single-family homes get a free home energy assessment and free energy-saving products, and may get insulation, air sealing, ventilation, heating upgrades and a switch from propane to electric heat at little to no cost.
Checked Oct 27, 2026
Ameren Illinois customers, Illinois
Mobile Home Initiative (Ameren Illinois)
Work done at no cost
Income-qualified Ameren Illinois customers living in mobile homes get a free home energy assessment and a free energy savings kit; select homes also get a new furnace or heat pump, insulation, a smart thermostat or air and duct sealing at no cost.
Checked Oct 27, 2026
Ameren Illinois customers, Illinois
On-Bill Financing (Ameren Illinois)
Amount varies
Ameren Illinois customers can borrow $500 to $20,000 at a fixed 7.49% for 1 to 10 years for efficiency upgrades, with no fees or collateral, and repay it on their Ameren Illinois bill.
Checked Oct 27, 2026