Illinois solar incentives in 2026, in one line: no federal credit for a system you buy, but Illinois Shines REC payments plus ComEd and Ameren rebates still cover a real share of the cost. Last updated: 16 October 2026.
Illinois Solar Incentives 2026 at a Glance
| Incentive | Status in 2026 | What it is worth |
|---|---|---|
| Federal residential credit (Section 25D) | Ended 31 Dec 2025 | $0 on a 2026 cash or loan purchase |
| Federal Section 48E (lease / PPA) | Claimed by the system owner, not you | Indirect – may show up as a lower lease or PPA rate; tightens after 2027 |
| Illinois Shines (Adjustable Block Program) | Active, capacity-limited | Up-front payment for 15 years of your system’s RECs, paid via an Approved Vendor (your installer) |
| Illinois Solar for All | Active | Larger incentives for income-qualified homes |
| ComEd / Ameren distributed generation rebate | Active | $300 per kW of solar (and $300 per kWh of storage) |
| Net metering | Changed 1 Jan 2025 | New systems get supply-only net metering; systems connected before 2025 keep full retail credits |
| Property tax | Active | Solar is assessed so it does not raise your property tax |
| State income tax credit | None | Illinois does not offer one |
Looking at solar in Illinois? Here is every incentive and rebate you can stack in 2026, and the headline has changed: the 30% federal tax credit expired at the end of 2025, so Illinois’s own programs are what is left. Illinois punches above its sun level thanks to the Illinois Shines program, which pays you for the power your system produces.
Illinois Solar Incentives in 2026
- No federal tax credit on a 2026 cash or loan purchase - Section 25D expired 31 December 2025. See solar tax credit 2026.
- Illinois Shines - an up-front payment for the renewable energy credits your system will produce.
- ComEd and Ameren rebates - $300 per kW of solar.
- Net metering - supply-only credits for systems connected from 2025.
- Property tax treatment that keeps solar from raising your bill.
What Solar Costs in Illinois
Illinois Shines is the headline benefit and offsets the more moderate sun. A typical 7 kW system runs about $21,000 before incentives. There is no federal tax credit in 2026, so only Illinois programs reduce that. Use the calculator above for your estimate.
Is Solar Worth It in Illinois?
Yes for many Illinois homeowners, largely because of the SREC income from Illinois Shines. See our full breakdown: Is Solar Worth It in 2026?
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Illinois Solar Incentives FAQ
What solar incentives does Illinois offer in 2026?
Illinois Shines REC payments, Illinois Solar for All for income-qualified homes, $300/kW rebates from ComEd and Ameren, net metering and property tax treatment for solar. There is no federal credit for a system you buy.
How does Illinois Shines pay?
Your installer (an Approved Vendor) sells 15 years of your system's renewable energy credits to the program and usually passes the value to you up front as a payment or a lower price. Capacity blocks fill up, so availability and the per-REC price change over time.
Are there solar rebates in Illinois?
Yes. ComEd and Ameren pay a distributed generation rebate of $300 per kW of solar, so roughly $2,000 for a 7 kW system, and $300 per kWh for battery storage.
Did Illinois net metering change?
Yes. Systems connected on or after 1 January 2025 get supply-only net metering, which credits exports at the supply portion of the rate rather than the full retail rate. Systems connected earlier are grandfathered.
Can I combine Illinois and federal incentives?
There is no federal credit left to stack on a 2026 cash or loan purchase - Section 25D ended 31 December 2025. Illinois incentives still stack with each other. With a lease or PPA, the system owner may claim Section 48E - see solar tax credit 2026.
Related
- Solar incentives by state
- Solar tax credit 2026: what changed
- Pennsylvania solar incentives
- Colorado solar incentives
- Net metering explained
- Solar panel cost
- Is solar worth it?
General 2026 guidance, not tax advice. Verify current Illinois program rules before purchasing.