Illinois Solar Incentives
Illinois Solar Incentives & Payback in 2026
A residential Illinois solar system typically costs $15,000 to $30,000 and pays back in roughly 8 to 10 years through bill savings and Illinois Shines SREC payments. Here is what is actually available in 2026, with real numbers and sources.
Last updated: July 2026
Illinois Incentives at a Glance
Ongoing per-kWh payments
Illinois Shines (SREC)
Paid through the state Adjustable Block Program for every kWh your system produces. Block pricing phases down as each block fills, so confirm the current rate before relying on a specific figure.
20 years
IL Property Tax Exemption
The added home value from a solar installation is exempt from Illinois property tax increases for 20 years.
On qualifying equipment
ComEd Rebates
ComEd Energy Efficiency rebates apply to qualifying heat pumps and other equipment paired with a solar install.
Up to 30%+
Commercial ITC (Section 48E)
Active for businesses, farms, and nonprofits. New projects must be placed in service by December 31, 2027.
Federal Residential Credit Expired December 31, 2025
The One Big Beautiful Bill Act (signed July 4, 2025) eliminated the 30% residential solar tax credit (Section 25D), effective December 31, 2025. Illinois state incentives above are unaffected. The commercial ITC (Section 48E) is still active for business, farm, and nonprofit solar.
Sample Payback Calculation
This is an illustrative example, not a quote. SPM runs a custom energy assessment and payback estimate for every home.
| System size | Typical mid-size residential array |
| System cost | ~$22,000 (mid-point of the $15,000 to $30,000 typical range) |
| Monthly savings | $210/mo (SPM customer average) |
| Annual savings | $2,520/yr |
| Simple payback (bill savings only) | ~8.7 years |
| Panel lifespan | 25 years, so 15+ years of savings after payback |
Illinois Shines SREC payments and any financing terms are on top of this and generally shorten payback further. Actual results vary by roof, usage, and utility rate.
Common Questions
How much do solar panels cost in Illinois?
Most Illinois residential solar systems cost $15,000 to $30,000 before incentives, depending on system size and roof complexity. SPM sizes solar after reducing your home’s energy demand first (windows, siding, HVAC), which typically lowers the system size and total cost versus a system sized around your current usage.
What is the payback period for solar in Illinois?
For a typical $22,000 residential system, using the SPM customer average of $210/month in bill savings ($2,520/year), payback lands around 8 to 10 years before counting Illinois Shines SREC payments, well inside a panel’s 25-year lifespan. Your actual payback depends on system size, usage, and current utility rates. SPM runs a custom calculation for every home.
What Illinois solar incentives are available in 2026?
Illinois homeowners going solar in 2026 can access Illinois Shines SREC payments (ongoing per-kWh payments through the state’s Adjustable Block Program), a 20-year Illinois property tax exemption on the added home value, and ComEd rebates on qualifying paired equipment. The federal 30% residential tax credit (Section 25D) expired December 31, 2025.
Does ComEd still offer net metering for solar in 2026?
Yes, but the terms changed under the Climate and Equitable Jobs Act. Systems interconnected after December 31, 2024 move to supply-only net metering, where export credits are based on the supply portion of your rate rather than the full retail rate. Systems interconnected before that date generally keep their prior net metering terms. Confirm your exact interconnection date and rate class with ComEd.
Is there still a federal tax credit for solar in Illinois?
Not for residential cash or loan purchases: the 30% federal residential solar tax credit (Section 25D) expired December 31, 2025. It is still available to solar lease and PPA customers indirectly, since the leasing company claims the commercial credit and passes savings through lower payments. The commercial ITC (Section 48E) remains active for businesses, farms, and nonprofits, covering projects placed in service by December 31, 2027.
See Your Actual Payback Number
In a free 2-minute estimate, we'll calculate your real system cost, savings, and payback using your own bills, not an average.