Is Solar Worth It in Illinois?
Yes — solar is financially attractive in Illinois.
State incentives (including adjustable block program and net metering) and rising rates support payback in 7–10 years.
Average Cost of Solar in Illinois (2026)
The total cost of a residential solar system depends on system size, roof type, and installer pricing.
Typical 6–8 kW system:
- Average cost before incentives: $15,000 – $22,000
- Federal tax credit (30%): -$4,500 – $6,600
- Average net cost after federal credit: $10,500 – $15,400
The federal 30% Residential Clean Energy Credit is administered through the Internal Revenue Service.
Typical systems are 6–8 kW.
Solar Incentives in Illinois
1. Federal Solar Tax Credit (30%)
30% of installation costs deductible from federal taxes.
2. Net Metering
Illinois has net metering; excess generation earns credits.
3. Illinois Solar for All / Adjustable Block
State has had incentive programs for distributed solar. Check current programs at DSIRE or state energy office.
Electricity Rates in Illinois
Illinois rates are often near or above the national average.
A typical Illinois homeowner spends $1,400–$2,200 per year on electricity.
Solar can offset most or all of this cost.
Payback Period in Illinois
Most homeowners see:
- Payback period: 7–10 years
- 25-year savings: $28,000–$58,000+
Savings depend on roof orientation, local utility rates, system size, and financing method.
Best Cities for Solar in Illinois
Solar performs well statewide, but adoption is strongest in:
- Chicago
- Aurora
- Naperville
- Rockford
- Joliet
Suburban homes with south-facing roofs tend to achieve the highest ROI.
Is Solar Worth It in Illinois? (Summary)
Solar makes the most sense if:
- You plan to stay 7+ years
- Your roof gets good sun
- Your bills exceed $120/month
- You qualify for the federal tax credit
Solar is a strong fit for most Illinois homeowners.
How to Calculate Your Illinois Solar Savings
Every home is different.
To get a personalized estimate, use the calculator on this page: enter your ZIP, monthly bill, and optional system size to see projected savings and payback.