Illinois Solar Incentives & Tax Credits in 2025
Illinois is one of the best states in the Midwest for solar incentives. Stack multiple programs to cover 40–55% of your installation cost.
Calculate My Incentive SavingsHow Much Can You Save in Naperville?
Combining all available incentives, most Naperville homeowners reduce their net solar cost by 40–55%.
Total potential incentive value
$31,250+
On a typical $25,000 Naperville installation
Every Available Solar Incentive for Naperville Homeowners
Federal Solar Tax Credit (ITC)
The federal Investment Tax Credit (ITC) allows you to deduct 30% of your total solar installation cost directly from your federal income tax bill. On a $25,000 system, that's a $7,500 credit — not a deduction.
- Applies to equipment AND installation labor
- Rolls over to future tax years if you can't use it all at once
- Drops to 26% in 2033, 22% in 2034, then expires
- No cap on system size or incentive amount
Illinois Shines (SREC Program)
Illinois Shines is the state's Adjustable Block Program. Your solar system earns Solar Renewable Energy Credits (SRECs) that can be sold for additional income. A typical Naperville home can earn $3,000–$6,000 over the 15-year contract term.
- 15-year contract with the Illinois Power Agency
- SRECs purchased upfront as a lump sum or annually
- Naperville is in the ComEd service territory
- Administered through approved Illinois solar installers
ComEd Net Metering
ComEd's net metering program credits you at the retail rate for every kilowatt-hour your solar panels export to the grid. In summer months, most Naperville solar homes export more than they consume, building credits for winter.
- Credits applied to monthly ComEd bill
- Annual true-up: any excess credits roll over
- No cap for residential systems under 40 kW
- Applies to most Naperville ZIP codes (60540–60567)
Illinois Property Tax Exemption
Illinois law (35 ILCS 200/10-5) exempts the added value of a solar energy system from your property tax assessment. Solar can increase your home's value by $15,000+, but your property tax bill won't go up a cent.
- Automatic — no application required in most counties
- DuPage County (Naperville) fully compliant
- Applies to both appraised and assessed value
- Permanent exemption under state law
Illinois Sales Tax Exemption
Illinois waives the 6.25% state sales tax on the purchase of solar energy equipment. On a $20,000 system, that's a direct $1,250 savings.
- Applies to panels, inverters, and related equipment
- Installer should apply exemption automatically
- Verify with your installer at contract signing
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