IllinoisSolar Incentives 2026: Tax Credits, Rebates & Net Metering

Illinois does not offer a state income tax credit specifically for residential solar. Most homeowners rely on the 30% federal Residential Clean Energy Credit as the primary up-front incentive.

Even without a state income credit, Illinois's property tax exemption on solar equipment significantly reduce effective lifetime cost.

Illinois requires investor-owned utilities to offer net metering on residential solar systems. The credit rate is the full retail electricity rate.

In practice, this means a properly sized Illinois system can drive net annual electricity costs to within tens of dollars of zero. Top utilities operating under IL net metering rules include ComEd, Ameren Illinois.

Illinois credits exported solar at roughly ~100% of retail of the retail rate. See full Illinoisnet metering rates & rollover rules →

Solar installs in Illinois average $2.95 per watt in 2026. A typical 8 kW system runs about $23,600 before incentives. After the 30% federal credit, the net cost drops to roughly $16,520 — the real number most IL homeowners pay.

Your price moves with system size, roof complexity, and equipment tier. Run the Illinois savings calculator for a number matched to your actual electricity bill.

No — there is no government program handing out free solar in Illinois. “Free solar” and “no-cost solar program” ads are leases or power purchase agreements (PPAs): a company owns the panels, claims the 30% federal credit for itself, and bills you for the power.

Buying your system — with the incentives in your name — almost always wins on lifetime savings. Read the full breakdown of “free solar” offers →

2 major utilities operate in Illinois: ComEd, Ameren Illinois. Specific rebate availability varies year to year and is typically distributed first-come, first-served until annual budget caps are reached.

Before scheduling any installation, verify current rebate status directly with your utility — programs open and close throughout the year. Most Illinois installers will pull up-to-date rebate data during a site assessment.

Illinois excludes the added value of a residential solar system from property tax assessments. A homeowner whose property gains $15,000 in assessed value from a solar install pays no additional property tax on that increase, saving roughly $250 to $400 annually depending on local mill rates.

Illinois does not exempt solar equipment from sales tax, so installation invoices include standard sales tax on hardware components.

Illinois has an active Solar Renewable Energy Certificate (SREC) market. Homeowners earn one SREC for every megawatt-hour produced and sell them on the IL compliance market.

At current clearing prices, the average IL homeowner earns approximately $9,200 in SREC income over the first five years of operation. SREC values are volatile and depend on the state's Renewable Portfolio Standard compliance demand each year.

Compare Illinois's solar incentive package side-by-side with adjacent states to see whether you live in a relatively high- or low-incentive market.