Illinois Solar Incentives, Tax Credits & Rebates Guide (2025)

Illinois State Solar Incentives

Illinois offers multiple incentive programs that further reduce the cost of going solar. The primary state-level benefit is SREC program.

Solar Renewable Energy Credits (SRECs)

Illinois participates in a Solar Renewable Energy Credit market. For every 1,000 kWh (1 megawatt-hour) your system produces, you earn one SREC that can be sold to utilities required to source a percentage of their energy from renewables.

How it works:

• Your system's production is tracked and certified
• You receive SRECs that can be sold on the open market
• SREC prices fluctuate but can provide an additional $100-$300 per year in income for a typical 8 kW system
• This income continues for the life of your system

Net Metering in Illinois

Net metering is one of the most valuable ongoing benefits for solar owners in Illinois. It allows you to send excess electricity your panels produce back to the grid in exchange for credits on your utility bill.

How net metering works:

• During sunny days, your panels often produce more electricity than your home uses—this excess flows back to the grid
• Your meter literally runs backward, crediting your account
• At night or on cloudy days when your panels produce less, you draw from the grid using your banked credits
• This effectively uses the grid as a free battery, maximizing your solar investment

Net metering in Illinois:

Illinois has favorable net metering policies. Most utilities in the state credit you at or near the full retail rate for excess electricity—meaning every kilowatt-hour you send to the grid offsets a kilowatt-hour you would otherwise buy at full price.

For a typical 8 kW system in Illinois, net metering increases your annual savings by approximately $239-$399 compared to a scenario without net metering.

Maximizing Incentives with Smart Financing

How you finance your solar system affects which incentives you can claim. Understanding this is critical to maximizing your financial benefits.

Cash Purchase

Paying cash gives you access to all available incentive programs and the fastest payback period. You qualify for applicable incentives plus state programs, and you own the system outright from day one.

• Pros: Highest lifetime savings, no interest charges, immediate ownership
• Cons: Requires significant upfront capital ($24k-$31k for most systems)

Solar Loans

Solar loans let you own the system while spreading payments over 5-25 years. Many Illinois home buyers find their loan payment is equal to or less than their previous electric bill, meaning they save money from month one.

• Pros: No upfront cost, you keep all incentives, builds home equity
• Cons: Interest charges reduce overall savings compared to cash purchase

Solar Leases and PPAs

With a lease or Power Purchase Agreement, you don't own the system—a solar company does. They may access available incentives and programs, passing some of those savings to you through lower monthly payments or discounted electricity rates.

• Pros: $0 down, no maintenance responsibility, predictable costs
• Cons: You don't own the system, lower lifetime savings, may complicate home sales

For most Illinois home buyers, a cash purchase or solar loan typically provides significantly better long-term value than leasing.

Future Changes to Solar Incentives

Solar incentives have evolved significantly over the past decade, and they'll continue to change:

State Policy Changes

Illinois solar policies can change over time. Net metering rates, state tax credits, and utility rebate programs are all subject to legislative and regulatory changes.

The good news: most policy changes include grandfather clauses that protect existing solar owners. Installing now typically locks you into current favorable rates and policies, even if they become less generous for future installations.

The Bottom Line on Timing

While solar will likely remain a good investment for years to come, current incentives in Illinois are among the most generous available. The combination of available incentives and other programs, state incentives, and favorable net metering creates an optimal window for going solar.

Solar Loan vs Lease vs PPA: Quick Comparison