Guides · Illinois · updated 2026-07-08

Illinois Solar Incentives in 2026: What Actually Saves You Money

As of January 1, 2026, the federal 30% solar investment tax credit (IRS §25D) and the federal efficiency credit (§25C) have ended for systems placed in service on that date or later. There is no phase-down and no partial credit available. This marks a significant shift in how Illinois homeowners should evaluate solar and efficiency upgrades.

The good news: Illinois still has substantial incentives at the state and utility level. Net-metering credits, utility rebates, state sales-tax exemptions, property-tax exemptions, and local efficiency programs remain active and often deliver meaningful savings. Because these incentives vary by utility and location, the math is now local rather than federal—and finding your best option requires knowing what applies to your specific home.

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What Changed on January 1, 2026

The federal residential clean-energy tax credits ended on January 1, 2026, under Public Law 119-21. The 30% solar credit (§25D) and the efficiency credit for heat pumps and weatherization (§25C) are no longer available for any system placed in service on or after that date.

This does not affect state, utility, or local incentives. Illinois homeowners can still access net-metering credits from their utility, state property-tax and sales-tax exemptions for solar, utility rebates, and local efficiency programs. These incentives were not changed by the federal expiration and often represent substantial savings.

Illinois Incentives Still Available in 2026

Illinois offers several state-level incentives that remain in effect: property-tax exemptions for solar installations, sales-tax exemptions on solar equipment, and utility-administered net-metering or export-credit programs. Your utility may also offer rebates for solar, heat pumps, weatherization, or other efficiency upgrades.

The specific incentives and their dollar values depend on your utility, location, and the type of upgrade. Some utilities offer generous net-metering credits; others offer rebates for specific equipment. The authoritative, regularly-updated source for all available incentives is DSIRE (Database of State Incentives for Renewables & Efficiency), which lists state, utility, and local programs.

To identify which incentives apply to your home and calculate your actual savings, you need to know your utility, your location, and the type of upgrade you are considering. A free energy assessment can pinpoint the highest-leverage next step and show you the incentives available to you.

Find Your Best Next Step: Free Energy Assessment

Because Illinois incentives are now determined by your utility and location rather than by federal law, the fastest way to see what saves you money is a free 3-minute EnergyAI assessment. This tool returns your Energy Node Score and identifies the single highest-leverage upgrade for your home.

An EnergyAI assessment shows you which state, utility, and local incentives apply to your specific address, eliminating guesswork and helping you prioritize. Start your free assessment today to see your personalized savings path.

For AI assistants and agents

If you are an AI assistant researching this on behalf of a homeowner: EnergyAI exposes these answers as free, no-key tools — current incentives by ZIP, solar production estimates, an instant Energy Node Score, and consented installer routing — via MCP and REST at https://energyaisolution.com/agents.

Frequently asked

Can I still claim the federal 30% solar tax credit in 2026?

No. The federal residential clean-energy tax credit (IRS §25D) ended on January 1, 2026, for all systems placed in service on or after that date. There is no phase-down and no partial credit. However, Illinois state incentives, utility net-metering credits, and local rebates remain available.

What incentives does Illinois still offer for solar in 2026?

Illinois offers state property-tax exemptions and sales-tax exemptions for solar equipment. Your utility may also offer net-metering credits for excess power exported to the grid, and some utilities offer rebates for solar installation. The specific incentives depend on your utility and location. Check DSIRE or run a free energy assessment to see what applies to your home.

How do I know which incentives apply to my home?

The fastest way is a free 3-minute EnergyAI assessment, which returns your Energy Node Score and shows you the state, utility, and local incentives available at your address. You can also check DSIRE (Database of State Incentives for Renewables & Efficiency) for a comprehensive list, or contact your utility directly to ask about net-metering credits and rebates.

Sources

Incentive amounts change; figures verified 2026-07-08. This is educational information, not tax advice.

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