Rebates and incentives, Illinois

Illinois solar tax credit and rebate estimator

No state tax credit, but Illinois Shines pays substantial money for your projected SREC production, half upfront and half over the following six years. See what that's worth alongside your property tax exemption.

Your system and property

1 Project details Optional
2 Illinois Shines value
Check your Approved Vendor for the current block price, since it steps down as each pricing block fills.
3 Net metering status
4 Property tax exemption
Illinois property tax rates run above the national average, commonly 1.8% to 2.5% depending on township.

How it works

Three steps to your Illinois result

Step 1

Enroll through an Approved Vendor

Illinois Shines requires working with an Illinois Power Agency Approved Vendor, since only they can register your system and process your payments under the current schedule. Check the SREC value estimator for the general math behind SREC-style programs.

Step 2

Confirm your net metering interconnection date

Whether you're grandfathered into full retail net metering or on the newer supply-only structure depends entirely on when your system connected relative to January 1, 2025.

Step 3

File your property tax exemption form

This isn't always automatic. Confirm with your township assessor that the correct form has been filed, and check low income program eligibility if your household might qualify for the more generous Illinois Solar For All program instead.

Why Illinois Shines works differently than a typical incentive

Faster than a slow trickle, though no longer a single lump sum

Most SREC programs pay homeowners over time as certificates are sold year by year. Illinois Shines works differently, and its payment timing itself changed for systems energized on or after June 1, 2026: rather than the older single upfront lump sum, you now receive 50% of your total REC value in year one, with the remaining 50% split into quarterly payments across years two through seven. Your Approved Vendor still determines the projected certificate quantity using system size, orientation, and shading, then values that quantity at the current Adjustable Block price. This gives homeowners a substantial, predictable payment close to installation, plus continued payments over the following six years, rather than a single check or a full 15-year wait.

Block pricing steps down as demand grows

The Adjustable Block Program divides its budget into pricing blocks that fill over time, and prices step down once a block is exhausted. Enrolling earlier in a higher-priced block generally locks in better value than waiting, so timing your application matters more in Illinois than in a program with a fixed, unchanging rate. Confirm the current price for your system size and utility territory directly on the Illinois Power Agency's own REC pricing documents rather than relying on a figure from a general guide like this one. Check the rebate deadline tracker to stay on top of this timing.

Net metering split into two tiers

Illinois moved to a supply-only net metering model for systems interconnected on or after January 1, 2025, crediting exported power against supply charges only rather than your full bill including delivery and transmission. Homeowners grandfathered in before that date keep full retail net metering for the life of their system, which is a meaningfully better deal. If you're comparing this against a full federal ITC calculation, check the federal ITC calculator as well, since federal rules also changed significantly for 2026.

Low-income households have a stronger path

Illinois Solar For All offers a substantially better financial deal than the standard Illinois Shines program for income-qualified households, in some cases covering the entire upfront cost. If your household income is at or below 80% of area median income, that program is worth checking before assuming standard Illinois Shines terms apply to you. Compare against the Indiana incentive estimator for a neighboring state's structure.

If you borrow for the rest of the system, the combined loan and rebate timing tool takes your rebate total and works out the monthly payment on the balance.

Questions

Frequently asked

No, not in the traditional sense. Illinois's main financial incentive is Illinois Shines, the state's Adjustable Block Program, which pays for solar renewable energy certificates rather than functioning as a tax credit. Some guides mislabel this as a credit or cite an incorrect dollar cap, so don't expect a line item on your Illinois income tax return the way you would in a state with a true state credit.

Unlike an SREC market where you sell certificates year by year, Illinois Shines pays homeowners based on your system's estimated production over 15 years. For systems energized on or after June 1, 2026, this is no longer a single upfront lump sum: you receive 50% of the total value in year one, with the remaining 50% split into quarterly payments across years two through seven. Your Approved Vendor calculates the expected SREC quantity using your system's size, orientation, and shading, then that quantity is valued at the current Adjustable Block price, which steps down as each pricing block fills.

Yes, for new systems. As of January 1, 2025, Illinois moved to a supply-only net metering model for new installations, which credits exported power against supply charges only rather than the full retail bill including delivery and transmission charges. Homeowners with ComEd, Ameren, or MidAmerican service whose systems were interconnected and operational before January 1, 2025 remain grandfathered into full retail net metering for the life of their system.

Not always. Illinois excludes the added value of a qualifying solar installation from property tax assessment, but in many counties you need to file a specific form, such as PTAX-330 or PTAX-340 depending on your county, with your township assessor in the year your system is placed in service. Your installer often provides this paperwork, but confirm it's actually filed rather than assuming the exemption applies without any action on your part.

Related tools

Keep checking your incentives

SREC value estimator Property tax exemption savings Low income program eligibility Federal ITC calculator Indiana incentive estimator Wisconsin incentive estimator Missouri incentive estimator All rebates and incentives tools