Illinois Solar Incentives 2026: Illinois Shines, SRECs, Net Metering

Illinois solar incentives in 2026: Illinois Shines pays about $70–$81 per renewable energy credit (REC) for 15 years of expected output — roughly $10,000–$12,000 on an 8 kW system, plus $20/REC more if you own it; ComEd and Ameren pay a one-time smart-inverter rebate of at least $300 per kW; and income-qualified households can use Illinois Solar for All with no upfront cost.

What Illinois does not have in 2026: full retail net metering for new systems, a state solar tax credit, or a sales tax exemption. The 30% federal residential credit is also gone for installs completed after December 31, 2025.

Illinois is unusual. The state pays more incentive money per system than almost anywhere else, and at the same time it credits your exported power at a lower rate than it did two years ago. Both facts shape a 2026 quote, and a proposal that gets one of them wrong is usually wrong in your favor on paper and against you in real life. Here is what each program is worth, who receives the money, and the five lines to check before you sign.

Illinois solar incentives 2026 at a glance

"Group B" in program documents means ComEd territory (plus co-ops and municipal utilities in the PJM region); "Group A" means Ameren Illinois, MidAmerican, Mt. Carmel, and the co-ops and municipal utilities in MISO (the Midcontinent grid region covering central and southern Illinois). Ask which group your address is in — it changes the REC price.

What is Illinois Shines and how much is an Illinois SREC worth in 2026?

Illinois Shines is the state's Adjustable Block Program, run by the Illinois Power Agency (IPA). One of the state's large utilities buys the renewable energy credits (RECs — what most other states call SRECs) your system is expected to produce over 15 years, under a contract with a state-registered Approved Vendor — usually your installer or its financing partner. One REC is one megawatt-hour. The price is fixed for the program year in which the application is submitted, and a project cannot withdraw and resubmit to catch a higher price.

For Program Year 2026-27, which opened June 1, 2026, the IPA's published Distributed Generation (DG — the program's term for rooftop-scale systems) prices are:

The program's payment formula is inverter size (MW AC) × approved capacity factor × 8,760 hours × 15 years × the REC price. In plain terms, it is 15 years of expected production, priced today. A typical 8 kW DC home system in northern Illinois produces around 9,600 kWh a year, so:

• Over 15 years that is roughly 144 MWh, or about 144 RECs.
• In ComEd territory at $80.77, that is about $11,600. In Ameren territory at $70.37, about $10,100.
• Your actual figure comes from the capacity factor the program approves for your address and roof (a PVWatts-style estimate), so treat these as ballpark. The IPA publishes a REC payment calculator on the Illinois Shines site if you want to check a quote.

What is the Illinois Shines $20 customer-owned adder?

Because the federal residential credit ended, the IPA added a $20 per REC adder for customer-owned Small DG projects in the 2026-27 program year. To qualify, you must own the system — not a lease, not a power purchase agreement (PPA). The Approved Vendor must show the contract is for ownership and attest that the project "has not received or will not receive an ITC or residential clean energy tax credit" (ITC is the federal investment tax credit). The adder must be disclosed on your Disclosure Form. On the 8 kW example it adds about $2,900, taking the ComEd figure to roughly $14,500 and the Ameren figure to roughly $13,000.

When is the Illinois Shines money paid — and who receives it?

This is the line most Illinois quotes blur. Under the 2026 15-year REC contract, the utility pays the Approved Vendor 50% at energization and the remainder in equal installments over the following six years. (Earlier contract years paid Small DG 100% upfront — if a rep quotes "the state pays it all at once," they are describing the old contract.) The program does not pay you; it pays the vendor, and what reaches you is set by your own contract.

Illinois requires the Approved Vendor to give you a standardized Disclosure Form before you sign, and it lists the project's costs, fees, size and expected generation; the standard form includes the estimated Illinois Shines REC value and how the vendor applies it (the customer-owned adder, if claimed, must appear on it). In practice there are three shapes:

• Price reduction. The vendor discounts the system price by some or all of the expected REC value and keeps the utility payments. Check that the discount is close to the full REC amount, not a fraction of it.
• Pass-through. You pay full price and the vendor forwards the REC payments as they arrive — meaning half after energization and the rest over six years. Confirm the schedule in writing and what happens if the vendor goes out of business.
• Lease or PPA. The provider owns the system and keeps the RECs; the value is supposed to be reflected in your rate, so check that rate and its annual escalator against an ownership quote. There is no customer-owned adder on a lease.

Whatever the shape, the dollar figures in your contract must match the Disclosure Form — the program requires the two to be consistent, and the vendor attests to that when it applies. If a proposal shows "Illinois SREC income" as an annual line for 15 years, it is misrepresenting how the program pays.

How does net metering work in Illinois after the 2025 change?

Under the Climate and Equitable Jobs Act (CEJA, Public Act 102-0662) and the state net metering statute (220 ILCS 5/16-107.5), residential and small commercial customers in ComEd, Ameren, and MidAmerican territory whose systems began net metering on or after January 1, 2025 receive supply-only net metering. Your utility still nets exported kWh against imported kWh, but the credit only covers the supply (and transmission) portion of your bill. Delivery charges are billed on every kWh you pull from the grid, regardless of how much you send back.

The IPA's own example: you export 400 kWh and import 500 kWh in a month. You pay supply and transmission on the net 100 kWh, but delivery on the full 500 kWh. Under the old full-retail rule, delivery would have been netted too. Two things follow for a 2026 quote:

• The savings model must credit exports at the supply rate — find the supply charge line on your bill (ComEd calls it "Electricity Supply Charge") — not at your all-in cents-per-kWh. A proposal built on full retail net metering overstates savings every month of the contract.
• Self-consumption matters more than it used to. Power you use as it is generated avoids the whole bill rate; power you export earns only the supply credit. That is the real argument for a battery in Illinois now, and it should be made with numbers, not with "you'll lose your credits otherwise."

Systems already on full retail net metering before 2025 keep it for the life of the system unless they are modified enough to need a new interconnection agreement (ComEd) or more than double in size (Ameren). If you are buying a house with an older system, that grandfathered status transfers with it.

What is the ComEd / Ameren $300 per kW solar rebate?

Separate from Illinois Shines, ComEd and Ameren pay a one-time distributed generation rebate of at least $300 per kilowatt of DC nameplate capacity to residential and small-commercial customers (anyone who would have qualified for net metering) whose systems use a smart inverter meeting IEEE 1547-2018 (220 ILCS 5/16-107.6). A paired battery earns a further $300 per kilowatt-hour of storage capacity, on the condition — in the statute, and in the utility tariffs to date — that it enrolls in a peak-time rebate, hourly pricing, or time-of-use program; confirm the current requirement with the utility. The statute sets a floor: before December 31, 2029 the base rebate cannot be lower than $300/kW (after that, $250/kW), and the ICC can set it higher.

On an 8 kW DC system that is a $2,400 check; with a 13.5 kWh battery it is another $4,050. Before 2025, taking this rebate meant giving up full retail net metering, which is why older advice says to think twice. For anyone installing in 2026 there is nothing to give up — new systems are on supply-only net metering either way — so the rebate should be in every ComEd and Ameren quote. Confirm in writing that the inverter meets the IEEE 1547-2018 smart-inverter standard the statute requires, and ask who files the rebate application.

What is Illinois Solar for All?

Illinois Solar for All (ILSFA) is the income-qualified track, for households at or below 80% of area median income. For 1–4 unit homes there is no upfront cost, and the program rule is that your ongoing costs and fees can be no more than half the value of the electricity the system produces. It runs through vendors that hold a separate Illinois Solar for All approval (an Illinois Shines registration is a prerequisite), with its own consumer protections and income verification. Funding is allocated per program year and can run short, so ask the vendor whether ILSFA capacity is currently available before you are steered toward a standard lease instead. Details and the eligibility lookup are at illinoissfa.com.

Does Illinois have a state solar tax credit or sales tax exemption?

No to both. Illinois has no state income tax credit for solar and no sales tax exemption on solar equipment. What it does have is a property tax special assessment (Property Tax Code, 35 ILCS 200/10-5 to 10-25). An owner can file with the county assessor to have the improvements valued as though they had a conventional heating or cooling system instead of solar, so the panels do not raise the assessment. You file for it; it is not automatic, and county practice varies, so confirm with your assessor's office. If a quote lists an "Illinois solar tax credit," ask what statute it is under — there is not one.

What happened to the federal solar tax credit in Illinois?

The 30% federal residential credit under Section 25D ended for systems whose installation was completed after December 31, 2025 — for every homeowner-owned system, whether you pay cash, finance it, or hold it in some other structure you own. One piece survives: if your installation was completed in 2025 and the credit was larger than your tax bill, the unused amount still carries forward under §25D(c). Ask your CPA how that applies to you. An Illinois quote dated 2026 that subtracts 30% from the price of a system you will own is wrong — here is what a 30% line tells you about the rep. The $20 customer-owned adder exists precisely because that credit is gone, and the vendor has to attest you are not receiving it. A third-party owner may be able to claim the commercial credit (§48E), subject to the construction-start and foreign-entity rules that changed in 2025 — and whether that credit is even available on a residential roof is unresolved, which makes it the provider's problem, not something a rep should assert to you. Either way it is the provider's credit, not yours: nothing goes on your tax return, and any value reaches you only through the monthly payment you are quoted — a price the provider sets, and whether it stays a saving depends on the escalator over the term.

Before you sign: 5 incentive lines to check in an Illinois solar quote

1. REC price and group. $80.77 (ComEd) or $70.37 (Ameren) per REC for a 0–10 kW AC system in Program Year 2026-27, plus $20 if you are buying and taking no federal credit. The Disclosure Form must show it.
2. How the REC value reaches you. Price reduction, pass-through (50% after energization, rest over six years), or baked into a lease rate — and whether the contract number matches the Disclosure Form.
3. Net metering rate. Exports credited at the supply rate only. Any model using your full retail rate is overstating savings.
4. The utility rebate. At least $300/kW, present in every ComEd and Ameren quote for a smart-inverter system; $300/kWh more for a battery.
5. No 30% federal line and no "Illinois state tax credit" on a quote for a system you will own. Neither exists in 2026.

Illinois solar incentive FAQ

Is Illinois Shines the same as SRECs?

Functionally yes — Illinois calls them RECs and buys 15 years of them under one contract at a fixed price, rather than paying a floating market price each year as some East Coast states do. That is why the money arrives as one contract — half at energization and the rest within six years — instead of as an annual check for 15 years.

Can the Illinois Shines block run out?

Yes. Each program year opens a fixed amount of Small DG capacity (236.71 MW for 2026-27). If it fills, later applications go on a waitlist and receive the price of the block they are eventually assigned to. Ask the vendor whether your project has been submitted and to which block.

Does a leased system get the Illinois Shines payment?

The REC contract still exists, but the provider is the owner and keeps the payment; the customer-owned adder does not apply. The value should show up as a lower lease or PPA rate — compare it against an ownership quote that includes the REC money and the rebate before deciding. Our lease vs. loan vs. cash comparison walks through the arithmetic.

Get your Illinois solar quote checked, free

If you have an Illinois proposal in hand, send it over and we will check the REC price and payment structure, the net metering assumption, the utility rebate, and the federal line against the current program rules — the review takes about 15 minutes and costs you nothing. Start a free quote review, or read how the review works first. Solarfying is an independent solar broker; if you go ahead with an installer we introduce, that installer may pay us a referral fee. Homeowners never pay for the review.

Program figures are from the Illinois Power Agency's Final 2026-27 REC Prices (applicable from June 1, 2026), the Illinois Shines 2026-27 Program Guidebook (payment schedule, Section 8), the Illinois Shines Program Year 2026-27 announcement (block capacity), the IPA's FAQs on the 2025 net metering changes, 220 ILCS 5/16-107.5 and 16-107.6, 35 ILCS 200/10-5 et seq., and the Illinois Solar for All program rules (illinoissfa.com). REC prices, block capacity, and utility tariffs change; confirm current terms with your Approved Vendor's Disclosure Form, your utility, and a tax professional before relying on them. This article is general information, not tax advice.