Solar Answers → Buying & Financing
Why Is My Solar Loan Bigger Than the Cash Price? Illinois Dealer Fees, Explained
If your solar loan's principal is higher than the cash price you were quoted, the gap is almost always a "dealer fee" — a markup your lender pays your installer, then bakes into your loan. The CFPB found these fees typically run 10–30% of the cash price, sometimes more than 50%, and they usually don't show up in your APR. It's worth a question, not a panic — enter your own numbers below, or have our team check your actual offer, free.
Independent public sources we cite and link — The Day Company is not affiliated with or endorsed by any of them.
What is a solar dealer fee?
A dealer fee is a markup your lender pays your installer for the right to offer you financing — then adds to your loan's principal, on top of the actual cash price of your system. It goes by other names too: "program fee," "finance fee," "platform fee," "original issue discount." Whatever it's called, it's the same mechanic — a cost added to what you're borrowing, separate from what the system actually costs. National marketplaces that get paid whether or not your numbers add up don't always walk you through this; a page that's trying to earn a real conversation with you should.
Why is my loan principal higher than the cash price I was quoted?
In its August 2024 Issue Spotlight on solar financing, the Consumer Financial Protection Bureau (CFPB) laid out exactly how this works with a plain worked example: a system that would cost $30,000 in cash, with a $9,000 hidden fee — 30% of the cash price — baked into the loan instead. The loan documents show a principal of $39,000 plus interest. The lender sends the installer the $30,000 cash price and keeps the $9,000 fee.
Here's that same example laid out as a table, so you can compare it line by line against your own paperwork:
| Line item | Amount |
|---|---|
| Cash price (system without financing) | $30,000 |
| Dealer fee added (30% of cash price) | $9,000 |
| Loan principal you actually sign for | $39,000 |
| Who receives the cash price | Installer ($30,000) |
| Who keeps the dealer fee | Lender ($9,000) |
| Is the fee shown in your APR? | No |
Illustrative — the CFPB's own published example, not a quote or an estimate of your system.
Why didn't the dealer fee show up in my APR?
Because the fee is added to the loan's principal rather than counted as a finance charge, it doesn't have to appear in the Annual Percentage Rate the way interest does. The CFPB's own press release on this report states it plainly: lenders "frequently bake these fees into a loan's principal without including them in the stated annual percentage rate (APR)." That's how a loan can advertise a very low APR and still cost you thousands more than the cash price.
The CFPB's public complaint database has real examples of exactly this confusion. In one complaint on file (Complaint ID 5893841), a consumer reported being told "the interest rate was 1.99%, and that the APR interest rate was also 1.99% for a 25 year loan" — while the lender was separately "charging a 26% upfront fee...called the dealer fee." A low headline rate and a large hidden fee aren't contradictory numbers; they're two separate parts of the same loan.
How big are solar dealer fees, and what's mine?
Nationally, the CFPB found dealer fees "typically range from between 10 to 30 percent of the cash price but can exceed 50 percent." There's no official cap, and Illinois doesn't publish its own statewide figure — so the honest comparison is against the national range regulators have actually documented. The math behind it is simple: dealer fee = loan principal − cash price, and fee percentage = dealer fee ÷ cash price × 100. Use the calculator below with your own two numbers to see where your loan falls.
| Dealer fee as % of cash price | What the CFPB found |
|---|---|
| Under 10% | Below the typical range regulators observed |
| 10% – 30% | "Hidden fees typically range from between 10 to 30 percent of the cash price" |
| Over 30% | Above typical — the CFPB notes fees "can exceed 50 percent" |
Dealer-Fee Reveal: check your own numbers
Two numbers from your own paperwork are all this takes. Nothing you enter here is saved or sent anywhere unless you choose to continue.
Optional: estimate the extra interest, too
A gap here isn't proof of anything wrong on its own — it's worth a question. Figures you enter are compared only to the CFPB's published national ranges above; this isn't a loan calculation, quote, or promise of savings.
Does Illinois regulate solar dealer fees?
Not with a fee-specific law. Illinois Shines, the state's main solar incentive program, is direct about this: it "does not limit prices or fees" that a seller or vendor may charge you, and its standard Disclosure Form doesn't require your installer to break out the cash price separately from the financed amount. There's no Illinois statute capping solar dealer fees, and no official statewide statistic on how large they typically run here — the documented data is national, and we won't pretend otherwise.
What does exist: the Illinois Power Agency's own homeowner handout on solar loan financing has a section titled "Hidden Markup Fees," warning that "hidden fees may be used to make the interest rate on your loan look artificially low, but you could end up paying more overall." And undisclosed fees can still be challenged under Illinois' general Consumer Fraud and Deceptive Business Practices Act (815 ILCS 505/2). State attorneys general elsewhere — Minnesota and New York among them — have already taken action against lenders over undisclosed solar dealer fees, so this isn't a hypothetical concern regulators have overlooked.
Did the 2026 end of the federal tax credit change any of this?
The federal residential solar tax credit (Section 25D) expired for systems placed in service after December 31, 2025 — so 2026 cash and loan purchases get no federal credit. The dealer-fee mechanic itself hasn't changed. But the CFPB specifically documented that lenders often used "net cost after the tax credit" math to present figures that blurred the line between the cash price and the loan principal. With that credit gone for 2026 buyers, there's one less place for a fee to hide inside confusing math — a smaller smokescreen, not a smaller fee. If you're weighing a loan against a lease or PPA instead, see our full breakdown of lease vs. PPA vs. buying in Illinois — that page covers which structure fits your situation; this one is about the fee hiding inside a financed deal specifically.
What should I do if I think my loan has a dealer fee?
Start calm — a fee existing isn't the same as a fee being hidden from you, and asking about it is a normal, reasonable step, not a confrontation.
- Get the cash price in writing. Ask your installer directly what the system costs without financing — a legitimate offer can answer this in one sentence.
- Compare it to your loan principal. The difference is your implied dealer fee. Run it through the calculator above.
- Ask where the fee is disclosed. A straightforward lender can show you, not just tell you.
- Get a second read before you sign anything final. Our full guide to vetting an Illinois solar quote covers the rest of what a fair quote should include, beyond just the financing math.
- Know your cancellation rights. Illinois gives you 3 business days to cancel a contract signed at your home under 815 ILCS 505/2B — but that clock is short, so don't wait to ask questions.
None of this requires an adversarial conversation with your installer or lender. It requires two numbers and a straight answer. If you'd rather have someone else run the numbers first, that's what we're for.
Solar Dealer Fees FAQ
What is a dealer fee on a solar loan?
A markup a lender charges your installer for offering financing, then adds into your loan principal. The CFPB says it typically runs 10–30% of the cash price and can exceed 50%, and it usually isn't reflected in your APR.
Why is my solar loan higher than the price I was quoted?
Most commonly, a dealer fee added on top of the cash price. In the CFPB's own example, a $30,000 cash-price system became a $39,000 loan because of a $9,000 fee.
Is a dealer fee illegal?
Not by itself. Regulators focus on whether it's clearly disclosed. An undisclosed fee can raise issues under the federal Truth in Lending Act and Illinois' Consumer Fraud and Deceptive Business Practices Act.
Why isn't the dealer fee in my APR?
It's built into the loan principal rather than counted as a finance charge — which is why a very low advertised APR can still hide thousands of dollars in added cost.
How do I find out if my loan has a dealer fee?
Ask your installer for the cash price in writing, then subtract it from your loan principal. The difference is your implied dealer fee — use the calculator on this page to check it against the CFPB's published ranges.
What's a "normal" dealer fee?
There's no official cap. The CFPB found 10–30% typical nationally, sometimes higher. There's no Illinois-specific figure — whatever you find is worth asking about, not assuming is fine or unfair on its own.
Does Illinois cap solar dealer fees?
No. Illinois has no dealer-fee-specific statute, and Illinois Shines states plainly that it "does not limit prices or fees." The Illinois Power Agency's own homeowner handout does warn about "hidden markup fees," though.
Did the tax credit ending in 2026 change dealer fees?
The mechanic is unchanged, but with the federal residential credit gone for 2026 purchases, there's no tax-credit math left to blur the gap between cash price and loan principal — so a fee can be easier to spot than it used to be.
Can I negotiate or remove a dealer fee?
Sometimes. Paying cash, or financing through an outside lender such as a credit union rather than an installer-arranged loan, can avoid a solar-specific dealer fee entirely. Comparing more than one offer is standard advice from both the CFPB and Illinois Shines.
Should I just cancel my contract?
Not necessarily — a fee gap by itself isn't grounds for panic. Have the numbers reviewed first. If you signed at home in Illinois, you have 3 business days to cancel under 815 ILCS 505/2B, but that window is short, so don't wait to ask.
Who do I complain to in Illinois?
The Illinois Attorney General's Consumer Protection Division handles deceptive-practice complaints, and Illinois Shines has its own complaint channel for Approved Vendor conduct.
Will you tell me if my fee is too high?
We'll review your actual cash price and loan principal with you for free and show you exactly where your numbers land against the CFPB's published ranges — no obligation, and no installer sales pitch attached to the review itself.
Related answers
We'll check YOUR specific offer for hidden fees.
You did the smart thing by asking. Send us the cash price and the loan principal from your offer, and a real person on our Illinois team will show you exactly what your dealer fee is — and how it compares to what federal regulators say is typical. Free, no obligation, no pressure.
Free review · ComEd & Ameren · No obligationThe Day Company is an Illinois solar lead-generation resource, not a lender or installer — which is exactly why we have no fee of our own to defend. Information you submit may be used by our review team and authorized partners to contact you about your request. Checking eligibility creates no obligation.
Sources
- CFPB — Issue Spotlight: Solar Financing (August 2024)
- CFPB Newsroom — Report on Solar Loan Markup Fees (August 7, 2024)
- U.S. Department of the Treasury — Consumer Advisory on Solar Financing (August 7, 2024)
- Illinois Power Agency / Illinois Shines — Solar Loan Financing Homeowner Handout
- Illinois Consumer Fraud and Deceptive Business Practices Act, 815 ILCS 505/2 (ilga.gov)
- 815 ILCS 505/2B — Home Solicitation Sales, 3-Day Cancellation Right (ilga.gov)
Changelog: August 6, 2026 — v1 published.
How to cite: The Day Company Editorial Team, "Why Is My Solar Loan Bigger Than the Cash Price? Illinois Dealer Fees, Explained," The Day Company, updated August 6, 2026. https://theday.company/answers/solar-dealer-fees-illinois