Check your assessment
Run the free estimator. If the county's number implies a market value above what your home would actually sell for, you likely have a case — and an idea of what it's worth per year.
Illinois Property Tax Appeal Helper
Your home may be assessed too high. Find out — and appeal it.
Illinois homeowners pay some of the highest property taxes in the country, and assessments are wrong more often than you'd think. TaxBeacon Illinois checks whether your home is over-assessed, then builds the appeal for you.
One-time fee. No percentage of your savings, no annual subscription.
$49one-time, flat — that's the whole price
Freesavings estimator before you pay anything
All Illinoisbuilt for Illinois counties & deadlines
Start with the free estimator
Enter what your county says your home is worth and what you believe it's actually worth. The estimator does the math Illinois assessors use and shows what a successful appeal could save you each year.
Estimated annual savings
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Fill in the form and press “Estimate my savings” to see your numbers.
How the appeal helper works
An appeal sounds like paperwork and hearings. Broken into steps, it's mostly finding the right evidence and filing it on time — which is exactly what the plan organizes for you.
Get your personalized plan
The full plan turns your numbers into a filing-ready appeal: the grounds to argue, the evidence to gather, comparable homes to cite, and your county's exact steps and deadline.
File — and keep the savings
File with your county following the plan's checklist. A successful appeal lowers your assessed value, and that lower value carries into future tax bills until the next reassessment.
What the Full Appeal Plan includes
Everything is built around your property and your county — not a generic template.
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Your savings breakdownThe estimator's math, in full: the county's implied value, your target value, and the yearly savings at stake.
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Grounds for your appealWhether to argue over-valuation, lack of uniformity with similar homes, or errors in your property record — and which fits your numbers.
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Comparable-homes worksheetA structured way to document similar nearby homes assessed lower than yours — the evidence assessors and review boards actually weigh.
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Your county's steps and deadlineWhere to file, what forms your county uses, and the filing window you can't afford to miss.
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Ready-to-copy appeal summaryA written summary of your case you can paste into your filing or bring to a hearing.
Not sure yet? The estimator above is free, with no sign-up. Run your numbers first — the plan only makes sense if the savings do.
Who should appeal?
You don't need a lawyer or a tax firm that takes a third of your savings. You need a reason the county accepts — one of these usually does it.
Your assessment jumped
A reassessment year pushed your value up sharply, but homes like yours aren't actually selling for that much more.
Similar homes are assessed lower
Neighbors with comparable houses carry lower assessed values. Illinois law expects uniformity — that's appeal grounds on its own.
Your property record has errors
Wrong square footage, an extra bathroom that doesn't exist, a finished basement you never finished — errors inflate your value every year until they're fixed.
Questions, answered
How much does it cost?
The estimator is free. The Full Appeal Plan is a one-time $49 — no subscription, and unlike many appeal firms, we never take a percentage of your savings.
Can appealing raise my taxes?
An appeal asks the county to correct your assessed value to match your home's actual market value. It's a request for a reduction — but nothing is guaranteed, and the result depends on the evidence. That's why the plan starts with whether your numbers support a case at all.
When can I appeal?
Each Illinois county opens a filing window after assessments are published, and missing it usually means waiting for the next cycle. Cook County opens windows township by township. Your plan names your county's window so you don't miss it.
Is this legal or tax advice?
No. TaxBeacon Illinois provides educational tools and organizes your appeal — it isn't a law firm, appraisal service, or tax preparer, and using it doesn't create an attorney–client relationship. For complex properties or disputes, a licensed Illinois attorney or appraiser is the right call.
What happens after I pay?
Payment is handled by Stripe. Checkout is currently running in test mode while we finish setting up live payments, so no real charge goes through yet — the full checkout flow is in place and ready.
Also from TaxBeacon Illinois
The appeal helper is our first product. Two more Illinois-focused tools round out the set.
Illinois Business Setup Checklist
A guided, step-by-step checklist for starting a business in Illinois — entity choice, Secretary of State filing, EIN, state tax registration, and licenses, with the official fees and links at each step.
Signing Agent Toolkit
Scheduling, invoicing, and client tracking built for Illinois loan signing agents — appointments, mileage, fees, and payment status in one place.
Every year you don't appeal, you pay the county's number.
Run the free estimator. If the county has your home valued too high, get the plan and file the appeal — for less than one month of the overcharge.
Buy the Full Appeal Plan — $49Checkout is currently in Stripe test mode — no real payment is charged yet.