CheckMyTax — Stop Overpaying Property Taxes
Cook County homeowners — 2026 appeal deadlines are closing

Your county thinks your home is worth more than it is.

Find out if you're overpaying in 60 seconds — free. If you are, get your complete appeal report for $99. No attorney. No percentage cut. Keep 100% of your savings.

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Data, not advice

We analyze public Cook County records. We are not a law firm and provide no legal advice.

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You file. You keep everything.

We arm you with the evidence. The appeal is yours to submit — and so are 100% of your savings.

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No results guaranteed

Appeals vary by property. If we cannot find 3 strong comps, you get a full refund automatically.

Built with public data from
COOK COUNTY ASSESSORIL DEPT OF REVENUEPTAB
273,907
Appeals filed in Cook County 2024 — an all-time record
$500–$1,500/yr
Common annual savings from a successful appeal
3 Years
A successful appeal locks in savings across Cook County's triennial cycle
<5%
Of homeowners ever appeal — despite 30-60% being overassessed
How It Works
Three steps. No lawyers.
No percentages. No catch.

File a professional appeal in less time than it takes to order lunch.

Step 1
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Check for free

Enter your address. We pull your current assessed value and instantly compare it to similar homes nearby. You see your estimated overpayment — no signup, no card.

Step 2
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Get your evidence

For $99, get your complete appeal report emailed directly to you: 5 7-factor matched comps, a personalized cover letter, and a county-specific step-by-step filing guide.

Step 3
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File and save

Submit through your county's free portal — takes 15 minutes. Keep 100% of your savings. No percentage cut. No recurring fees. Your money stays yours.

What's Included
Everything you need
to file a winning appeal.

What attorneys charge $300+ for — or take 25-35% of your savings — you get for $99 flat.

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5 7-Factor Matched Comparable Properties

Properties matched on size, age, condition, and proximity. Each comp has a lower assessed value than yours — that's your evidence.

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Precision-Drafted Cover Letter

A custom argument written for your specific property and comps. Not a template — a real case for why your assessment is too high.

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Step-by-Step Filing Guide

County-specific instructions showing exactly how to submit your appeal through your county's free online portal. Takes about 15 minutes.

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Delivered to Your Inbox

Your full report is emailed as a ready-to-file report. Everything in one place — comps, cover letter, and filing instructions.

Sample Report
See exactly what you get

This is the first page of a real appeal report. Your report will be built from your actual property data, your actual comps, and your actual county.

Property Tax Appeal Report

Report #CMT-2026-00847Generated April 18, 2026

Subject Property

Address
1423 N Maple Ave, Oak Park, IL 60302
PIN
16-05-312-045-0000
Current Assessed Value
$487,200
Estimated Market Value
$421,000
Overassessment
$66,200 (13.6%)

Comparable Properties

AddressSq FtYearAssessed$/SqFt
1423 N Maple Ave2,1101924$487,200$231
1435 N Maple Ave2,1401924$398,400$186
1502 N Humphrey Ave2,0801921$402,100$193
1358 N Taylor Ave2,2151926$411,500$186
1476 N Elmwood Ave2,0901923$395,200$189
1389 N Grove Ave2,1651925$404,800$187

Cover Letter Excerpt

To: Cook County Assessor's Office. I am submitting this appeal on the grounds that my property at 1423 N Maple Ave has been assessed at a value materially higher than comparable properties in the same neighborhood. Five properties within a four-block radius, matched on square footage, year built, and construction type, carry an average assessed value of $402,400 — $84,800 below my current assessment of $487,200.

Based on this comparative analysis, I respectfully request that my assessment be adjusted to reflect the prevailing values in my area…

Sample report shown. Your actual report will use your address, your comps, and your county's filing procedures.

Pricing
One flat fee. Zero percentages.
Keep every dollar you save.

Attorneys charge 30% of your savings every year. We charge $99 once.

Appeal Report
Everything to file a winning appeal
$99 one-time
  • 5 7-factor matched comparable properties
  • Precision-drafted cover letter
  • County-specific step-by-step filing guide
  • Delivered to your inbox as a ready-to-file report
  • Guarantee: 3+ comps or your money back
TaxWatch
Annual monitoring & deadline alerts
Coming Soon

Deadline alerts, annual comp refresh, assessment monitoring, and exemption re-check. On the roadmap for 2026.

Compare
See exactly what you save.
DIY
$0
CheckMyTax
$99
Attorney
30%
7-factor matched comps
Ready-to-file evidence
Step-by-step filing guide
Keep 100% of savings✗ (70%)
Time investment15-40 hours15 minutes0 min
Cost on $1,000/yr savings$0$99 once$360/yr
3-year total cost$0$99$1,080

⏳ Miss this window and you overpay for 3 more years.

Cook County's triennial reassessment locks your rate until 2029. On $1,000 per year in overpayment, that is $3,000 you will never get back. Cook County South District townships are open NOW.

Check My Property Free →
FAQ
Straight answers. No fine print.
How does the free check work?
Enter your address. We pull your assessed value from public records and compare it to similar properties nearby. You instantly see how much you may be overpaying. No signup, no card, no catch.
Do you file the appeal for me?
No. Illinois law requires you file your own appeal or hire a licensed attorney. We provide the evidence, cover letter, and step-by-step filing instructions. You file through your county's free online portal in about 15 minutes.
What if my appeal doesn't work?
Appeal outcomes depend on your county's review process and are not guaranteed. However, homeowners who appeal with organized evidence win 40-60% of the time. At $99, even a $300 annual reduction pays for itself in year one — and saves $900+ over 3 years.
Do you offer a guarantee?
Yes. If our report can't identify at least 3 comparable properties with lower assessed values than yours, you get a full $99 refund. We guarantee the quality of the evidence — appeal outcomes depend on your county's review process.
Can my taxes go UP if I appeal?
In Cook County, the Assessor does not raise your assessment if you file an appeal at the Assessor level — the outcome is either a reduction or no change. If you continue your appeal to the Cook County Board of Review or to the Illinois Property Tax Appeal Board, those bodies can adjust your assessment up or down based on their own review, though increases are uncommon. In other Illinois counties, rules vary by jurisdiction. The appeal kit you receive includes the full disclosure.
Why not just hire an attorney?
For residential homes, attorneys charge 25-40% of your savings every year. On $1,000 annual savings, that's $250-400/year — and it repeats every year the reduction holds. CheckMyTax costs $99 once. You keep everything.
What counties do you cover?
Currently Cook County, Illinois. DuPage, Will, Lake, and Kane counties coming soon.
Stop Overpaying

Every year you don't appeal, the county keeps your money.

One check. 60 seconds. Free. If you're overpaying, we'll show you how to fix it for $99.