Cook County, Illinois • Homeowner / homestead exemption guide • Reviewed September 8, 2026
Illinois Cook County IL Homestead Exemption: Rules, Savings, Filing Steps, Deadlines and Local Contacts
This guide is for the Cook County, Illinois Homeowner Exemption, often searched as the Cook County homestead exemption.
The exemption lowers a home’s Equalized Assessed Value, also called EAV. It is not a direct dollar-for-dollar discount from the tax bill.
The filing office is the Cook County Assessor’s Office, led by Assessor Fritz Kaegi.
For tax year 2025 applications, the Cook County Assessor listed May 15, 2026 as the main exemption application deadline. Applications after that date are handled through the Certificate of Error process.
Fast answer
Cook County Homestead Exemption Quick Facts
Cook County commonly uses “Homeowner Exemption” for the general residence homestead benefit.
The Assessor processes homeowner, senior, disability, veteran and certificate-of-error exemption filings.
The Homeowner Exemption reduces Equalized Assessed Value, not the tax bill directly.
The Senior Exemption is for qualifying homeowners age 65 or older.
The Persons with Disabilities Exemption provides an annual EAV reduction.
Late filings are processed as Certificates of Error after the main deadline.
Cook County second-installment bills show exemptions and final tax rates.
Use the Property Tax Portal or Assessor search if you do not know your PIN.
Exemption or assessed value issue → Cook County Assessor. Second-installment tax bill or payment issue → Cook County Treasurer. Tax rate, PIN map or older delinquent-tax issue → Cook County Clerk. Second-level appeal issue → Cook County Board of Review.
Local contacts
Cook County Offices, Addresses, Phone Numbers and Roles
Cook County Assessor’s Office
Best for: Homeowner Exemption, Senior Exemption, Senior Freeze, Persons with Disabilities, veteran exemptions, missing exemptions, assessments and first-level appeals.
Assessor: Fritz Kaegi
Downtown office: 118 N. Clark Street, Room 320, Chicago, IL 60602
Phone: 312-443-7550
Hours: Monday–Friday, 8:30 AM–5:00 PM
Open Cook County AssessorAfter opening: use Exemptions, Search by Address, Enter 14-digit PIN, Appeals, Certificates of Error or Office Locations. Schedule an appointment before visiting when possible.
Cook County Treasurer
Best for: tax bills, payment status, online payments, refund checks, overpayments, duplicate bills and senior tax deferral.
Treasurer: Maria Pappas
Office: 118 N. Clark Street, Room 112, Chicago, IL 60602
Phone: 312-443-5100
Open Cook County TreasurerAfter opening: search by PIN or address, download the tax bill, check exemptions on the second installment bill, pay online or search for refunds.
Cook County Clerk
Best for: tax rates, PINs, tax codes, tax maps, recordings, deeds, liens and Clerk property-tax services.
County Clerk: Monica Gordon
Main office: 69 W. Washington Street, Chicago, IL 60602
Phone: 312-603-5656
Recordings: 118 N. Clark Street, Room 120, Chicago, IL 60602
Recordings phone: 312-603-5050
Open Cook County ClerkAfter opening: use Property Taxes, Tax Maps or Recordings when the issue is a PIN, rate, deed, lien, legal description or recorded document.
Cook County Board of Review
Best for: second-level assessment appeals after the Assessor’s review and township appeal windows.
Commissioners: George A. Cardenas, Samantha Steele and Larry R. Rogers, Jr.
Office: 118 N. Clark Street, Chicago, IL 60602
Phone: 312-603-5542
Hours: Monday–Friday, 9:00 AM–5:00 PM
Open Board of ReviewAfter opening: use the BOR portal, township dates and deadlines, decision history or residential appeal instructions. Exemption filings normally start with the Assessor.
Open Assessor branch office list
Downtown: 118 N. Clark Street, Room 320, Chicago, IL 60602 • 8:30 AM–5:00 PM
Markham: 16501 S. Kedzie Ave., Room 237, Markham, IL 60426 • 8:30 AM–4:30 PM
Skokie: 5600 W. Old Orchard Road, Room 149, Skokie, IL 60077 • 8:30 AM–4:30 PM
Bridgeview: 10200 S. 76th Avenue, Room 237, Bridgeview, IL 60455 • 8:30 AM–4:30 PM
Main phone for all listed Assessor offices: 312-443-7550
Open countywide policy contact
Cook County Board President: Toni Preckwinkle
Office of the President: 118 N. Clark Street, Room 537, Chicago, IL 60602
Phone: 312-603-6400
Use this office for countywide policy and budget questions, not for an individual exemption approval.
Open Board of CommissionersGoogle Map: Cook County Assessor Downtown Office
The main Assessor location is inside the Cook County Building at 118 N. Clark Street in downtown Chicago.
Bring your 14-digit PIN, photo ID, occupancy documents, deed or trust evidence, and any senior, disability or veteran proof.
If the issue is a tax bill payment, visit the Treasurer in Room 112 instead of the Assessor in Room 320.
Content gaps fixed
What Most Cook County Homestead Guides Miss
The exemption reduces EAV: the Homeowner Exemption is a $10,000 EAV reduction, not a $10,000 cash discount.
Exemptions show on the second installment: Cook County first installments are estimated bills; exemption savings normally appear on the second installment bill.
Taxes are paid in arrears: tax year 2025 exemption applications affect tax bills paid in 2026.
May 15 mattered for tax year 2025: applications after that deadline are processed as Certificates of Error.
Senior Freeze is not a full tax freeze: it freezes the EAV, but tax rates can change and the bill can still change.
Senior Freeze requires yearly action: it is not the same as the Senior Exemption, which generally auto-renews after approval.
Tax rates come from the Clerk: the Assessor does not set your tax rate or collect your bill.
Township timing matters: appeal windows and reassessment schedules vary by township and neighborhood.
Exemption types
Cook County Property Tax Exemptions Homeowners Should Check
For an eligible owner-occupied principal residence.
For qualifying homeowners age 65 or older.
For eligible senior homeowners who meet income and occupancy rules.
For qualifying homeowners with accepted disability proof.
For qualifying veterans returning from active duty in armed conflict.
For qualifying service-connected disabled veterans and some surviving spouses.
Cook County notes a newer category for qualifying World War II veterans.
Cook County mails applications to properties that meet the required assessment-increase tests.
Use this when an exemption should have applied to a prior or finalized bill.
Cook County Assessor exemptions overview
Use this official page to compare Homeowner, Senior, Senior Freeze, Persons with Disabilities, Returning Veterans, Veterans with Disabilities and Longtime Homeowner benefits.
Open Exemptions OverviewAfter opening: choose the exemption category, read eligibility and documents, then use the current tax-year application or Certificate of Error route if the main deadline has passed.
Qualification rules
Who Qualifies for the Cook County Homeowner Exemption?
You must own the residential property or have a lease, contract or qualifying interest that makes you responsible for the real estate taxes.
The home must be your primary place of residence for the tax year in question.
Cook County taxes are paid in arrears, so tax year 2025 exemptions appear on bills paid in 2026.
Do not claim a residence exemption on another property for the same period.
New Cook County homeowners
Buying a home in Chicago, Evanston, Cicero, Oak Park, Schaumburg, Skokie, Orland Park, Palatine or another Cook County community does not automatically make every exemption appear correctly.
Search your PIN, review the exemption history, and file if the Homeowner Exemption or other benefit is missing.
Co-ops, trusts and non-deed ownership
If you are not listed on a recorded deed, the Assessor may ask for a lease, contract for deed, trust agreement, stock certificate or occupancy agreement.
Cooperative apartment owners may need to provide cooperative-specific ownership and occupancy documents.
Before filing
Documents and Details to Prepare Before Applying
The PIN appears on tax bills, closing papers, deeds and Assessor notices.
The name and property address should match the exemption application when possible.
Use documents such as bank statement, internet bill, pay stub, Social Security award letter or voting record.
If you are not listed on the deed, prepare a lease, trust, contract for deed, stock certificate or occupancy agreement.
Senior applicants must show age, identity and occupancy.
Prepare total household income proof for the income year required by the application.
If accepted proof is not available, the Illinois PTAX-343-A physician statement may be needed.
Veteran categories require service-connected disability, discharge, return from active duty or survivor proof.
Find your PIN before filing
The Cook County Property Tax Portal lets you search by 14-digit PIN or property address.
Open PIN / Property SearchAfter opening: search by PIN if you have it. If using address search, enter house number, street and city; do not include street directions or abbreviations unless the tool accepts them.
Filing workflow
How to Apply for the Cook County Homeowner Exemption Online
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Confirm the home and tax year.
Cook County bills are paid in arrears. Make sure you are applying for the correct tax year and property.
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Find the 14-digit PIN.
Use the Property Tax Portal or Assessor search if you only know the address.
Open Property Tax PortalAfter opening: search by property address, copy the PIN, then review Tax Exemptions and Billed Amounts & Tax History.
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Open the official exemption filing page.
The Cook County Assessor’s filing page lets you apply for several exemption categories in one system.
Open Application for ExemptionsAfter opening: click Begin Filing, select Homeowner Exemption and any other eligible category, enter the PIN, answer occupancy questions, upload documents and submit.
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Add senior, disability or veteran benefits only if eligible.
Do not select special categories without the required age, income, disability, VA or military proof.
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Save submission proof.
Keep screenshots, confirmation emails, uploaded documents and the tax year selected in the application.
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Check the second-installment bill.
The exemption should be reviewed on the second-installment tax bill and in the property portal’s exemption history.
Use the official Cook County Assessor filing system or get help from the Assessor’s office, a branch office, a local township assessor or an official outreach event.
Deadline detail
Cook County Exemption Deadlines, Certificates of Error and 2026 Bill Timing
This was the main Cook County exemption deadline for bills paid in 2026.
Late or missing exemption filings move into correction/refund processing.
Exemptions and final tax rates are reflected on the second-installment bill.
Use Certificate of Error if a prior-year exemption was missing and the property was eligible.
Certificate of Error applications can take several weeks and may require further review.
Approved exemption refunds are paid through the Treasurer’s Office.
If the exemption is missing from the tax bill, do not only call the Treasurer.
First confirm whether the Assessor approved the exemption for the correct PIN and tax year.
Certificate of Error information
Use this official route when an exemption should have applied to a finalized or prior tax bill.
Open Certificates of ErrorAfter opening: choose the missing exemption type, select the tax year, prepare documents showing eligibility for that year, submit the filing and monitor Assessor approval before expecting a Treasurer refund.
Savings math
How Cook County Homestead Exemption Savings Are Calculated
For most residential Class 2 homes, Cook County starts from estimated fair market value and applies a 10% residential assessment level.
The state equalizer is then applied to create Equalized Assessed Value, or EAV.
Homestead exemptions reduce EAV. The adjusted EAV is then multiplied by the local tax rate.
Simple homeowner example
A $300,000 residential home at a 10% assessment level has a $30,000 assessed value before the equalizer.
If the state equalizer is 2.9237, the EAV example becomes $87,711 before exemptions.
A $10,000 Homeowner Exemption at an 8% local tax rate would illustrate about $800 in tax savings.
Open simple Cook County EAV calculator
Estimated assessed value: $30,000.00
Estimated EAV: $87,711.00
Exemption used: $10,000.00
Estimated savings: $800.00
Senior benefits
Cook County Senior Exemption and Senior Freeze
Cook County has two major senior benefits that are often confused.
The Senior Exemption reduces EAV by a fixed amount. The Senior Freeze can freeze EAV for eligible low-income seniors, but the tax bill can still change if tax rates change.
For tax year 2025, seniors born in 1960 or earlier were listed as eligible by age.
This reduces EAV and generally renews automatically after approval.
The Senior Freeze must be filed each year.
Cook County used 2024 household income for tax year 2025 Senior Freeze eligibility.
Illinois guidance lists a higher threshold for taxable year 2026, payable in 2027.
Senior tax deferral is separate from exemptions and may create a lien-like repayment obligation.
Senior Exemption page
Use this page for the fixed Cook County Senior Exemption.
Open Senior ExemptionAfter opening: check age eligibility, documents, automatic renewal information and the application or Certificate of Error route for the tax year you need.
Senior Freeze page
Use this page for the income-based Low-Income Senior Citizens Assessment Freeze Homestead Exemption.
Open Senior FreezeAfter opening: confirm the income year, total household income, ownership or tax-liability requirement, occupancy requirement and annual renewal steps.
Disability and veteran categories
Persons with Disabilities, Returning Veterans and Veterans with Disabilities
Cook County disability and veteran exemptions require specific proof.
Do not select a special category without matching the Assessor’s documentation rules for that tax year.
Requires disability proof and qualifying residence occupancy.
Cook County notes automatic renewal going forward for homeowners who received the disability exemption last year.
For qualifying return from active duty in armed conflict.
Benefit level depends on the VA-certified disability rating and statutory rules.
Higher-rated qualifying veterans may receive much larger relief, subject to statutory limits.
Certain un-remarried surviving spouses may continue or apply for qualifying veteran relief.
Persons with Disabilities Exemption
Use this official Assessor page for the $2,000 EAV disability exemption and required documentation.
Open Disability ExemptionAfter opening: review accepted disability proof, residency documents and whether automatic renewal applies to your prior-year approval.
Veterans with Disabilities Exemption
Use this official Assessor page to confirm VA-rating rules, EAV amounts, survivor rules and document requirements.
Open Veterans with Disabilities ExemptionAfter opening: check the disability-rating table, upload current VA proof, confirm the property is your primary residence and verify whether another exemption cannot be combined.
After filing
How to Check Cook County Exemption Status and Missing Exemptions
Use the Assessor’s status tool for the filing tax year.
Review Exemption History and Status on the Assessor property record.
Exemptions should show on the bill issued by the Treasurer.
If a prior or finalized bill is missing an eligible exemption, use the Assessor correction process.
Cook County Property Tax Portal
The portal consolidates Assessor, Board of Review, Clerk and Treasurer property-tax information.
Open Property Tax PortalAfter opening: search by PIN or property address, then review Tax Exemptions, Billed Amounts & Tax History, Refund Search, Documents / Deeds / Liens, Tax Appeals Dates and Tax Rates.
First check the Assessor record. Then check the Treasurer bill. If the exemption was approved but the bill is wrong, contact the appropriate office with the PIN and approval proof.
Appeal route
Homeowner Exemption vs. Assessment Appeal vs. Board of Review
A homeowner exemption filing is not the same as an assessment appeal.
File an exemption when the issue is eligibility or a missing benefit. File an appeal when the assessed value, classification, property characteristics or comparable value appears wrong.
Assessor appeal
Use this first-level route during the Assessor’s township appeal window.
Prepare comparable properties, photos, valuation evidence and the PIN.
Open Assessor AppealsAfter opening: check your township’s filing dates, choose residential appeal if applicable and submit evidence before the closing date.
Board of Review appeal
Use this second-level route when the Board of Review opens your township filing window.
The Board can confirm, revise, correct, alter or modify assessments under its authority.
Open Board of ReviewAfter opening: choose property owner instructions, log in to the BOR portal, confirm township deadlines and upload evidence.
Appeal dates and deadlines through the Property Tax Portal
Use the portal to check whether an appeal window is open for the Assessor or Board of Review.
Open Appeal Dates SearchAfter opening: search your PIN or address, then open Tax Appeals Dates & Deadlines to see current Assessor and Board of Review timing.
Local tax-rate issue
Chicago, Suburbs, Townships, Tax Codes and Why Neighboring Bills Differ
Cook County property-tax savings depend heavily on local tax rate and tax code.
A Chicago home, an Evanston home and an Orland Township home can have different tax rates even when the exemption amount is the same.
Two nearby homes can have different EAV, tax codes, TIF status, local rates, exemptions, appeals and refund history.
CookViewer Tax Map Viewer
Use the county map viewer for PIN, property address, parcel map and Clerk-related tax map review.
Open CookViewerAfter opening: search by 14-digit PIN, 10-digit PIN, dashed PIN, property address or intersection. Use the property panel to confirm parcel details before filing or appealing.
Tax bill and payment
Property-Tax Bills, Payments, Refunds and Senior Deferral
The Cook County Treasurer mails and collects property-tax bills.
The second installment is the bill where final tax rates, levies, assessments and approved exemptions are reflected.
For tax year 2025, Cook County officials stated second-installment bills were expected to be mailed September 1, 2026 and due October 1, 2026.
Cook County Treasurer property-tax payment page
Use the Treasurer site for current bill, payment, due date, refund and overpayment questions.
Open Treasurer SiteAfter opening: search by PIN or address, view the current bill, confirm exemption lines, pay online if needed and save the payment confirmation.
Cook County property-tax due dates
Use this page when you need the current official due date instead of a general estimate.
Open Due DatesAfter opening: confirm the tax year, installment number and exact due date before mailing or scheduling payment.
Deeds and recordings
When to Use the Cook County Clerk for Deeds, Liens and Property Fraud Protection
The Assessor’s property record is useful for assessment and exemption work.
It is not a substitute for the official recorded deed, lien, release, trust document or legal description.
The former Recorder of Deeds office no longer exists as a separate office. Recording operations are now handled by the Cook County Clerk.
Cook County Clerk recordings
Use the Clerk’s recordings area for deeds, liens, releases, recorded documents and property-fraud alert resources.
Open Clerk RecordingsAfter opening: search or request recorded documents, confirm document numbers and recording dates, and use the Property Fraud Alert option if you want notice of recorded-document activity.
If the owner name, trust, deed, probate or title chain is wrong, do not try to fix it only through an exemption application. Check recorded documents and get legal help when needed.
Decision path
What Should You Do Next?
If you live in the home and no exemption appears: find your PIN, open the Assessor exemption application and file for the correct tax year.
If the May 15 deadline has passed: use the Certificate of Error route for a missing eligible exemption.
If you are 65 or older: check both Senior Exemption and Senior Freeze, because they are different benefits.
If you are disabled: review the Persons with Disabilities Exemption and prepare accepted proof.
If you are a veteran: check Returning Veterans, Veterans with Disabilities and the WWII veteran category.
If the bill is high but exemptions are correct: check EAV, tax rate, levies and whether an assessment appeal is still open.
If deed or lien information is wrong: use Clerk recordings, not only the Assessor property page.
Important caution
Independent Information, Tax Caution and Property-Records Notice
This page is independent informational content for Cook County, Illinois homeowners.
It is not the official website of the Cook County Assessor, Treasurer, Clerk, Board of Review, Illinois Department of Revenue or any government agency.
It is not legal advice, tax advice, an official assessment notice, an official tax bill, an appeal decision or an exemption approval.
Verify forms, deadlines, exemption amounts, income limits, office hours, tax rates and bill details directly with official sources before filing, appealing or paying.
Property-record information should not be used for employment screening, tenant screening, credit eligibility, insurance underwriting or any other FCRA-regulated decision.
FAQs
Cook County Homestead Exemption FAQs
What is the Cook County homestead exemption called?
Cook County commonly calls the general homestead benefit the Homeowner Exemption. It is administered by the Cook County Assessor’s Office.
How much is the Cook County Homeowner Exemption?
The Homeowner Exemption reduces the Equalized Assessed Value of an eligible property by $10,000. The tax savings equals the EAV reduction multiplied by the local tax rate.
Where do I apply for the Cook County Homeowner Exemption?
Apply through the Cook County Assessor’s online exemption filing system or contact the Assessor’s Office at 312-443-7550 for help.
What was the 2026 deadline for tax year 2025 Cook County exemptions?
The Cook County Assessor listed May 15, 2026 as the main deadline for tax year 2025 exemption applications. Later filings are processed as Certificates of Error.
Do Cook County exemptions appear on the first installment tax bill?
Generally, exemptions appear on the second installment bill. The first installment is an estimated bill, while the second installment reflects final rates and approved exemptions.
Do I need to apply every year for the Homeowner Exemption?
No. The Homeowner Exemption generally renews automatically after approval as long as the property remains your principal residence.
What is the difference between the Senior Exemption and Senior Freeze?
The Senior Exemption is a fixed EAV reduction for eligible seniors. The Senior Freeze is an income-based benefit that freezes EAV, but the tax bill can still change if tax rates change.
What documents do I need for a Cook County exemption?
Most applicants need the 14-digit PIN, photo ID, occupancy proof and evidence of property-tax liability. Special exemptions may require income, disability, veteran, trust or cooperative documents.
What if an exemption was missing from a prior Cook County tax bill?
Use the Certificate of Error process through the Cook County Assessor if the property was eligible and the exemption was missing from a finalized or prior tax bill.
Who handles Cook County property tax payments?
The Cook County Treasurer handles property-tax bills, payments, refunds and overpayments. The Assessor handles exemption eligibility and assessments.
Official resources