The Cook County senior tax exemption, formally the Senior Citizen Homestead Exemption, lowers the equalized assessed value (EAV) of your primary residence by $8,000 if you are 65 or older. That reduction flows straight through to your property tax bill. Applications for the 2025 tax year must reach the Cook County Assessor’s Office by May 15, 2026. Once approved, the exemption renews on its own each year.
Who Qualifies
Three things have to be true for the same tax year. You must turn 65 at some point during that year; a birthday on December 31 still counts for the full year. You must be an owner of record or hold a legal or equitable interest in the property, including through a trust you can document. And the home must be your principal residence, meaning you actually live there.1Illinois General Assembly. 35 ILCS 200/15-170 – Senior Citizens Homestead Exemption
A standard leasehold interest does not qualify. The one exception: if you own a single-family home that sits on land you lease, that counts.1Illinois General Assembly. 35 ILCS 200/15-170 – Senior Citizens Homestead Exemption
What the $8,000 Actually Saves You
The $8,000 comes off your EAV, not off your tax bill. Your dollar savings depend on the composite tax rate in your local taxing district, which varies widely across Cook County. To estimate the benefit, multiply $8,000 by that rate. In a district with a 10 percent composite rate, you save about $800 a year. At 20 percent, closer to $1,600.2Cook County Assessor’s Office. Senior Exemption
No check gets mailed. The savings show up as a line item on your second-installment tax bill, or on an adjusted bill if your application was processed late.
How to Apply
The Cook County Assessor’s Office takes applications online through its property tax filings portal and by mail. Paper applications go to 118 North Clark St., Room 320, Chicago, IL 60602. Send copies, never originals; the office will not return documents.2Cook County Assessor’s Office. Senior Exemption
What You Need to Submit
You will need your 14-digit Property Index Number (PIN), which appears on your tax bill, your deed, and assessment notices, or you can look it up by address on the Assessor’s website.3Cook County Assessor’s Office. Where Do I Find My PIN
For proof of identity, age, and occupancy, a single photo ID showing your property address is enough. The Assessor accepts an Illinois driver’s license or state ID, a Matrícula Consular ID, or a City of Chicago ID Card. If the address on your photo ID does not match the property, submit a second photo ID (a passport, naturalization certificate, or permanent resident card works) plus a document showing you lived at the property, such as a bank statement, utility bill, pay stub, or Social Security award letter.2Cook County Assessor’s Office. Senior Exemption
The application includes an occupancy affidavit sworn under penalty of perjury.
Proof of Ownership
If you are listed on the deed recorded with the Cook County Clerk, staff can verify ownership and you do not need to send anything. If not, submit one of the following: an unrecorded deed, a contract for deed, a lease, a trust agreement, a stock certificate, or an occupancy agreement.2Cook County Assessor’s Office. Senior Exemption
The May 15 Deadline and What Happens If You Miss It
Applications for the 2025 tax year must be received by May 15, 2026. Anything that arrives after will not show up on your regular second-installment bill. Instead, it is routed through the Certificate of Error procedure, which produces a corrected bill or refund later rather than reducing what you owe up front.2Cook County Assessor’s Office. Senior Exemption
Automatic Renewal
After your first approval, the Assessor renews the exemption each year without a new application.2Cook County Assessor’s Office. Senior Exemption If you sell, transfer the deed, or move to a different primary residence, that renewal stops. The new owner, or you at the new address, has to file a fresh application.
The Assessor’s Office may send a postcard or letter confirming which exemptions are set to renew. If anything on that notice is wrong, respond quickly so you don’t lose the exemption for the year.
If You Move to a Nursing Home
Entering a licensed nursing home, assisted living facility, or similar care setting does not automatically end the exemption. If a spouse who is 65 or older stays in the home, it continues. And even if the home sits unoccupied, the exemption continues as long as you still own it.1Illinois General Assembly. 35 ILCS 200/15-170 – Senior Citizens Homestead Exemption
Recovering Missed Years
If you were eligible in a prior year but the exemption never appeared on your bill, you can claim it retroactively. A Certificate of Error lets the Assessor correct a bill that has already been issued, including ones you have already paid, for the current tax year plus up to three prior years.4Cook County Assessor’s Office. Homeowners: Are You Missing Exemptions on Your Property Tax Bill? If granted, the correction comes as either an adjusted bill or a refund for the difference.5Cook County Assessor’s Office. Certificates of Error
Check your second-installment bill each year for the “Senior Exemption” line item. If it is missing, file the Certificate of Error application through the Assessor’s Office.
Other Senior Breaks That Can Stack
The $8,000 exemption is one of several programs. The Low-Income Senior Citizens Assessment Freeze, usually called the Senior Freeze, locks your EAV at its level from the year before you first qualified. As values rise, the gap, and your exemption, grows with them. For the 2026 tax year, total household income cannot exceed $75,000.6Illinois General Assembly. 35 ILCS 200/15-172 – Senior Citizens Assessment Freeze Homestead Exemption Unlike the standard senior exemption, the Freeze requires an annual application with income documentation.7Cook County Assessor’s Office. Low-Income Senior Freeze Exemption If you qualify for both, they apply together.
Seniors who still cannot cover the bill can defer part of it through the state’s Senior Citizens Real Estate Tax Deferral Program. The State of Illinois pays your property taxes, charges 3 percent simple interest a year, and records a lien on the home. The balance is repaid when the home is sold or transferred, or within a year of the owner’s death. For the 2026 tax year, household income cannot exceed $77,000, you must have owned and occupied the home for at least three years, you cannot be delinquent on property taxes, and you must carry adequate homeowner’s insurance. The maximum deferral is $7,500 per year, and total deferred amounts (including interest and lien fees) cannot exceed 80 percent of your equity. Applications are due between January 1 and March 1 each year.8Illinois Department of Revenue. Senior Citizens Real Estate Tax Deferral Program (PIO-64) A surviving spouse who is at least 55 can continue the deferral within six months of the taxpayer’s death.
If Your Mortgage Pays Your Taxes
When taxes are paid through a mortgage escrow account, the exemption will eventually lower your monthly payment, but not right away. Mortgage servicers run an annual escrow analysis that recalculates how much needs to be set aside for taxes and insurance. Once that analysis reflects the smaller tax bill, your monthly escrow payment should drop, and any surplus above the required cushion is refundable.9Consumer Financial Protection Bureau. 12 CFR 1024.17 – Escrow Accounts If months pass and nothing changes, call your servicer and ask when the next analysis is scheduled.