Cook County Senior Property Tax Exemption: Savings and How to Apply

The Cook County senior property tax exemption reduces the taxable value of your home by $8,000 each year if you’re 65 or older and live in the property you own. Once the Cook County Assessor’s Office approves you, the exemption renews automatically. For tax year 2025, applications are due May 15, 2026.¹

Who Qualifies

Three things have to be true during the tax year you’re claiming. You have to turn 65 at some point that year, own the home (or hold a qualifying interest in it), and use it as your primary residence. You also need to be the person responsible for paying the property taxes.²

Ownership is defined broadly. A standard deed in your name works, but so does an equitable interest through a trust, a contract for deed, or a lease on land where your single-family home sits, as long as you pay the taxes.² Cooperative apartment owners qualify too, though they need to submit a stock certificate or occupancy agreement with the application.¹

Moving into a nursing home or assisted living facility doesn’t automatically end the exemption. If you were already receiving it and then enter a licensed care facility, the exemption continues as long as either your spouse (also 65 or older) still lives in the home, or the home stays unoccupied while you remain the owner.² A spouse under 65 living in the home doesn’t preserve the exemption through this rule.

What the $8,000 Actually Saves You

The $8,000 comes off your Equalized Assessed Value before the local tax rate is applied.¹ It’s not $8,000 off your bill. Your actual savings depend on the combined tax rate in your taxing district. At a 10% rate, the exemption saves you $800. At 7%, it’s $560.

Qualifying for the Senior Exemption also qualifies you for the general Homeowner Exemption, and you don’t need to file a separate application.¹ The Homeowner Exemption knocks another $10,000 off EAV, so together they reduce your taxable value by $18,000. The savings show up on the second installment of your property tax bill.³

How to Apply and What You’ll Need

You’ll need your Property Index Number, the 14-digit code that identifies your parcel. It’s on your property tax bill. What documents you submit beyond that depends on whether your photo ID shows the property address.

If your Illinois driver’s license, Matrícula Consular ID, or City of Chicago ID card lists the property address, that single document covers proof of identity, age, and occupancy. You sign an occupancy affidavit as part of the application.¹

If your photo ID doesn’t match the property address, you need two additional documents: a second photo ID from a broader list (which includes a passport, permanent resident card, or naturalization certificate) and one document proving you lived at the property during the tax year. Acceptable proof of occupancy includes a bank statement, a landline or cable bill, a pay stub, a Social Security award letter, or a voting record from that year.¹

If you aren’t listed on the recorded deed at the Cook County Clerk’s Office, bring the unrecorded deed, trust agreement, lease, contract for deed, or stock certificate that shows your interest. If you are on the recorded deed, no extra paperwork is needed to verify your tax liability.¹

The Assessor’s online filing portal is the fastest route and generates a confirmation when you finish.¹ You can also mail a paper application. If you mail it, send copies rather than originals since documents won’t be returned, and certified mail gives you proof of delivery.

The deadline for tax year 2025 is May 15, 2026. Late applications get routed through the Certificate of Error procedure, which takes longer and delays your savings. If you recently bought your home or plan to move mid-year, you may qualify for a prorated exemption; in that case you’ll also need a closing or settlement statement.¹

Automatic Renewal

Once the Senior Exemption appears on your tax bill, you don’t reapply. The Assessor’s Office renews it each year on its own.¹ Check your next second-installment bill for the “Senior Exemption” line to confirm it was applied.

Auto-renewal stops if you sell the property, transfer the deed, or move out. In any of those situations, you’ll need to file a fresh application at your next primary residence.

Claiming Missed Years

If you were eligible in a past year but never applied, you can still recover those savings. The Assessor’s Office allows retroactive claims through its Certificate of Error process for tax years 2021, 2022, 2023, and 2024. Online filing is available for 2021 through 2023.⁴

Four years of missed exemptions can add up to several thousand dollars. Approved refunds show up either on your next second-installment bill or on a separate adjusted bill sent shortly after.⁴

One tax wrinkle: if you itemized property taxes on a prior-year federal return and then receive a refund for that same year, the IRS may treat part of the refund as taxable income under the tax benefit rule. IRS Publication 525 has a worksheet for figuring it out. If you took the standard deduction in the year the taxes were originally paid, this generally doesn’t apply.

Don’t Confuse It With the Senior Freeze

The Senior Exemption is different from the Senior Citizens Assessment Freeze Homestead Exemption, and people mix these up constantly. The Senior Freeze is a separate program under 35 ILCS 200/15-172 that locks in your property’s EAV at the level it was when you first qualified, so future assessment increases don’t raise the taxable portion.⁵

The Freeze is income-tested. For tax year 2026, total household income has to be $75,000 or less, and that income figure includes everyone in the household, not just the property owner.⁵ You can receive both the Senior Exemption and the Senior Freeze on the same home.³ Unlike the Senior Exemption, though, the Freeze has to be reapplied for every year so the Assessor’s Office can reverify your income.⁶ Skip a year and you may end up with a new, higher base if your assessment climbed in the interim.

1
Cook County Assessor’s Office. Senior Exemption
2
Illinois General Assembly. 35 ILCS 200/15-170 – Senior Citizens Homestead Exemption
3
Cook County Assessor’s Office. Property Tax Exemptions
4
Cook County Assessor’s Office. Certificates of Error
5
Illinois General Assembly. 35 ILCS 200/15-172
6
Cook County Treasurer’s Office. Senior Citizen Assessment Freeze Exemption