Illinois Homestead Exemption: General, Senior, and Disabled

The Illinois homestead exemption is not a single benefit but a set of property tax reductions available to homeowners who live in their property as a primary residence. The General Homestead Exemption cuts between $6,000 and $10,000 from your home’s equalized assessed value depending on the county. Seniors 65 and older can stack additional relief on top, including a separate exemption, an assessment freeze for lower-income households, and a state-run deferral program. Narrower exemptions exist for people with disabilities and for veterans returning from active duty.

What an Exemption Actually Saves You

Every Illinois homestead exemption reduces your equalized assessed value, or EAV. Illinois assesses property at one-third of fair market value, and county and state equalization multipliers adjust that figure across townships. Your local tax rate is applied to the EAV to produce your bill.

So when an exemption removes $6,000 from your EAV, the dollar savings depend on your local rate. At a combined rate of 8%, a $6,000 reduction saves $480 a year. At 12%, the same reduction saves $720. Exemptions stack when you qualify for more than one, which is why a senior who also qualifies for the freeze can see a much larger combined reduction than the numbers on any single exemption suggest.

General Homestead Exemption

Any homeowner who occupies the property as a principal dwelling on January 1 of the tax year qualifies, regardless of age or income. The reduction depends on where the property sits:¹

Cook County: up to $10,000
DuPage, Kane, Lake, McHenry, and Will counties (contiguous to Cook): up to $8,000
All other Illinois counties: up to $6,000

The $8,000 tier for the five collar counties took effect for taxable year 2023. If you own a home in one of those counties and your bill still shows a $6,000 exemption, ask the assessor to confirm the amount.¹

Investment properties, vacation homes, and rentals don’t qualify. In most counties outside Cook, the exemption is applied automatically based on your prior-year filing. Cook County requires an application through the Assessor’s Office.

Senior Citizens Homestead Exemption

Homeowners who turn 65 at any point during the tax year get a separate exemption on top of the general one:²

Cook County and contiguous counties: up to $8,000
All other counties: up to $5,000

The senior exemption gives the same $8,000 reduction in Cook and the collar counties. A 66-year-old in Lake County, for example, gets an $8,000 general exemption plus an $8,000 senior exemption, for $16,000 off the EAV. At a 9% tax rate, that’s $1,440 a year.²

Filing rules vary. Some counties require only an initial application and then auto-renew each year. Cook County requires seniors to file annually.³

Senior Citizens Assessment Freeze

The freeze is the strongest tool available to lower-income seniors, and it works differently from a flat reduction. Rather than subtracting a fixed dollar amount, it locks your EAV at whatever it was in the base year you first qualified. If assessed values in your neighborhood rise later, your taxable assessment stays at the lower figure.⁴

You must meet all three conditions:

Age 65 or older
The property has been your primary home for the current and preceding tax year
Total household income of $65,000 or less

The income count includes nearly every source: Social Security, pensions, interest, and other earnings. Veterans’ benefits are excluded.⁴

One limit is worth understanding. The freeze protects you from assessment increases only, not from tax rate increases. If a school district referendum passes and rates go up, your bill can still climb even with a frozen EAV. The freeze also has to be renewed every year by filing Form PTAX-340 with the county assessor, along with income documentation for the prior year.³

Senior Citizens Real Estate Tax Deferral

The state tax deferral program often gets grouped with the exemptions above, but it is not one. It is a loan from the State of Illinois that pays your property taxes for you. A lien is placed on the home, and the deferred amount plus interest comes due when the property is sold or transferred.⁵

Eligibility for the 2026 tax year:

Age 65 or older by June 1 of the filing year
Total household income of $77,000 or less
Owned and occupied the property as a primary residence for at least three years
No delinquent property taxes or special assessments on the property
Adequate fire or casualty insurance in place

The maximum annual deferral is $7,500, and deferred amounts carry 3% simple interest per year. A surviving spouse who is at least 55 can continue the deferral. Applications run from January 1 through March 1 each year and go to the county collector, not the assessor.⁵

Disabled Persons and Returning Veterans

Two narrower exemptions round out the list.

The Disabled Persons Homestead Exemption provides a $2,000 EAV reduction for homeowners who are unable to engage in substantial gainful activity due to a physical or mental impairment expected to last at least 12 months or result in death. Proof of Social Security disability, or an Illinois Disabled Person Identification Card showing a Class 2 disability, satisfies the documentation requirement. The exemption is renewed each year on Form PTAX-343-R.⁶

The Returning Veterans’ Homestead Exemption gives a $5,000 EAV reduction for the tax year in which a veteran returns from active duty in an armed conflict involving U.S. forces. It is a one-time benefit tied to the year of return. Applications go on Form PTAX-341, filed with the county assessor.³

How to Apply

All homestead exemption applications go through your county’s Chief County Assessment Officer. The one exception is the senior tax deferral, which the county collector handles. Which form you need depends on the exemption:

General Homestead Exemption: applied automatically in many counties outside Cook. Cook County requires an application through the Cook County Assessor.
Senior Citizens Homestead Exemption: Form PTAX-324. Some counties auto-renew after the first filing; Cook County requires annual filing.
Senior Citizens Assessment Freeze: Form PTAX-340, filed annually with income documentation.
Disabled Persons Homestead Exemption: Form PTAX-343 initially, then Form PTAX-343-R for annual renewal.
Returning Veterans’ Homestead Exemption: Form PTAX-341.

Have a photo ID, proof that you occupy the property, and the Property Index Number from your tax bill. If your ID address does not match the property, most counties accept alternative documentation such as utility bills, bank statements, or voter registration.³

Deadlines vary by county and typically fall in the first months of the calendar year. Confirm the exact date with your local assessor, because missing it has real consequences.

If a Prior Year’s Exemption Was Missed

If an exemption you were entitled to didn’t appear on a prior bill, you may still be able to recover it. In Cook County, homeowners can file a Certificate of Error to claim missed exemptions for the current year and up to three prior tax years.⁷

Other counties have their own correction procedures, but many offer something similar. Check each property tax bill when it arrives to confirm every exemption you applied for shows up as a line-item reduction. If one is missing, contact the assessor right away rather than waiting for the next cycle.

Penalties for Keeping an Exemption You No Longer Qualify For

Illinois treats erroneous homestead exemptions seriously, and the penalties scale with how long the exemption went uncorrected. If the county finds one or two erroneous exemptions within the prior three collection years, you owe the back taxes plus 10% annual interest from the date those taxes were originally due.⁸

Consequences jump if the pattern is longer. Three or more erroneous exemptions within the prior six collection years bring back taxes, a 50% penalty on the erroneous amount, and 10% annual interest. The county files a lien against the property, and any liability that goes unpaid past its due date accrues an additional 1.5% per month.⁸

There’s a self-report window. If you notice you’ve been receiving an exemption you don’t qualify for and tell the assessor within 60 days of receiving your assessment notice, you owe the back taxes and interest but avoid the 50% penalty.⁸ The most common trigger is converting a former primary residence to a rental or second home and letting the exemption keep applying automatically. Correcting it yourself is far cheaper than being caught.

1
FindLaw. Illinois Code 35-200/15-175 – General Homestead Exemption
2
FindLaw. Illinois Code 35-200/15-170 – Senior Citizens Homestead Exemption
3
Illinois Department of Revenue. Property Tax – Exemption Information (PIO-74)
4
FindLaw. Illinois Code 35-200/15-172 – Senior Citizens Assessment Freeze Homestead Exemption
5
Illinois Department of Revenue. Senior Citizens Real Estate Tax Deferral Program (PIO-64)
6
Illinois General Assembly. Illinois Compiled Statutes 35 ILCS 200/15-168 – Disabled Persons Homestead Exemption
7
Cook County Assessor’s Office. Property Tax Exemptions
8
Illinois General Assembly. Illinois Compiled Statutes 35 ILCS 200/9-275