Illinois Senior Freeze Guide

What the Illinois Senior Freeze actually does

The official Illinois program is called the Low-Income Senior Citizens Assessment Freeze Homestead Exemption. The Illinois Department of Revenue explains that it freezes the senior citizen’s equalized assessed value in the year the person qualifies. The EAV generally stays at that base amount as long as the homeowner keeps qualifying and keeps filing.

In plain English, the freeze is aimed at assessment growth. If your home assessment rises because home values rise, the exemption may reduce the taxable assessment by comparing the current EAV with your frozen base-year EAV.

It is not the same as a tax-rate freeze. Illinois property tax bills are also affected by the tax rates set by local governments, school districts, parks, libraries, townships, municipalities, and other taxing bodies. If rates increase, the bill can still increase even when the freeze is approved.

It is also not the same as the regular Senior Citizens Homestead Exemption. Many Illinois seniors may need both the senior homestead exemption and the Senior Freeze. The regular senior homestead exemption reduces EAV by a set amount. The Senior Freeze is income-based and works by freezing the home’s base assessed value for qualifying seniors.

Who may qualify

The statewide law is found in 35 ILCS 200/15-172. County forms may ask questions in different ways, but the main rules usually point back to this law.

A homeowner may qualify only if all required conditions are met. Age alone is not enough.

The law defines household broadly. It generally includes the applicant, the applicant’s spouse, and all people using the residence as their principal place of residence. This is one reason mistakes happen. A person may think only the senior’s income counts, but the form may require income from other household members too.

The income limit is changing after tax year 2025

As of May 16, 2026, Illinois has an important Senior Freeze income-limit change.

For tax years 2018 through 2025, the Illinois statute lists a statewide maximum income limitation of $65,000. For tax year 2026, it rises to $75,000. For tax year 2027, it rises to $77,000. For tax year 2028 and later, it rises to $79,000.

That matters because Illinois property taxes are often discussed by tax year and payable year. A 2025 tax year application affects taxes payable in 2026. A 2026 tax year application affects taxes payable in 2027.

Some counties already explain this transition. For example, DuPage County lists $65,000 for the 2025 application using 2024 household income and $75,000 for the 2026 application using 2025 household income. Lake County also shows $65,000 for assessment year 2025 and $75,000 for assessment year 2026.

What counts as household income

Do not assume the form uses only federal taxable income or adjusted gross income. Illinois Senior Freeze applications ask for total household income for the calendar year before the tax year.

The exact income worksheet may come from the county form, but common income categories can include Social Security, SSI, pensions, retirement distributions, wages, interest, dividends, capital gains, rental income, unemployment, and other income. Some items may be counted even when they are not taxable on the federal return.

For the Senior Freeze statute, veterans benefits are treated differently from many other income items. The safest step is to use the current county form and instructions, not memory from a past year.

Some applicants may be able to show enrollment in certain public programs instead of filling out the full income verification section, depending on the county process and tax year. Cook County, for example, lists AABD, SNAP, LIHEAP, Benefit Access, and the Senior Citizens Real Estate Tax Deferral Program as programs that can affect income verification for its current Senior Freeze filing process.

Where to start

Start with the county where the property is located. This is not filed with the IRS. It is not filed as part of your Illinois income tax return.

For most Illinois counties, look for the Chief County Assessment Office, County Assessor, or Supervisor of Assessments. The statewide IDOR page says applicants must file Form PTAX-340, the Low-Income Senior Citizens Assessment Freeze Homestead Exemption Application and Affidavit, with the Chief County Assessment Office.

County websites may use the state form number, a county-branded online form, or both. Some counties offer an online portal. Some mail renewal applications. Some require a signed paper form. Some require uploads or copies of income documents.

Basic steps before you file

• Find your property’s PIN or parcel number.
• Confirm the tax year on the application.
• Check the income year the form asks for.
• Gather proof of age and identity.
• Gather proof that you occupied the home as your principal residence.
• Gather proof of ownership, legal interest, or tax liability if the deed does not clearly show it.
• Gather income documents for all household members who must be counted.
• Check your county deadline, not just a general statewide date.

Deadlines are local enough to be dangerous

The Illinois statute says that, in counties with fewer than 3,000,000 people, applications are generally due by July 1 unless the county sets a different date by ordinance. Cook County, because of its size, uses an application period specified by the Chief County Assessment Officer.

That means a single statewide deadline can mislead people. DuPage County currently lists October 1 as its annual deadline. Other counties may use July 1 or another local date. Cook County posts its own filing periods and current-year application information through the Cook County Assessor.

Do not wait for the tax bill. Exemptions usually have to be filed through the assessment office before they show on the bill. If you wait until the bill arrives, the normal application window may already be closed.

Renewal: the step people miss

The Senior Freeze is not a one-time lifetime approval. The Illinois Department of Revenue says applicants must file each year. Cook County says automatic renewal is no and applicants must apply annually. Other counties may mail renewal forms to people who already received the exemption, but the homeowner still has to complete the renewal if required.

Renewal can be easy to overlook because the word freeze makes the program sound permanent. It is not permanent unless you continue to qualify and complete the required county filing.

If a parent or spouse received the freeze last year, check the current bill and the county property record to see whether it still appears. In Cook County, exemptions usually appear on the second installment bill, and the Assessor provides a property-details search where homeowners can review exemption history and status.

Documents and facts you may need

Each county can ask for its own proof. Cook County’s current documentation list is a useful example of what many applicants should expect, even if the exact documents differ elsewhere.

• Proof of age and identity: a driver’s license, state ID, passport, or another accepted document.
• Proof of occupancy: an ID with the property address, a bank statement, utility bill, pay stub, Social Security award letter, voting record, or other accepted proof.
• Proof of property tax liability: a recorded deed may be enough if the applicant is listed. If not, a deed, contract for deed, lease, trust agreement, stock certificate, or occupancy agreement may be needed.
• Income documents: federal or state tax returns, Social Security statements, 1099s, pension statements, or other income proof requested by the county.
• Trust paperwork: if the property is held in trust, the county may need proof that the applicant is a beneficiary or otherwise has the required legal interest.
• Death-related documents: if the eligible homeowner died, a surviving spouse or child may need a death certificate and county-specific affidavit or authority documents.

Do not send originals unless the county specifically tells you to. Keep a copy of the submitted application, proof documents, confirmation email, certified mail receipt, or online submission receipt.

What can go wrong

The Senior Freeze is helpful when it applies, but many problems are paperwork problems rather than eligibility problems.

The bill still goes up

This does not always mean the freeze failed. The freeze does not freeze tax rates. It also may not protect against value added by new improvements. Review the EAV, exemptions, and tax rate information before assuming the county made an error.

The renewal was missed

If the exemption was on last year’s bill but not this year’s bill, check whether the annual renewal was required and filed. Then call the county assessment office and ask whether a late renewal, corrected application, or certificate of error process is available.

The income year was wrong

A common mistake is using the current year’s income when the form asks for the previous calendar year. For example, a 2025 tax year application usually asks for 2024 household income.

A household member was left out

The county may review household income, not only the applicant’s income. If an adult child, spouse, relative, or other person lives in the home as a principal residence, ask whether that person’s income must be included.

The applicant moved, sold the home, or changed the PIN

Exemptions are tied to the property and the applicant’s qualifying residence. If a parcel number changed, a trust was created, a deed changed, or the homeowner moved, do not assume the old exemption followed automatically.

The issue is really an assessment appeal

The Senior Freeze is not the same as challenging an incorrect assessment. If the county’s property record is wrong, the market value is too high, the home is assessed differently from similar homes, or there are bad measurements, the homeowner may need an assessment appeal. The Illinois Department of Revenue’s assessment appeal guidance explains that appeals challenge assessed value, not the tax bill itself.

If you are late, denied, or confused

If you missed the deadline, do not assume nothing can be done. Call the county assessment office and ask three direct questions:

• Was the Senior Freeze application or renewal received for this tax year?
• If not, is there a late filing, certificate of error, or correction process?
• What exact documents are needed to review the missing exemption?

For non-Cook counties, Illinois law includes a limited extension rule when a late filing was caused by a severe mental or physical condition that made the applicant unable to file on time. This requires medical documentation and has limits. Ask the county office whether that rule applies before relying on it.

If the application is denied, ask for the reason in writing if it is not clear. Common denial reasons include income over the limit, missing proof of occupancy, missing signature, no proof of tax liability, wrong tax year, wrong property, or failure to show the home was the principal residence on the required date.

If the tax bill is already due and the exemption problem is unresolved, contact the county treasurer or collector about payment options. Do not ignore the bill while waiting. A property tax exemption problem and a tax collection problem can move on different tracks.

How this is different from other Illinois property tax relief

Property tax words can sound similar. They are not the same.

The Senior Freeze is not a deferral. It does not create a repayment debt just because the freeze was granted. That is different from the Illinois Senior Citizens Real Estate Tax Deferral Program. IDOR explains that the deferral is similar to a loan against the property’s market value, charges interest, and places a lien on the property. Deferred amounts generally must be repaid after sale, transfer, death, or loss of eligibility. You can read IDOR’s senior deferral publication before considering that separate program.

A simple call script

If you are helping a parent or spouse, this short script can keep the call focused:

Have the PIN, property address, applicant name, and tax year ready before calling. If the office gives a deadline or document list by phone, ask where it appears on the county website or form.