Illinois Senior Property Tax: The $5,000 Homestead Exemption, the $75,000 Assessment Freeze, and the Annual PTAX-340 Reapplication
Updated April 2026
Illinois operates two distinct senior property tax programs that work together. The Senior Citizens Homestead Exemption is universal for owners 65+ and reduces equalized assessed value by $5,000 with no income test. The Senior Citizens Assessment Freeze Homestead Exemption (often shortened to “Senior Freeze”) is income-tested at $75,000 household income for the 2025 income year (taxable in 2026) and freezes equalized assessed value at the year of qualification. Both run through the county Supervisor of Assessments or County Assessor; the Assessment Freeze requires annual reapplication on Form PTAX-340 each year, which is the single most common reason qualifying seniors lose the freeze, they forget to renew.
Senior Citizens Homestead Exemption ($5,000, No Income Cap)
The simpler of the two programs. Eligibility: age 65 or older as of the tax year, owner-occupant of the property as a primary residence, and personally liable for the property tax. Reduces the equalized assessed value (EAV) by $5,000.
EAV is Illinois's assessed value figure after the state equalization factor is applied, different from raw assessed value used in many other states. The $5,000 reduction is applied to EAV, then the local property tax rate is multiplied against the reduced EAV. At a typical Illinois rate of 8-10% of EAV (depending on county), the $5,000 reduction translates to roughly $400-$500 in annual property tax savings.
Once granted, this exemption auto-renews in most counties as long as the homeowner continues to qualify, no annual reapplication unless the county requests one. This is the opposite of the Assessment Freeze, which does require annual filing.
Senior Citizens Assessment Freeze Homestead Exemption (Income-Tested, $75,000 Cap)
The headline Illinois senior benefit. Locks the equalized assessed value of the homestead at the “base year EAV”, the EAV in effect when the senior first qualified for the freeze. Subsequent EAV increases (driven by reassessment, equalization factor changes, or both) do not flow through to the freeze-protected portion of the bill.
Eligibility:
- Age 65 or older, OR a surviving spouse who qualifies under specific conditions.
- Total household income at or below $75,000 for the 2025 income year (the cap that applies to 2026 tax bills). The income definition includes Social Security, pensions, interest, dividends, capital gains, broader than federal AGI.
- Owner of the property and liable for the property tax for at least the past two years (in most counties).
- Primary residence as of January 1 of the tax year.
Form PTAX-340 must be filed each year. This is the program's biggest gotcha. Unlike the basic Senior Homestead Exemption (which auto-renews), the Assessment Freeze requires affirmative annual reapplication. Counties typically mail reminder forms in late winter or early spring; missing the renewal drops the senior off the freeze and the EAV reverts to current values for the next tax cycle. Calendar the renewal, counties don't legally have to chase you twice.
How the Two Exemptions Stack
Both exemptions can apply to the same property simultaneously. Sequence:
- The Assessment Freeze locks the base year EAV.
- The Senior Citizens Homestead Exemption reduces that frozen EAV by $5,000.
- The local property tax rate is applied to the reduced EAV.
For a senior who qualifies for both, the Freeze does the heavy lifting (preventing year-over-year increases that compound over a long-tenure homestead) and the $5,000 Homestead Exemption provides a steady additional reduction on top. The combined effect over 15+ years of holding the same Illinois homestead can be tens of thousands of dollars in cumulative tax savings, particularly in fast-appreciating counties like Cook, DuPage, and Lake.
Other Illinois Senior Programs Worth Knowing
Two adjacent programs that don't replace the homestead/freeze framework but add to it:
- Senior Citizens Real Estate Tax Deferral Program, qualifying seniors with income below approximately $65,000 can defer up to $7,500 of property tax annually, repaid as a lien when the home is sold or the homeowner dies. Administered through the county collector's office.
- Disabled Veterans Standard Homestead Exemption, separate from the senior programs, ranges from $2,500 to full exemption based on VA disability rating (30%-69% rating: $2,500; 70%-99%: $5,000; 100% rating: full property tax exemption on the homestead).
- Returning Veterans Homestead Exemption and Disabled Persons Homestead Exemption, additional layered programs for specific qualifying conditions, each separate from the senior programs.
Frequently Asked Questions
My income is $80,000. Am I disqualified from the Senior Freeze?
For the 2026 tax cycle, yes, the income cap is $75,000 for 2025 income. You still qualify for the Senior Citizens Homestead Exemption ($5,000 EAV reduction, no income test). The Senior Freeze income cap is set by statute and adjusts periodically; an income drop in a future year could open eligibility, but for now you're above the line. The Senior Citizens Real Estate Tax Deferral Program has a different (lower) income limit; check that program separately if cash-flow is the primary concern.
I forgot to file the PTAX-340 last year. Did I lose my Senior Freeze permanently?
Not permanently, but you lost it for the year you missed the filing. Refile Form PTAX-340 for the current year with your county Supervisor of Assessments. If your eligibility hasn't changed, you'll be re-enrolled, but the freeze base year resets to the current EAV, not the EAV you had when you first qualified. So if your home's EAV grew between the year you first froze and now, the new freeze is at the higher current EAV. The lesson: calendar the annual renewal, because skipping a year locks in a higher base when you re-enroll.
I'm 67 and a 100% service-connected disabled veteran. Senior or DV exemption?
The Disabled Veterans 100% Standard Homestead Exemption is the strongest path, it provides a full property tax exemption on the homestead, materially better than either the $5,000 Senior Homestead or the Assessment Freeze. The DV exemption is income-blind. File the DV application with your county; the Senior programs become unnecessary if you qualify for full DV exemption. Pull your VA rating decision letter to document the 100% service-connected permanent total disability rating.
If I appeal my assessment after the Senior Freeze is in place, does it still help me?
Yes, in some scenarios. The Senior Freeze locks EAV at the base year; if your base year EAV was wrong (too high), an appeal that establishes a lower correct EAV may, depending on county practice, retroactively adjust the frozen base. More commonly, an assessment appeal helps homeowners who haven't yet enrolled in the freeze, fixing the EAV before initial qualification ensures the freeze locks at a defensible base rather than an inflated one. The right sequence is: appeal first, then qualify for the freeze. Reverse order creates problems.
