Clear Money Guide
What this state guide covers
A quick view of the questions, practical details and source notes below.
Updated August 20, 2026. Quick answer: Illinois runs a freeze and exemption and deferral for senior homeowners. The thresholds that decide it — Exemption: age 65+. Freeze: age 65+; income limit $75,000 or less for the 2026 tax year, rising to $77,000 for 2027 and $79,000 for 2028 (2026). Deferral: age 65+; income limit $75,000 (2025), $77,000 (2026), $79,000 (2027 onward) (2026). The programme type is what matters most: it decides whether your bill is reduced, held flat, refunded based on income, or merely postponed. And postponed is the one to look at twice — a deferral is a debt against the house, not a discount.
What Illinois offers
- Exemption — age 65+. Senior Citizens Homestead Exemption. Reduces equalised assessed value by $8,000 in Cook County and contiguous counties, or $5,000 elsewhere. Initial Form PTAX-324, renewed annually.
- Freeze — age 65+; income limit $75,000 or less for the 2026 tax year, rising to $77,000 for 2027 and $79,000 for 2028 (2026). Senior Citizens Assessment Freeze Homestead Exemption. Freezes the home’s equalised assessed value at a base-year level. Must be refiled annually on Form PTAX-340.
- Deferral — age 65+; income limit $75,000 (2025), $77,000 (2026), $79,000 (2027 onward) (2026). Senior Citizens Real Estate Tax Deferral Program. Defer up to $7,500 a year of property tax, capped at 80% of home equity, as a state loan at 3% simple annual interest. Filing window 1 January to 1 March.
The deferral trap
Illinois lets qualifying seniors defer property tax. A deferral is not relief in the ordinary sense: the tax is still owed, it accumulates, and it is typically secured against the home and repayable when the owner dies, sells or moves out. Confirmed directly from tax.illinois.gov publication PIO-64: deferred amounts become a lien on the property under the recorded tax deferral and recovery agreement, repayable with 3% simple interest when the property is sold or transferred, or WITHIN ONE YEAR OF THE TAXPAYER’S DEATH. For a homeowner whose plan is to leave the house to their children that matters enormously — the heirs inherit the debt with the property. It can still be the right choice for someone who needs cash flow now and has no heir depending on the equity. How deferral liens work.
How to apply
Chief county assessment office for the exemptions; county collector for the deferral, Forms IL-1017 and IL-1018
Two things to check before you count on it
- Thresholds move. Age and income limits are reset by legislatures and are frequently indexed. Every figure above carries the year we confirmed it; confirm the current one before you budget around it.
- Your county may add its own. Statewide programmes are the floor. Counties and municipalities frequently run additional exemptions, and those are where a lot of real money sits.
Source: Illinois state materials, read 2026-08-03.
Compare all states: property-tax relief for seniors by state. What the programme types mean: freeze vs exemption vs circuit-breaker. The rest of the picture in this state: Illinois retirement taxes.
Program classifications and thresholds are read from each state’s own revenue department, comptroller or statute, at the source linked on the state page. Dollar and income thresholds change most years and are labelled with the year we confirmed them — check the current figure with the state or your county before relying on it. General information, not tax advice.
Disabled Veteran Property Tax Relief in Illinois: $2,500 to $250,000 EAV Tiers
35 ILCS 200/15-169(b), (b-3) is the primary authority for this state-specific rule.
- Illinois grants a $2,500 annual exemption for a service-connected rating from 30% through 49%.
- At 70% or more, the first $250,000 of equalized assessed value is exempt.
- A surviving spouse receiving dependency and indemnity compensation after a service-connected death can receive the first-$250,000 EAV exemption.
Before applying, match the rating letter, ownership, occupancy, survivor status, and filing timing in your records to the controlling text; confirm current filing instructions with the administering agency.
Compare veteran property-tax mechanisms across jurisdictions, then verify this state rule in the official source.
Deferral is the one relief type on this page that postpones the bill rather than reducing it, and secures the postponed amount against the home: Illinois’s senior property-tax deferral works through the exact interest rate, the repayment triggers, and whether the lien outranks an existing mortgage.