Property Tax Exemptions You're Probably Not Claiming in Illinois

Illinois doesn't run one homestead exemption. It runs at least six, stacked in different combinations depending on your age, income, disability status, and whether you've recently renovated. The deadlines aren't even consistent across the state; they're set county by county. If you've only ever filed the basic one, there's a real chance you're leaving money on the table.

The one almost everyone has

Every owner-occupied primary residence qualifies for the General Homestead Exemption, which reduces your home's equalized assessed value, not its market value, by up to $10,000 in Cook County or $6,000 elsewhere in the state. Illinois calculates property tax off this equalized assessed value (EAV), which is a fraction of market value adjusted by a county equalization factor, so the exemption amount looks smaller in dollars than the actual tax relief it provides. Most counties grant this one automatically once you're on file. It's the one exemption on this list you're least likely to be missing.

The one you have to remember every single year

The Senior Freeze is different from every other exemption here in one important way: you have to refile annually, using Form PTAX-340, or it lapses. It freezes your home's equalized assessed value at the level from the year you first qualify, which means your taxable value doesn't rise even if your home's market value does. For homeowners 65 or older with 2025 household income of $75,000 or less, this is often the single most valuable exemption available, and it's also the one most likely to quietly disappear because nobody remembered to refile. That income limit itself just moved: a law signed in December 2025 raised it from $65,000 to $75,000 for 2026, rising again to $77,000 in 2027 and $79,000 from 2028 on.

The one for people who just renovated

Added a room, finished a basement, or rebuilt after damage? The Homestead Improvement Exemption shields up to $75,000 of the market value your renovation added, for four years or until you sell, whichever comes first. Most homeowners find out about this one after their tax bill jumps the year following a renovation, when a call to the assessor's office would have prevented it.

The one for veterans, scaled to disability rating

Illinois runs a sliding-scale exemption for veterans with service-connected disabilities: a 30 to 49% rating gets a $2,500 reduction, 50 to 69% gets $5,000, and a rating of 70% or higher exempts the property from tax entirely. A separate, smaller exemption exists for veterans returning from active duty in an armed conflict, worth $5,000 for two years. These require their own applications and documentation, and Illinois doesn't let a property claim the disability exemption for persons with disabilities and the veterans' disability exemption in the same year, so if both could apply, you're choosing one, not stacking both.

The name that means something else entirely

Illinois also has a completely unrelated "homestead exemption" under its bankruptcy law, protecting $15,000 of home equity from creditors. It has nothing to do with property tax and won't show up on your tax bill. If you're researching this topic and land on a page about creditor protection instead of tax relief, that's why.

What to actually check

Look at your property tax bill's exemption section, or call your county's Supervisor of Assessments or Chief County Assessment Officer, and ask two things: whether your General Homestead Exemption is current, and if you're 65 or older, whether your Senior Freeze application is filed for this year specifically, not just on file from a prior year. Deadlines vary by county, so don't assume the date a neighbor in a different county mentions applies to you.