The single most common reason homeowners overpay isn't a weak case — it's a missed date. In Illinois, property tax appeals run on a strict, once-a-year clock that opens township by township. Miss your window and you're locked into that assessment for the cycle. Here's how the timing actually works in Will County, and how to make sure it never costs you.
The clock starts when your township is published
Will County reassesses on a rolling basis, township by township. When your township's new assessments are published in the local newspaper of record (and posted by the Supervisor of Assessments), that publication date starts your clock. From there you typically have about 30 calendar days to file an appeal with the Will County Board of Review.
Why the dates move every year
There's no single statewide deadline because timing depends on a few moving parts:
- Your township. Will County has many townships, and each is published on its own schedule. Your neighbor in the next township can have a completely different deadline.
- The reassessment cycle. Illinois generally reassesses on a multi-year cycle, with the quadrennial (every-fourth-year) reassessment being the big one — though you can usually appeal in any year.
- Publication timing. Even within Will County, publication dates shift year to year.
How to find your deadline
- Check the Will County Supervisor of Assessments / Board of Review pages. They post current publication dates and appeal windows by township.
- Watch for your township's assessment publication. The 30-day clock runs from that date.
- Call your township assessor. A two-minute call confirms your exact date and the forms you'll need.
The escalation path
If the Board of Review doesn't give you the reduction you're owed, Illinois homeowners can appeal further to the state Property Tax Appeal Board (PTAB), generally within 30 days of the Board of Review's decision. Most cases are resolved before that — but it's good to know the ladder exists.
The best time to know your deadline is the day your township is published. The second best time is right now.
What happens if you miss it
Generally, you wait. A missed window usually means you pay the assessed amount for that cycle and get your next chance the following year. The reliable move is to never miss the window in the first place.
The simplest way to never miss it
This is exactly the kind of thing we track for you. Tell us your address, and we monitor your township's publication date and the Board of Review window, flag it the moment it opens, and prepare your case in time. You don't have to decode Will County's township calendar — that's our job.