Illinois Property Tax Appeal Guide
Appeal deadlines, exemptions, assessment rules, and county filing details for Illinois homeowners.
State Overview
In Illinois, property tax appeals are generally handled through the Board of Review / Property Tax Appeal Board. Assessment notices are typically issued Varies by county (typically January-August), and the appeal deadline is 30 days after publication of assessment list. LowerTheTax reviews comparable sales, assessment records, exemptions, and county filing rules before recommending whether to appeal.
Find Your County
Property tax rules can vary by county. Search for your county to see specific information.
Or select from major counties:
Real Property Information
Assessment Notice Issue Date
Varies by county (typically January-August)
Appeal Deadline
30 days after publication of assessment list
Tax Bills Issued
Varies by county
Payment Due Date
Two installments (varies by county)
Personal Property Information
Rendition Date
N/A (not taxed)
Assessment Notice
N/A
Appeal Deadline
N/A
Available Exemptions
Special Programs
Senior Citizens Assessment Freeze
Review eligibility and timing before filing a Illinois property tax appeal.
Property Tax Extension Limitation Law (PTELL)
Review eligibility and timing before filing a Illinois property tax appeal.
Longtime Homeowner Exemption
Review eligibility and timing before filing a Illinois property tax appeal.