Illinois Tax Proration Calculator
Calculate real estate tax prorations for Illinois properties (taxes paid in arrears)
Tax Information
Enter the property tax details and closing information
Calculation Results
Tax proration breakdown for the closing
Enter tax information and closing date to calculate proration
About Illinois Tax Proration
Paid in arrears: The taxes for the current year (e.g., 2024 taxes) are paid in the following year (e.g., 2025).
Two installments: The property tax bills are typically paid in two installments, usually due in the spring and fall of the following year. In many counties, the first installment is due around June 1st and the second around September 1st.