Look up your balance on the Cook County Treasurer's website using your 14-digit Property Index Number (PIN) or your property address. The record shows the amount due for the current installment, any unpaid prior years, payment history, and the due date. You can view or download the bill itself; no account is needed.
What you will see
- Current installment: the amount due and the due date. For the 2025 tax year the first installment was due April 1, 2026 and the second installment is due October 1, 2026 (what is on the October 1 bill).
- Prior years: any unpaid balance, with interest. Cook County charges 0.75% per month (9% a year) on late payments for tax year 2023 onward, per month or part of a month, so one day late costs a full month.
- Payment status: whether an escrow servicer has paid on your behalf. The record stays visible to you even when the paper bill goes to your lender.
If the amount looks wrong
Check that your exemptions appear on the bill. A missing Homeowner ($10,000 off equalized value) or Senior ($8,000) exemption is corrected through a Certificate of Error, not an appeal. If the exemptions are right and the bill still looks high, the assessed value behind it is the only part you can challenge — see How do I appeal my Cook County property taxes? and your township's deadline.
A faster way to see the whole picture
Enter your address or PIN in our free property check: it shows your current bill, your 20-year bill history with the PDFs, your assessment history, and whether the assessment is above what comparable homes are paying.