The Pattington Apartments on Irving Park Road in Uptown. Photo: Kgallagher2, CC BY-SA 4.0, via Wikimedia Commons.
The second installment of Cook County’s 2025 property-tax bills was due Thursday, Oct. 1, after going out about two months later than the old midsummer schedule.
The treasurer’s office lists that due date on its official payment and due-date page: Tax Year 2025 first installment due April 1, 2026, and the second installment due Oct. 1, 2026. CBS Chicago reported that second-installment bills, which typically go out in July and are due in August, were available online and were to be mailed to about 1.8 million owners by Sept. 1, with payment due Oct. 1. Treasurer Maria Pappas’s Aug. 24 release had already said bills would be in mailboxes by Sept. 1 and due Oct. 1.
The delay is not new. CBS noted that first-installment 2025 bills also went out a month late, and that last year’s second installment was four months late, a lag the station tied to a long-running technology upgrade. Late bills squeeze the local governments that depend on the money; CBS reported that the county has a $300 million fund for no-interest loans to those governments while they wait.
Owners who still need to pay can do it online at cookcountytreasurer.com, or, with a payment coupon, at Chase Bank branches in Illinois, the treasurer’s office says. The second installment date has now passed, so anyone who has not paid should check the treasurer’s site for the current amount due, including any penalty, rather than relying on the original bill.
