Cook County property owners have until October 1 to pay the second installment of their 2025 property taxes. But as the bills are going out, NBC 5 Responds reports some residents are receiving long-awaited refund checks from the county.
According to the Cook County Treasurer, 3,707 certificates of error refund checks will be mailed out this month. This comes after the Treasurer’s office resumed mailing out certificate of error refunds in December, following a seven-month long pause.
The county says it stopped sending out refund checks while the county’s operating system was undergoing an upgrade.
You may receive a refund check if you previously filed a certificate of error with the county, and it was approved but not paid out. So far, more than 45,000 refunds have been mailed since December, totaling over $59,100,000 according to the Treasurer’s office.
Certificates of error are filed by residents who believe their property was incorrectly assessed or if tax exemptions weren’t applied to their property tax bill.
If you receive a certificate of error in the mail, you still must pay your current property tax bill.