2024 Cook County Second Installment Property Tax Bills are Due December 15, 2025

The 2024 Cook County second installment property tax bills were mailed by the Treasurer’s Office as of November 14, 2025. The Treasurer’s Office must receive payment no later than December 15, 2025 to avoid penalty interest.

The second installment property tax bills were substantially delayed due to various technical difficulties which resulted from an “upgrade” to Cook County’s property tax computer systems. The tax bills were supposed to go out in July 2025 and be due in August 2025, but they have been delayed due to previously mentioned technical difficulties. The technical difficulties have been corrected enough to finally mail the tax bills. Please note that pursuant to new legislation, the 2025 first installment tax bill that would be due in March 2026 will be pushed back by one month and will likely be due in April 2026.

Visit the Cook County Treasurer’s Website to view and pay your property tax bill using your address or property tax identification number (PIN), which can be found on your tax bill (e.g. 00-00-000-000-0000).

If you have any questions regarding your second installment property tax bill or are interested in filing an appeal to lower your property tax assessment, please do not hesitate to reach out to us.