Cook County property taxes in 2025 are due in two installments:
- The first installment is due by March 4, 2025. This installment is typically 55% of the previous year's total tax amount.
- The second installment is generally due August 1, but for 2025, due to delays in mailing caused by a transition to a new tax system, the second installment due date will be delayed at least until September 1, 2025, or possibly later.
These dates reflect the typical schedule and the special delay situation for 2025 caused by system upgrades and processing issues.
