Typically, Cook County 2nd installment tax bills are mailed in late June and due by August 1st. However, this year, they will be delayed due to a computer upgrade in the Assessor's office. However, they will still be out about a month earlier than last year.
As per the latest information from the County, the 2nd installment tax bills are now expected to be mailed by November 1st and due December 1st.