The second installment of property taxes for the year 2025 is generally due on February 1, 2025, and becomes delinquent after April 10, 2025, if not paid by the close of business on that date. Penalties usually start accruing after April 10, 2025, including a 10% penalty plus additional administrative charges depending on the locality.

However, note that some counties may have different schedules—for example, McLean County has its second installment due on September 4, 2025, while Cook County's due date has historically been around August but may be subject to delay in 2025.

If you specify the county or area, the exact due date for the second installment of property taxes can be confirmed.