The second installment of 2024 Cook County property tax bills are due Dec. 15, with bills beginning to be mailed Nov. 14, county officials announced Friday — months after the bills are typically sent.

The county conducted a “critical overhaul” of its property tax computer system, causing an extensive delay to the county’s property tax timeline, according to a statement from Cook County Board President Toni Preckwinkle’s office.

Second installment bills are typically mailed in July, with a due date in August.

Under a state law passed last month, Cook County’s first installment of the 2025 property tax bill will be due by April 1 at the earliest, which is about a month later than usual.

Preckwinkle’s office, which has “no statutory role in the administration of the tax bills,” has been m

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