The Illinois Department of Revenue (DOR) May 29 announced Cook County’s 2024 property assessment equalization factor, also called the “multiplier,” for property tax purposes. The equalization factor is 3.0355. This multiplier is applied to bring the county’s property assessments to the legally mandated level of 33 1/3 percent of market value. [Ill. Dep’t of Revenue, Press Release, 05/29/25]
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