The Cook County Property Tax Extension Process: a Primer on Levies, Tax Caps, Tax Bills and the Effects of Tax Increment Financing Districts

September 7, 2011

The purpose of this report is to describe how property taxes are extended in Cook County, Illinois. It defines tax extension, explains the mechanics of calculating rate limits and tax caps, and describes the effects of Tax Increment Financing districts on the tax revenues of local governments. It also includes trend data on Equalized Assessed Value, tax rates, tax extensions, and TIF revenue. Finally, the report explains the difficulty of predicting changes to individual tax bills.

Read the press release for this report here.

Updated on September 7, 2011 to reflect current data.