America's Property Tax Advisor

Cook County Property Tax Collections Hit Record High


Once again, total property taxes billed for districts in Cook County, Illinois have broken previous records from $14.4 billion last year to $14.9 billion this year.


Countywide, tax bills will increase about 3.7% on average for both commercial and residential properties. However, there are wide variations by region and property type. The 2018 second installment property tax bill payments are due August 1, 2019


Countywide Changes


Average 2018 assessed values for commercial properties have changed across the entire county, as shown in the chart below.



2018 Estimated Average
Assessed Value

% Change from 2017

City of Chicago - North



City of Chicago - Central



City of Chicago - South



North & Northwest Suburbs



South & West Suburbs




Tax Shift in Chicago


Under Cook County’s triennial reassessment system, the City of Chicago was reassessed for Tax Year 2018. The reassessment resulted in an increase in assessed value of approximately 16.4% for the City as a whole. This increase was offset by both a 1.8% decrease in the state-issued equalization factor.


With the reassessment, property values in the North and Central areas of Chicago have increased, shifting the property tax burden away from the Southside of the City. The highest increase in equalized assessed value occurred in West Township at 17.8%. The smallest increase was 3.3% in Hyde Park Township.


Tax Rates


Property owners in the City of Chicago have basically the same tax rate with the exception of properties in special districts such as Special Service Areas, Expanded Mental Health Services Districts, and the South Cook Mosquito Abatement District. Because all properties have the same tax rate, more or less, the variability in Chicago tax bills is usually due to differences in taxable value. The general tax rate for the City of Chicago decreased 6.6% this year.


In general, City of Chicago property owners with taxable value increases of greater than 6.6% may see their tax bills go up, while property owners with taxable value decreases, or increases less than 6.6% may see their tax bills go down.


Tax rates in suburban Cook County are much more variable than in the City of Chicago due to the larger number of taxing districts in the suburbs. The Southern and Western suburbs tend to have lower property values and higher tax rates, while the Northern suburbs tend to have higher property values and thus lower tax rates. Both regions have higher rates than the City of Chicago.


In addition to having different tax rates in different suburbs, taxpayers within the same suburb may pay different rates based on the specific taxing districts which provide their services. Each second installment tax bill will display the list of districts that contribute to a property’s final tax amount.