Property tax exemptions deadline is Sept. 11

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Property tax exemptions deadline is Sept. 11

September 02, 2020 - 22:41

Homeowners in Cook County have until Friday, Sept. 11, to apply for missing property tax exemptions on their 2019 second-installment property tax bills. 

By meeting this deadline, homeowners can receive corrected property tax bills by mail before the Oct. 1 deadline to pay without incurring penalties and interest.

The Cook County Assessor’s Office offered this information:

Homeowners can look at the bottom left corner of the second-installment property tax bill, available at, under the Tax Calculator section. If homeowners believe they are entitled to an exemption that is not listed, they can apply for a Certificate of Error by submitting an application and copies of supporting documentation online at or on paper, or in person. 

A full list of property tax exemptions administered by the assessor’s office is at

If homeowners apply for  a Certificate of Error after Sept. 11, they are responsible for paying the entirety of the second-installment tax bill to the Cook County Treasurer’s Office by Oct. 1. If the Certificate of Error application is granted, a refund for the difference will be issued.

To further assist homeowners, the Cook County Assessor’s Office is hosting a virtual meeting on how to apply for a Certificate of Error on Thursday, Sept. 10, at 6 p.m. that can be accessed on Facebook and YouTube.