The 2009 First Installment Real Estate Tax Bills for Cook County, Illinois have been mailed to taxpayers, and are due on Tuesday, March 2, 2010. The Illinois Legislature passed a law ordering the first installment tax bills to be calculated at 55 percent of the previous year’s total tax liability. In the past, the first installment was calculated at 50 percent of the previous year’s tax liability. Please pay your taxes directly to the Cook County Treasurer.

You may pay your taxes under the following methods:

  • By mail;
  • In person at the downtown Cook County Building;
  • At more than 370 Chase Banks throughout the Chicagoland area;
  • At more than 200 participating Community Banks (see for a list of participating banks); or
  • Make on online payment via the Cook County Treasurer’s website.