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Be alert for fraudulent messages or websites attempting to steal your banking information, login credentials, or credit card details. The Illinois Department of Revenue (IDOR) will never request personal or financial information via text message. To confirm official communications or contact details, always visit https://tax.illinois.gov.

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What is the tax rate for property taxes, and when do I have to pay my property taxes?

There is no set rate for property tax in Illinois. Your tax bill is based on two factors, the equalized assessed value (EAV) of your property, and the amount of money your local taxing districts need to operate during the coming year.

  • Most property is assessed at 33 1/3 percent of its fair market value. 
  • Farmland is assessed based on its ability to produce income (its agricultural economic value). A farm building is assessed at one-third of the value that it contributes to the farm’s productivity. ( Farm home sites and farm dwellings are assessed at one-third of their market value.)
  • Cook County uses a different system that assigns assessment levels to different classes of property. Assessment levels range from 10 percent of market value for residential property to 25 percent of market value for commercial property.
  • Other specific types of properties may qualify for a preferential assessment as permitted by law.

Contact your county treasurer for property tax payment due dates. The phone number can be found by searching online.

In most counties, property taxes are paid in two installments, usually June 1 and September 1. If the tax bills are mailed late (after May 1), the first installment is due 30 days after the date on your tax bill.

County boards may adopt an accelerated billing method by resolution or ordinance. Cook County and some other counties use this billing method. Under this system, the first installment of taxes is 55 percent of last year’s tax bill. This installment is mailed by January 31. In Cook County, the first installment is due by March 1. (Elsewhere, a county board may set a due date as late as June 1.) The second installment is prepared and mailed around June 30 and is for the balance of taxes due. The balance is calculated by subtracting the first installment from the total taxes due for the present year. The second installment is generally due August 1 or at a later date as set by the county.

Other Related Links

You may access additional information by searching the entire Illinois Department of Revenue website.

If you have additional inquiries, you may submit them on the Questions, Comments, or Requests form.