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Illinois Child Support
Child Support in Illinois

Child support guidelines are statutory, based on a flat percentage of the income model based on net income. The percentage is based on the number of children in the family.

Either or both parents may be ordered to pay reasonable and necessary child support, without regard to marital fault or misconduct. If the official guidelines are not appropriate, the following factors are considered:

  • the financial resources and needs of the child;
  • the standard of living the child would have enjoyed if the marriage had not been dissolved;
  • the physical and emotional conditions and educational needs of the child; and
  • the financial resources, needs, and obligations of both the noncustodial and the custodial parent.

A child's health insurance payment may be included in child support.

The clerk of the court receives child support payments in Illinois.

Additional information may be obtained at 625 Illinois Compiled Statutes Annotated; Chapter 5, Sections 7-703 and 750 Illinois Compiled Statutes Annotated; Chapter 5, Sections 505, 505.2, and 507.

Illinois uses the percentage of income formula to determine child support. Based on the number of children requiring support, the percentage of income formula does not consider many details, and people claim this model is not exact.

Calculate Illinois Child Support

Extraordinary Expenses

Secondary education support is an extraordinary expense.

Child Support Enforcement

In Cook County, child support assistance is available...

by mail at:
The Division of Child Support Services
32 West Randolph Street, 10th Floor
Chicago, IL 60601

by fax at:

or by email at:
Child Support Services.

Illinois driver's licenses may be revoked if child support obligations are not met.

More information about Illinois Child Support Enforcement can be found at their website.


Child support continues until the child turns 18; "[h]owever, if the child will not graduate from high school until after attaining the age of 18, then the termination date shall be no earlier than the earlier of the date on which the child's high school graduation will occur or the date on which the child will attain the age of 19."

Deviation Factors

Private school tuition is considered a deviation factor.

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