Illinois Calculating Support PDF Details

The Illinois Calculating Support Form, modeled after the Federal Income Tax Form 1040 and accompanying instructions, helps individuals and their legal representatives determine the correct amount of child support to be paid in Illinois. This form is an important resource in family law cases where child support is being determined or modified. The instructions accompanying the form provide a step-by-step guide through the calculation process. The form can be used by either party in a case to calculate their own support obligations or those of the other party.

Before you complete illinois calculating support, you will need to learn more about the type of form you're going to use.

Form NameIllinois Calculating Support
Form Length1 pages
Fillable fields0
Avg. time to fill out15 sec
Other namesillinois high income child support 400000, illinois child support estimator, illinois calculating support, illinois cost of living increase for child support

Form Preview Example

State of Illinois

Department of Healthcare and Family Services

Calculating Child Support Obligation

To calculate a minimum child support order, fill in the blanks below and add or multiply as appropriate:


Non-Custodial Parent's Income



Gross Income from Employer



Other Income



Total Income


2.Deductions from Gross Income


Federal Income Tax Withholding



State Income Tax Withholding






Mandatory Retirement Deduction



Union Dues



Health/Hospitalization Insurance Premiums



Prior Support Orders Actually Paid



Total Deductions



Net Income



(Total #1 (Gross Income) MINUS Total #2 (Deductions)



Guidelines Percentage for number of children



(20%, 28%, 32%, 40%, 45%, 50%)



Amount of child support that will be due



(#3 multiplied by #4)


HFS WEB016 (N-6-10)

Watch Illinois Calculating Support Video Instruction

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