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b2ap3_thumbnail_child-support-illinois.jpgEstablishing initial child support arrangements that adequately reflect the financial abilities of both parents can often be a challenge. Having one standardized system for determining child support is an important step toward equality in payments. Federal law requires a specific system, but does not require a uniform model for all states. Two primary standards have developed, as a result, in determining child support formulas: percentage of obligor income model and income shares model.

Illinois Obligor Income Model

Under current law, Illinois employs the lesser-used system, known as the percentage of obligor income model, because of its ease and simplicity. In this model, the income of the payor, or supporting parent, after taxes and other deductions, is taken into consideration, and a percentage of this income is set as the payment based upon the number of children to be supported. However, the more money and assets one possesses, the more difficult it is to determine fair payment, especially if the custodial parent has more income or assets than the payor parent.


Illinois child support, Naperville divorce lawyerDivorced or unmarried parents who are not their child(ren)’s primary caregiver are legally required to pay child support to help pay for their child(ren)’s living expenses. These payments are put toward necessities necessities such as food, clothing and shelter, but generally do not cover child care, health care bills, education and extra-curricular activities. In most cases, the courts require more support in order to contribute towards these additional expenses.

How Child Support is Calculated

In Illinois, a judge, typically, will calculate child support payments. Minimum amounts range from 20 percent of net income for one child to 50 percent of net income for six or more children. This means that if a parent does not live with a child(ren) full time, and nets $100,000 annually, he or she will be required to pay $20,000 a year in child support for one child, or at least $50,000 a year if he or she has six or more children.

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