Child support helps parents pay for housing, childcare, education and extracurriculars, and other child-related expenses. Illinois courts use an Income Shares Model to calculate child support payments. This model uses both spouses’ net incomes to determine a child support payment amount that provides the needed financial support without overburdening the paying parent. However, determining child support is not always as straightforward as it may seem. One situation that can make child support calculations more complicated is a parent’s unemployment.