Child Support Resources

Determining Child Support in Illinois

Olivia Long, Founder & Principal Attorney at O. Long Law, LLC
Olivia Long
January 7, 2025

Divorce or separation is one of the toughest things a family can go through, especially when kids are involved. Parents want to do what's best for their children, but it's not always clear what that looks like when it comes to child support. This guide will outline some of the most pressing questions about child support, offering a closer look at the factors involved and the steps required to navigate this critical and often complex process.

What Does Child Support Cover?

Child support in Illinois is intended to address a child's basic needs, including:

Food and Nutrition: Ensuring children have access to healthy meals and snacks.

Clothing: Providing appropriate seasonal and school clothing.

Housing: Contributing to rent, mortgage payments, and utility bills.

Healthcare: Covering health insurance premiums, and medical or dental expenses.

Education: Including tuition (for public or private schools) and school supplies.

What Child Support Does Not Cover

While child support covers many essential expenses, it does not include everything:

Extracurricular Activities: Sports, arts, and other enrichment programs are often considered outside the scope of basic support.

College Costs: Child support typically ends before college tuition becomes a factor unless explicitly addressed by the court.

Luxury Items: High-end electronics, designer clothing, and non-essential purchases are not covered.

How Is Child Support Calculated in Illinois?

Illinois uses an income shares model to calculate child support. This model accounts for both parents' financial contributions and allocates a proportion of their combined income toward the child's needs.

Determining Net Income: Gross income is adjusted for taxes, health insurance premiums, and other mandatory deductions.

Applying the Income Shares Schedule: Illinois provides a comprehensive schedule that dictates the total child support obligation based on the combined net income of both parents and the number of children involved. If the combined net income is $100,000 annually and there are two children, the schedule might indicate a total obligation of $20,000 per year.

Factoring in Parenting Time: Shared custody arrangements further complicate the calculation. If each parent has the child for 146 or more overnights per year, the basic child support obligation is multiplied by 1.5 to account for shared care.

Adjustments for Extraordinary Expenses: The court can adjust the standard calculation to account for specific needs, such as private school tuition or ongoing medical treatments for a child with special needs.

The Complexity of Child Support

Child support in Illinois is far from simple. Even what might seem like a simple calculation can involve multiple layers of decision-making and analysis. Every element of the process requires careful attention to detail to ensure that the child support arrangement is equitable.

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