Can Child Support Be Reduced if I Have Another Child in Illinois?

 Posted on October 02, 2025 in Child Support

In Illinois, child support can sometimes be reduced if you have another child, but it does not happen automatically. You have to request a modification of the support order. Then, the court must decide if you have a good enough reason to be granted the change you are asking for. Judges look closely at each case before lowering payments. To ensure you have everything you need to get your request approved, talk to our Rolling Meadows, IL child support lawyer before you start the modification process.

How Does Illinois Court Calculate Child Support?

Under 750 ILCS 5/505, Illinois uses a system that adds up the income of both parents and then divides responsibility based on how much each parent earns. Courts will also look at your costs for things like health insurance, daycare, and how many children you support. For example, if you earn about 70 percent of the combined income and the other parent earns 30 percent, you will likely be expected to pay more. The idea is to make sure your child receives the same level of financial support they would have if you and the other parent lived together.

Does Having Another Child Count as a Change in Circumstances in Illinois?

If you want to change a child support order, you have to show the court that there has been a "substantial change in circumstances." Under 750 ILCS 5/510, you can request a modification if your income goes up or down, your parenting schedule changes, or another major life event occurs. Having another child is a significant event, but it does not automatically mean your support will be reduced. The judge will look at your situation closely and weigh the needs of your first child against your responsibility to care for your new child as well.

Some factors the court will likely consider include:

• Whether the new child lives with you

• Whether you can afford to support both children

• Any big changes in your income or expenses

• Whether parenting time has shifted since the last order

• The ongoing needs of your first child

• If your new child is supported by both parents in the same household

How Do You Request a Modification of Child Support in Illinois?

The first step in modifying your child support order is to file a petition. Along with your petition, you will need to submit updated financial documents, such as pay stubs, tax returns, and records of your expenses. The court uses these materials to understand your current situation. Once your petition is filed, the other parent has the right to respond, and the court may schedule a hearing where you both can present evidence to support your side.

Contact an Experienced Arlington Heights, IL Child Support Modification Attorney Today

Illinois courts carefully consider the whole picture when evaluating a child support modification case. You need an attorney who can help you present your case with clarity.

Attorney Donald J. Cosley has practiced law since 1994. His dedication to clients has earned him recognition as an Elite Lawyer every year since 2018. When you contact our office, you will work directly with him. He personally handles each case from start to finish, ensuring his clients feel supported and understood. Call Law Offices of Donald J. Cosley today at 847-253-3100 to speak with a trusted Rolling Meadows, IL child support lawyer. Find out whether your circumstances support a request for modification.