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Child Support Calculator

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Illinois Child Support Calculator

One of the most common issues among divorcing parents is whether one parent would be ordered to pay child support to the other to help support their children.

We created this simple child support calculator to help you understand how child support in Illinois is measured. Enter a few details about your parental time allocation and each spouse’s monthly income to see an approximate amount that could be awarded in your situation. Please keep in mind that there are many factors that can affect child support awards that are not taken into account in this calculation, and the totals shown may not be accurate for your particular situation.

To get a thorough assessment of the factors in your divorce and financial situation that can influence the amount of child support you can receive or pay, contact our Chicago divorce lawyers for a free case review.

Illinois Child Support Calculator


Parent with majority physical custody: must be between 183 and 365.
ⓘ Common Child Custody Arrangements:
  • 50/50: 183
  • 60/40: 219
  • 70/30: 274
  • 80/20: 292
  • 4-3 schedule: 208

Gross Monthly Income


(Parent with majority physical custody)

Estimated Child Support Obligation

Factors that Can Affect Your Child Support Award

The number of children, the number of overnights every year, and each spouse’s income are all essential factors in almost any child support situation.

Some factors to think about are:

• Alimony (also known as spousal support)
• Support for children from a previous relationship
• Medical expenses
• Child-care expenses

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