Illinois Child Support Calculator
Calculate estimated child support payments based on Illinois guidelines using parents' incomes, parenting time, and additional expenses.
Published by:
isCalculator Editorial Team
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How to use this tool?
How to Use the Illinois Child Support Calculator
- Enter Monthly Gross Income for both Parent A and Parent B (in dollars). This is before taxes.
- Enter Parenting Time (days per year) for each parent. Total must be ≤ 365.
- Enter Number of Other Children from this relationship (0 if none).
- Enter Additional Monthly Expenses (e.g., health insurance, daycare) in dollars.
- Select the Support Obligor: who will pay? Choose Parent A, Parent B, or Both (calculates net transfer).
- Click Calculate Support. The result shows the estimated monthly payment and a breakdown.
Note: All monetary values are in US dollars. Parenting time must be between 0 and 365 days. The calculator uses a simplified Illinois guideline schedule.
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Frequently Asked Questions
Illinois uses the income shares model, combining both parents' incomes to determine a basic support obligation, then prorating based on each parent's income and parenting time.
Key factors include each parent's gross income, number of children, parenting time, and additional expenses like health insurance and daycare.
No, this calculator provides an estimate based on simplified guidelines. Actual support may vary based on court discretion and specific circumstances.
