Illinois child support
Illinois Child Support Calculator
Estimate monthly child support using Illinois guidelines. Adjust both incomes, parenting time, and the number of children to see how each factor changes the amount.
Updated for 2026 Illinois guidelinesYour situation
Your estimate
Estimated monthly child support
$477/mo
paid by you to the other parent
A parenting time credit may apply at 146 or more overnights per year.
For an exact calculation, use the official Illinois child support calculator.
Estimate only. Not legal advice. Confirm current guidelines with the official Illinois child support agency.
How Illinois calculates child support
State-specific details including deviation factors, modification procedures, and enforcement rules are available through the official Illinois child support agency. Filing fees for divorce or custody proceedings in Illinois typically run $210 to $388. Family attorneys in Illinois generally charge $225 to $400 per hour.
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