Illinois Child Support Calculator
Beta Estimate Only
This calculator provides rough estimates for informational purposes only. It is in beta and should not be relied upon as legal advice. Child support calculations involve many factors not captured here. Consult a licensed attorney or your state's child support agency for accurate calculations.
Illinois — Income Shares Model
Illinois switched to the Income Shares model in 2017. Both parents' net incomes are combined using standardized tax tables. The combined obligation from the schedule is split proportionally. Shared parenting time (146+ overnights) triggers a different calculation with a 1.5× multiplier.
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All income amounts should be monthly gross (before taxes) unless noted otherwise.
Before taxes. Include salary, bonuses, commissions, rental income, etc.
Before taxes. Include salary, bonuses, commissions, rental income, etc.
Children eligible for support in this case (1–6)
Monthly cost of adding children to health insurance
Work-related childcare, daycare, after-school care
≈ 183 / 183 overnights per year
Beta Estimate Only
This calculator provides rough estimates for informational purposes only. It is in beta and should not be relied upon as legal advice. Child support calculations involve many factors not captured here. Consult a licensed attorney or your state's child support agency for accurate calculations.
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