Illinois Child Support Calculator
Calculate child support payments based on Illinois guidelines and compare with international standards
Parent Information
Illinois uses an “Income Shares” model which estimates the amount that would have been spent on children if the parents lived together, then divides this amount proportionally based on each parent’s income.
Support Calculation Results
International Comparison
Factors in Child Support Calculation
Both parents’ net incomes are considered. Illinois uses net income after deductions for taxes, Social Security, Medicare, and other mandatory deductions.
Support amounts increase with more children, but the percentage increase per child decreases. Illinois provides specific guidelines for 1-6+ children.
Overnights with the non-custodial parent affect support calculations. More overnights (shared parenting) typically reduce the support amount.
Work-related child care and health insurance costs are added to the basic support obligation and shared proportionally between parents.
Additional expenses for education, special needs, or extracurricular activities may be added to the support calculation.
Past-due support payments (arrears) are added to current obligations and must be paid in addition to regular support.
Disclaimer: This child support calculator illinois provides estimates based on standard Illinois guidelines. Actual court-ordered amounts may vary based on specific circumstances. This tool is for informational purposes only and does not constitute legal advice. Consult with a family law attorney for guidance on your specific situation.