Frequently Asked Questions
How is child support calculated in Illinois?
Illinois uses the income shares model under 750 ILCS 5/505. Both parents' net incomes are combined, a basic support obligation is determined from statutory guidelines, and each parent pays their proportionate share. Adjustments apply for parenting time exceeding 146 overnights (40%).
What income counts for Illinois child support calculations?
Net income includes salary, wages, bonuses, commissions, self-employment income, rental income, and most other earnings. Courts can impute income if a parent is voluntarily unemployed or underemployed. Certain expenses like health insurance premiums and prior support obligations are deducted.
When can child support be modified in Illinois?
Under 750 ILCS 5/510, modification requires a substantial change in circumstances. Examples include 20%+ income change, job loss, disability, or significant changes in the child's needs. Support automatically continues until age 18 (or 19 if still in high school).
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