IL HB3982

Amends Illinois Marriage and Dissolution of Marriage Act to establish comprehensive child support guidelines based on combined parental net income rather than percentage-based formulas.

Defines gross income and net income calculations, including exclusions for means-tested benefits and specific tax deduction methods (standardized or individualized tax amounts).

Extends child support eligibility to children age 19 or younger still attending high school and adds civil unions to applicable proceedings.

Establishes minimum child support obligations of $40 per month per child (maximum $120 total) for parents at or below 75% of federal poverty guidelines, with rebuttable presumption of zero dollar orders for parents with no income.

Requires courts to consider multiple factors including child's needs, both parents' financial resources, standard of living, health needs, and allows deviation from guidelines with written findings; includes provisions for shared parenting, split care, health insurance, childcare, and extracurricular expenses.