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Child Support in Illinois

How support is calculated, modified, and enforced — from guidelines to college expenses.

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When Does Child Support End in Illinois? (2026 Guide)

Child support in Illinois ends at age 18, or 19 if the child is still in high school. Learn about emancipation, college expenses under 750 ILCS 5/513, and disabled adult child support.

Antonio G. Jimenez, Esq.·15 min read

Guide

How to Use the Illinois Child Support Calculator in 2026: Income Shares Model Guide

Use the Illinois child support calculator to estimate payments under the income shares model. Filing fees $210-$388. Updated guidelines effective March 2025.

Antonio G. Jimenez, Esq.·16 min read

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