Child Support & Maintenance

llinois child support generally ends at 18, or at high school graduation (no later than 19). What each parent has to file and what happens to arrears.

What a prenup in Illinois can cover, what makes one enforceable, when to start, what it costs, and the document checklist we give our own clients.

Less scandal, more spreadsheet. Why prenups went mainstream, and why deciding your own terms beats taking the state's.

Illinois just lowered the shared-parenting threshold from 146 overnights to 110 and replaced the all-or-nothing cliff with graduated adjustments. The new law also counts daytime parenting, changes the rules for low-income and incarcerated parents, and requires annual income disclosure. Here's what changes January 1, 2027 — and why existing orders don't update automatically.