Shared Custody & Parenting Time in Illinois
Understand how overnights, holidays, and shared schedules affect Illinois child support — without the legalese.
How Illinois treats shared time
Illinois uses the cross-credit method. Shared-time credit becomes meaningful at approximately 146 overnights per year with the paying parent. Above that threshold, the cash transfer is reduced — but generally cannot fall below 25% of base support.
Significant overnights with the paying parent reduce the calculated transfer because direct care offsets cash support.
Worked example
Consider a Illinois family with $7,500 combined monthly income. As parenting time crosses 146 overnights/year, the cross-credit applies and the obligor's transfer typically drops by 15–35%, depending on the exact share of time.
Frequently asked questions
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