Illinois Custody Calculator
Understanding Illinois' overnight threshold for shared custody and how it affects child support calculations.
What This Means
Illinois uses overnight counts to determine shared parenting status:
- Below 146 overnights: Standard child support guidelines apply.
- 146+ overnights: Shared parenting adjustment applies, which typically results in a reduced support obligation.
146 overnights represents approximately 40% of the year. Illinois has one of the higher thresholds for shared custody among U.S. states.
Schedules That Meet Illinois' Threshold
| Schedule | Overnights | Meets 146? |
|---|---|---|
| 2-2-3 | ~182 (50%) | ✓ Yes |
| Week-on-week-off | ~182 (50%) | ✓ Yes |
| 4-3 | ~156 (43%) | ✓ Yes |
| EOW + 2 weeknight overnights | ~128 (35%) | ✗ No |
| Every other weekend only | ~52 (14%) | ✗ No |
Illinois Resources
This information is for educational purposes only and does not constitute legal advice. Consult with an Illinois family law attorney for guidance on your specific situation.
Frequently Asked Questions
How many overnights is shared custody in Illinois?
Illinois requires 146 overnights per year (approximately 40% of time) for shared parenting treatment in child support calculations.
Does Illinois require 50/50 for shared custody?
No, but Illinois has a higher threshold than many states. You need 146 overnights (40%) rather than a true 50/50 split.
What schedule meets the 146 overnight threshold in Illinois?
A 4-3 schedule provides approximately 156 overnights, just above the threshold. A 2-2-3 or week-on-week-off schedule easily qualifies with 182 overnights.
Calculate Your Illinois Custody Schedule
See exactly how many overnights your schedule provides and whether you meet Illinois' 146-night threshold.
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