Illinois
How do I get a formal parenting plan in Illinois when there is no court order?
Quick answer
Many Illinois parents share time informally for years without a court order. That works until one parent decides to change the deal, and at that point only a formal parenting plan protects your time.
Last updated June 2026
Why an informal 50/50 schedule is risky in Illinois
If you never went to court, there is no order for anyone to enforce. An informal schedule, even one that has worked smoothly for years, can be changed by either parent at any time, and the police and the courts have nothing to hold the other parent to.
The flip side is that your history matters. Illinois courts pay close attention to how caretaking has actually been shared, so a long-running 50/50 arrangement is meaningful evidence of what is normal for your kids. The sooner you ask a court to formalize it, the stronger that status quo argument is.
How parenting plans work in Illinois
Illinois no longer uses the word custody in its statutes. Instead, cases are about allocation of parental responsibilities, which covers two things: significant decision-making (education, health, religion, activities) and parenting time (the actual schedule with the kids).
To start, a parent files a petition for allocation of parental responsibilities in the circuit court, generally in the county where the children live. After filing, each parent submits a proposed parenting plan laying out the schedule, holidays, transportation, and how decisions get made. If the parents agree on a plan, the judge will usually approve it and it becomes an enforceable court order.
What happens when parents disagree on the schedule
When parents propose conflicting plans, Illinois courts typically send them to mediation first to try to work out the parenting time dispute before a judge decides. Many disagreements settle there.
If mediation fails, the judge decides based on the best interests of the children. Factors include each parent's past involvement in caretaking, the children's adjustment to home and school, each parent's willingness to foster a relationship with the other parent, and the arrangement the family has actually been living under. A parent who has been genuinely hands-on and can document it is in a strong position to keep substantial time.
Steps to take right now
Keep living the schedule. Do not agree, in writing or in practice, to a reduced schedule while you sort things out, because the arrangement in place when you file can shape the outcome.
Document everything: keep a calendar of overnights, school pickups, doctor visits, and activities you handle, and save texts or emails showing the 50/50 arrangement both parents followed. Then file for allocation of parental responsibilities promptly. Filing is not an act of aggression, it is how you convert an informal understanding into rights a court will enforce.
Tools and resources
This page is general legal information, not legal advice, and does not create an attorney–client relationship. Laws and local rules vary and change. For advice about your situation, consult a licensed family-law attorney in your state.