Illinois Child Custody Laws (2026): Allocation of Parental Responsibilities and Your Rights
Illinois Child Custody Laws (2026): Allocation of Parental Responsibilities and Your Rights
Illinois courts decide child custody by the best interests of the child, using the state's own framework of "allocation of parental responsibilities" and "parenting time" since the 2016 Illinois Marriage and Dissolution of Marriage Act reform. There is no statutory presumption favoring joint allocation or any particular parenting-time split.
How does Illinois decide child custody?
Illinois courts allocate parental responsibilities under the best interests of the child standard set out in the Illinois Marriage and Dissolution of Marriage Act (IMDMA), codified at 750 ILCS 5/602.5 and 5/602.7. The Circuit Court in the county where the child resides has jurisdiction. Judges evaluate the totality of the family's circumstances, with separate statutory factor lists for significant decision-making authority and for parenting time. The standard is entirely child-centered: there is no automatic presumption for either parent, for joint allocation, or for any particular time-sharing percentage.
Illinois overhauled its custody language on January 1, 2016. Courts no longer issue "custody" or "visitation" orders. Instead, every final parenting order addresses two distinct issues: who has the authority to make significant decisions about the child's life (the allocation of parental responsibilities), and how parenting time is divided between the parents.
Types of custody in Illinois
Decision-making authority under Illinois law is called the allocation of parental responsibilities. The court can allocate all significant decision-making to one parent (sole allocation) or divide it between both parents (joint allocation). Significant decisions typically involve education, health care, extracurricular activities, and religious upbringing.
Parenting time replaces physical custody and visitation. The schedule can be roughly equal, primary with one parent and reasonable time with the other, or any other arrangement that serves the child's best interests. Either parent can be awarded more or less parenting time regardless of how decision-making is allocated; the two components are determined separately.
When parents reach a written parenting plan agreement, the court generally approves it unless it is not in the child's best interests. If parents cannot agree, the court decides each component independently.
Does Illinois presume joint or 50/50 custody?
No. Illinois has no statutory presumption of joint allocation of parental responsibilities, and no presumption of equal parenting time. Under 750 ILCS 5/602.5 and 5/602.7, every decision is made on a case-by-case basis under the best interests standard.
This distinguishes Illinois from states like Kentucky, Arkansas, Florida, and Oklahoma, which enacted rebuttable presumptions of equal or joint custody in recent years. Illinois courts may absolutely award joint decision-making and equal parenting time, but neither outcome is presumed at the start of a case. A parent advocating for a particular allocation must demonstrate that it serves the child's best interests based on the enumerated factors.
The law is also clear that neither gender is favored. The former tender-years doctrine (which presumed mothers were better primary caregivers for young children) was abolished. Illinois courts must consider parents equally regardless of sex.
The best interests factors Illinois courts weigh
For significant decision-making (750 ILCS 5/602.5), courts consider the parents' wishes; the child's wishes (given appropriate weight for age and maturity); the child's adjustment to home, school, and community; the mental and physical health of all parties; the child's needs; the distance between the parents' homes and the practicality of a shared schedule; the willingness of each parent to facilitate a close and continuing relationship between the child and the other parent; any prior agreement or course of conduct between the parties; and any history of abuse or domestic violence.
For parenting time (750 ILCS 5/602.7), courts apply a related but distinct list that also weighs the caretaking functions each parent performed in the 24 months before the proceedings (or since the child's birth if younger), the child's activities and community ties, whether restriction of parenting time is appropriate, and the physical/mental health of the parties. The two-year caretaking-history factor gives real weight to the parent who has been the primary day-to-day caregiver.
Judges may also consider any other relevant factor the court expressly finds to be in the child's best interests.
Relocation: moving with your child in Illinois
Illinois has a specific relocation statute at 750 ILCS 5/609.2. A parent who has a majority or equal share of parenting time and wishes to relocate must give the other parent at least 60 days advance written notice. The notice must include the intended new address, the proposed move date, and, if known, the duration of the relocation.
If the non-relocating parent does not object in writing within 21 days, the court may approve the relocation. If the non-relocating parent objects, the relocating parent must petition the court for permission. The judge then applies a best-interests analysis, weighing the reasons for the move, the impact on the child's relationship with the non-relocating parent, the practicality of maintaining the parenting schedule, and the child's preferences among other factors.
Relocation is treated as a substantial change in circumstances under 750 ILCS 5/610.5, which means it can open the door to modifying the existing allocation order.
Changing a custody order (modification)
Illinois law at 750 ILCS 5/610.5 sets a meaningful stability barrier. A parent cannot seek modification of an allocation of parental responsibilities within two years of the most recent order unless the court finds that the child's present environment endangers their physical, mental, moral, or emotional health. This two-year bar is intended to reduce litigation and protect children from repeated disruptions.
After two years, a modification requires proof of a substantial change in circumstances affecting the child's welfare, plus a showing that the proposed modification serves the child's best interests under the same statutory factors. Examples of qualifying changes include a significant shift in either parent's work schedule, a relocation, a change in the child's needs, documented evidence of abuse, or a meaningful change in the child's relationship with a parent.
Parenting time (time-sharing) can be modified on a lower showing of changed circumstances than decision-making allocation can be. If you also have a child support order in Illinois, changes in parenting time often affect the support calculation; see our Illinois child support laws page for details.
If you are facing a custody case in Illinois
A few practical steps make a meaningful difference in Illinois allocation proceedings:
Prepare a detailed parenting plan. Illinois courts expect parents to submit a parenting plan within 120 days of filing. Your plan should address parenting-time schedules, holiday rotations, decision-making procedures, and how disputes will be resolved. A thoughtful, child-focused plan signals cooperation to the court.
Document your caretaking role. Because Illinois courts look closely at the prior 24 months of caretaking functions, keep records of school pickups, medical appointments, homework, sports practices, and other daily involvement. Text messages, calendars, and school or healthcare records all support your case.
Focus on the child's needs, not the conflict. Courts respond poorly to parents who appear more focused on winning against the other parent than on what is best for their child. Demonstrating that you support the child's relationship with the other parent is one of the explicit statutory factors.
Consider mediation. Many Illinois circuits require or strongly encourage mediation before a contested allocation hearing. Mediation often produces more flexible, workable parenting plans than court orders.
Consult a licensed family-law attorney if the other parent contests the allocation, if there is a history of domestic violence or abuse, or if relocation is involved.
This article is general legal information, not legal advice. Child custody law varies by state and turns on the specific facts of each family. For advice about your situation, consult a licensed family-law attorney in Illinois.
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Sources
- 750 ILCS 5/602.5 (Allocation of significant decision-making responsibilities) - Illinois General Assembly
- 750 ILCS 5/602.7 (Allocation of parenting time) - Illinois General Assembly
- 750 ILCS 5/609.2 (Relocation) - Illinois General Assembly
- 750 ILCS 5/610.5 (Modification) - Illinois General Assembly
- 750 ILCS 36 (UCCJEA) - Illinois General Assembly
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