ORC 3109.04: Shared Parenting, Custody, and Best Interest Factors

Ohio Revised Code 3109.04 is the statute Ohio courts use to allocate parental rights and responsibilities for minor children. It governs both initial custody decisions and later modifications, in domestic relations and juvenile courts alike. Every decision under the statute turns on one standard: the best interest of the child. From that standard, the statute builds out the factors a judge must weigh, the two custody structures available, the requirements for a shared parenting plan, and the threshold a parent has to clear to change an existing order.

The Best Interest Factors a Judge Must Weigh

Division (F)(1) tells the court to consider “all relevant factors” when allocating parental rights. The list is not exhaustive, but the statute names specific considerations the judge has to work through:

Each parent’s wishes about the child’s care.
The child’s wishes, if the judge has interviewed the child in chambers under division (B).
The child’s relationships with each parent, siblings, and any other person who significantly affects the child’s life.
How well the child is adjusted to home, school, and community.
The mental and physical health of the child and everyone involved.
Which parent is more likely to honor and encourage court-ordered parenting time with the other parent.
Whether either parent is behind on child support.
Whether either parent, or anyone in their household, has been convicted of domestic violence under ORC 2919.25, a sexually oriented offense against a household member, or an offense that resulted in a child being abused or neglected.
Whether the residential parent has continuously and willfully denied the other parent’s court-ordered parenting time.
Whether either parent has moved or plans to move out of state or far enough away to disrupt the current arrangement.

No single factor controls. A domestic violence conviction, for instance, does not create a formal statutory presumption against custody, but it weighs heavily alongside everything else. Judges build the full picture from testimony, records, and sometimes expert evaluations before landing on a decision.¹

Sole Residential Parent or Shared Parenting

The statute creates two structures. Under division (A), if neither parent asks for shared parenting or no workable plan is filed, the court designates one parent as the sole residential parent and legal custodian. That parent holds primary decision-making authority over education, healthcare, and daily upbringing. The other parent gets scheduled parenting time.¹

Shared parenting is the alternative. Under a shared parenting decree, both parents share legal and physical responsibilities. That does not automatically mean a 50/50 time split. It means both parents keep meaningful authority over major decisions and both have scheduled residential time. To get a shared parenting decree, at least one parent has to file a shared parenting plan for the court to review and approve under division (D).¹

What a Shared Parenting Plan Has to Cover

A shared parenting plan is not a general promise to cooperate. Division (G) requires a detailed written plan that addresses the practical realities of two households raising the same child. At a minimum, it should spell out:

The residential schedule, including weekdays, weekends, and overnights.
How holidays, school breaks, and summer vacations are divided or alternated.
Decision-making authority over education, healthcare, extracurriculars, and religious upbringing, whether jointly or with one parent leading in specific areas.
How child support obligations are allocated between the parents.
A dispute resolution process, such as mediation before returning to court.

If neither parent files a plan the court can approve, or the court decides shared parenting is not in the children’s best interest, it defaults back to designating one sole residential parent.

How the Court Decides Whether Shared Parenting Works

When shared parenting is on the table, the judge applies the (F)(1) best interest factors and then adds the factors in division (F)(2). Those include the ability of the parents to cooperate and make joint decisions, the recommendation of any guardian ad litem, and whether either parent has ever been held in contempt for interfering with parenting time.¹

Two tools shape that analysis in contested cases. Under division (B), the court may interview the child privately about their wishes, and must do so if either parent requests it. The judge first decides whether the child has enough reasoning ability to express meaningful wishes. If not, the interview ends. If special circumstances make exploring the child’s preferences harmful, the court enters written findings explaining why and stops there. The interview happens in chambers with the child, the child’s attorney, the judge, and necessary court personnel. Parents’ attorneys may attend only at the judge’s discretion. Parents themselves are never in the room, so the child can speak without feeling pressured.¹

The other tool is a guardian ad litem. Under division (B)(2)(a), the court may appoint one whenever it interviews the child, and must appoint one if either parent files a motion asking for it. The guardian investigates the child’s circumstances through interviews with parents, teachers, and others; home visits; and record review. Under (F)(2)(e), the guardian’s recommendation on shared parenting is one of the factors the court must weigh. It is not binding, but judges lean on it because the guardian has usually spent more time inside the family’s situation than the court has.¹

Modifying an Existing Custody Order

Changing custody after the original decree is significantly harder than getting the initial order. Division (E)(1)(a) sets the threshold: the court cannot modify a prior decree unless it finds a change in circumstances has occurred since the decree was issued (or that facts existed at the time but were unknown to the court), and that modification is necessary to serve the child’s best interest.¹

Even when there is a change in circumstances, the current residential parent is presumed to stay in place. To overcome that presumption, the parent seeking the change has to prove one of three things:

The residential parent agrees to the change, or both parents under a shared parenting decree agree to change the residential parent designation.
The child, with the residential parent’s consent, has already been living with and integrated into the household of the parent asking to become the residential parent.
The advantages of changing the child’s environment outweigh the likely harm of the disruption.

Most contested modifications are fought on that third prong. The parent seeking the change carries the burden of showing the benefits are real and substantial, not marginal. Judges protect stability. A child doing reasonably well in the current arrangement is unlikely to be moved without strong evidence the new setup would be meaningfully better.

Modifying or Terminating a Shared Parenting Decree

Shared parenting decrees follow their own rules under division (E)(2). There are three paths for change:

Both parents can jointly agree to modify the terms of the shared parenting plan at any time. The court incorporates the changes into the decree unless it finds they are not in the children’s best interest.
The court can modify the plan on its own motion, or at one parent’s request, if the changes serve the children’s best interest.
The court can terminate the shared parenting decree entirely if shared parenting no longer serves the children’s best interest. Either parent can request termination, or the court can act on its own.

When a shared parenting decree is terminated, the court starts fresh. It proceeds as though no shared parenting decree ever existed and allocates parental rights under divisions (A), (B), and (C), typically naming one sole residential parent.¹

Where Parenting Time Schedules Come From

Section 3109.04 controls who holds custody and decision-making authority. It does not set the parenting time schedule itself. That schedule for the non-residential parent is governed by ORC 3109.051, which adds practical scheduling factors on top of the best-interest analysis: the geographic distance between the parents’ homes, work and school schedules, the child’s age, time with siblings, each parent’s willingness to reschedule missed time, and any history of abuse or neglect.²

The two statutes tie back together in one important way. Under 3109.04(F)(1)(i), willful and continuous denial of court-ordered parenting time is a factor the court considers in future custody decisions. A parent who repeatedly blocks the other parent’s time with the child is telling the court they are not prioritizing the child’s relationship with both parents, and that can matter in a later modification.¹

1
Ohio Legislative Service Commission. Ohio Revised Code 3109.04 – Allocating Parental Rights and Responsibilities for Care of Children – Shared Parenting
2
Ohio Legislative Service Commission. Ohio Revised Code 3109.051 – Parenting Time Rights