The Best Interests of the Child: Factors Judges Consider in Deciding Custody

In every state, judges decide disputed child custody cases based on what's in the "best interests of the child." This legal standard is meant to prioritize a child's well-being, but it isn't a one-size-fits-all rule. Instead, state law gives judges a list of factors to apply to the specific facts of each family, such as the child's relationship to each parent and the child's need for stability. These specific factors vary from state to state, and typically include something like "and any other relevant factor."

Here are some examples of the most common factors that judges typically must take into account. Understanding what judges typically look for can help you anticipate how a judge might evaluate your situation and what evidence will matter most.

Understanding the Basics: Legal vs. Physical Custody

Before diving into specific factors judges consider, it helps to understand that custody is split into two distinct legal categories:

• Legal custody (decision-making authority): The right to make major, long-term decisions about the child's education, healthcare, and religious upbringing. Judges strongly favor parents having joint legal custody, but sometimes grant one parent sole legal custody.
• Physical custody (parenting time): Where the child actually lives on a day-to-day basis. One parent can have sole physical custody, or parents can share joint physical custody. If one parent has sole custody, the other parent will likely have visitation.

Some courts have dropped the words "custody" and "visitation" because they sound like property labels. Depending on where you live, you might see terms like "allocation of parental responsibilities" and "parenting time" instead.

The Shift Toward Equal Shared Parenting

In all states, judges are encouraged to structure custody arrangements so that both parents continue to have "frequent and continuing contact" with their child after divorce or separation whenever possible. Some states are taking it a step further and passing laws that create a statutory presumption of equal (50/50) shared parenting time. In these states, a judge automatically assumes that splitting time equally is best for the child.

In Florida, for example, equal time-sharing is presumed to be in the child's best interests. If a parent wants a different arrangement in Florida, that parent must prove by a preponderance of the evidence that equal sharing isn't appropriate. (Fla. Stat. § 61.13(2)(c) (2026).) Other states have adopted or are considering similar changes, reflecting a shift toward ensuring children maintain a strong bond with both parents after divorce.

Each Parent's Ability to Meet Children's Needs

The most basic part of the "best interests" standard is that custody decisions should serve the children's health, safety, and welfare. Judges will look at whether one or both parents can handle a child's special educational, medical, mental health, and other needs.

Children's Relationship With Both Parents

Many states have an explicit policy of encouraging frequent and continuing contact between children and their divorced or separated parents. In pursuit of that goal, judges will consider several factors related to the past and present parent-child relationships.

Parents' Willingness to Support Each Other’s Relationship With Their Children

Judges will look at the parents' history of cooperating—or not—with each other around their parenting schedule. For instance, judges might want to know things like whether one parent interferes with visitation in any way.

Judges will also look for evidence of each parent's willingness to foster a good relationship between their child and the other parent. Is one parent bad-mouthing the other in front of the kids? Does one parent tend to start arguments when picking up or dropping off the child with the other parent?

The more cooperative parent will usually have an edge in a custody dispute. And parents who are obviously trying to alienate a child from the other parent—or who just can't refrain from undermining the other parent's relationship with the kids—will learn that judges don’t look kindly on that type of behavior.

Parents' Relationships With Their Children Before Divorce

Judges will look at each parent's history of taking care of and spending time with their children on a day-to-day basis. Sometimes, parents who haven’t been much involved with their kids’ lives suddenly develop a strong desire to spend more time with the children once the marriage has ended.

In many cases, this desire is sincere, and a judge will respect it—especially if the parent has been dedicated to parenting during the separation period. But judges are also realistic and they will want to evaluate whether a parent is seeking custody primarily to gain leverage over the other parent or to reduce a child support obligation, rather than out of a genuine desire to spend more time with the child. A parent with little history of day-to-day caregiving will also likely need to demonstrate that they can take on the role.

When there’s clear evidence of child abuse or neglect, a judge will limit the abusive parent’s contact with the children. If judges do award visitation in these cases, it will usually be supervised and structured in a way to protect the children from future emotional or physical harm.

Domestic violence against the other parent is taken very seriously in custody decisions. In many states, judges apply a rebuttable presumption against granting custody (sole or joint) to a parent who has committed domestic violence. This means the abusive parent must prove that awarding them custody would still be in the child's best interests. To do so, they must refrain from further abusive behavior and they might also have to complete a batterer's intervention program. A growing number of states have expanded the definition of domestic violence to include coercive control, which is a pattern of behavior used to dominate, isolate, or intimidate a partner, even without physical violence.

Children's Need for Continuity and Stability

When it comes to children, judges are big on the status quo, because most of them believe that piling more change on top of the traumatic transition of divorce generally isn’t good for kids. Among other things, judges may look at the child's ties to the current school and community. So if you’re arguing that things are working fine, you’ve got a leg up on a spouse who’s arguing for a major change in the custody or visitation schedule.

Several other factors that judges consider are related to children's need for stability after divorce.

Each Parent's Living Situation

There’s a bit of a chicken-and-egg dilemma surrounding the issue of which parent gets the home in divorce and how that affects custody. The family home often goes to the parent who will have primary physical custody of the children (assuming that parent can afford to keep it), since staying in familiar surroundings provides stability and continuity. But the relationship can run the other way too, in that a judge may look favorably on awarding more parenting time to the parent who remains in the family home, precisely because that stability benefits the children.

Whether you are leaving or staying in the marital home, you'll need to prove that your current living situation would be a good place for the children to spend a lot of time if you want primary or shared custody. Don't expect to get that result if you're crashing in your best friend’s guest room while you get back on your feet after the divorce.

At the same time, most judges will try to avoid penalizing parents who can't afford a nice home with an ideal set-up for kids. The focus is on whether a parent can meet the child's basic needs, not which parent has the larger house. (It's also worth noting that child support in most states is calculated using income-based guidelines that take into account how much time the child spends with each parent, so a shared custody arrangement can affect child support amounts.)

How Far Apart the Parents Live From Each Other

The proximity of your home to the other parent may also factor into the judge’s custody decision. The closer you are to each other, the more likely it is that the judge will order a time-sharing plan that gives both parents significant time with the kids. When parents live in the same community, their children can continue with the same social, sports, and religious activities regardless of which parent they're staying with on which day. It's also less taxing on the children to go back and forth between parents who don't live far apart.

The Children's Preferences

Depending on the state and the children's maturity, judges may take the children's custody preferences into account, sometimes through a custody evaluator. Some states set a specific age (like 12 or 14) at which a child's preference must officially be considered, while other states focus on whether the child can express an opinion based on sound reasoning, not on parental manipulation or things like which parent allows more screen time.

Even when a judge must consider a child's preference, it isn't binding. A child's preference is just one custody factor among many for the judge to consider.

Does Age of the Child Matter in Custody Decisions?

The "tender years" doctrine—the idea that young children should stay with their mothers—is no longer recognized by law. Judges can, however, consider the child's age in the context of their specific needs. For example, a court will almost certainly not grant a father sole physical custody of a nursing infant if the mother is a fit parent. But this consideration is based on the biological needs of the child and not a presumption favoring the mother.

Does the Gender of the Parent Matter in Custody Decisions?

Judges are not allowed to give either parent preference based on gender, and gender-based custody presumptions are unlawful. While implicit bias may still exist in practice, it is legally impermissible everywhere.

Get Help With Your Child Custody Case

Custody decisions ultimately come down to finding an arrangement that allows children to maintain relationships with both of their parents while supporting their health, safety, and stability. If you have questions about the relevant law in your state and how it applies to your situation, talk to a local family law attorney.

Learn more about types of custody, how to create a custody agreement, and child support.