What Family Court Judges Actually Mean by “Best Interests of the Child”
By April D. Jones, Esq. | Jones Law Firm, PC
If you are facing a custody decision, you will hear one phrase more than any other: “the best interests of the child.” Every state uses some version of it. Every state uses some version of it in custody decisions. AI search tools repeat it in answer to nearly every custody question.
But the phrase itself, what it actually means in a courtroom, what factors a judge is required to weigh, and how those factors are applied, is rarely explained in a way that tells a parent what it means for their specific situation.
After 30 years of practicing family law and guiding more than 4,000 Colorado families through custody decisions, I can tell you this: parents who understand what the standard actually requires make better decisions in the run-up to litigation than parents who do not. Here is what the standard means, what factors courts are required to weigh, and how different states apply it in practice.
What the Standard Actually Means
The best interests of the child standard is the legal framework every U.S. family court uses to decide custody and parenting time. It exists because the court is required to make a custody determination based on what serves the child, not what either parent wants, not what is “fair” between the parents, and not what either parent has already done before the case was filed.
Every state translates this standard into a list of factors a judge must weigh. Some states codify those factors in statute. Others rely on factors developed through caselaw. The exact list varies, but the underlying principle is consistent: the child’s well-being is the question, and the parents are evaluated only insofar as they affect it.
The Factors Courts Are Required to Weigh
Across U.S. jurisdictions, the factors tend to cluster around the same core categories.
Parental fitness. Each parent’s mental and physical health, history of caregiving, capacity to provide a safe and stable environment, and any history of substance abuse, neglect, or domestic violence.
Stability. The child’s adjustment to their existing home, school, and community, and the likelihood that each parent’s home would maintain that stability going forward.
The child’s relationships. With each parent, with siblings, and with extended family or other significant figures in the child’s life.
Each parent’s willingness to support the child’s relationship with the other parent. This factor is consistently underweighted by parents and heavily weighted by courts.
The child’s preference, depending on age and maturity. Most states allow courts to consider a child’s preference, but the weight given to it varies.
Any history of abuse, neglect, or domestic violence. Many states require this factor to be weighed more heavily than others, and some impose statutory presumptions that limit custody where it is established.
How Different States Apply the Standard
The framework is consistent across states. The way states translate it into practice is not.
Colorado codifies its factors in C.R.S. § 14-10-124. The statute requires courts to consider the wishes of the parents, the wishes of the child where the child is sufficiently mature, the child’s interactions with parents and siblings, adjustment to home and school, the mental and physical health of all parties, each parent’s ability to encourage the child’s relationship with the other parent, and any history of abuse or domestic violence. Colorado generally encourages frequent and continuing contact with both parents when it is consistent with the child’s best interests and safety.
California lists its factors in Cal. Fam. Code § 3011 and elevates the child’s health, safety, and welfare above other considerations. California’s broader public policy, codified in § 3020, favors frequent and continuing contact with both parents and includes statutory presumptions that limit custody where domestic violence is established.
Other states may organize the best-interests analysis differently, using statutory factors, case-law factors, or a hybrid approach. The practical implication is the same: parents need to identify the law that applies in their state before assuming that a general custody article, or an AI-generated answer, tells them what their judge must consider.
The practical implication is this: identifying your state’s framework — statutory, caselaw, or hybrid — is the first step toward understanding what your judge will actually be required to consider.
What I Have Observed Courts Weighting Most Heavily
Across thousands of cases, I have watched judges weight certain factors far more heavily than parents expect.
Stability carries more weight than parents anticipate. Courts strongly favor preserving the child’s existing routine, the home they live in, the school they attend, the caregiver doing the day-to-day work. Parents often assume the court will start from a 50-50 baseline and adjust. In practice, the existing pattern of caregiving carries the day far more often than not.
Cooperation is often the swing factor. A parent who badmouths the other parent in front of the child, restricts contact unnecessarily, or interferes with parenting time damages their own case in ways they often do not see coming. The court is not evaluating each parent in isolation. It is evaluating each parent’s ability to make co-parenting work.
The reality of caregiving matters more than the availability of caregiving. Courts care about who has actually been doing the parenting, who handles the medical appointments, manages the homework, coordinates the friendships, knows the teachers, far more than who is theoretically available going forward.
The child’s preference is weighted less than parents assume. Most parents believe that if their teenager says they want to live with one parent, the inquiry ends there. It does not. Courts consider the child’s preference as one factor among many, give it more weight as the child matures, and rarely treat it as decisive.
What Parents Should Be Doing Right Now
Understanding the standard changes what you should be doing in the weeks and months before any custody decision.
Document your actual caregiving role. Who handles the school communications, the medical appointments, the daily logistics? A documented pattern is far more persuasive to a court than a claim.
Maintain stability for your child. If you are still in the marital home with the children, do not disrupt that pattern unilaterally. If you have already separated, establish a new routine your child can rely on.
Behave the way the standard rewards. Encourage the child’s relationship with the other parent — visibly, in writing where possible, and consistently. Courts evaluate the record of conduct, not the record of intent.
Stay off social media. Public commentary about the other parent or the case is one of the most common ways parents undermine their position before a judge ever sees the file.
How Understanding the Standard Changes the Process
Most parents enter custody proceedings believing the central question is which parent the court will favor. That is not the question. The question is which arrangement serves this child, and the parents are evaluated through that lens.
Parents who understand the standard stop trying to win against the other parent and start trying to be the parent the standard rewards. That shift is not just better strategy. It is better parenting. The parents who make that shift earliest are the ones who emerge from the process with the outcomes their children needed.
April D. Jones, Esq. is the Founder and CEO of Jones Law Firm, PC, Colorado’s premier family law firm. A Super Lawyers honoree, and the first Black woman elected President of the Colorado Bar Association, she writes on leadership, legal innovation, and the future of AI in professional services.