How to Get Custody of a Child in Missouri: Filing, Plan, Hearing

To get custody of a child in Missouri, you file a petition in the circuit court of the county where the child lives, attach a detailed parenting plan, serve the other parent, and either reach an agreement or go to a contested hearing. Before you start, understand the ground you’re standing on: since August 28, 2023, Missouri law presumes that equal or approximately equal parenting time serves the child’s best interests.¹ Equal time is the default. A parent asking for more than that, or for sole custody, carries the burden of showing why a different arrangement would better serve the child.

The presumption can be overcome by a preponderance of the evidence tied to the statutory best-interest factors, by the parents’ own agreement on a different schedule, or by a court finding of a pattern of domestic violence.¹ If the judge departs from equal time, the order must include written findings explaining why.

Decide What Kind of Custody You’re Asking For

Missouri splits custody into two separate questions, and your petition should address both. Legal custody is the authority to make major decisions about education, health care, and welfare. Physical custody is where the child lives and how residential time is divided.¹ Each can be joint or sole, and you can mix them. Joint legal custody means both parents share decisions. Joint physical custody means each parent has significant residential time, though not necessarily a perfect 50/50 split. Sole custody is generally reserved for cases involving abuse, substance issues, or a parent who cannot participate in daily life.

The common outcome in Missouri is joint legal paired with joint physical custody. Ask for sole custody only if the facts support it; asking for more than the evidence will carry damages your credibility with the judge on everything else.

File the Petition in the Right Court

The petition goes to the circuit court of the county where the child lives. You’ll need identification for both parents, the child’s residence history, and information about any existing custody or child support orders involving the same child. Filing fees for domestic relations cases in Missouri typically run between $130 and $200 depending on the county and whether minor children are involved.

If you are asking for child support along with custody, complete Missouri’s Form 14. It’s a standardized worksheet that calculates each parent’s support obligation based on gross income, health insurance costs, and the parenting time split.² The number Form 14 produces is the “presumed” child support amount, and any deviation requires the judge to explain the reason in writing.

Many Missouri circuits, especially in metropolitan areas, require both parents to complete a parenting education class as a local court rule. Fees are modest, but skipping the class can delay your final hearing. Check the local rules in your circuit as soon as you file.

Draft a Parenting Plan the Judge Can Actually Use

Every custody case in Missouri must include a proposed parenting plan.³ You can submit one jointly with the other parent, or file your own. The deadline is 30 days after service of process or the filing of an entry of appearance, whichever comes first.

The plan needs real detail. At a minimum, include:

A specific residential schedule covering weekdays, weekends, summer, and school breaks.
Holiday allocation, including the child’s birthday, Mother’s Day, and Father’s Day, with annual rotation where applicable.
Decision-making authority over education, health care, and extracurriculars, and what happens when parents disagree.
A dispute resolution method, often mediation before returning to court.
Transportation and exchange logistics: where handoffs happen and who drives.

Many plans also include a right of first refusal clause, which requires a parent who will be away during their scheduled time to offer that time to the other parent before using a babysitter or relative. Missouri law doesn’t require it, but courts frequently include one, and it cuts down on friction over third-party childcare.

A vague plan invites the judge to fill in gaps on terms you may not like. Think through the practical realities, including communication rules between parents and how you’ll handle schedule changes.

Serve the Other Parent and Watch the Response Window

Once the court accepts your petition, the other parent must be formally notified through service of process, usually by a sheriff’s deputy or private process server. The respondent then has 30 days to file an answer.³ If they miss that deadline, you can ask the court for a default judgment granting your requested custody arrangement.

Default judgments are not automatic. The judge still reviews the petition and parenting plan to confirm the arrangement serves the child. But the respondent loses the ability to contest the terms, which is a serious disadvantage. If you’re on the receiving end of a petition, file at least a basic response within the 30 days to protect your position.

Ask for a Temporary Order While the Case Is Pending

Custody cases take months. Either parent can ask the court for a temporary order under RSMo 452.315 that sets an interim arrangement while the case is pending.⁴ Temporary orders can cover custody, visitation, child support, and restraining provisions where one parent poses a risk of harm.

Judges tend to maintain the status quo once a temporary schedule is working, so the parent who establishes a favorable interim arrangement has an advantage heading into the final hearing. File the motion early and support it with an affidavit laying out specific facts.

What the Judge Weighs If You Can’t Agree

When parents can’t agree, the court decides by evaluating eight best-interest factors. This isn’t a scorecard where winning more factors wins custody. A judge weighs them together, and a single factor, particularly domestic violence, can outweigh everything else.

The factors are: each parent’s wishes and the realism of their proposed plan; whether each parent can maintain a frequent, continuing, and meaningful relationship with the child and handle day-to-day responsibilities; the child’s existing relationships with parents, siblings, and other significant people; each parent’s willingness to support the child’s relationship with the other parent; the child’s adjustment to home, school, and community, with the specific note that homeschooling alone cannot be the sole basis for a custody decision; the mental and physical health of everyone involved, with heightened scrutiny and mandatory written findings where a parent has engaged in a pattern of domestic violence; any intent to relocate; and the unobstructed input of the child, free of coercion and manipulation.¹ There is no fixed age at which a child’s preference controls, but older and more mature children carry more weight.

The willingness factor catches many parents off guard. A parent who badmouths the other in front of the child, interferes with scheduled time, or coaches the child to reject the other parent loses ground, often badly. The statute uses “including, but not limited to,” so judges can weigh anything else relevant to the child’s welfare.

Guardian ad Litem

In contested cases, the judge may appoint a guardian ad litem to represent the child’s interests independently.⁵ The guardian is not your advocate or the other parent’s. Their job is to interview everyone involved, talk to the child when appropriate, investigate the home environment, and make recommendations to the court. They can call witnesses, cross-examine both parents, and subpoena records. Their recommendation isn’t binding, but it carries real weight because they are the only person in the courtroom whose sole loyalty is to the child.

The court sets the fee, and parents usually split it. In high-conflict cases, guardian ad litem costs can reach several thousand dollars. Ask the court about estimated fees early so you can plan.

If You Plan to Move With the Child

If you are the custodial parent and plan to move the child’s primary home for 90 days or more, Missouri’s relocation statute applies.⁶ You must send written notice by certified mail to the other parent at least 60 days before the move, including the new address (or at least the city), the new phone number, the move date, the reasons, and a proposed revised schedule. The other parent has 30 days after receiving the notice to file a motion opposing the move. Moving without proper notice can bring sanctions and a custody modification against you, so treat the procedural steps as seriously as the merits.

Changing a Custody Order Later

A final custody order isn’t permanent. Missouri allows modification when circumstances of the child or a parent have materially changed since the last order and the change serves the child’s best interests.⁷ The change must rest on facts that arose after the prior order or were unknown to the court at the time. There’s no mandatory waiting period, but the changed-circumstances bar is real. Being unhappy with the outcome is not enough. Grounds courts typically accept include a parent developing a substance abuse problem, a significant work schedule change that makes the current arrangement unworkable, the child’s evolving needs, or one parent’s repeated failure to follow the existing order. The modification process mirrors the original filing, and if you’re modifying a joint custody award, either parent is entitled to a change of judge.

1
Missouri Revisor of Statutes. Missouri Code 452.375 – Custody, Definitions
2
16th Circuit Court of Missouri. Form 14 – Calculation of Child Support Worksheet Instructions
3
Missouri Revisor of Statutes. Missouri Code 452.310 – Parenting Plan Requirements
4
Missouri Revisor of Statutes. Missouri Code 452.315 – Temporary Orders
5
Missouri Revisor of Statutes. Missouri Revised Statutes 452.423 – Guardian Ad Litem Appointed, When, Duties
6
Missouri Revisor of Statutes. Missouri Revised Statutes 452.377 – Relocation of Child by Parent
7
Missouri Revisor of Statutes. Missouri Revised Statutes 452.410 – Custody, Decree, Modification Of, When