How to modify child custody and parenting time in Missouri

Sources last checked 4 November 2026. Information only, not legal advice. This page rests on four Missouri statutes read on the Missouri Revisor of Statutes site; we did not read any court decision, court form or court rule. Read what we could not confirm below.

The short version

Missouri treats changing custody and changing parenting time differently. To change a custody decree, RSMo 452.410 requires facts showing “a change has occurred in the circumstances of the child or his custodian” and that the change is “necessary to serve the best interests of the child”. For visitation (parenting time), RSMo 452.400 lets the court modify an order “whenever modification would serve the best interests of the child”. For changing child support or alimony instead, see modifying child support and alimony in Missouri.

What must be shown

• Changing custody (452.410). The court must have jurisdiction under section 452.745 and must find facts that arose since the earlier decree, or that the court did not know of then, showing a change in the circumstances of the child or the custodian. The modification must also be necessary to serve the child’s best interests.
• Changing visitation or parenting time (452.400). The text sets a best-interests standard and does not mention a change in circumstances or a waiting period. A court cannot restrict a parent’s visitation unless it finds the visitation would endanger the child’s physical health or impair the child’s emotional development.
• Joint custody. When either parent asks to modify joint legal or joint physical custody, the statute says “each party shall be entitled to a change of judge” under the Supreme Court’s rule.
• An annotation. The Revisor’s page notes Russell v. Russell, 210 S.W.3d 191 (Mo. banc 2007), saying the change in circumstances need not be substantial when custody is modified to accommodate changes in parenting-time scheduling. We did not read that decision.

How the court decides: best interests

• RSMo 452.375 sets a rebuttable presumption that an award of equal or approximately equal parenting time is in the child’s best interests. The presumption can be rebutted by a preponderance of the evidence, and the statute says it can also be rebutted if the parents agree on all custody issues or the court finds a pattern of domestic violence.
• The court weighs eight factors. They include each parent’s wishes and proposed plans, the child’s need for a “frequent, continuing and meaningful relationship with both parents”, the child’s interaction with family and others, which parent is more likely to allow contact with the other, adjustment to home, school and community, the health of everyone involved including any history of abuse, a parent’s intention to relocate the child’s principal residence, and the child’s own input free of coercion.
• The judgment must include written findings on those factors when the parents have not agreed. Any judgment providing for custody “shall include a specific written parenting plan”.
• The court may enter joint or sole custody in several forms, including joint legal with sole physical custody. Joint custody does not rule out child support.

If a parent wants to move

• Under RSMo 452.377, a relocation is a change in the child’s principal residence for ninety days or more. The parent who plans to move must give written notice by certified mail, return receipt requested, to anyone with custody or visitation rights, and the statute says “written notice shall be provided at least sixty days in advance” unless there are exigent circumstances. It must include the new address, the date, the reasons and a proposed revised schedule.
• A parent who objects must file a motion “within thirty days after receipt of such notice” with an affidavit stating the good-faith factual basis. The parent who wants to move must respond within fourteen days.
• “The party seeking to relocate shall have the burden of proving” that the move is in good faith and in the child’s best interest. Failing to give notice is a factor in modifying custody and can lead to an order to pay the other parent’s expenses and fees.

Before you file

• Court staff cannot give legal advice. See legal aid in Missouri for free or low-cost help.
• Forms, fees and local rules vary by county. Ask the circuit clerk in the county that handled your case what to file and what it costs. This page does not state a fee.

What we could not confirm

• Statute text. We read RSMo 452.410 (edition effective 28 August 2021), 452.400 (2016), 452.375 (2024) and 452.377 (2019) on the Revisor’s site through a tool that returns summaries and short quotes, not the full text. Later amendments were not checked.
• Case law. We read no court decision. We cannot say how Missouri courts apply the change-in-circumstances rule, whether they require it for parenting time, or what counts as a change.
• Jurisdiction and venue. We did not read RSMo 452.745 or any venue rule, so we cannot say which county or court to file in.
• Forms, fees and procedure. We did not find a Missouri form for this request, a filing fee, a service rule or a hearing timeline.
• Other sections. We did not read the rules on parenting-plan modification, grandparent visitation or third-party custody.

Spot something out of date? See our corrections or email hello@thecusp.app.

Sources

• Missouri Revisor of Statutes, RSMo 452.410, 452.400, 452.375 and 452.377 (revisor.mo.gov), read 4 November 2026