Custody in Montana.
The starting point the law actually sets, what the judge has to weigh, and the deadlines that catch people out.
See a different stateMontana
There is no presumption of shared decision-making and no presumption of equal residential time. MCA § 40-4-212(1) simply says "The court shall determine the parenting plan in accordance with the best interest of the child." The closest thing to a thumb on the scale is factor (l): "whether the child has frequent and continuing contact with both parents, which is considered to be in the child's best interests unless the court determines, after a hearing, that contact with a parent would be detrimental to the child's best interests." That is a statement that contact is good for children — not a statement that the time must be split down the middle, and not a presumption about decision-making authority. Montana does have rebuttable presumptions in § 40-4-212(4), but they are about vexatious filings, not about who gets the children.
Use the state’s own words
Montana has removed "custody" and "visitation" from its decrees. The governing document is a "parenting plan," and the pieces of it have their own names: "parenting functions," a "residential schedule," and "parental decisionmaking authority" (MCA § 40-4-234). Montana will label one parent a "custodian" only as a technicality: § 40-4-234(2)(a) allows "designation of a parent as custodian of the child, solely for the purposes of all other state and federal statutes that require a designation or determination of custody, but the designation may not affect either parent's rights and responsibilities under the parenting plan." If you file asking for "custody," you are speaking a language the statute has retired.
How Montana decides
Decisions against where the child lives
Montana does not split them into "legal" and "physical" custody at all. Instead a final parenting plan may include, under MCA § 40-4-234(2), "a residential schedule specifying the periods of time during which the child will reside with each parent, including provisions for holidays, birthdays of family members, vacations, and other special occasions" (§ 40-4-234(2)(c)) and separately "allocation of parental decisionmaking authority regarding the child's: (i) education; (ii) spiritual development; and (iii) health care and physical growth" (§ 40-4-234(2)(h)). Under § 40-4-234(5), "Each parent may make decisions regarding the day-to-day care and control of the child while the child is residing with that parent, and either parent may make emergency decisions affecting the child's safety or health."
What the judge must weigh
MCA § 40-4-212(1) requires the court to consider all relevant parenting factors, which may include but are not limited to: (a) the wishes of the child's parent or parents; (b) the wishes of the child; (c) the interaction and interrelationship of the child with the child's parent or parents and siblings and with any other person who significantly affects the child's best interest; (d) the child's adjustment to home, school, and community; (e) the mental and physical health of all individuals involved; (f) physical abuse or threat of physical abuse by one parent against the other parent or the child; (g) chemical dependency or chemical abuse on the part of either parent; (h) continuity and stability of care; (i) developmental needs of the child; (j) whether a parent has knowingly failed to pay birth-related costs that the parent is able to pay, which is considered to be not in the child's best interests; (k) whether a parent has knowingly failed to financially support a child that the parent is able to support, which is considered to be not in the child's best interests; (l) whether the child has frequent and continuing contact with both parents, which is considered to be in the child's best interests unless the court determines after a hearing that contact with a parent would be detrimental — and in making that determination the court shall consider evidence of physical abuse or threat of physical abuse by one parent against the other parent or the child, including whether a parent or other person residing in that parent's household has been convicted of any of the crimes listed in § 40-4-219(8)(b); and (m) adverse effects on the child resulting from continuous and vexatious parenting plan amendment actions. Section 40-4-212(2) adds that where a parent is in military service, the court may not determine the child's best interest based only on that service.
What the child wants
No age is set for the child's wishes generally — MCA § 40-4-212(1)(b) simply lists "the wishes of the child" as a factor, with no threshold. But Montana does name an age in one specific place. When a parent asks to AMEND an existing parenting plan, MCA § 40-4-219(1)(a)(iii) makes it a listed consideration whether "the child is 14 years of age or older and desires the amendment." So 14 matters for changing a plan, not for making the first one.
Where there has been violence or abuse
Montana does not create a general rebuttable presumption against a parent who has committed domestic violence. Abuse enters through several specific doors instead. MCA § 40-4-212(1)(f) makes "physical abuse or threat of physical abuse by one parent against the other parent or the child" a best-interest factor, and § 40-4-212(1)(l) requires the court to weigh that same evidence before assuming frequent contact is good. MCA § 40-4-219(8) creates a fast-moving protection: if a parent or another person living in that parent's household has been convicted of any of eleven listed crimes — including deliberate homicide, sexual assault, sexual intercourse without consent, incest, child sex trafficking, endangering the welfare of children, partner or family member assault, sexual abuse of children, and strangulation of a partner or family member — the other parent may file an objection to the current parenting order, and "If the parent who receives notice of objection fails to respond within 21 days, the parenting rights of that parent are suspended until further order of the court." If they do respond and object, a hearing must be held within 30 days. MCA § 40-4-301(2) also bars mediation from continuing where the court has reason to suspect abuse, unless each party gives written informed consent.
The paperwork and the people
The parenting plan
Yes, in every case, with no exception even for defaults. MCA § 40-4-234(1): "In every dissolution proceeding, proceeding for declaration of invalidity of marriage, parenting plan proceeding, or legal separation proceeding that involves a child, each parent or both parents jointly shall submit to the court, in good faith, a proposed final plan for parenting the child… A final parenting plan must be incorporated into any final decree or amended decree, including cases of dissolution by default." The statute lists what a plan may include: designation of a custodian for other-statute purposes only; designation of the legal residence of both parents and the child; the residential schedule; finances for the child's needs; other factors affecting physical and emotional health; a periodic review trigger; sanctions including contempt if a parent does not follow the plan; allocation of decisionmaking on education, spiritual development, and health care; a method other than court action for resolving future disputes; and the unique circumstances of the family. We did not confirm a single statewide official parenting-plan form; ask your district court clerk.
Mediation
Not mandatory. MCA § 40-4-301(1): "The district court may at any time consider the advisability of requiring the parties to a proceeding under this chapter to participate in the mediation of the case. Any party may request the court to order mediation." There is a firm domestic-violence protection in § 40-4-301(2): "Unless each of the parties provides written, informed consent, the court may not authorize or permit continuation of mediated negotiations if the court has reason to suspect that one of the parties or a child of a party has been physically, sexually, or emotionally abused by the other party. A mediation conducted under this subsection may be conducted by a mediator who is trained in mediating domestic violence cases." "Informed consent" is defined as "an educated, competent, and voluntary choice to enter into mediation."
If the court appoints someone to look into it
MCA § 40-4-215(1): "If a parent or a court-appointed third party requests, or if the court finds that a parenting proceeding is contested, the court may order an investigation and report concerning parenting arrangements for the child. The investigator may be the child's guardian ad litem or other professional considered appropriate by the court." The Department of Public Health and Human Services may not be ordered to do the investigation unless the requesting person receives cash assistance or food stamps and all reasonable payment options are exhausted. On cost: "The cost of the investigation and report must be paid according to the final order," while the cost of a parenting-education evaluation under § 40-4-215(2)(a) is paid by the state. Under § 40-4-215(2) the court decides what level of evaluation is needed, which may include parenting education, mediation under § 40-4-301, factfinding by the investigator, and psychological evaluation of the parties. The investigator must mail the report to counsel and to any unrepresented party at least 10 days before the hearing (§ 40-4-215(4)). A child aged 16 or older must consent before the investigator obtains records from the child's past providers, unless the court finds the child lacks capacity.
Moving away
What you must do before you move
Montana's rule is a motion, not just a notice. MCA § 40-4-217(1): "A parent who intends to change residence shall, unless precluded under 40-4-234, provide written notice to the other parent." Then § 40-4-217(2)(a): "If a parent's change in residence will significantly affect the child's contact with the other parent, the parent who intends to change residence shall, pursuant to 40-4-219, file a motion for amendment of the residential schedule and a proposed revised residential schedule with the court… The motion must be served personally or by certified mail on the other parent… not less than 30 days before the proposed change in residence." The notice is legally insufficient unless it contains this exact warning: "The relocation of the child may be permitted and the proposed revised residential schedule may be ordered by the court without further proceedings unless within 21 days you file a response and alternate revised residential schedule with the court and serve your response on the person proposing the move." The other parent has 21 days after service to respond with an alternate proposed schedule; "failure to file a response within the 21-day period constitutes acceptance of the proposed revised residential schedule" (§ 40-4-217(4)). There is no mileage trigger — the test is whether the move will significantly affect the child's contact with the other parent.
Later on
Changing the order
MCA § 40-4-219(1): "The court may in its discretion amend a prior parenting plan if it finds, upon the basis of facts that have arisen since the prior plan or that were unknown to the court at the time of entry of the prior plan, that a change has occurred in the circumstances of the child and that the amendment is necessary to serve the best interest of the child." In deciding how a proposed change would affect the child, the court weighs the § 40-4-212 factors and whether: the parents agree to the amendment; the child has been integrated into the petitioner's family with the parents' consent; the child is 14 or older and desires the amendment; or one parent has willfully and consistently refused to allow contact with the other parent or attempted to frustrate or deny it. Under § 40-4-219(3) the court "shall presume a parent is not acting in the child's best interest" if they have blocked contact that way. Under § 40-4-219(7), "Preference must be given to carrying out the parenting plan." There is no waiting period, but there is a cost to abusing the process: § 40-4-219(5) requires attorney fees and costs to be assessed against a party seeking frivolous or repeated amendment where the action is vexatious and constitutes harassment, and § 40-4-212(4) makes two situations presumptively vexatious — a parenting plan action brought within 6 months after a child support action against that parent, and a motion to amend brought without a good faith effort to comply with the existing plan or its dispute resolution provisions.
Two Montana-specific traps. First, a relocation is not something you announce — it is something you file. Under MCA § 40-4-217(2), if your move will significantly affect your child's contact with the other parent, you must file a motion to amend the residential schedule with a proposed revised schedule and serve it at least 30 days before you go, and the notice must carry the exact statutory warning language or it does not count. The flip side matters just as much: if you are the parent who receives that motion and you do nothing for 21 days, the statute treats your silence as acceptance of their proposed schedule. Second, Montana penalizes going back to court too readily. MCA § 40-4-212(4) presumes it is vexatious to bring a parenting plan action within 6 months after a child support action against you, or to move to amend a plan without first making a good faith effort to follow it — and § 40-4-219(5) requires the court to assess attorney fees against a party whose repeated filings amount to harassment. Try the dispute resolution process in your own plan first.
What we could not confirm
- We could not confirm the Montana statute that governs custody and parenting plans when the parents were never married and paternity has not been established. Montana's parentage law sits in Title 40, chapter 6, which we were not able to verify. The parenting plan process itself is open to a parent — MCA § 40-4-234(1) applies to any "parenting plan proceeding" — but an unmarried father will generally need his parentage established first. Ask the clerk of your district court how to open a parentage and parenting plan case together. We also could not confirm a statewide official parenting plan form; your district court will have one.
Compare all fifty states
Where 50/50 really is the default, and the twenty-six states where nothing is presumed.
And the money side
How Montana calculates child support, and the overnight number that changes it.