New Mexico Custody and Parenting Plans

New Mexico uses the terms “custody” and “timesharing” in its family law framework. The state has a strong presumption in favor of joint custody, and every case involving minor children requires a parenting plan that details how parents will share time, responsibility, and decision-making. Understanding how New Mexico courts approach custody — and what must go into a parenting plan — is critical for any parent going through a divorce or custody proceeding.

For a national overview of custody law, see our guide on child custody laws explained.

Types of Custody in New Mexico

New Mexico law distinguishes between legal custody and physical custody:

Legal custody refers to the right to make major decisions about the child’s life, including education, healthcare, and religious upbringing. It can be joint (shared) or sole (awarded to one parent).

Physical custody refers to where the child lives on a day-to-day basis. It can also be joint (the child spends substantial time with each parent) or sole (the child primarily lives with one parent, and the other has timesharing).

In most New Mexico cases, the court awards joint legal custody. Joint physical custody is also common, though the exact schedule depends on the circumstances.

The Joint Custody Presumption

Under NMSA 40-4-9.1, New Mexico law establishes a presumption that joint custody is in the best interest of the child. This means the court starts from the assumption that both parents should share custody — and the burden falls on the parent opposing joint custody to show why it would not serve the child’s interests.

The presumption applies to both legal and physical custody. However, it is rebuttable. The court will not award joint custody when:

• There is evidence of domestic violence by one parent (discussed in detail below)
• One parent has a history of substance abuse that affects their ability to care for the child
• The parents are unable to cooperate to the degree required for joint custody to function
• Joint custody would not serve the child’s best interests based on the statutory factors

When joint custody is awarded, the court must also approve a parenting plan that specifies the details of the arrangement.

Parenting Plan Requirements

New Mexico law requires a parenting plan in every custody case. Under NMSA 40-4-9.1(B), the parenting plan must address:

Timesharing schedule. The plan must include a detailed schedule showing when the child will be with each parent. This covers the regular weekly schedule, holidays, school breaks, summer vacations, and special occasions. The schedule must be specific enough that both parents and third parties — such as schools and childcare providers — can determine which parent has the child on any given day.

Decision-making authority. The plan must specify how major decisions about the child’s education, healthcare, and religious training will be made. In joint custody arrangements, both parents typically share this authority and must consult with each other before making significant decisions.

Transportation arrangements. The plan should address how the child will travel between homes, including who provides transportation and where exchanges take place.

Communication provisions. The plan must describe how the child will maintain contact with each parent during the other parent’s timesharing period, and how the parents will communicate about the child’s needs.

Dispute resolution. The plan should include a process for resolving disagreements — such as mediation — before returning to court.

Parents can create a parenting plan together by agreement. If they cannot agree, the court will impose a plan based on the child’s best interests.

Best Interest Factors

When determining custody and approving a parenting plan, New Mexico courts apply the best interest of the child standard. Courts consider:

• The wishes of each parent regarding custody
• The wishes of the child, if the child is of sufficient age and maturity
• The interaction and relationship of the child with each parent, siblings, and other significant people
• The child’s adjustment to their home, school, and community
• The mental and physical health of all individuals involved
• Each parent’s willingness to foster the child’s relationship with the other parent
• The history of involvement each parent has had in caring for the child
• Any evidence of domestic abuse or child abuse by either parent
• The distance between the parents’ homes

No single factor is automatically dispositive. The court weighs all factors together.

For a broader discussion of how courts determine custody, see our article on how child custody is determined.

The Domestic Violence Presumption

New Mexico takes domestic violence very seriously in custody proceedings. Under NMSA 40-4-9.1(A), if the court finds that one parent has committed domestic abuse, there is a rebuttable presumption that joint custody and unsupervised timesharing with the abusive parent is not in the child’s best interest.

This presumption applies when there is a finding of domestic abuse — not merely an allegation. The court considers protective orders, criminal convictions, and evidence presented during the custody proceeding (testimony, police reports, and medical records).

The abusive parent can overcome the presumption by showing completion of a domestic violence treatment program, that the abuse is unlikely to recur, and that joint custody or unsupervised timesharing would still serve the child’s best interests. If the court denies joint custody based on domestic violence, it may award sole custody to the non-abusive parent and grant the abusive parent supervised timesharing.

Relocation Provisions

When a parent with custody or significant timesharing wants to relocate with the child, New Mexico imposes notice and consent requirements. Under NMSA 40-4-9.1(J), a parent who intends to relocate the child’s residence must:

• Provide written notice to the other parent at least 30 days before the proposed move (or as soon as practicable if circumstances require a shorter notice period)
• Include specific information in the notice — the proposed new address, the reasons for the move, and a proposed revised timesharing schedule
• Obtain the other parent’s consent or, if the other parent objects, obtain court approval before relocating

If the non-relocating parent objects, the court holds a hearing and evaluates whether the relocation serves the child’s best interests. The court considers the reasons for and against the move, the quality of the child’s relationship with each parent, the impact on the timesharing schedule, the child’s ties to their current home and community, and the child’s age.

The parent seeking to relocate generally bears the burden of showing that the move is in the child’s best interest or, at minimum, that the move is made in good faith and a revised schedule can preserve the child’s relationship with both parents.

For more on relocation in custody cases, see our article on relocation and custody.

Mediation

New Mexico courts strongly encourage — and in some counties require — mediation before contested custody issues go to trial. Mediation involves a neutral third party who helps the parents negotiate a parenting plan.

Mediation offers lower cost, faster resolution, greater parental control, and reduced conflict compared to litigation. It is not binding — if the parents cannot reach an agreement, the case proceeds to a hearing or trial. However, courts take note of each parent’s willingness to participate in good faith.

Some New Mexico judicial districts offer court-connected mediation programs at reduced or no cost. In other districts, the parents select and pay for a private mediator.

For more on the mediation process, see our article on custody mediation.

The Child’s Preference

New Mexico courts may consider the child’s preference when the child is of sufficient age and maturity to express a meaningful opinion. There is no specific statutory age — the court evaluates the child’s maturity and whether the preference reflects genuine wishes rather than coaching by a parent.

In practice, courts give more weight to the preferences of older teenagers than younger children. However, the child’s preference is never the sole determining factor — the court always considers the full range of best interest factors.

Courts typically hear the child’s preference through an in camera interview (a private meeting between the judge and the child) or through the report of a guardian ad litem or custody evaluator.

For more on how a child’s preference factors into custody decisions, see our article on what age can a child choose custody.

Modifying a Custody Order

A custody order or parenting plan can be modified after it is entered, but only if there has been a material and substantial change in circumstances since the original order. The parent requesting the modification must prove both the changed circumstances and that the modification serves the child’s best interests.

Common grounds for modification include a parent’s relocation, a significant change in work schedule or living situation, the child’s changing needs, evidence of substance abuse or domestic violence, and a parent’s persistent failure to comply with the existing plan.

For more on modifying custody, see our guide on how to modify a custody order.

What to Do Next

If you are facing a custody case in New Mexico, take these steps:

1. Understand the joint custody presumption. New Mexico presumes joint custody is in the child’s best interest. If you believe sole custody is appropriate, be prepared to present specific evidence showing why joint custody would not serve your child.
2. Draft a detailed parenting plan. Start thinking about what schedule works best for your child — not just what is convenient for you. Courts favor parents who focus on the child’s needs.
3. Document your involvement. Keep records of your participation in the child’s daily life — school events, medical appointments, extracurricular activities, and day-to-day caregiving.
4. Consider mediation. Mediation is faster, less expensive, and less adversarial than litigation. It also gives you more control over the outcome.
5. Consult a New Mexico family law attorney. Custody decisions affect your daily life and your child’s well-being for years. Schedule a free consultation to discuss your situation and develop a strategy that protects your parental rights.

Frequently Asked Questions

Does New Mexico favor mothers in custody cases?

No. New Mexico law does not favor one parent over the other based on gender. The court evaluates custody based on the child’s best interests, and the joint custody presumption applies equally to both parents. Both mothers and fathers have equal standing in custody proceedings.

At what age can a child choose which parent to live with in New Mexico?

There is no specific age in New Mexico statute. The court considers the child’s preference when the child is mature enough to express a meaningful, informed opinion. In practice, courts give increasing weight to the child’s wishes as the child enters their teenage years, but the preference is never the sole factor.

What happens if one parent wants to move out of state?

The relocating parent must provide the other parent with at least 30 days’ written notice and either obtain consent or court approval. If the non-relocating parent objects, the court holds a hearing to determine whether the move serves the child’s best interests and whether a workable revised timesharing schedule is possible.

Can a parenting plan be changed after the divorce?

Yes, but only if there has been a material and substantial change in circumstances. The parent requesting the change must show that the modification serves the child’s best interests. Routine disagreements about the existing plan do not justify a modification.

Is mediation required in New Mexico custody cases?

It depends on the judicial district. Some New Mexico courts require mediation before allowing contested custody matters to proceed to trial. Even when mediation is not mandatory, courts strongly encourage it as a first step. Mediation gives parents more control over the outcome and tends to produce agreements that both parties are more likely to follow.