Massachusetts Custody & Parenting Plans

Massachusetts custody law is governed by G.L. c. 208 § 31, which establishes the framework for how courts decide custody and parenting time. Whether you're filing for divorce or modifying an existing order, understanding how Massachusetts distinguishes between legal and physical custody—and how judges apply the best interest standard—is essential for building a parenting plan that works.

This guide walks you through the custody framework under Massachusetts General Laws, the factors courts weigh, what your parenting plan must include, how child support interacts with custody arrangements, and the steps for modifying orders after they're entered.

Types of Custody in Massachusetts

Massachusetts recognizes two distinct dimensions of custody, and each can be awarded as sole or shared:

Legal Custody

Legal custody determines who makes major decisions about the child's education, healthcare, religious upbringing, and extracurricular activities. Under § 31, the court presumes temporary shared legal custody when a divorce action is filed. A judge may award sole legal custody only after making written findings that shared legal custody would not serve the child's best interest.

• Shared legal custody: Both parents have equal authority to make major decisions about the child's welfare
• Sole legal custody: One parent holds exclusive decision-making power, typically granted when there is a history of domestic abuse, substance abuse, or an inability to cooperate

Physical Custody

Physical custody determines where the child lives and who provides daily care. Massachusetts does not presume any particular physical custody arrangement. Courts may order:

• Sole physical custody: The child lives primarily with one parent; the other parent receives parenting time
• Shared physical custody: The child splits time approximately equally between both parents

The distinction matters for child support calculations. Massachusetts uses different worksheet sections depending on whether the arrangement is standard (roughly two-thirds/one-third), shared (approximately equal), or split (each parent has primary residence of at least one child).

The Best Interest Standard

When deciding custody, Massachusetts judges focus on the best interest of the child. Under § 31, the statute establishes that the rights of parents are equal, and neither parent has a presumptive right to custody. The court considers all relevant facts, including:

• Whether either parent abuses alcohol or other drugs
• Whether either parent has deserted the child
• Whether the parties have a history of being able and willing to cooperate in matters concerning the child
• The child's relationship with each parent and adjustment to home, school, and community
• Each parent's capacity to provide a stable, nurturing environment
• The mental and physical health of all individuals involved
• The child's own wishes, if the child is of sufficient age and maturity

Important: Massachusetts does not automatically favor 50/50 custody. Judges evaluate each family's circumstances individually against the best interest standard.

Domestic Violence and Custody

Under § 31A, courts must consider evidence of past or present abuse toward a parent or child as a factor contrary to the child's best interest. If a parent has committed a “serious incident of abuse”—defined by cross-reference to the criminal code—there is a rebuttable presumption that it is not in the child's best interest to be placed in sole or shared custody with the abusive parent.

Survivors of domestic violence can also seek a 209A Abuse Prevention Order, which can include custody provisions, through the Probate and Family Court, District Court, or Boston Municipal Court. These protections are available regardless of marital status.

What Your Parenting Plan Must Address

Massachusetts requires a written parenting plan when either parent seeks shared legal or physical custody. Under § 31, any plan submitted must be “acceptable to the court” and cover the key areas of the child's life. A comprehensive Massachusetts parenting plan addresses:

• Physical custody schedule: Where the child resides on weekdays, weekends, and overnights
• Holiday and vacation schedule: Specific provisions for major holidays, school breaks, summer, and special occasions like birthdays
• Education decisions: School choice, tutoring, special education services, and extracurricular activity participation
• Healthcare decisions: Medical, dental, and mental health treatment authority and insurance coverage
• Religious upbringing: How decisions about religious education and observance are handled
• Transportation and exchanges: Who provides transportation and where custody exchanges occur
• Communication provisions: How parents communicate about the child and how the child contacts the non-custodial parent
• Dispute resolution: Mediation or other methods for resolving disagreements without returning to court
• Relocation provisions: Notice requirements and procedures if either parent intends to move

Shared Custody and the § 31 Presumption

One of the most significant aspects of Massachusetts custody law is the temporary shared legal custody presumption. When a divorce is filed, the court presumes that shared legal custody is in the child's best interest. This presumption applies only to legal custody—not physical custody.

To overcome this presumption and obtain sole legal custody, a parent must show that shared decision-making would harm the child. Courts look at factors like a history of domestic violence, substance abuse, an inability to communicate, or a pattern of unilateral decision-making that disregards the other parent's role.

For physical custody, there is no statutory presumption. Courts determine the arrangement based on the child's needs, each parent's ability to provide care, the child's existing routines, and practical considerations like proximity to school and work schedules. For guidance on how your Massachusetts divorce filing process works alongside custody, review our filing checklist.

Child Support and Parenting Time

Massachusetts uses the income shares model under the 2023 Child Support Guidelines (amended July 31, 2023). Your custody arrangement directly affects how support is calculated.

How Parenting Time Affects Support

• Standard arrangement (roughly 2/3–1/3): The non-residential parent pays support to the residential parent based on each parent's share of combined income
• Shared arrangement (approximately equal): The worksheet calculates each parent's theoretical obligation and offsets them; the net difference flows from the higher-obligation parent to the other
• Split arrangement: Each parent provides a primary residence for at least one child; obligations are calculated and offset similarly to shared

Key Support Figures

• Combined income cap: $400,000 per year ($7,692/week)
• Minimum order: $12/week when the payor earns $210/week or less
• Multiple children: Table B multipliers apply (2 children: 1.40×, 3 children: 1.68×, 4 children: 1.85×)
• Child care costs: Shared proportionally by income, up to $355/week per child
• Health insurance: Must be provided if “reasonable in cost” (5% or less of the ordered parent's gross income)

For a detailed breakdown of how Massachusetts calculates child support, see our Massachusetts child support guide.

Parent Education Course

In contested custody cases filed under § 1B, both parents must complete the “Two Families Now” online co-parenting course under Standing Order 3-23. This four-hour course covers the impact of divorce on children and strategies for effective co-parenting.

• Registration deadline: Within 30 days of service
• Completion deadline: Within 30 days of enrollment
• Certificate filing: Within 14 days of completion
• Cost: $49 per parent (waivable via Affidavit of Indigency using form CJD-444)
• Exemption: Joint petitions filed under § 1A are excluded from this requirement

Failure to complete the course can delay your case. Judges may withhold entry of the final judgment until both parents file their completion certificates.

Modifying Custody Orders

Massachusetts allows modification of custody orders when circumstances change. Under the 2023 Child Support Guidelines, modification may be warranted when:

• Material change in circumstances: A significant change has occurred since the original order—such as a job loss, relocation, change in the child's needs, or a change in parenting capacity
• Guideline inconsistency: The existing support order is inconsistent with a current Guidelines-based calculation
• Health coverage change: A material change in health insurance availability or cost
• Child's age: Support for children ages 18–23 may be ordered at the court's discretion if the child is still dependent

To modify custody or parenting time, file a Complaint for Modification in the Probate and Family Court that issued the original order. The court will evaluate whether the modification serves the child's best interest. For more on the overall timeline, see our Massachusetts divorce timeline.

The Nisi Period and Final Custody Orders

All Massachusetts divorce judgments—including custody provisions—start as “nisi” and become absolute after 90 days. This means:

• § 1A uncontested: After the court approves the separation agreement, the judgment nisi enters within 30 days; 90 days later it becomes final (roughly 120 days total)
• § 1B contested: No hearing earlier than 6 months from filing; after the judgment nisi is entered, wait 90 more days for the judgment to become absolute

Your custody and parenting plan provisions take effect as temporary orders while the case is pending and become permanent once the judgment is absolute.

Key Takeaways

• Shared legal custody presumed: Massachusetts presumes temporary shared legal custody when divorce is filed; sole legal custody requires written findings
• No physical custody presumption: Courts decide physical custody based on the child's best interest, not a default split
• Best interest standard controls: Judges evaluate each family's circumstances individually under § 31
• Domestic violence matters: § 31A creates a rebuttable presumption against custody for an abusive parent
• Parenting plan required for shared custody: Written plans must address schedules, decision-making, holidays, transportation, and dispute resolution
• Income shares model: Child support under the 2023 Guidelines uses both parents' income with a $400,000 annual cap
• Parent education course: “Two Families Now” (4 hours, $49) is mandatory in contested § 1B cases
• Nisi period: All divorce judgments become final 90 days after entry of the judgment nisi