Mississippi Poised to Become Sixth State with 50-50 Custody Presumption
Governor Tate Reeves faces an April 13, 2026 deadline to sign or veto House Bill 1662, legislation that would make Mississippi the sixth state in the nation to establish a rebuttable presumption of equal (50-50) joint physical custody in divorce and separation cases. If signed, the law takes effect July 1, 2026, fundamentally changing how Mississippi courts approach parenting time and child support calculations for the estimated 12,000 divorce cases filed annually in the state.
| Key Facts | Details |
|---|---|
| What happened | Mississippi Legislature passed HB 1662 creating 50-50 custody presumption |
| Governor's deadline | April 13, 2026 |
| Effective date if signed | July 1, 2026 |
| States with similar laws | Kentucky, Arizona, Arkansas, West Virginia, Florida |
| Key change | Rebuttable presumption of equal physical custody |
| Child support impact | New income-shares model comparing both parents' earnings |
What HB 1662 Actually Changes in Mississippi Family Law
HB 1662 represents the most significant overhaul of Mississippi custody law since the state codified the Albright factors in 1983. Currently, Mississippi courts apply the "best interest of the child" standard under Miss. Code Ann. § 93-5-24 without any presumption favoring either parent or any particular custody arrangement. Judges have broad discretion, and outcomes vary significantly between chancery courts across the state's 82 counties.
The new legislation would amend Miss. Code Ann. § 93-5-24 to establish that courts must begin custody determinations with a presumption that equal physical custody (defined as each parent having the child at least 45% of overnights annually, or approximately 164 nights) serves the child's best interest. This presumption can be rebutted by clear and convincing evidence showing that equal custody would be detrimental to the child.
According to Mississippi Today's reporting, the bill passed the House 78-42 and the Senate 35-16, indicating bipartisan support but also significant opposition. The legislation emerged from the Joint Legislative Study Committee on Child Custody, which held public hearings throughout 2025 and reviewed research on shared parenting outcomes.
The Child Support Calculation Overhaul
Beyond the custody presumption, HB 1662 transforms how Mississippi calculates child support. The current system under Miss. Code Ann. § 43-19-101 uses a percentage-of-income model that primarily considers the non-custodial parent's gross income. The state guidelines set support at 14% of adjusted gross income for one child, 20% for two children, 22% for three children, 24% for four children, and 26% for five or more children.
HB 1662 would replace this with an income-shares model that calculates child support based on the combined income of both parents, then allocates the support obligation proportionally. Forty-one states already use some version of the income-shares model. Under this approach, if Parent A earns $60,000 annually and Parent B earns $40,000, Parent A would be responsible for 60% of the calculated child support need.
The bill also introduces a parenting time adjustment that reduces child support obligations when the paying parent exercises significant parenting time. Under the proposed formula, a parent with 45% or more overnights would see a substantial reduction in their support obligation compared to a parent with only every-other-weekend visitation (roughly 14% of overnights).
How Other States Have Implemented Similar Laws
Mississippi would join Kentucky, Arizona, Arkansas, West Virginia, and Florida in establishing a presumption of equal custody. Kentucky became the first state to pass such legislation in 2017, and research published in the Journal of Divorce and Remarriage (2022) found that the percentage of cases resulting in shared physical custody increased from 31% to 54% within three years of implementation.
Florida's version, which took effect July 1, 2023 under Fla. Stat. § 61.13, includes provisions addressing domestic violence, substance abuse, and parental mental health that allow courts to deviate from the presumption. HB 1662 contains similar safeguards. The bill explicitly provides that evidence of domestic violence, child abuse, substance abuse, or other factors that would endanger the child constitutes grounds for rebutting the presumption.
Arizona's shared parenting law, codified at Ariz. Rev. Stat. § 25-403.02, has been in effect since 2013 and requires courts to maximize each parent's parenting time. Arizona courts have interpreted this to mean that departures from equal custody require specific findings explaining why the deviation serves the child's interest.
Practical Implications for Mississippi Families
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Pending divorce cases filed before July 1, 2026 would proceed under current law, but cases filed on or after the effective date would be subject to the new presumption. Attorneys recommend that parents with concerns about a pending case consult counsel immediately regarding timing considerations.
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Existing custody orders are not automatically modified by the new law. Parents seeking to change existing arrangements would still need to demonstrate a material change in circumstances, though the new presumption could influence how courts evaluate modification requests.
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Parents who have historically served as primary caregivers should prepare evidence documenting their role if they believe equal custody would not serve their child's best interest. Under the clear and convincing evidence standard, general preferences or convenience arguments will not rebut the presumption.
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Child support amounts in cases decided after July 1, 2026 may differ significantly from current guidelines. The income-shares model with parenting time adjustments could result in either higher or lower support obligations depending on the specific circumstances.
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Mediation and collaborative divorce processes will likely emphasize the 50-50 starting point, potentially reducing litigation costs for parents willing to work together on parenting arrangements.
What Happens If the Governor Vetoes
If Governor Reeves vetoes HB 1662, the Legislature could override the veto with a two-thirds majority vote in both chambers. Given the original passage margins (78-42 in the House, 35-16 in the Senate), an override vote would require shifting approximately 6 House votes and 2 Senate votes. The Legislature's regular session has concluded, so an override vote would require a special session or action during the 2027 regular session.
If the Governor takes no action by April 13, 2026, the bill becomes law without his signature under Mississippi constitutional provisions governing gubernatorial review periods.
Frequently Asked Questions
Does HB 1662 guarantee every parent gets 50-50 custody?
No, HB 1662 creates a rebuttable presumption, not a guarantee. Courts may deviate from equal custody when clear and convincing evidence shows the arrangement would harm the child. Domestic violence, substance abuse, child neglect, work schedules requiring frequent travel, and geographic distance between parents can all serve as grounds for rebutting the presumption under the bill's provisions.
When would the new custody law take effect in Mississippi?
If Governor Reeves signs HB 1662 before the April 13, 2026 deadline, the law takes effect July 1, 2026. Cases filed on or after that date would be subject to the new 50-50 custody presumption and income-shares child support model. Divorce petitions filed before July 1 remain under current Mississippi law.
How does the income-shares child support model differ from current Mississippi guidelines?
Mississippi currently uses a percentage-of-income model under Miss. Code Ann. § 43-19-101, setting support at 14-26% of the non-custodial parent's income based on number of children. The income-shares model in HB 1662 calculates support from both parents' combined income, then divides the obligation proportionally. A parent with 50% parenting time under the new formula would pay significantly less than one with 14% under current guidelines.
Can existing custody orders be modified under the new law?
Yes, but parents must still prove a material change in circumstances to modify existing orders under Miss. Code Ann. § 93-5-24. The new presumption applies to initial custody determinations and may influence how courts evaluate modification petitions, but simply citing the law's passage does not constitute grounds for automatic modification of current arrangements.
What evidence can rebut the 50-50 custody presumption?
HB 1662 allows courts to deviate from equal custody based on clear and convincing evidence of domestic violence, child abuse or neglect, substance abuse affecting parenting capacity, severe mental health conditions impacting child safety, geographic distance exceeding 50 miles between parental residences, or a child's established school and community ties that would be disrupted by frequent transitions.
If you are navigating a divorce or custody matter in Mississippi and have questions about how HB 1662 might affect your situation, speaking with a local family law attorney can help you understand your options.
This article discusses recent news and provides general legal commentary. It does not constitute legal advice. Every case is unique. Consult a qualified family law attorney for advice specific to your situation.