Mississippi HB 1662: 50-50 Joint Custody Default Starts July 1, 2026

Mississippi Governor Tate Reeves signed House Bill 1662 on April 1, 2026, creating a rebuttable presumption that equal 50-50 parenting time serves a child's best interest. Effective July 1, 2026, Mississippi becomes the 6th U.S. state to adopt an equal-time default, shifting the burden to the parent opposing equal time and requiring judges to justify any deviation in writing.

This is the most significant change to Mississippi custody law in a generation. For parents heading into a contested divorce after July 1, 2026, the starting assumption in a courtroom will no longer be one primary custodian and one visiting parent — it will be two equally involved parents, each with roughly half the child's overnights.

Key Facts

Why this matters legally

HB 1662 reverses the default position in every contested Mississippi custody case filed after July 1, 2026. Before this law, a parent seeking equal time carried the practical burden of persuading a chancellor that shared custody was workable. Now the presumption flips: the court starts from 50-50, and the parent who wants unequal time must produce evidence to rebut that presumption.

The word "rebuttable" is the legal center of gravity here. A rebuttable presumption is not a guarantee of equal time — it is a starting point a judge must apply unless the opposing parent proves equal time would harm the child. Under HB 1662, a chancellor who deviates from 50-50 must state the specific reasons in a written order. That written-findings requirement is enforceable on appeal, meaning a deviation unsupported by the record can be reversed.

Mississippi joins a small group of states — Kentucky was the first in 2018 — that presume equal parenting time. For readers weighing next steps, understanding child custody arrangements and how a court evaluates them is now more consequential than ever, because the legal baseline has moved toward shared parenting.

How Mississippi law handles this

Mississippi custody decisions have long turned on the "best interest of the child" standard, guided by the twelve Albright factors established in Albright v. Albright, 437 So. 2d 1003 (Miss. 1983). HB 1662 does not abolish the Albright analysis — it layers a rebuttable 50-50 presumption on top of it. Chancellors will still weigh factors like each parent's stability, health, and continuity of care, but they now begin from equal time rather than from a blank slate.

Joint custody authority in Mississippi flows from Miss. Code Ann. § 93-5-24, which already permitted chancellors to award joint physical and legal custody. HB 1662 strengthens that provision by making equal physical custody the presumed outcome rather than one option among many. The law also carves out standard exceptions — evidence of family violence, abuse, or a demonstrable safety risk rebuts the presumption, consistent with Mississippi's existing domestic-violence protections.

The second major change is financial. HB 1662 replaces Mississippi's flat statutory percentage child-support formula — historically 14% of adjusted gross income for one child, 20% for two, scaling up under Miss. Code Ann. § 43-19-101 — with a comparative-income model in equal-time cases. When both parents share overnights roughly equally, support is calculated by comparing incomes and offsetting each parent's share, rather than treating one parent as the sole payor. In practice, this can reduce a support obligation by 30-50% when incomes are comparable and time is truly split. Parents can estimate the effect using our parenting time calculator and child support calculator, though final numbers depend on the court's findings.

Because the comparative-income model ties dollars directly to overnights, the fight over parenting schedules and the fight over money are now the same fight. A parent who secures equal time also reshapes the support calculation. Learning how parenting plans allocate overnights, holidays, and transportation is now essential financial planning, not just scheduling.

Practical takeaways

1. Document your parenting involvement now. Under the new presumption, evidence of your day-to-day caregiving — school pickups, medical appointments, homework, extracurriculars — supports your position for equal time. Start keeping a dated log before you file.

2. If you oppose equal time, build a specific record. The presumption is rebuttable, but only with evidence. General complaints will not overcome it; documented concerns about safety, instability, or a child's genuine best interest will. A custody evaluation may become a key tool.

3. Recalculate your budget. If equal time triggers the comparative-income support model, a support obligation could drop 30-50%. Whether you pay or receive support, model both scenarios before agreeing to a schedule.

4. Address relocation early. Equal time is difficult to sustain when parents live far apart. If a move is likely, understand how relocation rules interact with the new presumption before finalizing any plan.

5. Time your filing intentionally. Cases filed before July 1, 2026 fall under the prior standard; cases filed after fall under HB 1662. That date can materially change your starting position, so discuss timing with counsel.

6. Map your next steps. A personalized divorce roadmap can help you organize documents, deadlines, and decisions specific to Mississippi's new framework.

If you are navigating a Mississippi custody matter under this new law, the stakes of getting your parenting plan right have never been higher. Consider speaking with a qualified Mississippi family law attorney who can apply HB 1662 to your specific facts — you can find a divorce attorney serving your county through our directory.

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.