Mississippi lawmakers passed HB 1662 on April 1, 2026, sending the most significant child custody reform in decades to Governor Tate Reeves' desk. The bill creates a rebuttable presumption of equal (50-50) joint physical custody, rewrites the state's child support formula to compare both parents' incomes, and requires judges to document specific findings before deviating from the equal-time baseline. If signed, these changes take effect July 1, 2026.
| Key Fact | Detail |
|---|---|
| What happened | Mississippi legislature passed HB 1662 through both chambers |
| When | April 1, 2026 |
| Current status | Sent to Governor Tate Reeves for signature |
| Core change | Rebuttable presumption of 50-50 joint physical custody |
| Child support impact | New income-comparison formula replacing current guidelines |
| Effective date | July 1, 2026, if signed into law |
HB 1662 Replaces Mississippi's Decades-Old Custody Framework
Mississippi has long operated under the Albright factors, a 12-point best-interest test established in Albright v. Albright, 628 So. 2d 235 (Miss. 1993). That framework gave chancellors broad discretion to weigh factors like each parent's moral fitness, emotional ties, and stability of the home environment. HB 1662 does not eliminate best-interest analysis entirely, but it fundamentally shifts the starting point.
Under the new bill, every custody determination begins with a presumption that equal physical custody serves the child's best interest, as reported by Mississippi Today. A parent seeking a different arrangement must present clear and convincing evidence to rebut that presumption. The chancellor must then issue written findings explaining why deviation is warranted, creating an appellate record that did not previously exist in most Mississippi custody orders.
This is a structural change, not a cosmetic one. Under Miss. Code Ann. § 93-5-24, current law already allows joint custody but does not presume it. HB 1662 flips that default. Chancellors retain authority to order sole custody or unequal time-sharing, but they must justify their reasoning on the record.
How the New Child Support Formula Works
The bill's second major provision rewrites Mississippi's child support calculations. Current guidelines under Miss. Code Ann. § 43-19-101 use a percentage-of-income model that applies fixed percentages (14% for one child, 20% for two, 22% for three, and up to 26% for five or more) to the non-custodial parent's adjusted gross income.
HB 1662 replaces this single-income approach with an income-shares model that compares both parents' earnings. Under the new formula, total child support obligation is calculated from combined parental income, then allocated proportionally based on each parent's share of that total. When physical custody time approaches 50-50, the support obligation decreases or potentially reaches zero if incomes are comparable.
Consider an example: Parent A earns $60,000 annually and Parent B earns $40,000. Their combined income is $100,000. Under the new model, Parent A bears 60% of the child support obligation and Parent B bears 40%. With equal parenting time, the net transfer from Parent A to Parent B would be significantly less than under the current percentage model, which could require Parent A to pay 14% of adjusted gross income ($8,400 per year for one child) regardless of how much time the child spends in each home.
Mississippi would join approximately 40 other states that already use some form of income-shares model for child support calculations. The shift also aligns support obligations with actual parenting time, a change that advocacy groups on both sides of the custody debate have debated for years.
What This Means for Pending and Future Mississippi Cases
The July 1, 2026 effective date creates a 90-day window that Mississippi families should take seriously. Three groups face distinct considerations.
Parents currently in active custody litigation should discuss timing strategy with their attorneys immediately. Cases filed before July 1 will likely proceed under existing law, but any custody modification filed after the effective date would fall under the new presumption. The transition rules within HB 1662 will determine exactly how pending cases are handled, and chancellors across Mississippi's 20 chancery court districts may interpret those provisions differently during the early months.
Parents with existing custody orders who want to pursue modification have reason to prepare now. Under current Miss. Code Ann. § 93-5-24, a parent seeking custody modification must demonstrate a material change in circumstances. HB 1662's passage itself may constitute such a change, potentially opening the door for parents who previously received less than 50% custody time to seek modification under the new presumption. Attorneys across the state should expect a wave of modification petitions beginning in July.
Parents who currently share roughly equal time but pay child support based on the old percentage model may benefit from recalculation under the income-shares formula. A parent earning $50,000 who currently pays $7,000 annually (14% of adjusted gross income for one child) could see that obligation reduced substantially when the new formula accounts for equal parenting time.
Practical Takeaways for Mississippi Families
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Track the governor's action closely. Governor Reeves has not publicly indicated whether he will sign HB 1662, and he has until the constitutional deadline to act. If signed, the July 1, 2026 effective date gives families roughly 90 days to prepare.
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Gather income documentation now. The new income-shares model requires both parents' financial information. Collect recent tax returns, pay stubs, and records of any additional income sources. Having these documents ready before July 1 saves weeks in the modification process.
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Review your current custody order's specific language. The rebuttable presumption applies to future determinations, but the strength of your modification petition depends on how your existing order compares to the 50-50 baseline. An order granting you 40% parenting time tells a different story than one granting 20%.
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Consult a Mississippi family law attorney before filing anything. The transition period between old law and new law creates procedural questions that will take months to resolve through case law. Filing prematurely or under the wrong framework could weaken your position.
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Do not assume 50-50 custody is guaranteed. The presumption is rebuttable. Domestic violence history, substance abuse, geographic distance between parents, a child's established school schedule, and other factors can all overcome the presumption. The bill expands the starting point, not the ending point.
Frequently Asked Questions
When does Mississippi's 50-50 custody law take effect?
HB 1662 takes effect July 1, 2026, if Governor Tate Reeves signs the bill into law. The governor has not yet indicated whether he will sign. Cases filed after the effective date will fall under the new rebuttable presumption of equal joint physical custody and the revised income-shares child support formula.
Can I modify my existing custody order under the new law?
Yes, parents with existing orders can petition for modification after July 1, 2026. Under Miss. Code Ann. § 93-5-24, modification requires a material change in circumstances. The enactment of HB 1662 may itself qualify as a material change, though Mississippi chancellors will ultimately determine how broadly that argument applies during the first year of implementation.
How does the new child support formula differ from current Mississippi law?
Current law under Miss. Code Ann. § 43-19-101 applies a flat percentage (14% for one child) to the non-custodial parent's income only. HB 1662 switches to an income-shares model that combines both parents' incomes, allocates support proportionally, and reduces the obligation when parenting time is equal. A parent earning $50,000 with 50-50 custody could see support drop from roughly $7,000 per year to near zero if incomes are comparable.
Does 50-50 custody mean exactly equal time?
Not necessarily. The presumption establishes equal physical custody as the starting point, but chancellors retain authority to order different arrangements when evidence supports deviation. Factors like work schedules, school proximity, a child's age, and parental fitness can all justify departures from the 50-50 baseline. The key change is that judges must now document their reasoning in writing.
What happens to cases already filed before July 1?
Cases filed before July 1, 2026, will generally proceed under existing Mississippi custody law, including the Albright factors and current child support percentages. However, the specific transition provisions within HB 1662 will govern edge cases. Parents in active litigation should consult their attorney about whether strategic timing adjustments make sense given the 90-day window.
Mississippi residents navigating custody decisions in 2026 face a changing legal landscape. Whether HB 1662 benefits your specific situation depends on your income, current custody arrangement, and individual circumstances.
Find a Mississippi divorce attorney in your county to discuss how HB 1662 may affect your case.
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.