People use "equal co-parenting" to mean three different things at
once: a stance about children, a particular schedule, and a legal
policy. Most conversations about it go badly because those three
keep getting conflated.
This piece is the definition, not the playbook. Tactical guidance
(documentation, modification, working with counsel) lives elsewhere
on this site.
What equal co-parenting actually means
Equal co-parenting is, first, a position about children.
When both parents are fit, willing, and able, children's
continuing relationships with each parent should be the legal and
practical default — not something one parent has to win and the
other has to lose. The stance is not about who deserves more time.
It is about which arrangement starts from the position of preserving
a child's relationships.
Two phrases earn careful definition.
"Fit, willing, and able" carries most of the disagreement in
this space. Fit means the parent is capable of meeting the child's
needs. Willing means the parent wants the role. Able means
circumstances (geography, work, health) permit it. The stance
assumes those conditions; it does not pretend they are universal.
"Default" means the starting position, not a guarantee. Specific
families will adjust for legitimate reasons. The operative phrase is
children's continuing relationships with both parents. Not adult
rights, not gendered framings, and not any version of one parent
winning.
What equal co-parenting is not
The conflations are where the conversation breaks down. Four come up
repeatedly.
Not a mandated 50/50 schedule
A 50/50 schedule is one way to honor the stance. So is 60/40, 70/30,
or any arrangement that reflects the family's circumstances and the
child's needs. The schedule is a working agreement. The stance is
the principle behind whatever schedule emerges.
Most public arguments about equal co-parenting are really arguments
about a number. Separating the number from the underlying question
lets both be discussed honestly.
Not a denial of safety exceptions
Substantiated abuse, neglect, coercive control, or serious parental
unfitness are legitimate reasons to deviate from a shared-parenting
default. Researchers who study family-court responses to
intimate-partner violence emphasize that a history of coercive
control is a contraindication for shared-parenting arrangements. [3]
Every reform statute discussed below preserves a safety exception
by design.
What counts as a triggering finding varies by jurisdiction.
Kentucky's law references protective orders; Florida ties the
override to findings under §61.13. The threshold for the safety
exception is set by each statute, not by advocacy.
The stance is about fit-parent families. It is not a framework for
cases where fitness is in question.
Not anti-court or anti-other-parent
The critique that motivates this work is how courts apply existing
best-interests standards, not that courts are illegitimate or that
the other parent is the enemy. Judges, attorneys, and guardians ad
litem are working within a difficult statutory framework. Reform
efforts are about updating that framework, not delegitimizing the
people working inside it.
Not a prescription for every family
Some fit-parent families will choose unequal arrangements for
legitimate reasons: geography, work schedules, the preferences of
an older child. The stance is the default, not the rule. The
publication's position is that families and courts should start
there, not that families must end there.
What the research says about shared parenting outcomes
The empirical case for the stance rests on two bodies of work.
Bauserman's 2002 meta-analysis of 33 studies (covering 1,846
sole-custody and 814 joint-custody arrangements) found that
children in joint physical or legal custody were better adjusted
than children in sole-custody settings, and no different from
children in intact families. The pattern held across measures of
general adjustment, family relations, self-esteem, emotional
adjustment, behavioral adjustment, and divorce-specific adjustment.
Academic adjustment was the exception. [1]
A more recent review by Nielsen (2018) examined 60 studies. In the
large majority, children in joint physical custody had better
outcomes on most measures. The pattern persisted even when
researchers controlled for family income and parental conflict. [2]
A few honest qualifications:
- "Better outcomes on average" is not "guaranteed outcomes for every
family." - The studies vary in design, sample size, and definitions of
"joint custody." - Linda Nielsen is a productive researcher in this area whose work
is peer-reviewed and widely cited; some scholars also characterize
her as an advocate. The argument here is that her work and
Bauserman's converge, not that either constitutes the entirety
of the field.
The direction of the evidence is reasonably consistent. The precise
magnitude in any specific case is not.
The gap between best-interests law and how courts apply it
The prevailing standard in US family courts is the "best interests
of the child." [7] There is no federal definition. Each state
writes its own factor list, typically including the child's
relationships with each parent, the child's adjustment to home and
community, the mental and physical health of all parties, and any
history of abuse.
Reform advocates argue that a gap exists between what these
standards permit and how they are applied in practice. They point
to a pattern of courts defaulting to a primary-parent/visitor
structure even where the statute would support a more shared
arrangement.
This is honestly an advocacy claim, not a settled empirical fact.
The most authoritative federal data is the US Census Bureau's
Custodial Parents and Their Child Support: 2022 report, released
in August 2025. It does show a heavy asymmetry in the population
identified as "custodial parents." [8] But the report conflates
legal and physical custody categories. It is a directional
indicator, not a precise measurement of court behavior.
The gap is real enough to motivate reform. Its exact size is
contested.
What shared-parenting reform looks like in practice
Three US states are most often cited as the equal-parenting-time
reform exemplars:
- Kentucky (2018). House Bill 528 created a rebuttable
presumption that joint custody and equal parenting time are in
the best interest of the child — the first such law in the
country. It passed 81-2 in the House and unanimously in the
Senate. A domestic-violence finding overrides the presumption.
[4] - Arkansas (2021). Codified at Arkansas Code § 9-13-101, the
law makes Arkansas the second state with a rebuttable presumption
of joint custody, and the only one to require clear and
convincing evidence to rebut. That is a meaningfully higher bar
than the other two. [5] - Florida (2023). House Bill 1301, codified within Florida
Statutes § 61.13, created a rebuttable presumption that equal
time-sharing is in the best interest of the child. Florida uses
the preponderance-of-evidence standard, the same as Kentucky. [6]
The three statutes side by side:
| State | Year | Bill / Code | Standard to rebut | Safety exception |
|---|---|---|---|---|
| Kentucky | 2018 | HB 528 | Preponderance of evidence | Domestic-violence finding overrides |
| Arkansas | 2021 | Act 604 / Ark. Code § 9-13-101 | Clear and convincing evidence | Domestic-violence finding overrides |
| Florida | 2023 | HB 1301 / Fla. Stat. § 61.13 | Preponderance of evidence | Domestic-violence finding overrides |
Three things every one of these statutes preserves:
- The safety exception. A finding of domestic violence
overrides the presumption. - Judicial discretion on best-interests grounds.
- The "rebuttable" word. None of these statutes are 50/50
mandates. They are starting positions a court can, and must,
adjust when the evidence warrants.
The evidentiary differences matter. Arkansas's higher bar makes its
presumption harder to overturn than in Kentucky or Florida. That is
by design: each statute reflects a different choice about how
strong a default the legislature intended.
The map of rebuttable-presumption states is larger and more nuanced
than these three exemplars. West Virginia (2022) and Wyoming (2025)
target equal physical custody directly; Mississippi enacted similar
legislation in 2026 (effective July 1, 2026). Other jurisdictions —
including the District of Columbia, Idaho, Louisiana, Minnesota,
Missouri, Nevada, New Hampshire, and New Mexico — have presumptions
of varying scope, with some applying to joint legal custody only
rather than to parenting time. As of mid-2026, at least ten
additional states have active legislation pending. The complete
state-by-state breakdown, with statute citations and pending bills,
is in our equal-parenting state tracker.
What this means for your family
If you are at the beginning of separation or co-parenting and
hearing "equal co-parenting" used in different ways by different
people, start by separating the three meanings.
- The stance — children's continuing relationships with both
fit parents as the default — is something you can hold regardless
of what your schedule or your state's statute looks like. - The schedule is a working agreement. It can be 50/50, 60/40,
or whatever fits your family's circumstances and your child's
needs. - The statute depends on where you live. Three states have
rebuttable presumptions of equal shared parenting; most others
use a multi-factor best-interests test.
For specific guidance on documentation, modifications, or court
navigation, other pieces on this site go deeper. This article is
not legal advice; for jurisdiction-specific questions, consult
counsel.
Frequently asked questions
What is equal co-parenting?
Equal co-parenting is the position that when both parents are fit,
willing, and able, children's continuing relationships with both
parents should be the legal and practical default. It is a stance
about children, not parents, and it is distinct from any particular
schedule or legal mechanism.
Is equal co-parenting the same as 50/50 custody?
No. A 50/50 schedule is one way to honor the stance, but the stance
does not require any particular schedule. A 60/40 or 70/30 split
can reflect the same principle if it fits the family's circumstances
and the child's needs.
What does "fit, willing, and able" parent mean?
Fit means capable of meeting the child's needs. Willing means
the parent wants the role. Able means circumstances — geography,
work, health — permit it. The phrase is a precondition the stance
assumes, not a universal claim.
Does research show shared parenting is better for children?
The available research is reasonably consistent in direction. A
meta-analysis of 33 studies (Bauserman, 2002) and a review of 60
studies (Nielsen, 2018) generally find that children in joint
physical or legal custody show outcomes comparable to or better
than children in sole-custody arrangements, across measures of
emotional, behavioral, and psychological well-being.
Which states have rebuttable presumptions of shared parenting?
At least 14 US jurisdictions have enacted rebuttable presumptions of
shared parenting in some form, with substantial variation in scope.
The three most commonly cited as equal-parenting-time reform
exemplars are Kentucky (2018), Arkansas (2021), and Florida (2023) —
Arkansas is unique in requiring clear and convincing evidence to
rebut. Other jurisdictions have presumptions that apply to joint
legal custody only or target equal physical custody directly. Every
statute preserves a safety exception. The complete state-by-state
breakdown is in our equal-parenting state tracker.
How is shared parenting different from joint custody?
"Joint custody" can refer to legal custody (decision-making),
physical custody (where the child lives), or both. "Shared
parenting" and "equal co-parenting" most often refer to shared
physical custody, where the child's time is divided between the
parents, though the underlying stance is about the child's
relationships, not the schedule.
What about cases involving abuse or safety concerns?
Every reform statute discussed here explicitly preserves a safety
exception. Substantiated abuse, neglect, or coercive control
overrides any shared-parenting presumption. Researchers studying
family-court responses to intimate-partner violence emphasize that
a history of coercive control is a contraindication for
shared-parenting arrangements.
What is the "best interests of the child" standard?
It is the standard most US family courts apply in custody decisions.
There is no federal statutory definition. Each state enacts its own
list of factors a court must consider, typically including the
child's relationships, adjustment, health, and any history of
abuse.
References
- Bauserman, R. (2002). Child adjustment in joint-custody versus
sole-custody arrangements: A meta-analytic review. Journal of
Family Psychology, 16(1), 91-102.
https://psycnet.apa.org/record/2002-00749-009 - Nielsen, L. (2018). Joint versus sole physical custody: Children's
outcomes independent of parent-child relationships, income, and
conflict in 60 studies. Journal of Divorce & Remarriage.
https://www.tandfonline.com/doi/abs/10.1080/15379418.2017.1422414 - Jaffe, P. G., et al. (2025). Appropriate parenting arrangements
in cases of intimate partner violence and coercive control: From
research and legislative reform to changes in practice. Family
Court Review.
https://onlinelibrary.wiley.com/doi/10.1111/fcre.70002 - Kentucky General Assembly. (2018). House Bill 528.
https://apps.legislature.ky.gov/record/18rs/hb528.html - Arkansas Code § 9-13-101 (as amended by Act 604, 2021).
https://law.justia.com/codes/arkansas/title-9/subtitle-2/chapter-13/subchapter-1/section-9-13-101/ - Florida Statutes § 61.13 (as amended by HB 1301, 2023).
https://www.leg.state.fl.us/statutes/index.cfm?App_mode=Display_Statute&URL=0000-0099/0061/Sections/0061.13.html - Cornell Law School, Legal Information Institute.
Best interests of the child (Wex).
https://www.law.cornell.edu/wex/best_interests_of_the_child - US Census Bureau. (August 2025). Custodial Parents and Their
Child Support: 2022. Current Population Reports P60-285.
https://www2.census.gov/library/publications/2025/demo/p60-285.pdf