A Florida court will not change an existing parenting plan just because one parent wants something different. Under Florida Statute 61.13(3), a judge can only modify custody, parental responsibility, or a time-sharing schedule after the requesting parent proves two things: a substantial and material change in circumstances since the last order, and that the modification serves the child’s best interests.
If you believe your circumstances have shifted enough to revisit your parenting plan, a modifications attorney in New Port Richey can help you evaluate whether your situation meets this standard before you file.
Florida law no longer uses the word “custody” in a formal sense. Instead, courts work with parenting plans, time-sharing schedules, and parental responsibility. The rule governing changes to any of these comes from Florida Statute 61.13, which allows a court to modify parenting and time-sharing arrangements based on the best interests of the child, following the Uniform Child Custody Jurisdiction and Enforcement Act.
The statute is explicit that a parenting plan or time-sharing schedule cannot be modified without showing a substantial and material change in circumstances, along with a determination that the modification is in the child’s best interests. Florida SenateFlorida Senate
This means a parent cannot simply ask a judge to revisit the case because they disagree with how things turned out the first time. The original order is treated as settled unless something has genuinely shifted.
Florida courts look for change that is significant, ongoing, and directly connected to the child’s welfare or a parent’s ability to follow the current parenting plan. A single bad week, a temporary disagreement, or dissatisfaction with the other parent’s parenting style will not clear this bar.
The change also needs to be lasting rather than short-lived. A parent who lost a job for a month and has since returned to work has not shown the kind of durable shift that supports modification. A parent who develops a long-term illness that limits their ability to safely care for the child is in a different position entirely.

Common scenarios that Florida courts have treated as substantial and material changes include:
Parents often assume more situations meet the standard than actually do. Florida courts have generally rejected modification requests based on:
The distinction matters because filing a modification petition without a real substantial change can result in dismissal before the court considers the best-interest factors.
Proving a substantial change only opens the door. The court still has to decide whether changing the plan actually benefits the child. Florida Statute 61.13(3) lists factors judges weigh at this stage, including each parent’s ability to encourage a relationship with the other parent, the child’s stability in their current environment, each parent’s mental and physical health, and any history of domestic violence or abuse.
A parent working with a child custody attorney on a modification needs to be ready to address both halves of this test, not just the first.
The two-part framework used today traces back to the Florida Supreme Court’s decision in Wade v. Hirschman. The court concluded that, unless a final judgment says otherwise, the same substantial change test applies to post-dissolution modification of all custody agreements in Florida. That ruling ended a split among Florida’s appellate courts and confirmed that parents cannot get a fresh, from-scratch custody review simply by asking for one. The existing order carries weight, and it stays in place until a real change is shown.
Parents considering a modification should start by documenting the change in detail: dates, records, medical or employment documentation, and anything that shows the change is lasting rather than temporary.
From there, a modification attorney in New Port Richey can review the facts against Florida’s two-part standard and advise whether custody, child support, or the full parenting plan should be revisited together. This is especially useful for Pasco County families navigating relocation, health changes, or a shift in either parent’s schedule.
If your circumstances have changed since your parenting plan was entered, whether through relocation, a health change, a shift in work schedule, or a safety concern, the details matter more than the general situation.
A modifications attorney in New Port Richey can review your specific facts against Florida’s substantial change standard and help you understand whether filing makes sense before you commit time and cost to a petition. Call (727) 862-4411 or contact our office online to schedule a consultation.