Introduction: A Common Situation That Catches Parents Off Guard
Life after divorce rarely stays the same. Children grow up, circumstances change, and parenting arrangements that made sense years ago often need to evolve. One of the most common — and financially significant — changes that can happen is when a child who originally lived primarily with one parent decides, or is placed, to live full time with the other parent instead.
When that happens, most parents understandably assume that child support will automatically adjust to reflect the new reality. After all, if your child is now living in your home every day — eating your food, using your utilities, relying on you for everything — it seems obvious that the financial arrangement should follow.
But here is a reality that surprises many Florida parents: child support does not change automatically when your timesharing situation changes. You must go to court and formally request a modification. And if you wait too long to do that, you could end up continuing to pay child support for months or even years after your child stopped living primarily with the other parent.
A 2023 Florida appellate decision — Hardwick v. Smith — addressed exactly this situation, and the court’s ruling is important news for any parent navigating child support in the Tampa Bay area. As a Tampa divorce lawyer, I want to walk you through what happened in that case, what the court decided, and what it means for you.
Understanding Child Support Modification in Florida: The Basics
Before we dive into the Hardwick case, it helps to understand how child support modification works in Florida — because the rules may be different from what you expect.
Child Support Does Not Modify Itself
In Florida, a child support order remains in effect exactly as written until a court formally changes it. It does not matter if your child has moved, your income has changed dramatically, or the other parent has completely stopped seeing your child. Until a judge signs a new order, the old one controls. This means that if you are the paying parent and your circumstances have changed significantly, you cannot simply stop paying or pay less. Doing so puts you at risk of being held in contempt of court — even if the change in circumstances is completely legitimate.
The correct path is to file a petition for modification with the court and let the judge make the change official. The sooner you file, the better — because as Hardwick v. Smith illustrates, the date you file your petition matters enormously when it comes to how far back any modification will reach.
What Is a “Substantial Change in Circumstances”?
Florida law does not allow courts to modify child support unless there has been a “substantial change in circumstances” since the last order was entered. This is a legal threshold designed to prevent parents from running back to court every time something minor changes in their lives.
What qualifies as substantial? Florida courts have recognized many situations, including:
- A significant increase or decrease in either parent’s income
- A change in the child’s needs, such as new medical or educational expenses
- A change in the child’s primary residence
- A parent’s failure to exercise court-ordered timesharing
- A substantial change in the cost of child care or health insurance
The last two points on that list are especially relevant to the Hardwick case, which turned on the question of what happens when a parent stops exercising court-ordered timesharing entirely — and the child moves in with the other parent full time.
Florida Statute Section 61.30(11)(c): The Key Law
Florida has a specific statutory provision — Section 61.30(11)(c) — that addresses what happens when a noncustodial parent fails to regularly exercise their court-ordered timesharing. Under this provision, that failure is automatically deemed a substantial change in circumstances, and any resulting child support modification is retroactive to the date the noncustodial parent first stopped exercising timesharing.
This is a powerful provision. It means that if a parent walks away from their court-ordered timesharing and the child ends up living full time with the other parent, the child support obligation can be modified going all the way back to when that change first happened — not just from the date a petition is filed.
The catch — and the issue at the center of Hardwick v. Smith — is that the statute uses the word “noncustodial.” And as we will see, the trial court’s interpretation of that word led to an outcome that the appellate court ultimately found to be legally wrong.
Key Term: Retroactive Modification
Retroactive modification means the court changes a child support obligation going backward in time — not just from the date of the new order. If a court retroactively modifies support to a date six months ago, any overpayments made during that period can potentially be recovered or credited against future obligations.
The Hardwick v. Smith Case: What Happened
The Original Arrangement
Eric Hardwick and Christie Smith are the parents of a minor child. When they separated, they established a timesharing arrangement in 2006 in which the child lived primarily with Christie — the mother. Eric had the child every other weekend and on Tuesday nights. As the parent with less timesharing, Eric paid monthly child support to Christie, as is typical when one parent carries the majority of the parenting burden.
This arrangement remained in place for roughly fourteen years. Then, in March 2020, everything changed — but not through the courts.
The Informal Switch
By agreement between the parties — not through any formal court order — the child began living with Eric full time starting in March 2020. Christie stopped exercising her court-ordered timesharing. The child’s primary home, daily care, meals, school logistics, medical appointments, and all the other responsibilities of day-to-day parenting shifted entirely to Eric.
Here is the critical detail: despite this dramatic change in the real-world living situation, Eric continued paying child support to Christie for over a year and a half before he took any legal action. He did not file a petition to modify child support until 2021 — more than eighteen months after the child moved in with him.
This delay would become the central legal battleground of the case.
What the Trial Court Decided
When Eric’s petition finally came before the court, the trial judge faced a question: if Eric is entitled to a modification of his child support obligation, how far back should that modification reach?
Eric argued that it should go back to March 2020 — the date his child first moved in with him full time and Christie stopped exercising timesharing. Christie had been receiving child support for eighteen-plus months during which she was not the primary caretaker of the child. Eric wanted credit for that.
The trial court disagreed. The judge granted Eric a modification, but only retroactive to 2021 — the date he filed his petition. The court’s reasoning was based on the language of Section 61.30(11)(c), which applies to the “noncustodial parent” who fails to exercise timesharing. Because the original 2006 order designated Christie as the primary custodial parent and Eric as the secondary (noncustodial) parent, the trial court concluded that Eric was the noncustodial parent — not Christie. Since Eric was the noncustodial parent, the statute did not apply to Christie’s failure to exercise her timesharing, and retroactive modification back to March 2020 was not available.
It was a technically logical reading of the statute. But the appellate court found it to be wrong.
What the Appellate Court Decided — and Why It Matters
The Court’s Core Legal Finding
The Florida First District Court of Appeal reversed the trial court’s ruling and ordered retroactive modification going all the way back to March 2020 — the date Christie first stopped exercising her court-ordered timesharing and the child moved in with Eric.
The court’s reasoning centered on one key question: what does “noncustodial” actually mean?
The trial court had answered that question by looking backward — to the original 2006 custody order, which designated Christie as the primary custodial parent. But the appellate court took a fundamentally different approach. It looked at the real-world situation at the time of the change.
“In determining which parent is ‘custodial’ versus ‘noncustodial’ under Section 61.30(11)(c), we consider the parties’ real-life situation and who is caring for the minor child. The party who is caring for and providing for the child’s basic everyday needs is the ‘custodial’ parent.” — Hardwick v. Smith, Florida First DCA (2023)
This is a meaningful shift in how the statute is interpreted. The court was saying: we do not freeze the labels “custodial” and “noncustodial” at the moment of the original order. We look at who is actually functioning as the custodial parent right now — who is meeting the child’s daily needs, providing shelter, food, stability, and care.
Under that analysis, the answer was clear. Once the child moved in with Eric full time in March 2020, Eric became the custodial parent. Christie — who had been the original primary custodian but was no longer exercising any timesharing — became the noncustodial parent. And when Christie, as the newly noncustodial parent, failed to regularly exercise her court-ordered timesharing, Section 61.30(11)(c) was triggered. Retroactive modification all the way back to March 2020 was therefore required.
The Knight v. Knight Precedent
The appellate court found support for its approach in an earlier case called Knight v. Knight, decided by the same court in 2017. In that case, the parties originally had equal timesharing — so neither was technically “noncustodial” under the original order. When the father stopped exercising his timesharing and the mother effectively had full custody, the court had to determine who was then noncustodial for purposes of the retroactive modification statute.
The court in Knight concluded that the father, by abandoning his timesharing, had become the noncustodial parent — and retroactive modification was appropriate. The Hardwick court applied the same logic: the label that matters is not what the original order said, but what the real-world custody arrangement actually looks like after one parent stops exercising their timesharing.
What the Court Did Not Decide
It is worth noting what the appellate court left for the trial court to sort out on remand. While it ordered retroactive modification back to March 2020, it did not dictate the exact dollar amount of the modified support. That calculation would still need to account for the financial circumstances of both parents — their respective incomes, the child’s needs, and other relevant factors under Florida law.
The statute also allows the court to consider the other parent’s low income and ability to maintain basic necessities. So even though Christie was entitled to less support going forward, the actual retroactive calculation might be nuanced depending on her financial situation during that period. This is why having an experienced Tampa family law attorney involved in these proceedings matters — the details of the calculation can significantly affect the final outcome.
What This Ruling Changes
Courts should now look at the real-world custody situation — not just the original court order — to determine who is “custodial” and who is “noncustodial” for purposes of retroactive child support modification. If a parent stops exercising timesharing and the child moves in with the other parent, the parent who abandoned timesharing can be treated as noncustodial, triggering retroactive modification rights for the parent who took over full-time care.
Practical Takeaways: What This Means If You Are a Florida Parent
The Hardwick decision is not just interesting legal history — it has real practical implications for parents across Florida, including here in the Tampa Bay area. Here is what you need to know.
1. File Your Modification Petition as Soon as Circumstances Change
The single most important lesson from Hardwick is this: do not wait. Even though the appellate court ultimately granted retroactive modification back to March 2020, Eric Hardwick still lost over eighteen months of potential relief because he delayed filing his petition. Had the trial court’s ruling stood, he would have received no retroactive modification at all.
The moment your child’s living situation changes significantly — whether they move in with you full time, or the other parent stops exercising their court-ordered timesharing — consult with a Florida divorce attorney immediately. Filing a petition promptly protects your rights and preserves your ability to seek retroactive relief.
2. Informal Agreements Don’t Protect You Legally
Eric and Christie made an informal agreement between themselves that the child would live with Eric. There was no court order reflecting that change. For over a year and a half, the old order stayed in place — and so did Eric’s child support obligation.
This is an extremely common situation, and it causes real financial harm to parents who, in good faith, are doing the right thing by taking care of their child. Courts respect parties’ ability to cooperate informally, but informal agreements do not modify court orders. If your timesharing arrangement changes in a material way, formalize it through the court as quickly as possible.
This is especially important if the change in timesharing results in a change in who should be paying child support — and how much.
3. “Custodial” Means Who Is Actually Doing the Parenting — Not Just What the Old Order Says
The Hardwick court’s interpretation of “custodial” has broader implications than just child support modification. It reflects a general principle in Florida family law: courts care about what is actually happening in a child’s life, not just what a years-old order says on paper.
If your ex-spouse has effectively handed you full custody of your child — even without a formal court order — you may have more legal rights than you realize. Those rights include the ability to seek retroactive modification of child support, the ability to request a formal change to the timesharing order reflecting the new reality, and potentially the ability to seek attorney’s fees if the other parent’s conduct drove up your legal costs.
4. The Paying Parent Still Has Obligations Until the Court Says Otherwise
Here is the flip side of the Hardwick ruling that paying parents need to understand: even if your child has moved in with you full time, you are not legally permitted to simply stop paying child support. The old order is still valid until a court changes it. Unilaterally stopping payments — no matter how logical it seems — can result in contempt of court, wage garnishment, and other serious consequences.
The correct approach is to continue paying as ordered while simultaneously filing a petition for modification as quickly as possible. If the court ultimately grants retroactive modification going back to the date of the change, any overpayments you made during the interim period can be credited or refunded — but only if you have followed the proper legal process.
5. Document Everything
If your child’s living situation changes informally, start documenting from day one. Keep records of:
- Text messages or emails from the other parent acknowledging that the child is living with you
- School enrollment records showing your address
- Medical appointment records
- Any communications about the agreed-upon change in living arrangements
- Receipts for child-related expenses you are now bearing
This documentation can be invaluable if there is ever a dispute about when the change in custody actually occurred — which is exactly the kind of factual question that retroactive modification cases often turn on.
6. Retroactive Modification Has Real Financial Consequences — for Both Sides
If you are the parent who moved in and took full-time care of your child, retroactive modification can mean recovering months or even years of child support overpayments. That can be a significant sum of money that you are entitled to.
If you are the parent who stopped exercising timesharing, retroactive modification can result in a substantial debt — potentially owed back to the other parent for the period during which you received child support while not caring for the child. It can also affect marital asset division in certain contexts, particularly if the divorce or financial matters are still pending.
Either way, the financial stakes are high enough that having an experienced Tampa family law attorney by your side is not just helpful — it is essential.
The Bigger Picture: How Child Support and Timesharing Work Together in Florida
Florida’s Child Support Guidelines
Florida uses a detailed formula — set out in Section 61.30 of the Florida Statutes — to calculate child support obligations. The formula considers each parent’s net monthly income, the number of overnights each parent has with the child, the cost of health insurance for the child, and the cost of child care. When timesharing changes significantly, the support calculation can change dramatically as well.
For example, a parent who has the child for 20% of overnights in a year pays more support than one who has the child for 50% of overnights. A parent who goes from 20% to 100% of overnights — as happened with Eric Hardwick — would see a complete reversal in who owes child support to whom. These are not small adjustments. They can mean hundreds or even thousands of dollars per month.
Why Timesharing Schedules Need to Be Kept Current
One of the lessons of Hardwick v. Smith — and of Florida family law generally — is that timesharing schedules need to be kept legally current. When a schedule becomes outdated because of a real-world change that neither party has formalized, it creates a legal vacuum that can harm the parent who is doing the actual caregiving.
This is particularly common in cases involving teenagers, who often have strong preferences about where they live and may effectively vote with their feet — moving to the other parent’s home without any formal legal process. When that happens, the financial support structure often lags behind reality, sometimes by years, until someone finally goes to court.
Proactive legal management of your timesharing arrangement — working with a skilled Florida divorce attorney to keep your orders current as your family’s circumstances evolve — is one of the most cost-effective investments you can make in your family’s stability.
What Happens When Both Parents Agree to a Change
Even when both parents are in complete agreement about a change to timesharing and child support, a formal court order is still necessary to make the change legally binding. Parties can reach an agreement through negotiation or mediation and then submit it to the court for approval. Once a judge signs the agreed order, it becomes enforceable — and any future violations of it carry legal consequences.
Going through a formal process may feel like extra work when both parents are cooperative. But it protects both of you. It protects the paying parent from claims of unpaid support under the old order. It protects the receiving parent from the risk that the other parent will later claim the informal agreement was not binding. And it protects the child, whose financial security depends on a clear, enforceable legal structure.
The Role of the Department of Revenue in Florida Child Support Cases
It is worth noting that in Hardwick v. Smith, the Florida Department of Revenue’s Child Support Enforcement program was involved as a party. This is common in Florida child support cases, particularly where the state has an interest in ensuring support is being properly paid and collected.
If you receive public assistance in Florida, the Department of Revenue may become a party to your child support case automatically. Even if you do not receive public assistance, either parent can request the Department’s services for enforcement purposes. Understanding the Department’s role — and how it interacts with your own legal rights and strategies — is another area where having experienced Tampa family law counsel can make a meaningful difference.
Why The McKinney Law Group Is the Right Choice for Your Tampa Family Law Needs
Child support modification cases might sound like a narrow legal topic, but as Hardwick v. Smith illustrates, the financial consequences can be enormous — and the legal issues can be surprisingly complex. Knowing which statute applies, how courts interpret key terms like “custodial” and “noncustodial,” when and how to file a petition, and how to document a change in circumstances: all of these questions require experienced, informed legal guidance.
At The McKinney Law Group, our Tampa family law attorneys have deep experience handling child support modifications, timesharing disputes, and all aspects of Florida divorce and post-divorce litigation. We serve clients throughout the Tampa Bay area, including Hillsborough County, Pinellas County, and Pasco County.
When you work with us, you can expect:
- Straightforward, plain-English advice about your legal rights and options — never confusing jargon.
- Prompt action to protect your interests from the moment you contact us. In child support cases, timing matters.
- Thorough documentation strategies to build the strongest possible record for your modification petition.
- Skilled negotiation to resolve disputes efficiently wherever possible, saving you time and money.
- Aggressive advocacy in court when negotiation is not enough and your rights need to be defended before a judge.
- Compassionate, personalized service because we understand that behind every legal matter is a real family navigating a genuinely difficult situation.
We know that you are not just looking for legal representation — you are looking for someone who will listen, who will explain what is happening, and who will fight for the outcome that is right for you and your child. That is exactly what The McKinney Law Group is here to provide.
Conclusion: Don’t Wait — Protect Your Child Support Rights Today
The 2023 decision in Hardwick v. Smith is a win for Florida parents who step up and provide full-time care for their children when the other parent steps back. It confirms that the law looks at real-world custody — not just what an old court order says — when determining who is entitled to retroactive child support modification.
But the case is also a cautionary tale. Eric Hardwick waited over eighteen months to file his petition. Had the trial court’s ruling been the final word, that delay could have cost him all retroactive relief entirely. He was fortunate that the appellate court got it right. Not every case has that outcome.
If your timesharing arrangement has changed — whether your child has moved in with you full time, or the other parent has stopped exercising their court-ordered parenting time — do not wait to get legal advice. The sooner you act, the better your position will be.
The McKinney Law Group’s experienced Tampa divorce lawyers are ready to help you understand your rights, build your case, and pursue the child support modification you deserve. We offer confidential consultations so you can get clear answers without any pressure or obligation.
Your child’s financial security — and your own — is too important to leave to chance or to delay.
Written by Damien McKinney, Founding Partner
Damien McKinney is the Founding Partner of The McKinney Law Group, bringing nearly two decades of experience to complex marital and family law matters. He is licensed in both Florida and North Carolina and has been repeatedly recognized as a Rising Star by Super Lawyers.