You can ask a Hillsborough County court to change child support, alimony or a parenting plan after a divorce if circumstances have substantially changed, and you can often reach the new terms in mediation first. Florida law sets different tests for each type of change, and in Hillsborough County a contested post-judgment case cannot be set for a hearing until the parties have been through mediation, so an agreed modification is usually the shorter route.
Life after divorce rarely stays still. A new job takes one parent across town to a different school district. A spouse who spent years paying alimony retires. A child who thrived in a shared weekly schedule is now fourteen and asking for a change. A co-parent's income drops after a layoff, and the original child support figure no longer works for anyone. This guide explains when Florida law allows a modification, how child support, alimony (including retirement) and parenting plan changes each work, what the 2023 reforms changed, and how a mediated agreement gets turned into a court order in Tampa.
When Florida Law Allows a Post-Divorce Modification
Three statutes cover most post-divorce changes: Florida Statute 61.13 for parenting plans and timesharing, Florida Statute 61.14 for alimony and support, and Florida Statute 61.30 for the child support guidelines. Each starts from the same idea: the original order is not frozen, but something real must have changed since it was entered. The details differ by type of change.
For alimony, section 61.14(1)(a) allows a court to act when "the circumstances or the financial ability of either party changes" after the order or agreement, and to modify "as equity requires." A change can be made retroactive to the date the modification petition was filed. Florida appellate case law has long described the required change as one that is substantial, material, involuntary, permanent in nature and not reasonably anticipated when the original order was signed - the practical meaning of each element is below.
- Permanent or long-term. A temporary pay cut during a slow quarter does not qualify. A lasting job loss, a serious medical condition or genuine retirement generally does.
- Material. The change must be significant enough that enforcing the original order would be unfair. Minor income fluctuations fall below this threshold.
- Involuntary. Courts will not reward a paying spouse who deliberately lowers income to lower a support obligation.
- Not reasonably anticipated. If both spouses knew a change was coming when they divorced - a planned retirement, for example - the original agreement was expected to account for it.
For parenting plans, section 61.13(3) says a parenting plan or timesharing schedule may not be modified without "a substantial and material change in circumstances," and the court must also find that the change serves the child's best interests. The word "unanticipated" is no longer in that standard: CS/HB 1301 (Chapter 2023-301, effective July 1, 2023), a companion to the alimony bill, removed the requirement that the change be unanticipated. The same law created a rebuttable presumption that equal timesharing is in a child's best interests, which can matter when a parent asks to move from a majority-time schedule toward an equal one.
For child support, the guidelines themselves can prove the change, as explained in the next section.
Events that commonly support a modification in Tampa include a significant income shift for either parent, retirement, remarriage or a supportive relationship for a recipient spouse, a child developing new educational or medical needs, a substantial change in a parent's work schedule, and a teenager's consistent, well-reasoned preference about where to live.
Child Support Modification Mediation in Tampa
To modify child support in Florida, the new guideline amount must differ from the current order by at least 15 percent or $50 per month, whichever is greater. Mediation is where Tampa parents usually test that math together: you exchange current income, timesharing, health insurance and childcare numbers, rerun the statutory worksheet, and sign a written agreement for the court to approve.
Florida Statute 61.30(1)(b) says the difference between the existing monthly obligation and the guideline amount must reach that level before it counts as a substantial change in circumstances. A separate provision, 61.30(1)(c), lets the Florida Department of Revenue seek a modification without proving a change in circumstances when an order differs from the guideline amount by at least 10 percent but not less than $25. That lower figure applies to department-reviewed cases, not to a typical private modification between two parents.
The guidelines use both parents' net incomes, the number of overnights, health insurance costs and childcare expenses. Reasons Tampa parents typically seek a child support change include:
- A significant change in either parent's income - a job loss, a promotion, a return to the workforce or a career change
- A material change in the timesharing schedule, because overnights feed directly into the formula. Under section 61.30(11)(b), a parent who has at least 20 percent of the overnights of the year qualifies for the shared-time adjustment
- A parent not using the court-ordered timesharing that the support figure was built on. Section 61.30(11)(c) treats this, when it is not caused by the other parent and led to a support adjustment, as a substantial change in circumstances
- A significant change in childcare costs, such as a child starting school or needing aftercare
- A substantial change in the child's health insurance premium, or a medical or developmental condition with ongoing expenses
If the recalculated figure falls inside the threshold, a court is unlikely to modify on guideline grounds alone. Parents can still agree on a different amount in mediation, but any agreed figure has to be consistent with Florida's guidelines and the child's needs, and the judge must approve it.
One caution comes up regularly: if a parent voluntarily reduces income, Florida courts can impute income based on earning capacity rather than actual earnings. Mediation cannot override imputation rules, but it can help both parents reach an honest, realistic picture of income and a figure they both consider workable. For how support is first set during a divorce, see the guide to child support in a Tampa divorce mediation.
Plan for the end date too. Under section 61.30(1)(a), the guidelines extend to a child between 18 and 19 who is still in high school and performing in good faith with a reasonable expectation of graduating before turning 19. Children with documented disabilities may be treated differently. A mediated modification is a good moment to write down how and when support steps down, instead of leaving a cliff edge for one parent.
Modifying or Ending Alimony, Including at Retirement
Florida's 2023 alimony reform, CS/SB 1416 (Chapter 2023-315, approved June 30, 2023, effective July 1, 2023), changed what courts may award and added an express statutory path for retirement-based modification. Retirement is a ground to ask a court to reduce or end alimony, not an automatic stop. The paying spouse must file, prove the case and meet statutory conditions.
Under section 61.14(1)(c), a court may reduce or terminate alimony on specific written findings if the paying spouse:
- has reached "normal retirement age as defined by the Social Security Administration" (or the customary retirement age for their profession), and
- has taken demonstrative and measurable steps to retire or has actually retired.
The paying spouse carries the burden of proving, by a preponderance of the evidence, that retirement reduces his or her ability to pay. If the court finds that it does, the burden shifts to the recipient to show that the obligation should not be reduced or ended. The court weighs statutory factors, including the payer's age and health, the type of work, the reasons for retiring and the likelihood of returning to work, the recipient's needs and ability to self-support, the parties' assets and income, and whether the payer has complied with the existing obligation.
A payer may file "in reasonable anticipation of retirement, but not more than 6 months before retirement," and a retirement-based change takes effect when the retirement is reasonable and voluntary as determined under those factors. The statute does not limit this provision to orders from after July 1, 2023, but whether it reaches a particular older judgment or settlement agreement is a question for a Florida family law attorney, who will need to read the order itself.
Other 2023-era rules worth knowing before negotiating alimony:
- Durational alimony length. Under section 61.08, durational alimony may not exceed 50 percent of the length of a short-term marriage (under 10 years), 60 percent for a moderate-term marriage (10 to 20 years) and 75 percent for a long-term marriage (20 years or more). The statute lists temporary, bridge-the-gap, rehabilitative and durational alimony as the available types.
- Who the new rules apply to. Section 61.08(11) says the court applies that section to initial petitions for dissolution of marriage or support filed on or after July 1, 2023. A judgment from an earlier case is not rewritten on that basis.
- Modifying durational alimony. The amount "may be modified or terminated based upon a substantial change in circumstances," but its length may not be modified except under exceptional circumstances.
- Remarriage. Section 61.08 provides that bridge-the-gap and durational alimony end on the death of either party or the remarriage of the recipient.
- Supportive relationship. Under section 61.14(1)(b), a court must reduce or terminate alimony on specific written findings that a supportive relationship exists or existed. The paying spouse bears the initial burden of showing that it existed within the 365 days before the petition was filed, and the burden then shifts to the recipient.
- Income changes. A substantial, involuntary drop in the payer's income, or a substantial rise in the recipient's income or earning capacity, can also support a change under the general standard.
Alimony modifications are often the most emotionally loaded post-divorce disputes. One spouse believes the other is hiding income; the other believes the recipient is cohabiting while staying off the lease. Mediation does not require anyone to trust the other or agree about the past. It gives them a structured setting to negotiate a defined financial question with a neutral facilitator. For background on the reform itself, read the guide to Florida alimony reform for Tampa couples, and for couples later in life see the gray divorce guide.
Modifying a Parenting Plan in Tampa
Florida does not use the words "custody" or "visitation." The operative terms are "timesharing" and "parenting plan." A parenting plan governs where children live, how major decisions are made, and how parents share holidays, school breaks and day-to-day logistics. For many Tampa families, the plan drafted at the time of divorce no longer reflects real life two, three or five years later.
The court may modify a plan only on a showing of a substantial and material change in circumstances and a finding that the modification serves the child's best interests. Section 61.13(3) directs the court to evaluate all factors affecting the welfare and interests of the particular child and lists them in paragraphs (a) through (t). They include each parent's willingness to support the child's relationship with the other, the stability and geographic proximity of the households, each parent's health and the child's developmental needs. The child's "reasonable preference" is also a factor, but only if the court finds the child "of sufficient intelligence, understanding, and experience to express a preference." No statute sets a cutoff age, so a teenager's wishes carry more weight as maturity grows but are never controlling on their own.
Common grounds for parenting plan modifications among Tampa families include:
- A parent taking a job with a very different schedule - shift work, heavy travel or remote work - that makes the current timesharing arrangement unworkable
- A child starting at a magnet, specialized or charter school in a different part of Hillsborough County, changing the transportation picture
- A parent remarrying or a new sibling arriving, changing the household in ways the original plan did not anticipate
- A teenager consistently and clearly expressing a preference to adjust their primary residence
- A parent developing a substance abuse problem, serious illness or other condition that genuinely affects parenting capacity
Many Tampa co-parents informally adjust schedules over the years without updating the court order. That flexibility is understandable, but an informal arrangement that differs from the court-approved plan can cause trouble if the relationship deteriorates or one parent later seeks a formal change. Putting a working arrangement into a mediated modification is cleaner and more protective. The guide to Florida parenting plan mediation in Tampa explains what a plan must contain.
Moves are handled separately. Under Florida Statute 61.13001, a relocation is a change of a parent's principal residence of at least 50 miles for at least 60 consecutive days; it does not have to cross a state line. Parents can agree to a relocation in a signed written agreement, but if a court order already covers timesharing the parties must still ask the court to approve the agreement. Without agreement, the parent who wants to move must file a sworn petition, and the other parent has 20 days after service to file a written objection. See parental relocation after divorce in Tampa for the full process.
Why Mediation Is the Right Tool for Post-Divorce Modifications in Tampa
The 13th Judicial Circuit's Family Mediation page states that all post-judgment family law cases "must participate in mediation before a hearing can be scheduled" with a judge or general magistrate. If you file a Supplemental Petition for Modification and the other side contests it, you will end up in mediation either way. The question is whether you get there voluntarily first, or after months of filings and escalating legal fees.
Starting with mediation has concrete advantages. It is typically faster, because you are not waiting for a hearing date. It tends to cost less, because neither side has to build a litigation case. It is less damaging to co-parenting, because the two of you are solving a problem together rather than positioning through lawyers. And it lets you fix several linked issues at once: a change in income usually affects both child support and alimony, and a change in timesharing affects both the parenting plan and the child support calculation. One agreement can cover all of it instead of sequential motions and hearings.
A contested modification case can take many months from filing to final hearing, depending on the court's calendar and how hard either side fights, and attorney fees for each side can run into the thousands of dollars. Exact figures vary by firm and case, so check with Tampa-area family law attorneys for current rates. Mediation commonly resolves a focused modification in a small number of sessions.
What does court-connected mediation cost? As of November 2026, the 13th Circuit's Mediation and Diversion Services lists a flat fee per party based on combined gross annual income: $60 each if combined income is $50,000 or less, and $120 each if it is higher, with a fee waiver possible for indigent parties. Private mediators set their own rates; see the pricing guide for how mediation fees work generally.
How the Modification Mediation Process Typically Works
- Describe what changed. Each parent explains what has changed since the divorce and which terms need to change. This tells the mediator the scope and which documents to gather.
- Gather documents. For income-based modifications, bring recent pay stubs, tax returns and proof of the change: layoff paperwork, new employment records, retirement verification, updated insurance costs. For parenting changes, bring each parent's schedule, the child's school and activity calendar, and the proposed new arrangement. The guide on how to prepare for divorce mediation in Tampa has a fuller checklist.
- Work through the issues. The mediator helps each side understand the legal framework, identify what each person genuinely needs and move toward terms both can accept.
- Sign a written agreement. Agreed terms are written precisely enough for the court to adopt as an order.
- File with the court. The agreement is submitted with a Supplemental Petition for Modification and a proposed order for the judge's signature. When the parties agree, the judge often reviews the paperwork without a contested hearing, though the court may still require something further. The change is not effective until the judge signs.
The general mechanics of a Florida mediation session are covered in how divorce mediation works in Florida.
Filing a Modification in Hillsborough County: Practical Details
Modification petitions in Tampa are filed with the Hillsborough County Clerk of Courts and heard in the 13th Judicial Circuit's family division. The filing is called a Supplemental Petition for Modification. It is separate from the original divorce petition and must state the substantial change in circumstances and the relief requested.
The circuit's Family Mediation page gives the address of Mediation and Diversion Services as 800 E. Twiggs Street, Suite 208, Tampa, and says parties can request family mediation themselves or the court can order it. Confirm current procedures with the circuit, as they change.
Self-represented (pro se) litigants may file modifications. In Hillsborough County, Bay Area Legal Services runs free family law self-help programs, including a Family Forms Clinic at the George Edgecomb Courthouse; volunteers there cannot give legal advice or represent anyone in court, and clinic hours change, so check before going. If you are changing an existing order, bring the case number and a copy of the order. See filing a Florida divorce without a lawyer for the general self-represented path. Filing fees change, so confirm the current schedule with the Hillsborough County Clerk of Courts (hillsclerk.com) before filing.
Frequently Asked Questions
What counts as a substantial change in circumstances in Florida?
It depends on what you are changing. For alimony under section 61.14, the change must be real and lasting, and Florida case law adds that it be material, involuntary and not reasonably anticipated. For a parenting plan under section 61.13, you need a substantial and material change that serves the child's best interests, and since July 1, 2023 it no longer has to have been unanticipated. For child support, a gap of at least 15 percent or $50 a month between the current order and the guideline figure counts, whichever is greater.
Can I modify child support in Tampa through mediation?
Yes. Parents can negotiate a new support figure in mediation, then submit the signed agreement with a Supplemental Petition for Modification for the judge to approve. The new amount must be consistent with the guidelines in section 61.30 and the child's needs. If one parent will not agree, you can still file, and the 13th Circuit requires mediation before a contested post-judgment hearing.
Can a paying spouse stop alimony when they retire?
Not automatically. Under section 61.14(1)(c), the paying spouse must petition the court, must have reached normal retirement age as defined by the Social Security Administration (or the customary age for their profession), and must have taken measurable steps to retire or actually retired. The court then weighs statutory factors in writing. The payer may file no more than 6 months before retirement. Until a court order or a signed, court-approved agreement changes the obligation, the existing order stays in force.
How long does a modification take through mediation compared with court?
An agreed modification can move quickly once both parents have signed, with the remaining time depending on the court's calendar for approving the order. A contested case in the 13th Judicial Circuit can take many months, and mediation must come first anyway. That gap matters most in parenting plan disputes, where prolonged conflict is hard on children and on the co-parenting relationship.
Can I modify a parenting plan if my co-parent refuses to participate?
Yes. You can file a Supplemental Petition for Modification even if your co-parent will not negotiate. The circuit requires mediation before a contested post-judgment hearing, so mediation will take place at some point. If it does not produce an agreement, a judge decides based on the child's best interests.
Does Florida's 2023 alimony reform affect my existing alimony order?
The new alimony rules in section 61.08, including the durational caps, apply to initial petitions filed on or after July 1, 2023, so an older judgment is not rewritten. The retirement provision in section 61.14(1)(c) is part of the modification statute and is not written as limited to new cases, but how it applies to a specific older order or settlement agreement is a question for a Florida family law attorney.
How much does post-divorce modification mediation cost compared to going back to court?
Private mediators set their own fees, and the pricing guide explains how fees generally work. As of November 2026, the 13th Circuit's court mediation program lists $60 per party for combined gross income up to $50,000 and $120 per party above that. A contested modification typically costs each side attorney fees in the thousands of dollars at minimum, and complex disputes cost considerably more. Verify current rates with Tampa-area family law firms.
Do I still need a lawyer if I use mediation to modify my divorce agreement?
Mediators are neutral facilitators. They do not represent either party and cannot give legal advice. For straightforward changes where both parents understand Florida's standards and substantially agree, many people complete the process without attorneys. If the change involves significant financial complexity, a possible relocation, safety concerns or real uncertainty about how Florida law applies to your facts, consult a Florida family law attorney before or during mediation. The mediator helps you reach an agreement; an attorney helps you judge whether it protects your legal interests.
Can a modification be made retroactive?
Sometimes. Under section 61.14(1)(a), a court may modify support retroactively to the date the modification petition was filed, as equity requires. A change cannot be assumed to reach back before filing, which is one reason not to wait once your circumstances have changed.
If your circumstances have changed since your divorce, a Florida family law attorney can tell you whether a modification of your parenting plan, child support or alimony is available, and a Florida Supreme Court certified family mediator can explain how mediation would work. For more background, read the complete guide to divorce mediation in Florida. Statutes cited above are available from the Florida Legislature at section 61.14 and section 61.30. This guide is general information, not legal advice.