Child Support Modification in Miami-Dade: How to Qualify and What to File

If your financial situation has changed or your child’s needs have increased, your current child support order may no longer reflect reality. In Miami-Dade County, Florida law allows parents to request a child support modification, but only if they can prove a substantial change in circumstances and follow the correct legal process. Whether your income has dropped, time-sharing has shifted, or expenses have increased, understanding how modification works can help you avoid costly mistakes and protect your financial stability.

What Is a Substantial Change in Circumstances for Child Support in Florida? To modify a child support order in Florida, the requesting parent must demonstrate a substantial change in circumstances under Florida Statute § 61.30. The change must be significant, material, and ongoing — not temporary or minor. Florida sets a numerical threshold: the difference between the current support amount and what the guidelines would produce today must be at least 15 percent or $50 per month, whichever is greater. That figure is a floor, not a ceiling — you still need to show what caused the gap.

What Qualifies for Child Support Modification in Florida?

Courts most commonly grant modification based on the following:

Change in income. A significant increase or decrease in either parent’s income is the most common basis — job loss, a substantial raise, disability, retirement, or a return to the workforce. Courts look at whether the change is ongoing. A temporary dip during a brief unemployment period is treated differently than a permanent reduction in earning capacity. The change must generally be involuntary — a parent who voluntarily reduces income to avoid support obligations will not receive the same consideration.

Change in time-sharing. Florida’s child support formula accounts for how many overnights each parent has with the child. If actual time-sharing has changed significantly from what was in the original order, that shift can justify a modification. Under § 61.30(11)(c), if a parent fails to regularly exercise their court-ordered time-sharing — and that failure was not caused by the other parent — the court treats this as a substantial change in circumstances as a matter of law. A modification under this provision can be made retroactive to the date the parent first stopped exercising their scheduled time.

Changes in the child’s needs. Extraordinary medical, psychological, educational, or dental expenses can support a modification under § 61.30(11)(a). Courts do not expect parents to return to court for routine costs, but a significant diagnosis, change in educational placement, or major ongoing medical expense may justify revisiting the support amount.

Change in childcare or health insurance costs. Florida’s child support calculation incorporates childcare costs and health insurance premiums for the child. If these figures have changed substantially — a parent lost employer-sponsored coverage, or childcare costs have increased significantly — that change can factor into a modification request.

If the circumstances in your case have shifted in any of these ways, early legal guidance can make a meaningful difference in how your petition is structured and presented. Contact our office for a free case evaluation.

How to File for Modification in Miami-Dade County

A motion alone is not sufficient. To request a modification in Miami-Dade, you must file a Supplemental Petition to Modify Child Support with the Clerk of the Circuit Court, Family Division. Filing a motion rather than a petition is a common mistake that delays cases.

The main courthouse is at 175 NW 1st Avenue, Miami, FL 33128. Filing is also available at satellite courthouses in Hialeah, Homestead, and North Dade, and through the Florida Courts E-Filing Portal.

Along with the Supplemental Petition, you will need:

• Family Law Financial Affidavit (short form if income is under $50,000 annually; long form if $50,000 or more)
• Three years of federal tax returns
• Pay stubs for the past three months
• Bank and investment account statements
• Documentation of the child’s healthcare costs and health insurance premiums
• Childcare cost documentation, if applicable

Both parties are required to provide complete financial disclosure. Incomplete or inaccurate affidavits affect the outcome of your case and your credibility with the judge.

Once filed, the other parent must be formally served through a process server. They have 20 days to file a response. If no response is filed, you may be able to proceed by default after completing the required additional steps.

What Happens While the Petition Is Pending

You must continue making child support payments according to your existing order until a court formally modifies or terminates it. Paying a reduced amount without a court order can result in contempt proceedings and back payments being owed. A pending petition does not relieve you of your current obligation.

How the Court Calculates the Modified Amount

If the court finds a substantial change in circumstances, it recalculates support using the Florida Child Support Guidelines under § 61.30. The formula accounts for both parents’ monthly net incomes, the number of overnights each parent has with the child, health insurance premiums, childcare costs, and any extraordinary expenses.

The court has limited discretion to deviate from the guideline amount. A deviation of up to 5 percent can be ordered after considering relevant factors. A deviation of more than 5 percent requires a written finding explaining why the guideline amount would be unjust or inappropriate.

Department of Revenue Cases

If your child support order is being administered by the Florida Department of Revenue (DOR), the DOR reviews orders periodically. Under § 61.30(1)(b), if the current amount differs from the guideline amount by at least 10 percent or $25 — whichever is greater — the DOR may seek a modification without requiring you to separately prove a change in circumstances. You can also request a review directly through the DOR if it has been at least three years since your order was last set or reviewed.

Frequently Asked Questions

What counts as a substantial change in circumstances for child support in Florida? A change is substantial when it is significant, material, and ongoing — and when it produces a difference of at least 15 percent or $50 per month under the Florida Child Support Guidelines. Common examples include job loss, a significant income increase for either parent, a change in time-sharing, or a major shift in the child’s medical or educational needs.

Can I modify child support if my ex now earns significantly more? Yes. A substantial increase in the other parent’s income can support a modification if it results in a difference of at least 15 percent or $50 per month under the guidelines. You will need documentation of their current income, which may require discovery or a subpoena if they are not cooperative.

Does child support change if I lose my job in Florida? Not automatically. You must continue paying under your existing order and file a Supplemental Petition as soon as possible. A modification can be made retroactive to the date the petition was filed — not the date of job loss — so acting promptly protects you from accumulating arrears under the current amount.

Can child support be modified if the other parent hides income? Yes. If you have reason to believe the other parent is underreporting income, your attorney can seek financial discovery — including subpoenas for bank records, tax returns, and business documents. Courts take income concealment seriously and have tools to impute income when a parent is found to be voluntarily underemployed or concealing earnings.

Can child support be modified by agreement between the parents? Parents can agree to different support terms, but that agreement must be approved by the court to be enforceable. An informal arrangement to pay less — or more — is not binding, and either parent can revert to the court-ordered amount at any time.

How long does the modification process take in Miami-Dade? If both parents agree on the new amount, the process can move relatively quickly once financial disclosures are exchanged. Contested modifications take longer due to discovery, potential mediation, and court scheduling. Our attorneys handle modification cases throughout Miami-Dade County and can give you a realistic timeline based on the specifics of your situation.