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Florida Child Support Basics: How It's Calculated and What to Expect

February 28, 20268 min readBy Yvette B. Reyes, Esq.

Florida child support is not set by a judge's opinion of what feels fair. It comes out of a formula in section 61.30 of the Florida Statutes, and in most cases the number the formula produces is the number in the order. Knowing how the formula works lets you predict your own result before you ever walk into a courtroom.

The income shares model, in plain terms

Florida uses an income shares model. The idea behind it is that a child should receive roughly the same share of parental income they would have received if the parents lived together.

The calculation runs in a fixed order. Both parents' net monthly incomes are added together. That combined figure is looked up in the statutory guideline chart, along with the number of children, to produce a total support obligation. Each parent is then responsible for their percentage share of that total, based on their share of the combined income. Finally the schedule is applied, and one parent pays the other.

What counts as income

Gross income under section 61.30 is broad. It is not just salary:

  • Wages, salary, overtime, commissions, bonuses, and tips
  • Self-employment and business income, after ordinary and necessary expenses
  • Disability benefits, workers' compensation, and unemployment compensation
  • Pension, retirement, and annuity payments
  • Social Security benefits, other than SSI
  • Rental income, net of expenses
  • Interest, dividends, royalties, trust income, and recurring gains
  • Spousal support received from a previous marriage

From gross to net: the allowed deductions

The guideline works on net income, and the statute is specific about what comes off the top. Allowed deductions include federal, state, and local income tax actually paid, FICA or self-employment tax, mandatory union dues, mandatory retirement contributions, health insurance premiums excluding the cost for the child, court-ordered support for other children actually paid, and spousal support paid under a prior order.

What is not deductible matters just as much: rent or mortgage, car payments, credit card debt, and ordinary living expenses do not reduce net income for this calculation.

How overnights change the number

The schedule feeds directly into the money. When a parent exercises at least 20 percent of the overnights in a year, which is 73 nights, the gross-up formula in section 61.30(11)(b) applies and the paying parent's obligation typically drops.

Because Florida now presumes equal timesharing, a large share of new orders run through the gross-up calculation, and the support number is often much lower than parents expect from the base chart alone.

The add-ons that sit on top of the base

The guideline amount is not the whole obligation. Certain costs are added to the calculation and split by the same income percentages:

  • Health insurance premium attributable to the child
  • Work-related or education-related child care costs
  • Recurring uncovered medical, dental, and prescription expenses

When a court can leave the guideline

A judge may vary from the guideline amount by up to five percent after considering the needs of the child and the circumstances of the parents. Going further than five percent requires written findings explaining why the guideline amount would be unjust or inappropriate.

Extraordinary medical needs, a special-needs child, a substantial disparity in the costs of the two homes, and independent income of the child are among the reasons the statute recognizes.

How long it lasts

Florida child support generally runs until the child turns 18. It continues to 19 if the child is still in high school with a reasonable expectation of graduating, and it can continue indefinitely for a child who is dependent because of a mental or physical incapacity that began before age 18.

New Florida orders are required to state when support ends and what the amount becomes when there is more than one child, so parents are not forced back into court at each birthday.

Questions about your own case?

Yvette B. Reyes, Esq. offers a free first consultation, in English or Spanish, for families across South Florida and the Treasure Coast.

Common questions

Not freely. Child support belongs to the child, and a judge reviews any agreed amount against the guideline. A deviation of more than five percent requires written findings that the guideline amount would be unjust or inappropriate.

No. With equal overnights the gross-up formula applies, but if the parents' incomes differ, the higher earner usually still pays. Only similar incomes plus equal time produce a near-zero result.

Usually yes, when it is regular and continuing. Courts look at a history, often two years, and may exclude overtime that is genuinely sporadic and unlikely to continue.

A court can impute income based on recent work history, qualifications, and prevailing local earnings when a parent is voluntarily unemployed or underemployed. Support is then calculated on the imputed figure.

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This article is general information about Florida law, not legal advice about your situation, and reading it does not create an attorney-client relationship. Florida law changes, and every case turns on its own facts. Full disclaimer.

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