Florida uses a formula based on both parents' income and custody time

Florida law requires both parents to contribute to a child's living expenses in proportion to their income. The state uses a income shares model, which means the court calculates how much a child would cost in a household, then divides that cost between parents based on what each one earns. The formula accounts for how much time each parent spends with the child, the number of children involved, and certain deductions from gross income.

The calculation is not arbitrary — it follows Florida Statute 61.30, and judges must use this formula unless they document a specific reason not to. This means two cases with similar facts should produce similar support amounts, though the actual number depends on the details of each family's situation.

Key Takeaways

  • Florida calculates child support by adding both parents' adjusted gross income, finding the basic obligation from a state table, then splitting that obligation based on each parent's income percentage.
  • The calculation includes deductions for other children you support, health insurance costs, and daycare expenses, which lower the income used in the formula.
  • Custody time (called "parenting time" in Florida) directly affects the calculation — the parent with more time pays less because they are already spending money on the child.
  • Either parent can request a modification if income changes by 15 percent or more, or if there is a substantial change in custody arrangements.

The three-step process: income, obligation, and allocation

Step one is determining each parent's adjusted gross income. This starts with gross income from all sources — wages, self-employment, rental income, investment income, and others. Then you subtract specific items: federal and state income taxes, Social Security taxes, health insurance premiums for the child, court-ordered child support for other children, and spousal support you pay. The result is the number used in the formula.

Step two is finding the basic child support obligation from the state's child support guidelines table. You add both parents' adjusted gross incomes together, then look up that combined total on the table. The table shows how much it costs to raise a child (or children) at different income levels. For example, if combined adjusted income is $5,000 per month and you have one child, the table might show a basic obligation of $900 per month — but this is before you split it between parents.

Step three is allocating the obligation based on each parent's share of the combined income. If one parent earns $3,000 and the other earns $2,000 from the combined $5,000, the first parent pays 60 percent of the obligation and the second pays 40 percent. In the example above, that would be $540 and $360 per month.

How parenting time changes the calculation

The parent who spends more time with the child does not pay the full allocated amount. Florida reduces the obligation for the parent with primary custody because that parent is already spending money on housing, food, utilities, and other expenses while the child is there.

If one parent has the child more than 50 percent of the time, the other parent's obligation is reduced. The exact reduction depends on how many overnights the child spends with each parent. A parent with 40 percent of overnights pays more than a parent with 20 percent, even if their income is the same. If parents split time almost equally (close to 50-50), both parents' obligations are reduced, and the parent with higher income typically pays the difference to the other.

The court counts overnights, not just daytime hours. A child spending weekends and two weeknights with one parent has roughly 40 percent of overnights; a child there only weekends has roughly 29 percent. This is why custody arrangements matter so much to the final number.

Deductions that lower your income before calculation

Not all of your gross income counts toward child support. Florida allows deductions that reduce the income used in the formula. The most common are:

  • Health insurance for the child: If you pay the premium, you subtract it from your gross income. This applies whether the insurance is through your job or purchased separately.
  • Daycare and school costs: Reasonable childcare expenses (including preschool, after-school care, and summer programs) reduce your income. This recognizes that one parent may be paying for care so the other can work.
  • Child support for other children: If you already pay court-ordered support for a child from another relationship, that amount comes out of your income before the calculation.
  • Spousal support: If you pay alimony to an ex-spouse, that reduces your income.
  • Taxes: Federal and state income tax, Social Security tax, and Medicare tax are all subtracted.

Self-employed parents can also deduct reasonable business expenses, though the court may scrutinize these if they seem inflated. A parent who claims $50,000 in business deductions on a $60,000 gross income will likely face questions about whether those deductions are legitimate.

Income caps and high-income cases

Florida's child support table has an income cap. When combined adjusted income exceeds a certain threshold (which varies by year but is typically around $10,000 to $11,000 per month), the table stops. For income above the cap, the court must decide how much additional support is appropriate.

In high-income cases, judges have discretion. They consider the child's standard of living during the marriage, the financial resources of both parents, and what the child actually needs. A child whose parents earn $20,000 per month combined may receive more support than the table suggests, but the court will not automatically award 100 percent of the excess income. The judge must explain their reasoning in writing.

When income is hard to determine

If a parent is self-employed, recently unemployed, or has irregular income, the court may average income over a period of time or use tax returns to establish a baseline. A parent who claims to earn nothing while working under the table will face skepticism — the court can impute income based on employment history, education, and earning capacity.

If a parent deliberately reduces income to lower support (for example, quitting a job or turning down a promotion), the court can impute income at the level the parent could reasonably earn. This is called income imputation, and it prevents parents from gaming the system by becoming artificially poor.

Modifications when circumstances change

Child support is not permanent at the amount set by the court. Either parent can request a modification if there is a substantial change in circumstances. Florida law allows a modification if income changes by 15 percent or more, or if there is a significant change in custody time.

A parent who loses a job, gets a substantial raise, or experiences a major change in parenting time should document the change and file a modification request with the court. The new amount does not take effect until the court approves it, so back payments may be owed if income increased. If income decreased, the parent should file promptly to avoid accumulating arrears.

Frequently Asked Questions

Does the child's mother automatically get support from the father?

No. Florida calculates support based on income and parenting time for both parents, regardless of gender. The parent with higher income and less parenting time typically pays, but a mother can owe support to a father if she earns more or has less custody time. The formula treats both parents the same way.

What counts as income for child support?

Wages, salary, self-employment income, rental income, investment income, retirement distributions, and unemployment benefits all count. Gifts and inheritances generally do not. If you receive money regularly from a source, the court will likely count it. Tax returns and recent pay stubs are the best proof of income.

Can I deduct my own rent or mortgage from child support?

No. Your housing costs do not reduce the income used in the formula. However, if you pay for the child's health insurance or daycare, those specific expenses do reduce your income. The court assumes you will pay your own living expenses from the income that remains after support.

What if the other parent refuses to disclose their income?

The court can order both parents to provide tax returns, pay stubs, and financial statements. If a parent refuses, the judge can hold them in contempt of court or impute income based on available evidence. Hiding income is not a legal way to lower support.

Does child support end when the child turns 18?

In Florida, support typically ends when the child turns 18 or graduates from high school, whichever is later. If the child is still in high school after turning 18, support continues until graduation or age 19, whichever comes first. Support also ends if the child marries, joins the military, or becomes self-supporting, though the paying parent must file a modification to stop payments officially.