When you’re facing a divorce or paternity case in Florida, one of the first concerns most parents deal with is some version of “how much will child support be?” Florida does not leave this number to guesswork or a judge’s personal opinion, with state law laying out a specific formula, found in Florida Statute 61.30, that calculates a presumptive amount based on both parents’ income and a handful of other factors.
Understanding how the formula works isn’t necessarily enough to get your exact number without your own figures, but it will help you understand what documentation matters, why the number can move up or down, and what to expect once you sit down with an attorney or mediator to run the calculation.
Florida’s Income Shares Model, Explained
Florida uses what’s known as an “income shares” model. The idea behind it is that a child should receive the same proportion of parental income they would have received if the family had stayed together. Instead of picking an arbitrary number, the law starts by figuring out how much both parents combined would reasonably spend supporting a child at their income level, then divides that responsibility between the parents in proportion to what each of them earns.
That means the calculation always happens in three basic stages: figuring out income, finding the total support obligation, and splitting that obligation between the two parents.
Step One: Calculating Each Parent’s Net Income
Florida’s formula runs on net income, not gross income. Gross income is broad and includes salary and wages, bonuses, commissions, and overtime; self-employment or business income; disability, workers’ compensation, and unemployment benefits; retirement and Social Security payments; alimony from a different relationship; and investment income such as interest, dividends, or rental income. If a parent is voluntarily unemployed or underemployed, a court can also impute income based on that parent’s work history, education, and job market.
From gross income, certain deductions are subtracted to arrive at net income: income taxes, FICA or self-employment tax, mandatory union dues, mandatory retirement contributions, health insurance premiums the parent pays for themselves, and any court-ordered alimony or child support the parent is already paying for a different case. What’s left is the number that goes into the formula.
Step Two: Finding the Combined Support Obligation
Once both parents’ net incomes are calculated, they’re added together to get a combined net income figure. That number is matched against Florida’s statutory Child Support Guidelines Schedule, a table that sets a minimum support obligation based on combined income and the number of children involved. The schedule accounts for the fact that support needs increase in a nonlinear fashion, such as a second child not costing exactly as much as the first, so the table is built around actual average spending patterns instead of simple multiplication.
Step Three: Splitting the Obligation by Income Share
With the total obligation set, the final step is dividing it fairly. Each parent’s percentage share of the combined net income becomes their percentage share of the total support obligation. A parent earning 60% of the couple’s combined net income is generally then responsible for 60% of the support figure from the schedule. In most cases, this results in one parent paying support to the other, since a child usually lives with one parent more than the other.
Does It Matter How Many Overnights Each Parent Has?
Yes, and this is where the calculation usually gets more complicated. If a parent has at least 20% of the overnights with the child over the course of a year, generally 73 nights or more, Florida applies what’s called the Gross-Up Method. This approach recognizes that a parent with substantial time is also directly covering food, activities, and everyday costs during that time, so it adjusts the final support number to reflect both parents’ direct spending rather than assuming only one household bears the day-to-day cost. Depending on the numbers involved, this adjustment can significantly change what the paying parent owes.
What Costs Get Added on Top of the Base Number?
The schedule amount is just a starting point. Florida law requires three specific costs to be added into the calculation and then divided proportionally between the parents based on their income share: the cost of the child’s health insurance premium, work-related childcare expenses, and any recurring, noncovered medical, dental, or prescription costs. These add-ons are common, and overlooking them is one of the more frequent mistakes in a do-it-yourself calculation.
Can a Judge Order a Different Amount Than the Guidelines?
The guideline amount is presumed correct, but that doesn’t make it absolute. A judge can adjust the number up or down by as much as 5% without giving a specific reason. Anything beyond that requires a written explanation tied to specific circumstances, such as a child’s extraordinary medical or educational needs, seasonal changes in a parent’s income, or an unusual time-sharing arrangement. Courts don’t deviate often, but the option exists when the standard formula doesn’t fit a family’s situation.
Frequently Asked Questions
Is Florida child support based on gross income or net income?
Net income. Florida starts with gross income from all sources, then subtracts taxes, mandatory retirement contributions, health insurance premiums, and other court-ordered support to arrive at the net figure used in the formula.
What if one parent doesn’t have a steady paycheck?
Self-employment and business income are still counted, calculated as gross receipts minus ordinary and necessary business expenses. If a parent appears to be working below their actual earning capacity on purpose, a court can impute income based on their education, experience, and local job opportunities.
Does 50/50 time-sharing mean neither parent pays support?
Not necessarily. Even with equal time-sharing, if the parents have significantly different incomes, the parent earning more can still owe support to the other parent under the Gross-Up Method.
Can parents agree to a different amount than the guidelines calculate?
Parents can propose a different figure, but a judge still has to review it and confirm it’s in the child’s best interest before approving it. This is often easier to work through in mediation than in litigation.
How often can child support be recalculated in Florida?
Either parent can ask for a review when there’s a substantial change in circumstances, such as a significant income change, a new support order for another child, or a change in the time-sharing schedule.
Next Step
Working out a child support number is rarely just about running a formula. You need to make sure the number reflects your true financial picture and your child’s needs. If you’re navigating a Florida child support case, or you’d like to resolve it outside of a courtroom through mediation, Catherine Eaton can walk you through your options.