The 73-Overnight Line: Why One Night a Year Can Change Florida Child Support by Hundreds of Dollars

Florida child support has a cliff in it. Below 73 overnights a year for the parent with less time, the court uses the standard method in section 61.30. At 73 overnights and above, the court must use the gross-up method in section 61.30(11)(b). The two methods can produce very different numbers from the same incomes, which is why a fight over a Wednesday night is often a fight about money.

Where 73 comes from

The statute says "substantial amount of time" means at least 20 percent of the overnights in a year. Twenty percent of 365 is 73. The Form 12.902(e) worksheet says it plainly at line 10: if each parent exercises time-sharing at least 20 percent of the overnights in the year, complete lines 10 through 21.

It is a threshold, not a slope. At 72 overnights the standard method applies in full. At 73 the gross-up method applies in full. Nothing in between.

What the standard method does

Lines 1 through 9. Both parents' net monthly incomes are combined and matched to the guidelines schedule for the number of children. That basic obligation is split by each parent's share of the combined income. Child care and the children's health insurance are added and split the same way, less what each parent already pays. The parent with fewer overnights pays their line 9 figure to the other parent. The overnights themselves do not enter the arithmetic at all.

What the gross-up method does

Lines 10 through 21. The basic obligation is multiplied by 1.5, on the theory that two households maintaining a child cost more than one. That larger figure is split by income share. Then each parent's share is multiplied by the other parent's percentage of overnights. The two results are compared, and the parent with the larger figure pays the difference, adjusted for child care and health costs.

Because each parent's obligation is scaled by the other parent's time, the transfer shrinks as the schedule moves toward equal. At 50/50 with equal incomes the transfer is close to zero. At 50/50 with unequal incomes the higher earner still pays, but far less than under the standard method.

A worked comparison

Take two parents with net incomes of $4,800 and $4,100 a month and two children. Combined net income is $8,900, and the schedule row gives a basic obligation of $2,111. The higher earner's share is 53.9 percent.

Under the standard method, if the higher earner has the children fewer than 73 nights, they pay their share of the basic obligation, about $1,138 a month before insurance credits.

Under the gross-up method with the higher earner at 128 overnights and the other parent at 237, the same incomes produce a transfer of about $388 a month. The difference is not a rounding error. It is the schedule.

Our child support calculator runs both methods from the overnight counts you enter and shows which one controls, so you can see the cliff for your own numbers.

Why the court counts overnights, not hours

The statute counts overnights, and the worksheet counts overnights. A parent who has the children every day after school until bedtime, but never overnight, has zero for this purpose. That is a common surprise in modification cases where the informal schedule has drifted from the written plan.

The court applies the parenting plan it orders, not the schedule the parties happen to be following. If the plan says 73 and reality says 40, the support order runs on 73 until someone moves to modify. Section 61.30(11)(c) allows a recalculation when a parent fails to exercise the time-sharing in the plan.

Negotiating around the line

Because the threshold is binary, parenting plans get negotiated at the margin. A schedule that gives one parent 70 overnights and a schedule that gives them 75 look nearly identical on a calendar and look very different on the worksheet. Mediators see this constantly.

Two cautions. First, the court can deviate from the guideline figure by up to 5 percent on the statutory factors, and section 61.30(11)(a)(10) specifically lists a time-sharing arrangement that falls short of 20 percent but still reduces the other parent's expenses. So a parent at 60 overnights is not without an argument. Second, a parenting plan built to hit a number rather than to fit the children is the kind of plan that gets modified.

The takeaway

Know your overnight count before you know your support number. Count from the parenting plan the court will apply, count overnights rather than days, and run the worksheet both ways when the count is anywhere near 73.

Steven C. Fraser, Esq., Florida Bar No. 625825, Florida Supreme Court Certified Family Mediator No. 37256 CFR. Jacksonville, Florida. 877-862-7188.