Florida’s 2023 shift to a presumption of equal time-sharing spawned a persistent myth on its heels: that 50/50 custody means no child support. It does not — and parents who negotiate schedules believing otherwise get surprised at the worksheet. Here is how Florida actually calculates support when the children split time equally, why the higher earner still usually pays, and what the real levers are. From The Law Office of John Vernon Moore, P.A. in Melbourne.
The Substantial Time-Sharing Formula
When each parent has the children at least 20% of overnights (73 per year), § 61.30 switches to the gross-up method: the basic obligation is multiplied by 1.5 (recognizing that two households duplicate costs — two bedrooms, two sets of clothes, two pantries), each parent’s share is computed by income percentage, then each parent’s share is adjusted by the other parent’s overnight percentage, and the difference nets out to a transfer payment. At exactly 50/50, the mathematics simplify to something intuitive: the transfer approximates the income-share difference applied to the grossed-up obligation — meaning equal incomes at equal time produce near-zero support, while unequal incomes produce a payment from the higher earner scaled to the gap.
Why the Higher Earner Still Pays at 50/50
The policy is deliberate: children should experience reasonably comparable resources in both homes. Without equalization, a child would live one week in the household of a $150,000 earner and the next in the household of a $40,000 earner — same child, whiplash standard of living. The transfer payment narrows that gap. What this means practically: negotiating hard for equal overnights as a support-avoidance strategy mostly fails (and judges recognize the motive — a poor look under the best-interests factors), while negotiating for equal time as a parenting matter succeeds on its merits with the support consequences following honestly from the worksheet.
The Inputs That Move the Number
At 50/50, three variables dominate the calculation. Net incomes — every income fight described across our support library applies: imputation, self-employment analysis, variable pay. Overnight counts — the formula uses actual scheduled overnights, so 50/50 versus 60/40 shifts real dollars, and holiday and summer blocks count; audit the schedule your parenting plan actually produces before assuming it is equal. Add-ons — insurance premiums and childcare flow through the same allocation and often exceed the base transfer in equal-time cases. One caution that saves litigation: a parent who negotiates equal overnights and then routinely fails to exercise them invites both a support modification and a schedule one — the worksheet follows reality when reality diverges from paper.
Common 50/50 Scenarios
Equal incomes, equal time: support at or near zero, with add-ons split — the clean case. The teacher and the engineer: at typical Space Coast income gaps, expect a meaningful monthly transfer despite equal parenting — this is the scenario the myth misleads most. One parent remarries money: a new spouse’s income is not counted; the guidelines see only the parents. Incomes converge after the order: the recipient’s raise or the payor’s decline is a modification event on the 15%/$50 standard — the order does not self-adjust, in either direction.
Frequently Asked Questions
We agreed on 50/50 and no support. Will the court accept that?
Courts review support waivers skeptically because support belongs to the child — small deviations with findings pass; wholesale waivers against a large income gap generally do not. Run the worksheet first; agree within its gravity.
Do holiday and vacation overnights count in the 73-night math?
Yes — the count is annual overnights under the whole schedule, holidays included. Plans on the 50/50 boundary should be counted precisely.
My ex earns double what I do but pays nothing because we split time. Is that right?
Probably not under the formula — bring your order and the incomes to a consultation; miscalculated equal-time cases are among the most common errors we correct.
If I get more overnights, does my support drop automatically?
No — the order controls until modified. A schedule change that moves the worksheet meaningfully supports a modification petition; file it rather than self-adjusting.
Equal Time, Honest Numbers
With over 89 years of combined experience, our team runs these calculations daily — and fixes the ones run wrong. Call (321) 529-7777 or contact us online for a free 30-minute consultation.