Florida's SB 1128 took effect July 1, 2026, revising how child support is calculated so that additional overnights for the non-custodial parent can reduce the support obligation, and rewriting how support attaches for children born out of wedlock. Higher-income parents may see payments restructured around the child's actual needs. Florida courts began applying the changes in early July 2026.
Key Facts
| Item | Detail |
|---|---|
| What happened | Florida enacted SB 1128, revising child support calculation and paternity support rules |
| When | Effective July 1, 2026; courts applying it in early July 2026 |
| Where | Florida (statewide) |
| Who's affected | Parents paying or receiving child support, and unmarried parents establishing paternity |
| Key statute | Fla. Stat. § 61.30 (child support guidelines); Fla. Stat. § 61.13 (support and time-sharing) |
| Impact | More shared overnights can lower support; support for children born out of wedlock is restructured around the child's needs |
The change was reported by Global Law Experts as part of Florida's ongoing effort to tie support obligations more closely to actual parenting time and the child's real financial needs.
Why this matters legally
SB 1128 strengthens the connection between parenting time and the dollar amount of child support in Florida. Under Florida's existing guidelines in Fla. Stat. § 61.30, a gross-up (substantial time-sharing) calculation already applies once a parent exercises at least 20 percent of overnights — roughly 73 of 365 nights per year. SB 1128 reinforces this framework, so a non-custodial parent who secures more overnights can see a meaningful reduction in the monthly obligation.
This is a definitive shift in emphasis, not a cosmetic edit. Florida courts will now scrutinize the actual overnight schedule more carefully when setting support, and parents have a clearer financial incentive to negotiate realistic, workable parenting plans. The caveat: the reduction is not automatic or unlimited. A court still applies the statutory formula, and it can deviate when the guideline amount would leave the child without adequate support.
The paternity provisions matter just as much. For children born out of wedlock, SB 1128 clarifies how and when the support obligation attaches once paternity is established, aligning those cases more closely with the framework that governs children of married parents. That means unmarried parents establishing child support obligations face a more predictable, needs-based calculation.
How Florida law handles this
Florida calculates child support using an income-shares model codified in Fla. Stat. § 61.30. Both parents' net incomes are combined, a basic support obligation is drawn from the statutory guideline schedule, and each parent's share is prorated by income. When a parent exercises at least 20 percent of the annual overnights (73 nights), the gross-up formula in § 61.30(11)(b) adjusts the obligation upward to reflect the shared costs of two households, then allocates it by both income and time-sharing percentage.
SB 1128 operates within this structure while giving overnights greater practical weight. The more overnights a paying parent exercises above the 20 percent threshold, the more the time-sharing multiplier can shift the net obligation. Parents can estimate the effect of different schedules using a parenting-time calculator alongside a Florida child support calculator.
Time-sharing itself is governed by Fla. Stat. § 61.13, which directs courts to decide parenting arrangements based on the best interests of the child across roughly 20 statutory factors. Since 2023, Florida law has included a rebuttable presumption that equal (50/50) time-sharing serves the child's best interests. SB 1128's support revisions dovetail with that presumption: as equal or near-equal schedules become more common, the support math increasingly reflects that both parents are directly covering the child's day-to-day costs. For unmarried parents, paternity must first be established under Fla. Stat. § 742.10 before a court can order support or set a time-sharing schedule.
Practical takeaways
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Count your overnights precisely. Because the 20 percent threshold (73 overnights per year) triggers the substantial time-sharing calculation, an accurate overnight count directly affects the support number. Track the schedule with a parenting-time calculator.
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Do not assume more time automatically erases support. The reduction follows the statutory formula in Fla. Stat. § 61.30; a court can still deviate up or down by up to 5 percent (and further with written findings) to meet the child's needs.
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Unmarried parents should establish paternity first. Support and child custody orders flow from a legal finding of paternity under Fla. Stat. § 742.10. Establishing it early creates a clear support baseline under the new rules.
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Revisit existing orders carefully. A change in the law is not, by itself, an automatic basis to modify. Florida generally requires a substantial, permanent, and involuntary change in circumstances — often a 15 percent or at least $50 swing in the guideline amount — before a court will modify support.
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Document the child's actual needs. Because SB 1128 emphasizes needs-based support for higher-income cases and paternity matters, keep records of childcare, health insurance, and extraordinary expenses that feed the § 61.30 calculation.
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Build a plan before you file. Map out your parenting schedule, income figures, and target support range using a personalized divorce roadmap so negotiations start from realistic numbers.
If you are navigating a Florida child support or paternity matter under the new law, a local family law attorney can run the guideline calculation on your specific numbers and advise whether a modification is worth pursuing. You can find a Florida divorce attorney to review your parenting schedule and support obligation.
This article discusses recent news and provides general legal commentary. It does not constitute legal advice. Every case is unique. Consult a qualified family law attorney for advice specific to your situation.