Calculation is client-side, income figures are never transmitted or stored.
How Florida Child Support Is Calculated
- Determine each parent's net monthly income (gross income minus taxes, mandatory retirement, and other allowable deductions).
- Combine both parents' net incomes to get combined monthly net income.
- Look up the minimum child support obligation from the official schedule for that combined income and number of children (Fla. Stat. § 61.30(6)).
- Above $10,000 combined net income, add a fixed percentage of the excess (5.0% for 1 child up to 12.5% for 6 children) to the $10,000-bracket amount.
- Each parent's percentage share equals their net income divided by combined net income.
- Child care costs and health insurance/uncovered medical costs are added to the basic obligation before proration.
- If the paying parent has more than 73 overnights/year (20%+ timesharing), a different 'gross-up' worksheet applies instead of straight proration.
Florida Child Support Worksheet Walkthrough
Example: combined net income $3,000/month, 2 children, Parent A earns $1,800/mo (60% share), Parent B earns $1,200/mo (40% share) and has primary custody (under 73 overnights/year for Parent A).
- Minimum child support obligation for $3,000 combined, 2 children: $1,001/month.
- Parent A's share: 60% × $1,001 = $601/month guideline child support paid by Parent A.
How This Calculator Works — Formula & Constants
Source: Florida Statutes (Florida Senate) · Calcul déterministe — no AI, no arbitrary estimate.
Constants used
| Constant | Value | Source |
|---|---|---|
| Overnights threshold | 73 nights/yr | Fla. Stat. § 61.30 |
Formula
base_obligation = schedule_lookup(combined_income, children)
share_B = parentB_income / combined_income
total_obligation = base_obligation + childcare_cost + health_insurance_cost
obligation_B = total_obligation × share_B
obligation_B = obligation_B × (1 - custody_credit(overnights))
Deterministic calculation based on Florida's official guideline schedule table. Verify against Florida's official calculator for a court-ready figure.
FAQ
How is child support calculated in Florida?
Determine each parent's net monthly income (gross income minus taxes, mandatory retirement, and other allowable deductions). Combine both parents' net incomes to get combined monthly net income. Look up the minimum child support obligation from the official schedule for that combined income and number of children (Fla. Stat. § 61.30(6)). Above $10,000 combined net income, add a fixed percentage of the excess (5.0% for 1 child up to 12.5% for 6 children) to the $10,000-bracket amount. Each parent's percentage share equals their net income divided by combined net income. Child care costs and health insurance/uncovered medical costs are added to the basic obligation before proration. If the paying parent has more than 73 overnights/year (20%+ timesharing), a different 'gross-up' worksheet applies instead of straight proration.
Does Florida child support change with 50/50 or substantial timesharing?
Yes — timesharing changes the calculation method entirely rather than adjusting a percentage. If the paying parent has more than 73 overnights per year (roughly 20%+ timesharing), Florida requires a different 'gross-up' worksheet instead of the standard proration used for primary-custody arrangements, which generally produces a lower support amount.
Is Florida child support based on gross or net income?
Net monthly income — gross income minus taxes, mandatory union dues, mandatory retirement, and other allowable deductions under Fla. Stat. § 61.30. Both parents' net incomes are combined to look up the obligation on the official schedule.
What happens if combined income is above $10,000/month?
Above $10,000/month in combined net income, Florida automatically adds a fixed percentage of the excess on top of the $10,000-bracket schedule amount — ranging from 5.0% for one child up to 12.5% for six children. This is a formula step built into the statute, not a discretionary court decision.
Methodology & Source
Formula model: income shares. Effective 2023-07-01, guideline version 2025-FL-v1, last reviewed 2026-07-11.
Official source: Florida Statutes (Florida Senate) (Fla. Stat. § 61.30).
Courts may deviate from the guideline amount for documented reasons (extraordinary medical or educational expenses, seasonal income variation, etc.) — this calculator shows the presumptive guideline amount only, not a court order.
Guideline figures transcribed from the primary source above and cross-checked against Florida's official calculator/worksheet for multiple test scenarios — see our verification methodology.