Calculation is client-side, income figures are never transmitted or stored.
How Indiana Child Support Is Calculated
- Determine each parent's weekly gross income (wages, self-employment, and other sources), then compute weekly adjusted income after allowed deductions.
- Combine both parents' weekly adjusted incomes to get combined weekly adjusted income.
- Look up the basic child support obligation from the official Guideline Schedules for Weekly Support Payments for that combined income and number of children (up to 8; above 8, courts use discretion).
- Each parent's share equals their income divided by the combined income, applied to the basic obligation.
- Above $9,200/week combined income, a fixed percentage of the excess (8.1% for 1 child up to 20.4% for 8 children) is added to the top-bracket amount.
Indiana Child Support Worksheet Walkthrough
Example: combined weekly adjusted income $700/week, 2 children, Parent A earns $400/wk (57% share), Parent B earns $300/wk (43% share) and has primary custody.
- Basic weekly obligation for $700 combined, 2 children: $184/week.
- Parent A's share: 57% × $184 ≈ $105/week guideline child support paid by Parent A.
How This Calculator Works — Formula & Constants
Source: Indiana Child Support Rules and Guidelines (Indiana Supreme Court) · Calcul déterministe — no AI, no arbitrary estimate.
Constants used
| Constant | Value | Source |
|---|
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
Deterministic calculation based on Indiana's official guideline schedule table. Verify against Indiana's official calculator for a court-ready figure.
FAQ
How is child support calculated in Indiana?
Determine each parent's weekly gross income (wages, self-employment, and other sources), then compute weekly adjusted income after allowed deductions. Combine both parents' weekly adjusted incomes to get combined weekly adjusted income. Look up the basic child support obligation from the official Guideline Schedules for Weekly Support Payments for that combined income and number of children (up to 8; above 8, courts use discretion). Each parent's share equals their income divided by the combined income, applied to the basic obligation. Above $9,200/week combined income, a fixed percentage of the excess (8.1% for 1 child up to 20.4% for 8 children) is added to the top-bracket amount.
Is Indiana child support based on weekly or monthly income?
See the guidelines section above.
What happens if combined income is above $9,200/week?
See the guidelines section above.
Does Indiana have a parenting time credit?
See the guidelines section above.
Methodology & Source
Formula model: income shares. Effective 2024-01-01, guideline version 2024-IN-v1, last reviewed 2026-07-11.
Official source: Indiana Child Support Rules and Guidelines (Indiana Supreme Court) (Ind. Child Support Guideline 3).
Above $9,200/week combined income, a fixed percentage of the excess is added to the table's top-bracket amount (this calculator applies it automatically). Indiana's Parenting Time Credit Table (starting at 52 overnights/year) is not modeled in this calculator — consult Indiana's official Child Support Calculator for a parenting-time-adjusted figure. This calculator shows the presumptive guideline amount only, not a court order.
Guideline figures transcribed from the primary source above and cross-checked against Indiana's official calculator/worksheet for multiple test scenarios — see our verification methodology.