Child Support Calculator
Not your state’s guideline and not a court worksheet. Click any i for detail.
Incomes and parenting time
Obligor monthly net ($)
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Obligor
Parent who would pay, after taxes (sketch). |
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Other parent monthly net ($)
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Other parent
Payee’s monthly net. Used for combined income share. |
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Children
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Count
Number of children in this case. |
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Overnights / year with obligor
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Overnights
If ≥ 92, a simple parenting-time haircut applies. |
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Other support already ($/mo)
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Credit
Subtracted at the end if they already pay something on this case. |
How to use this calculator
- Enter both parents’ monthly net.
- Set the number of children.
- Enter overnights with the paying parent if you want a time adjustment.
- Ignore this page if your state publishes a lookup table — use that.
Results explained
Combined net × a kids percentage (17% / 25% / 29% / 31% / 33%) gives a “basic” support number. The obligor owes their share of combined income times that basic. High overnight counts trim the result. States use worksheets, caps, add-ons for health insurance and childcare, and statutory tables this page does not implement.
Quick reference: this sketch vs real guidelines
Income shares is a common *family* of models, not one number.
| Item | Detail |
|---|---|
| 1 child rate (this page) | 17% of combined net |
| 2 children | 25% |
| 3 / 4 / 5+ | 29% / 31% / 33% |
| Parenting time haircut | Overnights ≥ 92 / year |
| Your state | Use that state’s worksheet |
Health insurance, childcare, extraordinary medical, and existing orders are usually add-ons or credits — not fully modeled.
How the estimate is built
basic = combined × rate(kids); obligation = basic × (obligor/combined), then optional overnight factor, minus other support.
Example scenario
$4,500 + $2,800 combined, 1 child, 80 overnights → 17% × $7,300 × 4,500/7,300 ≈ $765/mo in this sketch.
FAQ
Is this my state?
No. Many states publish official calculators or Excel worksheets. Use those for filing.
Gross vs net?
This sketch uses net. Some states start from gross and apply their own deductions.
Alimony interaction?
See the alimony calculators; stacking support is state-specific.