Child Support Calculator
By State
Each state uses a different formula. Find yours — get an accurate estimate in under 60 seconds, free.
own formula
Select your state
Find your state below — the formula model, percentages and income caps are all pre-filled.
Enter your income
Net or gross depending on your state. The calculator tells you which one it needs.
Get your estimate
See the monthly payment, annual total, and a full breakdown of how the number was calculated.
Explore every scenario
Each state page includes 50/50 custody, arrears with interest, modification eligibility and a full payment calendar.
calculation systems
Percentage of Income
Only the paying parent’s income matters. A fixed percentage (e.g. 20% for 1 child) is applied to net or gross income. Simple and predictable.
Income Shares Model
Both parents’ incomes are combined to determine the total obligation, then each parent pays their proportional share. Used by most states.
Melson Formula
The most complex model — ensures both parents retain enough for basic living needs before any child support is calculated.
Click any state to open its calculator. Each page includes 6 tools: basic calculator, 50/50 custody, arrears, modification, state laws and payment calendar.
for each state
Official State Formulas
Every calculator uses the formula mandated by that state’s statute. Percentage rates, income caps and age cutoffs are sourced from state law — not generic estimates.
Full Breakdown Shown
You see every line of the calculation — which income figure was used, what rate was applied, what add-ons were included, and how the final number was reached.
6 Tools in Every Page
Basic calculator, 50/50 custody adjustment, arrears with interest, modification eligibility check, state laws summary and a 12-month payment calendar.
Completely Free
No account needed, no email required, no paywall. Run as many calculations as you need for as many scenarios as you want.
Updated for 2026
Income caps, interest rates and guideline amounts are reviewed annually. The 2026 figures reflect the latest updates from each state’s child support guidelines.
Honest About Limits
These are estimates — not legal advice. Every page is clear about when a family law attorney is needed. We flag complex situations rather than over-simplify them.
At $5,000/month net income, 1 child — solo custody.
| State | Model | Est. Monthly (1 child) | Income Cap | Support Ends | Arrears Interest |
|---|---|---|---|---|---|
| 🤠 TexasOur page | % of Income | $1,000 | $9,200/mo | Age 18 | 6% |
| 🌴 Florida | Income Shares | ~$850–$1,100 | None | Age 18 | 6% |
| 🌴 California | Income Shares | ~$900–$1,200 | None | Age 18 | 10% |
| 🗽 New York | % of Income | $850 (17%) | $163k/yr | Age 21 | 9% |
| 🍑 Georgia | Income Shares | ~$800–$1,050 | None | Age 18 | 7% |
| 🌲 Washington | Income Shares | ~$900–$1,150 | None | Age 18 | 12% |
| 🌿 Mississippi | % of Income | $700 (14%) | None | Age 21 | 8% |
| 🔵 Delaware | Melson | Complex — see calculator | None | Age 18 | 9.5% |
* Income Shares amounts depend on both parents’ incomes — ranges shown assume second parent earns $3,000–$5,000/month. Use state calculators for exact figures.
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Free, no login required, updated for 2026. Get your estimate in under a minute.
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