Educational Resource

Child Support Calculator — Understand What to Expect

Estimate monthly child support payments for all 50 states. Enter income, custody arrangement, and expenses to get an educational estimate.

📚Educational Tool Only🔒No Data Stored⚖️Not Legal Advice🗺️All 50 States
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Child Support Payment Estimator

Enter your information to get an educational estimate. Covers all 50 states, income shares and percentage models.

Before taxes and deductions

Used in Income Shares states. Leave blank if unknown.

Work-related childcare (daycare, after-school)

Premium cost for children's portion only

Uninsured medical, special education, tutoring

🔒 No data is stored. Educational purposes only.

How Child Support Is Calculated

States use two primary models to determine support obligations.

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Income Shares Model

Used by ~40 states. Both parents' incomes are combined to determine the total support obligation, then each parent contributes their proportional share.

Learn How It Works →
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Percentage of Income

Used by ~14 states including Texas, Illinois, and Wisconsin. Support is a fixed percentage of the paying parent's income, regardless of the other parent's earnings.

See Your State's Model →
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Modifying Orders

Life changes. If your income drops, custody changes, or a child ages out, courts can modify child support orders. A 15% change typically qualifies.

Modification Guide →

50

States covered

2

Calculation models

$400+

Avg monthly support (1 child)

18

Years of typical obligation

Frequently Asked Questions

How is child support calculated?
Most states use either the Income Shares model (combining both parents' incomes) or the Percentage of Income model (based on the paying parent's income alone). Courts also add childcare, health insurance, and extraordinary expenses to the base amount.
How accurate is this calculator?
This is an educational estimate based on simplified state models. Actual court-ordered amounts vary based on many factors including exact state guidelines, deductions, credits, and judicial discretion. Use this as a starting point, not a final answer.
Does shared custody reduce child support?
Yes. When parenting time is split more evenly (roughly 40-60%), most states reduce the support obligation by 20-30% to account for the extra costs the paying parent incurs during their parenting time.
What expenses are added on top of base support?
Courts typically add work-related childcare costs, health insurance premiums for the children, and extraordinary expenses like uninsured medical bills or special education costs. These are usually split proportionally between parents.
Can child support be modified?
Yes. Either parent can petition for a modification if there has been a substantial change in circumstances — typically a 15% or more change in income, a custody change, or a significant change in the child's needs.

⚠️ Important Disclaimer: This calculator provides educational estimates only. Child support is determined by courts and varies significantly by state, judge, and individual circumstances. This tool does not constitute legal advice. Consult a licensed family law attorney for guidance specific to your situation.