Child Support Calculator
Estimated Monthly Support
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Annual Support
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Combined Income
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Income Share %
How Child Support Is Calculated
Child support calculations vary significantly by state, but most use either the Income Shares Model (used by ~40 states) or the Percentage of Income Model. This calculator uses a simplified Income Shares approach: both parents' incomes are combined, a basic support amount is calculated based on the number of children, and each parent's share is proportional to their income.
Common factors include the number of children, each parent's income, custody arrangement, health insurance costs, childcare expenses, and extraordinary medical or educational costs. Many states provide overnight credits that reduce the obligation when the non-custodial parent has the children for a significant number of overnights.
This calculator provides a rough estimate only. Every state has its own specific guidelines, worksheets, and deviation factors. Actual child support orders are set by family courts and can differ significantly from general estimates. Always consult a family law attorney in your state for accurate calculations.
Frequently Asked Questions
How long does child support last?
In most states, child support continues until the child turns 18 or graduates high school (whichever is later). Some states extend support through college. Special needs children may receive support indefinitely.
Can child support be modified?
Yes, either parent can request a modification if there is a significant change in circumstances such as job loss, substantial income change, or change in custody arrangement. Courts review and approve modifications.
What happens if child support is not paid?
Consequences include wage garnishment, tax refund interception, license suspension, credit reporting, liens on property, contempt of court charges, and in extreme cases, jail time.
Does child support cover college expenses?
This varies by state. Some states can order parents to contribute to college costs, while others end support obligations at age 18 or high school graduation. Check your state laws and any existing court orders.