Advanced Child Support Calculator

Country/Region

United States model based on income shares approach

Custom Model Year

Parent 1 Monthly Income ($)

Parent 2 Monthly Income ($)

Number of Children

Primary Custody Arrangement

Primary (One Parent)

Joint

Extra Expenses (Education, Healthcare, etc.) ($)

Overnights with Non-Custodial Parent (per year)

Child Support Calculation

$1,250

Model Used: United States (2024)

Combined Monthly Income: $8,000

Non-Custodial Parent Share:

Basic Support Amount: $1,050

Extra Expenses Added: $200

Overnight Adjustment: -$0

Child Support Breakdown

How Child Support is Calculated Worldwide

1. Income Shares Model

Used in the United States, Canada, and many other countries. This model estimates the amount that would have been spent on the child if the parents lived together, then divides this amount proportionally based on each parent’s income. The non-custodial parent pays their share to the custodial parent.

2. Percentage of Income Model

Common in parts of Europe and Australia. A fixed percentage of the non-custodial parent’s income is paid as child support. The percentage typically increases with the number of children but may have income caps or floors.

3. Melson Formula

Used in some U.S. states like Delaware and Hawaii. This complex formula considers each parent’s basic needs allowance, the child’s primary support needs, and additional support for a child’s standard of living.

4. Shared Parenting Adjustments

Most systems reduce child support when the non-custodial parent has substantial parenting time (often 30% or more overnights). This reflects the direct costs incurred during their time with the child.

5. Special Expenses

Additional costs like health insurance, medical expenses, childcare, and educational costs are typically added to the basic support amount and divided proportionally between parents.