Free Child Support Calculator

Estimate your monthly child support obligations instantly based on your state's specific legal guidelines.

How Child Support is Calculated

Many parents don't realize that there is no universal federal formula for child support. Every state uses its own unique model. While the math varies, most states calculate support based on one of three legal frameworks:

Income Shares Model: Considers both parents' combined incomes to determine support (used by 41 states).
Percentage of Income Model: Based solely on a flat percentage of the non-custodial parent's income (used by 6 states).
Melson Formula: A more complex variation ensuring parents' basic needs are met first before calculating child support (used by 3 states).

Our calculator takes the guesswork out of this by automatically applying the correct model for your state.

What factors influence the calculation?

While your state's mathematical model provides the baseline, your personal estimate will fluctuate based on a few key factors:

Gross Income: Wages, salaries, and other earnings of one or both parents.
Parenting Time: How the annual overnights are split between you and your coparent.
Deductions & Expenses: Costs like health insurance premiums, daycare, and mandatory union dues.

⚠️ Important: This tool provides an estimate for informational and planning purposes only. The exact, legally binding child support amount can only be determined and ordered by a family court judge or your state's official child support enforcement agency. Judges often have the discretion to deviate from standard guidelines based on the unique financial circumstances of your family.

Free Child Support Calculator

Estimate your monthly child support obligations instantly based on your state's specific legal guidelines.

How Child Support is Calculated

What factors influence the calculation?

Estimate your child support

Understand & Calculate Support by State