Child Support Calculator by State (2026)
Select your state to calculate your estimated child support. Each calculator uses the official state guidelines and gives an instant free estimate.
How Child Support Is Calculated in the United States
States use one of three models: the Income Shares model (most states, based on both parents' combined incomes), the Percentage of Income model (Texas, Mississippi, Wisconsin, and others; based on the non-custodial parent's income), or the Melson Formula (Delaware, Hawaii, Montana). All models consider number of children and may adjust for health insurance, child care, and custody time.
Understanding Child Support in the US
Child support is a court-ordered payment made by a non-custodial parent to help cover the costs of raising their children. Every state has its own guidelines.
The Three Models
Income Shares: Estimates total child-rearing costs based on both parents' combined incomes, then divides proportionally. Used by 41 states.
Percentage of Income: Applies a fixed percentage to the non-custodial parent's income. The percentage increases with more children. Used by Texas, Mississippi, Wisconsin, Alaska, and North Dakota.
Melson Formula: A variation of Income Shares that first ensures each parent retains enough for basic needs. Used by Delaware, Hawaii, and Montana.