How Child Support Is Calculated
U.S. states use one of three calculation models to determine child support obligations. Learn how each works and which one your state uses.
Understanding Calculation Models
Used by 41 States
Both parents' incomes are combined to determine what would have been spent on the child if the family were intact. Each parent pays their proportional share based on their percentage of the combined income.
Used by 6 States
Only the non-custodial parent's income is considered. A flat percentage is applied based on the number of children. States using this: TX, WI, ND, MS, AK, NV.
Used by 3 States
A variation of income shares that first ensures each parent can meet their own basic needs (self-support reserve), then allocates remaining income to child support. States: DE, HI, MT.
Estimates only — not legal advice. Many factors can affect actual support orders. Consult a family law attorney.