Child Support Calculator: Planning Estimate

The calculator is a planning heuristic, not any state's guideline: 17% of the two parents' combined gross income for one child, 5 percentage points more for each further child up to five, plus the yearly child care and children's health insurance you enter, split between the parents by income share. The parent with fewer overnights is treated as the payer of their share. It does not compute net income, state schedules, self-support reserves, parenting-time formulas, credits for other children, who actually pays a cost, or deviations, so its result is a starting point for planning, not an order.

Source: Each state's child support guideline, statute or official calculator (state table); model classification cross-checked against NCSL · checked 2026-08-07

Each row gives the guideline model the state uses and its official guideline, statute or calculator, from this site's child support source file (model classifications cross-checked against NCSL, 2026-08-07). The model never changes the calculator's math.

Income shares: Both parents' incomes are combined, a state schedule gives the share of that income the children would have received had the parents lived together, and each parent owes their income share of it. Percentage of income (Alaska, Mississippi, Nevada, North Dakota, Texas and Wisconsin): A percentage of the paying parent's income, set by the number of children; the other parent's income does not enter the base amount. Melson (Delaware, Hawaii and Montana): Each parent first keeps a self-support amount, the children's primary needs are funded from what is left, and a further share of remaining income is added for the children's standard of living. Each state defines the income it counts: California, Florida, Illinois, Michigan, Pennsylvania and Texas, for example, start from net income, not the gross income this calculator uses. Read the linked source for the details.

• Alabama: Alabama Judicial System, Rule 32
• Alaska: Alaska Court System, Civil Rule 90.3
• Arizona: Arizona Judicial Branch, Child Support Guidelines
• Arkansas: Arkansas Office of Child Support Enforcement
• California: California Family Code §4055
• Colorado: Colorado Child Support Services
• Connecticut: Connecticut Judicial Branch, Child Support
• Delaware: Delaware Courts, Child Support Calculator
• Florida: Florida Statutes §61.30
• Georgia: Georgia Child Support Commission Calculator
• Hawaii: Hawaii Child Support Enforcement Agency
• Idaho: Idaho Department of Health and Welfare, Child Support
• Illinois: Illinois Marriage and Dissolution of Marriage Act §505
• Indiana: Indiana Rules of Court, Child Support Rules and Guidelines
• Iowa: Iowa Health and Human Services, Child Support
• Kansas: Kansas Judicial Branch, Child Support Guidelines
• Kentucky: Kentucky Court of Justice, Child Support
• Louisiana: Louisiana Revised Statutes §9:315.19
• Maine: Maine DHHS, Child Support Services
• Maryland: Maryland Department of Human Services, Child Support
• Massachusetts: Massachusetts Trial Court, Child Support Guidelines
• Michigan: Michigan Compiled Laws §552.519
• Minnesota: Minnesota Department of Human Services, Child Support Guidelines Calculator
• Mississippi: Mississippi Department of Human Services, Child Support
• Missouri: Missouri Courts, Form 14 Child Support
• Montana: Montana Child Support Services Division
• Nebraska: Nebraska Judicial Branch, Child Support Guidelines
• Nevada: Nevada Revised Statutes §125B.070
• New Hampshire: New Hampshire Judicial Branch, Child Support
• New Jersey: New Jersey Courts, Child Support and Custody
• New Mexico: New Mexico Courts, Child Support
• New York: New York Family Court Act §413
• North Carolina: North Carolina Child Support Services, Guidelines
• North Dakota: North Dakota Health and Human Services, Child Support
• Ohio: Ohio Revised Code §3119.021
• Oklahoma: Oklahoma Human Services, Child Support Calculator
• Oregon: Oregon Child Support Program, Guidelines Calculator
• Pennsylvania: Pennsylvania Code, Rule 1910.16-1
• Rhode Island: Rhode Island Office of Child Support Services
• South Carolina: South Carolina Department of Social Services, Child Support
• South Dakota: South Dakota Codified Laws §25-7-6.2
• Tennessee: Tennessee Department of Human Services, Child Support Guidelines
• Texas: Texas Family Code Chapter 154
• Utah: Utah State Courts, Child Support
• Vermont: Vermont Judiciary, Child Support
• Virginia: Virginia Department of Social Services, Child Support
• Washington: Washington Courts, Child Support Resources
• West Virginia: West Virginia Bureau for Child Support Enforcement
• Wisconsin: Wisconsin Department of Children and Families, Child Support Guidelines
• Wyoming: Wyoming Child Support Program
• NCSL: Child Support Guideline Models by State