Child Support Calculator by State
Select your state to calculate child support using the official formula and guidelines. Each state page includes a free calculator, detailed explanations, and frequently asked questions.
Alabama
21% for 1 child · 30% for 2 children
Alaska
20% for 1 child · 27% for 2 children
Arizona
19% for 1 child · 27% for 2 children
Income cap: $360,000/yr
Arkansas
18% for 1 child · 25% for 2 children
California
25% for 1 child · 35% for 2 children
Colorado
20% for 1 child · 30% for 2 children
Income cap: $360,000/yr
Connecticut
21% for 1 child · 29% for 2 children
Income cap: $520,000/yr
Delaware
18% for 1 child · 27% for 2 children
District of Columbia
20% for 1 child · 28% for 2 children
Florida
19% for 1 child · 27% for 2 children
Income cap: $120,000/yr
Georgia
22% for 1 child · 29% for 2 children
Hawaii
21% for 1 child · 30% for 2 children
Idaho
20% for 1 child · 28% for 2 children
Illinois
20% for 1 child · 28% for 2 children
Income cap: $360,000/yr
Indiana
20% for 1 child · 28% for 2 children
Income cap: $360,000/yr
Iowa
21% for 1 child · 29% for 2 children
Kansas
21% for 1 child · 29% for 2 children
Kentucky
22% for 1 child · 30% for 2 children
Louisiana
22% for 1 child · 31% for 2 children
Maine
21% for 1 child · 28% for 2 children
Maryland
20% for 1 child · 28% for 2 children
Income cap: $360,000/yr
Massachusetts
22% for 1 child · 29% for 2 children
Income cap: $400,000/yr
Michigan
21% for 1 child · 30% for 2 children
Minnesota
22% for 1 child · 30% for 2 children
Mississippi
14% for 1 child · 20% for 2 children
Missouri
20% for 1 child · 28% for 2 children
Income cap: $300,000/yr
Montana
19% for 1 child · 27% for 2 children
Nebraska
21% for 1 child · 29% for 2 children
Nevada
18% for 1 child · 25% for 2 children
Income cap: $120,000/yr
New Hampshire
22% for 1 child · 30% for 2 children
New Jersey
19% for 1 child · 28% for 2 children
Income cap: $360,000/yr
New Mexico
19% for 1 child · 27% for 2 children
New York
17% for 1 child · 25% for 2 children
Income cap: $163,000/yr
North Carolina
19% for 1 child · 27% for 2 children
Income cap: $360,000/yr
North Dakota
22% for 1 child · 30% for 2 children
Ohio
19% for 1 child · 28% for 2 children
Income cap: $336,000/yr
Oklahoma
21% for 1 child · 29% for 2 children
Oregon
21% for 1 child · 29% for 2 children
Pennsylvania
20% for 1 child · 29% for 2 children
Income cap: $360,000/yr
Rhode Island
20% for 1 child · 28% for 2 children
South Carolina
21% for 1 child · 29% for 2 children
Income cap: $360,000/yr
South Dakota
20% for 1 child · 28% for 2 children
Tennessee
19% for 1 child · 28% for 2 children
Texas
20% for 1 child · 25% for 2 children
Income cap: $184,620/yr
Utah
20% for 1 child · 28% for 2 children
Vermont
21% for 1 child · 29% for 2 children
Virginia
19% for 1 child · 27% for 2 children
Income cap: $360,000/yr
Washington
20% for 1 child · 28% for 2 children
Income cap: $216,000/yr
West Virginia
21% for 1 child · 29% for 2 children
Wisconsin
17% for 1 child · 25% for 2 children
Wyoming
20% for 1 child · 28% for 2 children
Understanding Child Support Models
Income Shares Model (44 States)
The most common approach, used by 44 states. Both parents' incomes are combined to determine the total child support obligation. Each parent then pays their proportional share. This model aims to give children the same level of support they would have received if the family were intact.
Percentage of Income Model (6 States)
Used by 6 states, this simpler approach calculates child support as a flat percentage of the noncustodial parent's income. The percentage increases with the number of children. The custodial parent's income is typically not a factor in the basic calculation.
Melson Formula (1 States)
A sophisticated variation used by 1 state(s). The Melson formula first ensures each parent can meet their own basic needs (self-support reserve), then allocates support for children's primary needs, and finally distributes a share of remaining income. This model balances children's needs with parental financial reality.