How child support is calculated in Iowa
How the guideline works, what the official calculator needs, and the low-income and health insurance rules.
Checked against official sources: Oct 25, 2026.
Short answer
Iowa uses the income-shares model: both parents' incomes count, and each parent pays a share of the child's support. Each parent's adjusted net income (gross income minus taxes and other allowed deductions) is added together, and the Iowa Supreme Court schedule gives the basic support for that combined income.
- Model
- Income shares
- Official calculator
- Official Iowa child support calculator
Where the real number comes from in Iowa
Each parent's adjusted net income (gross income minus taxes and other allowed deductions) is added together, and the Iowa Supreme Court schedule gives the basic support for that combined income. Each parent pays a share based on their part of the income. A paying parent with more than 127 overnights a year gets a credit, and there is a separate formula for equally shared physical care.
Law: Iowa Court Rules ch. 9 (Child Support Guidelines); Iowa Code 598.21B
We don't estimate Iowa's amount here: its formula uses both parents' incomes and other facts, and a home-made number could mislead you. The official tool gives the real starting number:
The Iowa guideline, step by step
Each parent's adjusted net income (gross income minus taxes and other allowed deductions) is added together, and the Iowa Supreme Court schedule gives the basic support for that combined income. Each parent pays a share based on their part of the income. A paying parent with more than 127 overnights a year gets a credit, and there is a separate formula for equally shared physical care.
Law: Iowa Court Rules ch. 9 (Child Support Guidelines); Iowa Code 598.21B
The low-income rule in Iowa
When the paying parent's adjusted net income falls in the shaded low-income area of the schedule, a low-income adjustment applies: in Area A only that parent's income is used (a minimum order), and in Area B the lower of two calculations is used. Cash medical support is not ordered for minimum orders in Area A.
Law: Iowa Ct. R. 9.12 and schedule
State guidelines may not treat time in jail or prison as choosing not to work, when support is set or changed.
Law: 45 CFR 302.56(c)(3)
Medical support in Iowa
Every order must include medical support. The court uses the Medical Support Table to decide what health plan cost is reasonable and, if no plan is ordered, a cash medical support amount; the reasonable-cost amount must be stated in the order.
Law: Iowa Ct. R. 9.12; Iowa Code 252E.1A
The model in plain words
Income shares means the child should get what the parents would spend if they lived together. Both incomes are combined, and each parent's share of the total sets their part.
Every state must have one set of child support guidelines, review them at least every 4 years, and use the guideline amount unless a written finding says it would be unjust.
Law: 45 CFR 302.56
In nearby states
From income to an order in Iowa
Collect proof of income
Recent pay stubs and last year's tax return are the usual starting point.
Check the official calculator
The official number comes from Official Iowa child support calculator.
Count health and child care
Insurance and child care often go on top of the basic amount.
Ask for an order
To get an order, contact Iowa Department of Health and Human Services, Child Support Services (CSS) (1-888-229-9223) · Apply online
Get help
Free help: Iowa Legal Aid.
Free help in Iowa
Questions about the Iowa guidelines
How does Iowa figure child support?
Each parent's adjusted net income (gross income minus taxes and other allowed deductions) is added together, and the Iowa Supreme Court schedule gives the basic support for that combined income. Each parent pays a share based on their part of the income. A paying parent with more than 127 overnights a year gets a credit, and there is a separate formula for equally shared physical care.
Where is the Iowa child support calculator?
How does Iowa treat low incomes?
When the paying parent's adjusted net income falls in the shaded low-income area of the schedule, a low-income adjustment applies: in Area A only that parent's income is used (a minimum order), and in Area B the lower of two calculations is used. Cash medical support is not ordered for minimum orders in Area A.
Who pays for the child's health insurance in Iowa?
Every order must include medical support. The court uses the Medical Support Table to decide what health plan cost is reasonable and, if no plan is ordered, a cash medical support amount; the reasonable-cost amount must be stated in the order.