How it works · official guideline
How child support is calculated in Iowa
Iowa courts and Child Support Services use the Iowa Supreme Court’s Child Support Guidelines (Iowa Court Rules ch. 9, effective Jan. 1, 2026), which reflect both parents' duty to support their children in proportion to their incomes. Support is computed from each parent’s adjusted net monthly income and the schedule, with separate methods for joint (equally shared) physical care and credits for extraordinary visitation.[1]
Key facts: child support in Iowa
| Guideline model | Income shares[1] |
|---|---|
| Income counted | Adjusted net monthly income (gross income minus taxes and listed deductions)[1] |
| Shared parenting time | Visitation credit 15% (128–147 overnights), 20% (148–166), 25% (167+ short of equal care)[1] |
| Minimum order | Visitation credit cannot reduce support below $50 (1 child), $75 (2), $100 (3+)[1] |
| Guideline last checked | October 26, 2026 |
Iowa’s model
Income shares
Income shares: combined adjusted net monthly income, then Schedule of Basic Support Obligations, each parent’s share in proportion to income.
No official calculator confirmed yet
Child Support Services (Iowa HHS) — 'How is the amount of child support set?'The state child support agency or your court clerk can run the official numbers.
Why no calculator here? We publish a calculator only after it reproduces the state’s official numbers exactly. We haven’t matched Iowa’s yet.
From the official text
The rules behind Iowa’s numbers
The guideline is Iowa Court Rules ch. 9, Child Support Guidelines (Iowa Legislature), rules 9.1–9.27. Open each rule to read the exact words.
- Income counted
Adjusted net monthly income (gross income minus taxes and listed deductions)
The calculation starts from gross monthly income — reasonably expected income from all sources — and converts it to adjusted net monthly income before using the schedule.[1]
Official text · Iowa Ct. R. 9.5(1), 9.14
“To compute the guidelines amount of child support, first compute the adjusted net monthly income, then proceed to either the Basic Method of Child Support grid in rule 9.14(2) or the Joint (Equally Shared) Physical Care Method of Child Support Calculation grid in rule 9.14(3), as appropriate.”
- Shared parenting time
Visitation credit 15% (128–147 overnights), 20% (148–166), 25% (167+ short of equal care)
A noncustodial parent with court-ordered visitation above 127 overnights a year gets a 15%, 20% or 25% credit on their share of the basic obligation; joint (equally shared) physical care uses a separate offset method.[1]
Official text · Iowa Ct. R. 9.9
“If the noncustodial parent’s court-ordered visitation exceeds 127 days per year, the noncustodial parent will receive a credit to the noncustodial parent’s share of the basic support obligation in accordance with the following table:”
- Minimum order
Visitation credit cannot reduce support below $50 (1 child), $75 (2), $100 (3+)
The extraordinary visitation credit may not take support below $50 for one child, $75 for two or $100 for three or more.[1]
Official text · Iowa Ct. R. 9.9
“The extraordinary visitation credit may not reduce support below $50 for one child, $75 for two children, or $100 for three or more children.”
- Low income
Low-income adjustment built into the shaded area of the schedule
Schedule amounts are adjusted in a shaded low-income area; the adjustment does not apply in joint (equally shared) physical care.[1]
Official text · Iowa Ct. R. 9.3(2)
“The basic support obligation amounts have been adjusted in the shaded area of the Iowa Schedule of Basic Support Obligations in rule 9.26 for low-income”
- Departing from the guideline
Rebuttable presumption; zero support if the only income is SSI
The guideline amount is presumed correct but may be adjusted for the children’s needs or to do justice between the parties; support is zero when the noncustodial parent’s only income is SSI.[1]
Official text · Iowa Ct. R. 9.4
“There is a rebuttable presumption that the amount of child support which would result from the application of the guidelines prescribed by the supreme court is the correct amount of child support to be awarded.”
Guideline: Iowa Court Rules ch. 9, Child Support Guidelines (Iowa Legislature), rules 9.1–9.27, checked October 26, 2026.
Estimate and general information only — not legal advice. MediationList is a directory, not a law firm, and doesn’t endorse any mediator. Guidelines change; confirm with the state child support agency or your court (sources checked October 26, 2026). See also divorce laws in Iowa and child support in every state.
Sources
Iowa’s child support guideline, rules and official tools, read on the official sites, with the date we checked each.