Child Support in Wisconsin: How It's Calculated
Wisconsin uses the Percentage of Income Model (DCF 150) to determine child support obligations. This guide walks through how the formula works, what factors Wisconsin courts consider, and how to modify or enforce an order — with links to official Wisconsin resources.
Percentage of Income Model (DCF 150) in Wisconsin
Wisconsin uses a Percentage of Income Model under Wisconsin Administrative Code DCF 150. The paying parent's gross income is the basis for the calculation. A fixed percentage applies based on the number of children.
Wisconsin's percentages are: 1 child — 17%, 2 children — 25%, 3 children — 29%, 4 children — 31%, 5 or more children — 34% of gross income. Wisconsin provides a shared placement modification when each parent has the child for more than 25% of the time (approximately 92 overnights). When parents approach equal placement, Wisconsin calculates each parent's obligation separately and offsets them based on each parent's proportional income.
Key Factors Wisconsin Courts Consider
- Paying parent's gross monthly income (shared placement: both parents' income)
- Number of children
- Placement percentage — 25%+ time each triggers the shared placement calculation
- Child's health insurance costs
- Work-related childcare expenses
- Special needs of the child
- Low-income payer adjustment
Official Wisconsin Resources
Get an accurate number from an official source
Child support calculations are complex and fact-specific. For an accurate figure, use Wisconsin's official worksheet or consult a licensed family law attorney. This guide explains the framework — it does not produce a binding calculation.
Step-by-Step: How Wisconsin's Formula Works
Here is how Wisconsin applies the Percentage of Income Model (DCF 150) to calculate a child support obligation, step by step:
1. Determine the paying parent's income
Wisconsin applies its formula to the paying (non-custodial) parent's income. Wisconsin's percentages are: 1 child — 17%, 2 children — 25%, 3 children — 29%, 4 children — 31%, 5 or more children — 34% of gross income.
2. Apply the state's percentage to income
A fixed percentage is applied based on the number of children. 1 child — 17%, 2 children — 25%, 3 children — 29%, 4 children — 31%, 5 or more children — 34% of gross income
3. Add health insurance and childcare if applicable
In Wisconsin, health insurance premiums for the child and work-related childcare costs may be added to the base support amount or ordered separately, depending on the specific statute.
4. Apply parenting time adjustments
If the paying parent exercises significant parenting time, Wisconsin may reduce the obligation. Check the specific threshold in the guidelines.
5. Apply income caps and deviation factors
Wisconsin may cap the income subject to the percentage, and courts can deviate from the guideline amount with written findings that the formula result would be unjust or inappropriate.
Document Everything for Your Wisconsin Case
Wisconsin courts rely on documented records — parenting time logs, expense receipts, and payment histories. ReplyCalmly helps you track all of it and generate organized, exportable reports.
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