Child Support in Wisconsin: How Much Will You Owe?

Quick answer: it depends on both parents' incomes, how many children you have, and the parenting schedule. The calculator on this page turns those numbers into a real guideline estimate in about a minute. It is an educational estimate, not legal advice, and the judge always sets the final amount. FamilyCourtHelp.com is a self-help resource, not a law firm.

Wondering how much child support you will owe or receive in Wisconsin? The state uses one formula everywhere, so the same math applies in every county. This page explains how it works, lets you run a live estimate, and links to a dedicated page for each county at the bottom.

Wisconsin uses a flat Percentage of Income model under Wis. Stat. § 767.511 and DCF 150. Support is calculated as a fixed percentage of the non-custodial parent's adjusted income, 17% of gross income for one child, 25% for two, 29% for three, 31% for four, and 34% for five or more. The custodial parent's income is generally not factored into the base obligation.

What counts as income? Wisconsin runs the formula on gross income, meaning income before taxes come out. Gross income adjusted for the cost of any health insurance the obligor pays for the children. Self-employment income is net of reasonable business expenses.

Parenting time matters directly in Wisconsin: the number of overnights each parent has changes the math itself. Wisconsin uses a shared-care formula when each parent has the child at least 25% of overnights, roughly 92 nights a year or more. Once that threshold is met, the standard flat percentage no longer applies on its own and a separate shared-placement calculation accounts for both parents' incomes and the time the child spends with each. If your overnights fall below that level, the basic Percentage of Income Standard percentages drive the number. The calculator on this page is an estimate only, and the official DCF worksheet controls the actual figure.

When does it end? Wisconsin child support generally ends at age 18 but extends to age 19 if the child is still pursuing a high school diploma or equivalency program. Continuing support for disabled adult children is available.

Can the amount change later? File a motion in circuit court or request review through BCS. A substantial change in circumstances supports modification, and IV-D orders are reviewed every 33 months.

If payments fall behind, Wisconsin has real enforcement tools. Wisconsin BCS enforces through immediate income withholding, tax intercept, license suspension, lien filings, credit reporting, and contempt referrals.

Child support cases in Wisconsin are generally handled through the state's Circuit Court, and Wisconsin Bureau of Child Support (Department of Children and Families) runs the state's child support services program. Forms and local practice can vary, so confirm the current details with your local court or the agency.

The calculator on this page is the same live engine behind our full Child Support Calculator. Enter both incomes, the number of children, and the overnight split, and the estimate updates instantly. The full calculator page adds extras like health insurance, child care costs, and saved scenarios.

Bottom line for Wisconsin: the guideline number comes from incomes, children, and parenting time. Run the estimate on this page, keep your paperwork honest and complete, and let the court confirm the final amount.

Frequently asked questions

How much child support will I owe in Wisconsin?

There is no flat amount. Wisconsin uses the Percentage of Income Standard model under Wis. Stat. § 767.511; Wis. Admin. Code DCF 150, so the number depends on both parents' incomes, the number of children, and the parenting schedule. The calculator on this page gives you a guideline estimate, and the court sets the final amount.

When does child support end in Wisconsin?

Age 18, or up to age 19 if the child is still pursuing a high school diploma or equivalency program.

Can the child support amount be changed later in Wisconsin?

Usually yes, when circumstances change enough. A substantial change in circumstances; a 33-month review period applies for IV-D cases.

Who handles child support cases in Wisconsin?

Cases are generally heard in the state's Circuit Court, and Wisconsin Bureau of Child Support (Department of Children and Families) handles services like locating parents, establishing orders, and collecting payments.