Reviewed August 2026

    Child Support in Wisconsin

    Wisconsin calculates child support primarily as a percentage of the paying parent's gross income. This is the state's percentage of income standard, set out in Wisconsin Administrative Code chapter DCF 150. In the basic sole-placement case, the calculation applies a set percentage to the payer's gross income, based on the number of children covered by the order. It does not start from a table built on both parents' combined income, the way income shares states do. Wisconsin's rule provides separate formulas for shared-placement, split-placement, high-income, low-income, and serial-family situations. Several of those formulas do factor in both parents' incomes. The exact calculation a family sees depends on the specific placement arrangement and income levels involved. A Wisconsin support order can be set as part of a circuit court family case, or a parent can apply through the state's Bureau of Child Support. That bureau is Wisconsin's IV-D agency and works with county child support agencies.

    Virdix's document-preparation product currently prepares divorce paperwork for California and Florida cases. This page explains how child support works under Wisconsin law for people researching before they file. It is not legal advice, and Virdix does not prepare or file Wisconsin paperwork. See how Virdix works for California divorces.

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    Child Support in Wisconsin family court

    The percentage of income standard

    Under DCF 150, Wisconsin's basic child support standard applies a percentage to the paying parent's gross income, depending on the number of children the order covers. The percentage rises as the number of children increases. This basic standard applies in sole-placement cases, where one parent has the child the large majority of the time.

    DCF 150 also sets out separate formulas for shared-placement cases, where both parents have significant periods of physical placement. Split-placement cases, involving multiple children placed with different parents, get their own formula too, along with adjustments for high-income and low-income payers.

    Applying through the Bureau of Child Support

    Wisconsin's Bureau of Child Support sits inside the Department of Children and Families. It is the state's IV-D agency and works with a child support agency in each county to handle casework. A parent can apply through the county agency for paternity establishment, a support order, or enforcement.

    A parent already in a circuit court divorce or paternity case can also have support decided directly as part of that case.

    Which court hears the case

    Wisconsin circuit courts hear contested child support matters connected to divorce, custody placement, and paternity cases. Family court commissioners in many counties handle a substantial part of the process, including temporary orders and uncontested matters, before a matter reaches a judge.

    Modifying a Wisconsin order

    A Wisconsin order can be modified after a substantial change in circumstances since it was set. A significant income or placement change counts. County child support agencies also periodically review orders they enforce. They can pursue modification when reapplying the applicable DCF 150 formula to current circumstances would produce a materially different amount.

    A parent seeking modification files with the circuit court that issued the order, or requests a review through the county agency for agency-managed cases.

    Enforcement

    County child support agencies, working with the state Bureau of Child Support, enforce Wisconsin orders using standard IV-D tools. These include income withholding, intercepting state and federal tax refunds, credit bureau reporting, and license suspension for significant arrears.

    A parent owed support who needs enforcement help can open a case with the county agency. This works even when the original order came from a private circuit court filing.

    Sources: Wis. Admin. Code DCF 150, child support percentage of income standard, Wisconsin Department of Children and Families

    Not independently confirmed

    • The exact current percentage figures for 1, 2, 3, and more children under the basic sole-placement standard could not be confirmed in full at drafting time and should be checked against the live DCF 150.035 text before publishing.
    • The specific formula details for shared-placement, split-placement, high-income, and low-income cases should be confirmed against the current DCF 150 text at filing time.

    Child Support in Wisconsin: frequently asked questions

    Does Wisconsin use income shares or a percentage model for child support?+

    Wisconsin uses a percentage of income standard under DCF 150. In the basic sole-placement case, support is calculated as a percentage of the paying parent's gross income, based on the number of children. It does not combine both parents' incomes into a shared table.

    Does a Wisconsin child support calculation ever consider both parents' incomes?+

    Yes, in some situations. DCF 150 includes separate formulas for shared-placement and split-placement cases. Some of those formulas factor in both parents' incomes, unlike the basic sole-placement percentage standard, which is based on the payer's income alone.

    How do I apply for child support services in Wisconsin?+

    Through your county's child support agency, working under the state's Bureau of Child Support, part of the Department of Children and Families, Wisconsin's IV-D agency. A parent can apply for paternity establishment, a new order, or enforcement through the county agency.

    Which court hears child support cases in Wisconsin?+

    Wisconsin circuit courts hear contested support matters connected to divorce, custody placement, and paternity cases. Family court commissioners in many counties handle much of the process, including temporary orders, before a case reaches a judge.

    How do I modify a Wisconsin child support order?+

    Show a substantial change in circumstances since the order was set, such as a significant income or placement change. File this with the circuit court that issued the order, or request a periodic review through the county child support agency for agency-managed cases.

    What enforcement tools does Wisconsin use for unpaid child support?+

    County child support agencies, working with the state Bureau of Child Support, can withhold income and intercept state and federal tax refunds. They can also report arrears to credit bureaus and pursue license suspension once a parent falls significantly behind.

    This page is general information about child support in Wisconsin, not legal advice for your situation. Laws, fees, and procedures change over time; confirm current details with Wisconsin's own courts before relying on anything here. Virdix is not a law firm and is not licensed to practice law in Wisconsin. Virdix does not prepare or file Wisconsin divorce paperwork. It is not a substitute for an attorney licensed in Wisconsin.

    Back to the Wisconsin divorce guide |See all 50 states

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