Wisconsin Child Support Laws: Guidelines and Calculations

Child support in Wisconsin follows a structured, percentage-based system designed to provide consistent financial support for children after their parents separate. The Wisconsin Department of Children and Families (DCF) administers the child support program statewide, and courts rely on Administrative Code DCF 150 to set payment amounts.

This guide covers how Wisconsin calculates child support, how to apply for services, how to modify or enforce orders, and what recent legal changes affect parents in 2026.

How to Apply for Child Support in Wisconsin

The Wisconsin DCF provides child support services to all parents in the state. Parents receiving or paying support automatically receive Financial Management Services and Case Management Services through the program.

State law requires all child support orders to include income withholding, whether you owe past-due support or not. Services provided include:

• Locating the non-custodial parent
• Establishing paternity
• Setting and enforcing child support orders
• Processing payments through income withholding
• Access to cash benefits programs (Tribal Temporary Assistance, Badger Benefits, SSI Caretaker Program)

How to Start the Application Process

You can apply for child support services through any of these methods:

• Create a CSOS (Child Support Online Services) account to manage your case online
• Download the application form from the DCF website
• Visit a local child support office in person

Parents who have never received cash benefits from Kinship Care, SSI, Caretaker Supplement, or AFDC pay an annual $35 service fee. Contact the State Equal Rights Opportunity officer at (800) 947-3529 with questions about eligibility or services.

How Is Paternity Established in Wisconsin?

Before a court can order child support, legal paternity must be established for children born to unmarried parents. Wisconsin recognizes several methods under Wis. Stat. 767.80.

Voluntary Paternity Acknowledgment (VPA)

If both parents are at least 18 years old and certain about paternity, they can sign the Voluntary Paternity Acknowledgment form. This form can be completed at the hospital after birth, at a local register of deeds, or at the state Office of Vital Records.

A signed and notarized VPA filed with the Office of Vital Records fully establishes legal paternity. The father's name is then added to the birth certificate. The VPA carries the same legal weight as a court order and creates child support obligations.

Do not sign the VPA if there is any uncertainty about paternity. Instead, contact your local child support agency to arrange genetic testing.

Court-Ordered Paternity

Either parent may petition the court to establish paternity. The court can order genetic testing, and if results confirm paternity, the court enters a paternity judgment. The court may enter a paternity ruling even if the alleged father does not appear at the hearing.

If a DCF-ordered genetic test confirms paternity, the alleged father may be required to pay for the testing.

Acknowledgment of Marital Child

For children born during a marriage, the husband is presumed to be the legal father. This presumption can be challenged, but it serves as the default legal standard.

Establishing paternity grants the father the right to submit a parenting plan and petition for custody. It also requires the custodial parent to notify the father before placing the child for adoption.

How Is Child Support Calculated in Wisconsin?

Wisconsin uses the Percentage of Income Standard under DCF 150. The calculation depends primarily on:

• The paying parent's gross income
• Where the child sleeps (overnight placement schedules)
• The number of children requiring support
• Whether any special circumstances apply

What Counts as Gross Income?

Under DCF 150.02, gross income includes all income and earnings from all sources, whether or not they are taxable. Income can take the form of money, property, or services. This includes:

• Wages, salaries, tips, and commissions
• Bonuses and overtime pay
• Self-employment income
• Investment and interest income
• Retirement and pension benefits
• Rental income
• Social Security benefits (excluding SSI)

Gross income does not include child support received from another case, public assistance payments (such as W-2 or FoodShare), Supplemental Security Income (SSI), foster care payments, or kinship care payments.

Wisconsin Child Support Percentages

Under DCF 150.03, the standard percentages applied to the paying parent's monthly gross income are:

Number of Children	Percentage of Gross Income
1 child	17%
2 children	25%
3 children	29%
4 children	31%
5 or more children	34%

These percentages apply to the primary placement calculation, where one parent has the child for more than 75% of overnight placements.

Shared Placement (25% or More Time Each)

When both parents have court-ordered placement of at least 25% of overnights (92 or more days per year), Wisconsin uses the shared placement formula. Under this method:

• Both parents' incomes factor into the calculation
• Each parent provides basic support in proportion to their time with the child
• Variable costs (such as clothing and school expenses) are divided based on each parent's placement share
• The parent who would owe the higher amount typically pays the difference to the other parent

Download the Shared Placement Worksheet from the DCF website.

High-Income Payer (Over $84,000 Annual Income)

For parents earning more than $84,000 per year ($7,000 per month), lower percentages apply to income above that threshold. A third, even lower tier applies above $150,000 annually ($12,500 per month).

Monthly Income Level	1 Child	2 Children	3 Children	4 Children	5+ Children
First $7,000	17%	25%	29%	31%	34%
$7,000 to $12,500	14%	20%	23%	25%	27%
Above $12,500	10%	15%	17%	19%	20%

Download the High-Income Payer Worksheet for detailed calculations.

Low-Income Payer (Under $1,485 Monthly Income)

For parents with monthly income below $1,485, the court applies low-income payer guidelines under DCF 150 Appendix C. If the payer's income falls below 75% of the federal poverty level, the court may set an amount appropriate for the payer's total economic circumstances. Between 75% and 150% of the federal poverty level, percentages gradually increase as income rises.

Serial Family Cases

When a parent already pays support for children from a previous relationship, the court may reduce the income base for calculating support in later orders. Download the Serial Family Worksheet.

Split Placement

When each parent has primary placement of one or more children (but not all), prorated percentages apply to each parent. Download the Split Placement Worksheet.

Grounds for Deviation

A judge may deviate from the standard percentages when the calculated amount would be unjust or would not serve the child's best interests. Factors that justify deviation include:

• The financial resources and earning capacity of both parents
• The needs of each parent's household
• Extraordinary travel costs related to custody arrangements
• The child's educational, physical, and emotional needs
• Tax consequences for each parent
• Any voluntary unemployment or underemployment

Access all Wisconsin child support worksheets and calculators on the DCF website.

How to Modify Child Support in Wisconsin

Wisconsin law requires the DCF or court to send both parents a notice every three years reminding them of their right to request a support review. A review may result in an increase, decrease, or no change to the existing order.

Grounds for Modification

To request a modification outside the three-year review cycle, you must demonstrate a substantial and ongoing change in circumstances, such as:

• Significant changes in either parent's income
• Loss of employment or reduced work hours
• Changes in custody or placement arrangements
• A child's changed medical or educational needs
• Remarriage or new dependents

2026 Financial Disclosure Requirements

Under Wisconsin Act 82 of 2025, which took effect January 1, 2026, both parents in a child support or maintenance agreement must notify the other parent within 10 days of any significant change in gross income or employment status. Previously, this notification requirement applied only to the paying parent. The updated law also clarified that the notification relates specifically to gross income rather than the previously undefined term "income."

This means that if either parent receives a raise, loses a job, or experiences any other material change in earnings, they must promptly inform the other parent in writing.

How to Request a Review

• If both parents agree, complete Form FA-604 (Stipulation and Order to Amend Judgment for Support)
• Report employment changes to the DCF within 10 days
• Call 1-877-253-3686 to report address changes
• Contact the DCF at 608-422-6250 to report income changes

Only courts can change a court order. The DCF does not charge fees for reviews, but the review process may take up to 180 days. Informal verbal agreements between parents are not enforceable. All modifications must be submitted in writing and approved by the court.

What Happens If You Do Not Pay Child Support in Wisconsin?

Wisconsin law requires all child support orders to include income withholding. If you are employed, your employer automatically deducts child support from your paycheck. When income withholding is insufficient or unavailable, the DCF has broad enforcement powers.

Administrative Enforcement

• Liens on Property: A child support lien is automatically placed on property (including real estate and vehicles) when past-due support reaches $500 or more. As of March 2020, interest debts are included in the total lien amount. The lien is recorded on the Wisconsin Lien Docket, and making a payment plan does not remove the lien.
• License Suspension: Driver's licenses, occupational licenses, and professional licenses may be suspended or revoked for nonpayment.
• Asset Seizure: Bank accounts, savings, mutual funds, and IRAs may be seized if arrears exceed $1,000.
• Property Seizure: Real estate and vehicles may be seized to satisfy past-due support.
• Insurance and Settlement Interception: Insurance settlements, personal injury awards, pension payments, and other lump-sum payments may be intercepted.
• Tax Refund Interception: Federal and state tax refunds may be intercepted to cover arrears.
• Credit Bureau Reporting: Delinquent child support is reported to credit bureaus, which can affect the parent's ability to obtain loans or credit.

Interest on Past-Due Support

Wisconsin charges interest at 0.5% per month (6% annually) on past-due child support. Interest begins accruing once the past-due amount equals or exceeds one month's obligation. Interest accrues even while the parent is making payments on the debt.

Criminal Penalties Under Wis. Stat. 948.22

Failure to pay child support is a criminal offense under Wis. Stat. 948.22. The severity depends on how long the failure continues:

Class A Misdemeanor (under 120 consecutive days): Intentional failure to provide support for fewer than 120 consecutive days carries a maximum penalty of 9 months in jail, a fine up to $10,000, or both, under Wis. Stat. 939.51.

Class I Felony (120 or more consecutive days): Intentional failure to provide support for 120 or more consecutive days is a Class I felony punishable by up to 3 years and 6 months in prison, a fine up to $10,000, or both, under Wis. Stat. 939.50.

A prosecutor may file one felony charge for each 120-day period of nonpayment, even if the failure occurred during one continuous stretch. The state must prove only that the defendant had a support obligation and intentionally failed to pay. Inability to pay is an affirmative defense, but the defendant cannot claim inability if they are employable and have not diligently sought work.

Contempt of Court

In addition to criminal charges, the court may hold a non-paying parent in contempt. Contempt proceedings require the parent to appear in court and explain the failure to pay. Possible consequences include fines, community service, work-release programs, or jail time.

When Does Child Support End in Wisconsin?

Under Wis. Stat. 767.511, child support obligations end when the child:

• Turns 18 years old
• Turns 19, if still enrolled in high school or working toward a GED
• Gets married
• Becomes emancipated by court order
• Joins the U.S. military on active duty
• Dies

Support may continue indefinitely if the child has a severe mental or physical disability and is unable to support themselves.

Note that the obligation to pay arrears does not end when the child ages out. Parents who owe back support must continue paying until the balance is satisfied, and Wis. Stat. 948.22 allows criminal prosecution for nonpayment of arrears even after the child reaches adulthood.

Emancipation in Wisconsin

Minors may petition the court for emancipation before turning 18. To qualify, the minor must demonstrate:

• A legal source of income sufficient for self-support
• That they live separately from their parents or guardians
• The ability to manage their own personal and financial affairs

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