Wisconsin Child Support — Calculator, Laws & Guide (2026)

Understanding Wisconsin child support laws helps both custodial and non-custodial parents know their rights and obligations. This comprehensive Wisconsin child support guide covers how payments are calculated, what income counts, when support can be modified, and how orders are enforced. Whether you are going through a divorce, seeking a modification, or dealing with non-payment, this guide explains Wisconsin’s child support system in plain language.

Verified against Wisconsin statutes and federal OCSE guidelines as of May 2026.

Wisconsin Child Support Overview

Wisconsin uses the percentage of income model. Child support is calculated as a set percentage of the non-custodial parent’s income, based on the number of children. This model is simpler but considers only one parent’s income.

How Wisconsin Calculates Child Support

The Wisconsin child support calculation considers multiple factors:

1. Determine each parent’s gross income — wages, salary, commissions, bonuses, self-employment income, investment income, and other sources.
2. Calculate combined parental income — add both parents’ adjusted gross incomes together.
3. Apply the guideline schedule — Wisconsin’s guidelines provide a base support amount based on combined income and number of children.
4. Prorate between parents — each parent’s share is proportional to their percentage of the combined income.
5. Add healthcare and childcare costs — these are added to the base amount and divided proportionally.
6. Apply adjustments — parenting time credits, other child obligations, and special circumstances may adjust the final amount.

Online calculator: Use our child support estimator below to calculate your estimated obligation.

What Counts as Income in Wisconsin

Gross income from all sources, whether or not taxable, including wages, salaries, commissions, bonuses, self-employment income, investment income, rental income, Social Security benefits, and pensions. Excluded: child support received, foster care payments, kinship care payments, public assistance benefits, SNAP/food stamps, and Supplemental Security Income (SSI).

Imputed income: YES. Courts may impute income to a parent who is voluntarily unemployed or underemployed without good cause, based on earning capacity. Factors include recent work experience, earnings history, job skills, education, vocational evaluations, job-seeking diligence, and employment barriers. A parent’s incarceration may NOT be treated as voluntary unemployment.

Deviation factors: Financial resources of the child; financial resources of both parents; maintenance received by either party; self-support needs of each party; needs of other legal dependents; standard of living the child would have enjoyed; desirability of custodian remaining home as full-time parent; cost of child care and value of custodial services; substantial placement time with both parents; extraordinary travel expenses for placement; physical, mental, and emotional health needs of the child including insurance costs; educational needs of the child; tax consequences; best interests of the child; earning capacity of each parent; any other relevant factors. (Wis. Stat. 767.511(1m))

Healthcare & Childcare in Wisconsin Child Support

Health insurance: Court orders must address medical support if a parent’s income exceeds 150% of the federal poverty level. A parent may be ordered to provide health insurance if the cost does not exceed 10% of the insuring parent’s monthly income. Parents below 150% FPL cannot be ordered to provide private insurance unless there is no cost. Uninsured medical expenses are divided based on each parent’s ability to pay.

Childcare costs: Childcare is classified as a variable cost along with tuition and special needs. In shared- and split-placement cases, variable costs are assigned in proportion to each parent’s share of placement, with consideration for income disparity. Courts also consider daycare costs when deciding whether to impute income to an unemployed parent.

When Does Wisconsin Child Support End?

In Wisconsin, child support generally ends when the child reaches 18, extended to 19 if the child is still enrolled in high school or pursuing a GED/high school equivalency. Past-due support remains enforceable for up to 20 years after the youngest child turns 18.. However, support may continue or end earlier based on:

• The child graduates from high school (if still a minor)
• The child becomes emancipated (marriage, military service, self-supporting)
• The child has special needs requiring ongoing support
• College support: NO automatic statutory requirement. However, courts may consider a child’s educational needs as a deviation factor under Wis. Stat. 767.511(1m)(g), and if parents stipulate to college support in a divorce judgment, that agreement is enforceable by contempt proceedings.

Modifying Wisconsin Child Support

When to modify: Substantial change in circumstances required. Specifically: a change in placement arrangement, a sizeable change in income producing a monthly support difference of more than 50 dollars, incarceration, disability, or other unforeseen events. A routine review is available every 3 years without needing to show substantial change.

How to modify: Either parent may request a review from the local county child support agency at no fee. The agency has up to 180 days to complete the review. Reviews may occur more frequently than every 3 years upon showing a substantial change and submitting a written request. Parents may also petition the court directly under Wis. Stat. 767.59.

Either parent can request a modification. Changes are typically not retroactive to before the date of filing the modification request.

Wisconsin Child Support Enforcement

Wisconsin has multiple tools to enforce child support orders when a parent fails to pay:

• Income withholding (wage garnishment
• all new orders); child support lien docket at 500 dollars past-due (public record
• reported to credit bureaus); driver’s license
• professional license
• and recreational license suspension at 3 months arrears; bank account seizure at 1000 dollars or 3 months arrears (whichever is greater); federal and state tax refund intercept; property seizure; passport denial at 2500 dollars federal arrears; contempt of court (fine up to 500 dollars and/or up to 30 days imprisonment per finding); criminal nonsupport prosecution.

Contact Bureau of Child Support, Wisconsin Department of Children and Families (DCF), with day-to-day case management by 72 county and tribal child support agencies. at https://dcf.wisconsin.gov/cs/home for enforcement assistance.

Additional Wisconsin rules: Wisconsin is one of few states using the percentage-of-income model rather than income shares. The shared-placement formula kicks in at 25% placement time (92 days/year) with both parents. High-income payers have a three-tier system with reduced percentages above 84000/year and 150000/year. Low-income payer graduated rates (DCF 150 Appendix C) are updated annually based on federal poverty guidelines. Any marital settlement agreement limiting a payee’s ability to seek modification upon substantial change is against public policy and unenforceable. Past-due support is enforceable for up to 20 years after the youngest child turns 18.

Official Sources & Resources

• Bureau of Child Support, Wisconsin Department of Children and Families (DCF), with day-to-day case management by 72 county and tribal child support agencies.: https://dcf.wisconsin.gov/cs/home
• Federal OCSE: acf.hhs.gov/css
• Cornell LII — Child Support: law.cornell.edu
• Wisconsin Guidelines Statute: Wis. Stat. 767.511 (child support determination); Wis. Admin. Code ch. DCF 150 (Child Support Standard with percentage rates, income definitions, and calculation methods).

Last verified May 2026. Contact us if you notice outdated information.

Estimate Your Child Support

Use our free child support estimator to calculate estimated monthly payments. Enter both parents’ incomes, number of children, and custody arrangement to see a personalized breakdown based on your state’s formula.

Related Guides

• Wisconsin Divorce Process Guide
• Wisconsin Child Custody Guide
• Wisconsin Alimony Guide
• All Child Support Guides