In Wisconsin, Social Security Disability Insurance (SSDI) counts as gross income for child support under Wis. Admin. Code § DCF 150.02, but Supplemental Security Income (SSI) is excluded entirely. When a child receives a derivative SSDI benefit based on a parent's disability, the court subtracts that benefit from the payer's obligation under DCF 150.03(5). The standard rate for one child is 17% of gross income.
Child support and disability in Wisconsin intersect at three points: how a disabled parent's benefits are counted, how a child's derivative benefits offset the obligation, and how support may continue for a disabled child. This guide explains each rule with statute citations, the DCF 150 percentage standard, and 2026 filing details. It is written for parents navigating disability income, whether that income is SSDI, SSI, or a child's dependent benefit under 42 USC 402(d).
Key Facts: Wisconsin Divorce and Child Support
| Item | Wisconsin Rule | Statute |
|---|---|---|
| Divorce filing fee | $184.50 base; $194.50 with support request (verify locally) | Wis. Stat. § 814.61 |
| Post-filing waiting period | 120 days before final hearing | Wis. Stat. § 767.335 |
| State residency | 6 months in Wisconsin | Wis. Stat. § 767.301 |
| County residency | 30 days in the filing county | Wis. Stat. § 767.301 |
| Grounds | No-fault: irretrievable breakdown | Wis. Stat. § 767.315 |
| Property division | Community property (marital property, presumed 50/50) | Wis. Stat. § 767.61 |
| Child support model | Percentage-of-income standard (17% for one child) | Wis. Stat. § 767.511 |
How Wisconsin Calculates Child Support
Wisconsin calculates child support using a percentage-of-income model, applying a fixed percentage to the paying parent's gross income: 17% for one child, 25% for two, 29% for three, 31% for four, and 34% for five or more children. Unlike the income-shares model used by 41 states, Wisconsin's standard under Wis. Stat. § 767.511 and Wis. Admin. Code § DCF 150.03 considers only the payer's income for basic non-shared cases.
The percentages step down at higher income tiers. The standard rate applies to monthly income below $7,000 (about $84,000 annually). Income between $7,000 and $12,500 per month uses roughly 80% of the standard rate, so one child drops to about 14%. Income above $12,500 per month applies about 60% of the standard, dropping to 10% for one child. These tiered brackets prevent windfall support awards at very high income levels while keeping the baseline calculation simple and predictable for most Wisconsin families.
Shared placement changes the math. When each parent has the child for at least 25% of overnights (92 nights per year), the court applies the shared-placement formula in DCF 150.035, which offsets each parent's obligation against the other and factors both incomes. A parent with 50/50 placement and higher earnings still pays, but the amount is substantially reduced. Effective January 1, 2026, Wisconsin parents must notify each other within 10 days of any employment or significant income change that could affect an existing support order.
How SSDI Is Treated for Child Support in Wisconsin
Social Security Disability Insurance (SSDI) counts as gross income for Wisconsin child support because it is an earned insurance benefit, not means-tested welfare. Under Wis. Admin. Code § DCF 150.02, gross income includes all income from all sources unless specifically excluded, and SSDI is not on the exclusion list. A disabled parent receiving $2,000 monthly in SSDI would face a 17% obligation of $340 per month for one child before adjustments.
The practical significance of this rule is that a disabled parent cannot avoid a support obligation simply because their income is disability-based. Wisconsin courts treat SSDI as replacement income for lost wages, so the Wis. Stat. § 767.511 percentage standard applies to it exactly as it would to a paycheck. This differs sharply from SSI, discussed below. Child support disability Wisconsin cases frequently turn on this SSDI-versus-SSI distinction, because the classification of the benefit determines whether it enters the calculation at all.
When a disabled parent's income is low, Wisconsin protects a subsistence floor. The DCF 150 Appendix C low-income schedule, updated annually against federal poverty guidelines and effective March 1, 2026, reduces percentages for payers earning between 75% and 150% of the poverty line. At the lowest income levels, the one-child rate falls to roughly 11.22% rather than 17%. This low-income adjustment ensures a disabled parent on modest SSDI retains enough to meet basic needs while still contributing to the child's support.
Why SSI Is Exempt from Child Support Income
Supplemental Security Income (SSI) is completely excluded from gross income when Wisconsin calculates child support, because SSI is a means-tested public assistance benefit for people with limited income and resources. Wis. Admin. Code § DCF 150.02(13)(a)10.g. expressly excludes SSI under 42 USC 1381 to 1383f and state supplemental payments. A parent whose only income is SSI has a calculated support obligation of $0 under the standard.
The reason for this exemption is policy-driven. SSI exists to provide a bare subsistence income to disabled individuals who have not accumulated enough work credits to qualify for SSDI. Counting SSI as income and then extracting 17% of it would defeat the federal purpose of the program by pushing the recipient below the subsistence level Congress set. Wisconsin's exclusion list also carves out food stamps under 7 USC 2011 to 2036, most public assistance under Chapter 49, foster care payments, and kinship care payments, treating them all as non-income for support purposes.
This creates a critical distinction disabled parents must understand. A parent receiving SSDI (an earned insurance benefit) will owe child support on that income, while a parent receiving SSI (welfare) will not. Many disabled individuals receive concurrent benefits, drawing a small SSDI payment topped up by SSI. In those concurrent cases, only the SSDI portion enters the Wisconsin child support calculation; the SSI supplement remains fully exempt under DCF 150.02.
The Child's Derivative SSDI Benefit and the Support Offset
When a child receives a derivative Social Security benefit based on a parent's disability, Wisconsin courts adjust the payer's child support by subtracting the child's benefit under Wis. Admin. Code § DCF 150.03(5). If a disabled payer owes $340 monthly but the child receives a $300 derivative SSDI benefit through that parent, the court credits the $300, and the payer typically owes the difference. This offset is authorized under 42 USC 402(d).
The mechanics are specific. The court may consider a child's benefit under 42 USC 402(d), based on a parent's entitlement to federal disability or old-age insurance benefits, and adjust a payer's obligation by subtracting the amount of the child's benefit received by the payee (the parent receiving support). Wisconsin's rule contains an important limit: in no case may this adjustment require the payee to reimburse the payer for any portion of the child's benefit. If the child's benefit exceeds the calculated support, the payer owes nothing further but is not entitled to a refund of the surplus.
When the disabled payer, rather than the payee, receives the child's benefit directly, the rule flips the comparison. In that situation the support amount is either the percentage applied to the payer's income or the amount of the child's benefit, whichever is greater. In shared-placement cases governed by DCF 150.035, the child's derivative benefit is divided between the parents in proportion to the placement time each parent exercises, so a parent with 40% of overnights would be allocated 40% of the benefit for calculation purposes. Disability income child support in Wisconsin thus rewards families where the disabled parent's SSDI generates a dependent benefit the child actually receives.
Support for a Disabled Child in Wisconsin
Wisconsin child support ordinarily ends when a child turns 18, or up to age 19 if the child is still pursuing a high school diploma or its equivalent, under Wis. Stat. § 767.511. Support for a disabled child beyond that age is not automatic in Wisconsin, and the state's treatment of adult disabled children is narrower and more contested than in many states. Parents should not assume support continues indefinitely without a specific court order.
Wisconsin does not have a broad statutory command requiring parents to fund an indefinite support obligation for every adult child who cannot self-support, and some Wisconsin authorities read Wis. Stat. § 49.90 as declining to impose such a duty. Where extended support is ordered for a disabled adult child, courts generally require proof that the disability existed before age 18, that the child requires substantial care and supervision, and that the child is not and will not be capable of self-support. Because Wisconsin authorities have described this area inconsistently, a parent seeking or opposing extended support should confirm the current statute text and case law with a licensed Wisconsin family law attorney before relying on any particular outcome.
A distinct issue arises when the child, rather than the parent, is disabled and receives SSI. A child's own SSI eligibility depends on household income and resources, so a large child support order can reduce or eliminate the child's SSI. Families of a disabled child often coordinate support through a special needs trust so that court-ordered payments do not disqualify the child from SSI or Medicaid. The court also assigns responsibility for the disabled child's health care expenses, including insurance premiums, uninsured medical costs, and prescriptions, under Wis. Stat. § 767.513.
Modifying Child Support When Disability Changes
A Wisconsin parent may petition to modify child support when a substantial change in circumstances occurs, and the onset of disability, a new SSDI award, or a change in a child's derivative benefit each qualifies as such a change under Wis. Stat. § 767.59. Wisconsin also presumes a substantial change if 33 months have passed since the last order. A modification adjusts support prospectively from the date of filing, not retroactively.
Timing matters enormously. Because a court cannot modify support retroactively before the date the modification petition is filed, a parent who becomes disabled and can no longer pay the existing amount should file to modify immediately rather than simply stopping payments. Arrears that accrue before filing remain fully owed and accrue simple interest at 1 percent per month under Wis. Stat. § 767.511. A disabled parent who waits six months to file continues to owe the full pre-filing amount plus interest, even if their income dropped to SSI-only.
When a disabled parent's SSDI triggers a new derivative benefit for the child, both parents may seek to recalculate. The payer will seek the DCF 150.03(5) offset for the child's benefit, and the payee may seek confirmation that the offset does not require reimbursement. A parent whose income shifts from wages to SSI entirely may see the calculated obligation drop toward the low-income floor or to zero, but only a court order — not the income change itself — actually reduces the legal obligation. Disabled parent child support relief in Wisconsin requires filing the modification.
Filing for Divorce and Support in Wisconsin (2026)
The Wisconsin divorce filing fee is $184.50 for a basic petition, rising to $194.50 when the petition requests child support or maintenance, as of March 2026 — verify with your local clerk. E-filing adds a $20 convenience fee, and service of process through the sheriff or a private server costs $50 to $100. Total uncontested court costs typically run $250 to $400 before attorney fees.
Wisconsin imposes a dual residency requirement under Wis. Stat. § 767.301: at least one party must have lived in Wisconsin for 6 months and in the filing county for 30 days before commencing the action. These are jurisdictional; filing before meeting them means the court lacks authority and the case is dismissed, forcing a restart. Wisconsin is a pure no-fault state under Wis. Stat. § 767.315, so the only ground is that the marriage is irretrievably broken.
Disabled and low-income filers can request a fee waiver. A filer at or below 125% of federal poverty guidelines may file Form CV-410A (Petition for Waiver of Fees and Costs) with the Clerk of Circuit Court before or at the time of filing. For a single person in 2026, 125% of the poverty level is roughly $19,050 in annual income. A disabled parent whose only income is SSI will almost always qualify for this waiver, removing the $184.50 filing barrier entirely. Confirm current forms and thresholds at the Wisconsin Court System website (wicourts.gov) and your county clerk.