What the rule says
Wisconsin's intestacy framework is shaped by its status as a marital property (community property) state. Wisconsin adopted the Wisconsin Marital Property Act effective January 1, 1986, becoming the only Midwestern state with a community property regime. The intestacy statute, Wis. Stat. § 852.01, distributes the estate based on family structure with marital property characterization in mind:
Marital property
Marital property is property acquired by either spouse during marriage with marital funds or labor. The decedent's interest in marital property is one-half (the surviving spouse already owns the other half). At death, the decedent's one-half passes per the intestacy formula.
Intestacy formula
- Spouse and all descendants are mutual: The spouse takes the entire net estate (decedent's interest in all marital property + decedent's separate property). - Spouse and at least one descendant from prior relationship: The spouse takes one-half of the deferred marital property and one-half of the decedent's separate property. Descendants take the other half of each. - Spouse but no descendants: The spouse takes the entire net estate. - Descendants but no spouse: Descendants take the entire estate by representation.
What this means in practice
Wisconsin's framework reflects both the marital property regime and a UPC-like spouse-favorable intestacy:
- Wisconsin resident dies without a will, leaving a surviving spouse and three mutual children. Estate is $400,000 marital property. Spouse takes the entire $400,000 (decedent's $200,000 interest in marital property goes to spouse via intestacy; spouse already owned the other $200,000 as marital property). - Wisconsin resident dies without a will, leaving a surviving spouse and one child from prior relationship. Estate: $200,000 marital property + $100,000 separate property. Spouse takes $100,000 (decedent's interest in marital property is split — spouse takes $50,000 of decedent's $100,000 marital interest plus already owns $100,000 of marital property); plus $50,000 of decedent's separate property = $250,000 total. Child takes $50,000 of marital property + $50,000 separate property = $100,000.
The marital property classification produces outcomes that other states' separate-property frameworks do not.
What you can do about it
A valid Wisconsin will gives complete control:
- Wisconsin will requirements (Wis. Stat. § 853.03). A will must be in writing, signed by the testator, and signed by two competent witnesses. - Wisconsin recognizes harmless-error doctrine under § 853.03(2). - Self-proving affidavits are recognized. - Beneficiary designations override intestacy. - Spousal election. Under Wis. Stat. § 861.02, a surviving spouse can elect against the will. The marital property regime affects how the elective share interacts with property characterization. - Marital property classification. Covered separately as Wisconsin's distinctive rule.
Who this affects most
Wisconsin's intestacy formula is most consequential for:
- Married Wisconsin residents with marital property accumulated during marriage - Blended families where the marital/separate distinction affects descendant shares - Out-of-state relocators with substantial pre-marriage separate property - Estate planners coordinating Wisconsin marital property with intestate distribution
Wisconsin's framework reflects its unique Midwestern adoption of community property. A will is the only mechanism to direct different distribution.