Intestate Succession in Wisconsin: Who Inherits When There's No Will

When someone dies in Wisconsin without a valid will, they did not leave their estate to the government or forfeit it to the state. They left it to the people Wisconsin law designates as their heirs — in a specific order, in specific shares, determined by Wisconsin Statute 852.

The problem is that Wisconsin's default distribution rules may not match what the decedent actually wanted. Children from a previous marriage can end up with more than a surviving spouse expected. Unmarried partners receive nothing. Stepchildren inherit only if legally adopted. And Wisconsin's unique marital property system adds complexity that other states simply don't have.

Wisconsin's Marital Property System Changes Everything

Before applying the intestate succession rules, the estate administrator must understand what property is actually subject to those rules.

Wisconsin is a community property state. Under the Wisconsin Marital Property Act, virtually all property acquired by a married couple during the marriage is presumed to be marital property — each spouse owns an undivided 50% interest. When one spouse dies, only their 50% share is subject to will or intestate succession. The surviving spouse's 50% is not part of the estate at all.

This matters enormously for the first calculation: what does the estate actually contain?

For example, if a couple has a joint bank account with $100,000, the decedent's share is $50,000 — not $100,000. The surviving spouse already owns the other $50,000. Intestate succession applies only to the decedent's $50,000.

Real estate titled as survivorship marital property passes directly to the surviving spouse outside of probate entirely — it is not part of the estate subject to intestate succession at all.

The Intestate Succession Order Under Wisconsin Statute 852

Wisconsin law distributes a decedent's estate to relatives in the following priority:

When the Decedent Is Survived by a Spouse

The surviving spouse's share depends on whether the decedent also has surviving descendants (children, grandchildren):

Scenario 1: All descendants are also descendants of the surviving spouse The surviving spouse inherits the entire estate. Children and grandchildren receive nothing from the probate estate (though they may inherit non-probate assets through beneficiary designations).

Scenario 2: The decedent has descendants who are NOT descendants of the surviving spouse (children from a prior relationship) The estate is split: the surviving spouse receives one-half and the decedent's descendants share the other one-half. This surprises many blended families — it means a stepparent and biological children from the first marriage can end up co-owning property.

If there are no descendants but surviving parents of the decedent: the spouse receives the entire estate.

When There Is No Surviving Spouse

The estate passes in this order:

1. Descendants (children, grandchildren, great-grandchildren) — share equally per stirpes
2. Parents — if no descendants survive
3. Siblings and their descendants — if no descendants or parents survive
4. Grandparents and their descendants — if none of the above survive
5. The state of Wisconsin — only if absolutely no qualifying relatives can be identified (this is rare)

Per stirpes distribution: if a child predeceased the decedent but left children of their own, those grandchildren step into their parent's share and divide it equally among themselves.

What "Descendants" Includes and Excludes

Wisconsin law includes biological children, legally adopted children, and children born outside of marriage (if paternity was established). It does not include:

• Stepchildren (unless legally adopted)
• Foster children (unless legally adopted)
• Unmarried partners — regardless of how long the relationship lasted

This last point catches many families off guard. A partner of 20 years who was never legally married to the decedent receives nothing under intestate succession. Life insurance policies and beneficiary designations on retirement accounts are the only protections for unmarried partners — and only if they were actually named.

Half-Blood Relatives

Wisconsin treats half-blood relatives (sharing only one parent with the decedent) the same as full-blood relatives under intestate succession. A half-sibling inherits the same share as a full sibling.

What Dying Without a Will Costs the Estate

Dying intestate — without a valid will — does not necessarily mean expensive or complicated probate. The same probate pathways apply: Transfer by Affidavit for small estates under $50,000, and Informal or Formal Administration for larger estates.

What intestacy does mean:

1. The court decides, not the family. There is no negotiation. The statutory formula applies mechanically.

2. The personal representative is appointed by the court. Under a will, the testator chooses their executor. Without a will, the court appoints an administrator — typically the surviving spouse first, then adult children, then other heirs. If heirs cannot agree, the court appoints someone.

3. A guardian for minor children must be separately appointed. A will can name a guardian for minor children. Without one, the court decides who raises them in a separate proceeding.

4. Blended families may face conflict. The scenario where a surviving spouse and stepchildren inherit together — and must agree on what to do with the marital home — is a frequent source of litigation.

How to Administer a Wisconsin Intestate Estate

The process is similar to probate with a will, with a few differences:

1. File at the county Register in Probate for the county where the decedent was domiciled.
2. Determine heirship through a formal Proof of Heirship (Form PR-1806), documenting all legal heirs and their relationship to the decedent.
3. Apply for Informal Administration (Form PR-1801) if assets exceed $50,000, or use the Transfer by Affidavit (PR-1831) for smaller estates.
4. The court appoints an administrator rather than approving a named executor.
5. Proceed through the standard probate timeline — inventory, creditor notice, Schedule CC tax clearance, final distribution.

For small estates where the heirs are straightforward — surviving spouse only, or adult children with no blended family complications — dying without a will may not significantly change the outcome. The surviving spouse would inherit everything under intestate succession anyway.

The complications arise when the natural distribution under statute does not match what the decedent wanted, or when family relationships are complex.

If You're the Administrator of an Intestate Estate

Your immediate steps:

1. Do not distribute anything until you have established who the legal heirs are under Wis. Stat. 852. Assumptions can be expensive.
2. Check whether Wisconsin's marital property rules reduce the probate estate by excluding the surviving spouse's existing 50% interest.
3. Audit all assets for beneficiary designations and survivorship titling — many assets will pass outside of intestate succession entirely.
4. Contact the county Register in Probate to confirm which forms and local procedures apply.

The Wisconsin Estate Settlement Guide includes the complete intestate succession distribution chart for Wisconsin, worked examples for blended families, and the specific forms required to open an intestate probate case — including how to handle the Proof of Heirship when the family tree is complicated.

See more Wisconsin guides →