Probate in Wisconsin: A Complete Guide

Wisconsin offers a streamlined probate system with informal probate as the default, generous small-estate procedures, and unique marital property rules that often substantially reduce what passes through probate. This guide walks through every option, from Transfer by Affidavit through full formal probate.

Does Wisconsin Always Require Probate?

No. Assets that pass outside of probate include those held in a revocable living trust, real estate transferred by a Transfer-on-Death Deed (Wisconsin calls these TOD Deeds), accounts with payable-on-death or transfer-on-death designations, life insurance and retirement accounts with named beneficiaries, joint tenancy property with right of survivorship, and marital property covered by a Marital Property Agreement with non-probate transfer provisions.

Wisconsin's Marital Property System

Wisconsin is one of just nine "community property" states — Wisconsin's version is called "marital property." Most property acquired during marriage is owned 50/50 by both spouses regardless of whose name is on the title. When one spouse dies, the surviving spouse already owns half — only the deceased's half passes through their estate.

Wisconsin spouses can also sign a Marital Property Agreement that designates property as marital and provides for non-probate transfer to the survivor on the first death. A well-drafted marital property agreement can avoid probate entirely on the first death.

Transfer by Affidavit (≤ $50,000)

For estates with personal property of $50,000 or less (gross value), Wisconsin offers Transfer by Affidavit under Wis. Stat. § 867.03. Any heir, the trustee of a revocable trust created by the decedent, or the decedent's guardian at death can use the affidavit — presented directly to the institution holding the asset — to collect money and transfer property without opening formal probate. Real estate is not eligible for this affidavit procedure.

Summary Settlement and Summary Assignment

Wisconsin also offers two streamlined court procedures for small estates:

• Summary Settlement: Available when the estate is $50,000 or less and assets are needed to support the surviving spouse or minor children. The court approves distribution with reduced filings.
• Summary Assignment: Available when the entire estate (after debts) is $50,000 or less. The court assigns property directly to those entitled without ongoing administration.

Informal vs. Formal Probate

• Informal probate: Wisconsin's preferred path. Handled administratively by the Probate Registrar (not a judge). Letters are issued promptly, and the personal representative administers the estate without court supervision of routine actions.
• Formal probate: Required when the will is contested, when there are multiple wills, when notice issues arise, or when other complications need a judge.

How to Open Informal Probate in Wisconsin

1. File an Application for Informal Administration in the Circuit Court (Probate Division) of the county where the deceased was domiciled.
2. Attach the original will, a certified death certificate, and the Probate Estate Inventory worksheet.
3. The Probate Registrar reviews the application — usually within a few weeks — and issues Letters Testamentary or Letters of Administration.

Creditor Claims in Wisconsin

Under Wis. Stat. § 859.01, when the application for administration is filed, the court (or the Probate Registrar in informal administration) sets a claims deadline of not less than 3 nor more than 4 months from the date of that order — so the exact window varies by estate but always falls in that range. The first publication of the Notice to Creditors must occur within 15 days of the order. Direct notice to known creditors is also required and triggers a separate 30-day claim window for those creditors. Claims not filed by the deadline are generally barred under Wis. Stat. § 859.02.

Intestacy in Wisconsin

If there is no will, Wisconsin's intestacy statute, Wis. Stat. § 852.01, applies. For marital property, the surviving spouse generally inherits the deceased's half automatically. For the deceased's non-marital (individual) property: if all of the deceased's surviving children are also the surviving spouse's children, the spouse inherits the entire estate. If the deceased has children from outside the marriage, the spouse takes one-half of the non-marital property and the descendants take the other half (the spouse has no claim to the deceased's share of marital property in that scenario — it passes entirely to the descendants).

Wisconsin Has No State Estate or Inheritance Tax

Wisconsin has no state estate tax and no inheritance tax. Only the federal estate tax applies, and its exemption is currently generous: for 2026, the federal estate and gift tax exemption is $15,000,000 per person ($30,000,000 for a married couple), made permanent by 2025 federal legislation (the One Big Beautiful Bill Act) with future annual inflation adjustments. The vast majority of Wisconsin estates — even sizable ones — owe no estate or inheritance tax of any kind.