Wisconsin probate is governed by Wisconsin Statutes Chapters 851–882, filed in the Circuit Court in the county of the deceased's domicile. Wisconsin is not a Uniform Probate Code state, but its unsupervised administration procedure (§ 856.23) comes close to UPC informal probate in practice — the Personal Representative acts independently without mid-administration court approval, and the estate closes by filing a Closing Certificate (§ 862.01) rather than attending a formal closing hearing. Wisconsin's creditor period is 3 months from first publication — shorter than Kansas (4 months) and Missouri (6 months).
Pursue unsupervised administration when available. If the will authorizes unsupervised administration or all interested parties consent in writing, request it at the opening hearing. It eliminates mid-administration court filings for most estate actions and replaces the closing hearing with a Closing Certificate — cutting months off the typical supervised probate timeline and significantly reducing costs.
When Unsupervised Administration Is Available
Wisconsin's unsupervised administration (§ 856.23) is available when:
- The will expressly authorizes unsupervised administration, OR
- All interested parties (heirs, legatees, surviving spouse) consent in writing
Under unsupervised administration, the Personal Representative can collect assets, pay debts, manage property, and make distributions without prior court approval for most actions. The estate is closed by filing a Closing Certificate (§ 862.01) — no closing hearing is required.
Supervised administration is required or appropriate when:
- The will does not authorize unsupervised administration and a party will not consent
- An heir contests the will or disputes the distribution
- A creditor disputes a claim or the estate is insolvent
- A minor or incapacitated beneficiary's interests require court protection
- Court oversight is needed to resolve disputes between interested parties
Wisconsin Marital Property — Critical First Step
Wisconsin adopted the Uniform Marital Property Act. Before filing anything, determine how property is classified:
- Marital property: Property acquired during marriage — each spouse owns an undivided one-half interest. Only the deceased's half is subject to probate. The surviving spouse's half passes outside probate.
- Individual property: Property acquired before marriage, or by gift or inheritance during marriage — the entire amount is potentially subject to probate if in the deceased's name alone.
- Survivorship marital property: Marital property designated as survivorship passes entirely to the surviving spouse outside probate (similar to joint tenancy).
Correctly identifying marital vs. individual property can significantly reduce the size of the probate estate and may even allow the estate to qualify for the Transfer by Affidavit.
Phase-by-Phase: Wisconsin Probate
Phase 1: Filing (Month 1)
- Complete the Petition for Probate of Will (or Petition for Administration if no will) — forms at wicourts.gov
- Classify estate assets as marital, individual, or survivorship marital property before filing
- File the petition and the original will with the Circuit Court in the county of domicile
- Pay the filing fee ($100–$250 depending on county)
- Indicate whether you will seek unsupervised administration (§ 856.23)
- Receive a scheduled court hearing date — typically 2–4 weeks out
Phase 2: Opening Hearing and Appointment (Month 1)
- Attend the Circuit Court hearing before the assigned judge
- Present the original will and required documents
- Receive the Order Admitting Will to Probate and Order Appointing Personal Representative
- File the Personal Representative's oath and acceptance
- Obtain certified copies of Letters Testamentary — order 10–12; each institution requires its own original
- If unsupervised administration is authorized, receive the Order granting it at this hearing
Phase 3: Notice (Promptly after appointment)
- Publish Notice to Creditors in a newspaper of general circulation in the county for three consecutive weeks
- First publication date starts the 3-month creditor claim period (§ 859.01) — publish the week you receive Letters
- Send written notice directly to all known creditors
- Mail written notice to all heirs and beneficiaries via certified mail with return receipt
Phase 4: Inventory (Within 3 Months of Appointment)
- Apply for the estate's EIN at irs.gov/ein; open an estate bank account using the EIN and Letters Testamentary
- Prepare the Inventory listing all probate assets with date-of-death fair market values
- Classify each asset as marital, individual, or survivorship marital — only the deceased's share of marital property is inventoried
- Obtain real estate appraisals from a licensed Wisconsin appraiser
- File the Inventory with the Circuit Court within 3 months of appointment
Phase 5: Claims and Taxes (Months 2–5)
- Wait for the 3-month creditor period to expire from the date of first publication (§ 859.01)
- Review all creditor claims; disallow invalid claims in writing within the required period
- Pay valid claims in priority order: administration expenses → funeral costs → federal tax debts → medical expenses → other debts
- File the deceased's final Wisconsin Form 1 (due April 15) and federal Form 1040
- File Wisconsin Form 2 (fiduciary income) if the estate earns income during administration
- No Wisconsin estate tax — no Wisconsin Form 706 equivalent; no Wisconsin inheritance tax
Phase 6: Distribution (After All Debts Paid)
- Distribute cash, securities, and personal property per the will or Wisconsin intestacy law (§ 852.01 et seq.)
- Prepare and record a Personal Representative's Deed for each real property at the county register of deeds
- Obtain signed receipts and releases from each beneficiary
- Document all distributions in the Final Account or Closing Certificate
Phase 7: Closing (Month 4+)
- Under unsupervised administration: File a Closing Certificate (§ 862.01) with the Circuit Court — certifying that all debts are paid, taxes filed, and assets distributed. No hearing required. The estate closes when the certificate is filed.
- Under supervised administration: Prepare a Final Account listing all income, expenses, and distributions. File the Petition for Final Account and Order of Distribution. Attend the closing hearing. Receive the Order of Distribution.
- Close the estate bank account after closing
- Retain all estate records for at least 3 years
Wisconsin Income Tax: What the Estate Owes
Wisconsin has a progressive income tax (top rate 7.65%) — but no estate tax and no inheritance tax.
- Form 1 — deceased's final Wisconsin individual income tax return; due April 15 of the following year; covers Jan. 1 through date of death
- Form 2 — Wisconsin Fiduciary Income Tax Return; required if the estate earns income during administration (interest, rent, capital gains, dividends)
- No Wisconsin estate tax — Wisconsin eliminated its estate tax; no state Form 706 equivalent required
- No Wisconsin inheritance tax — all beneficiaries receive their share free of Wisconsin inheritance tax regardless of relationship
- Federal returns still required — federal Form 1040 (final) and federal Form 1041 (if estate income exceeds $600)
Wisconsin's 7.65% top income tax rate is significant for estates with substantial income. If the estate holds income-producing assets — rental property, business interests, substantial investment accounts — the estate fiduciary income tax (Form 2) can be material. Consider distributing income to beneficiaries where possible to shift the income tax to their individual returns, which may be taxed at lower rates.