✓ Verified September 2026
To contest a will in Wisconsin, you file in the probate court within a fixed window and prove one of a short list of legal grounds. This guide gives the Wisconsin answer in plain English, and it starts with the deadline, because that is the fact that ends more cases than any other. All facts are from Wisconsin law, verified as of September 2026.
In This Wisconsin Guide:
Contest a Will in Wisconsin: At a Glance
Here are the Wisconsin facts that decide whether you can contest a will in Wisconsin:
| Deadline to contest | Wisconsin has NO fixed post-admission will-contest statute of limitations (no “3 months” or “2 years” period). The operative deadline is the hearing date: an objection to probate of the will must be filed on or before the hearing on the petition for administration that the court sets under Wis. Stat. § 856.11, and notice of that hearing must be mailed to interested persons at least 20 days before the hearing (Wis. Stat. § 879.05(2)), or personally served at least 10 days before the hearing (Wis. Stat. § 879.05(2)). In informal administration, an interested person may file a written demand for formal proceedings at any time while the estate remains open, which suspends informal administration as to the issues raised (Wis. Stat. § 865.03). Once the will has been admitted and judgment or order entered, the only remaining route is a motion for relief from the judgment or order under Wis. Stat. § 879.31, which incorporates Wis. Stat. § 806.07 — the motion must be made within a reasonable time, and not more than 1 year (365 days) after the judgment or order was entered when based on mistake/inadvertence/surprise/excusable neglect (§ 806.07(1)(a)) or fraud, misrepresentation, or other misconduct of an adverse party (§ 806.07(1)(c)) (Wis. Stat. § 806.07(2)). |
| What starts the clock | The clock is triggered by the notice of hearing on the petition for administration (Wis. Stat. §§ 856.11, 879.03, 879.05) — mailed at least 20 days before the hearing — and the objection must be raised at or before that hearing, i.e., before the will is admitted to probate. Wisconsin standing is also cut off by admission itself: under Wis. Stat. § 851.21(1)(a), an heir who is not a beneficiary under the will ceases to be a “person interested” upon admission of the will to probate or entry of a statement of informal administration. After admission, the 1-year outer limit under Wis. Stat. § 806.07(2) runs from entry of the judgment or order, not from death. |
| Who can contest | Only a “person interested” as defined in Wis. Stat. § 851.21 may object. That includes: an heir of the decedent; a beneficiary named in any document offered for probate as the will; a beneficiary of a trust created under any document offered for probate as the will; and a person named as personal representative in any document offered for probate as the will. The court may order that additional persons be included as interested persons. Beneficiaries under a prior will have standing because that prior document may be offered for probate. Creditors are not “persons interested” for purposes of contesting the validity of the will; creditors proceed by claim under Wis. Stat. ch. 859. Note the cutoff in § 851.21(1)(a): an heir who is not a beneficiary loses interested-person status once the will is admitted to probate or a statement of informal administration is entered. |
| No-contest clause | YES with a probable-cause exception. Wis. Stat. § 854.19 provides that a provision in a governing instrument prescribing a penalty against an interested person for contesting the instrument or instituting other proceedings relating to it “may not be enforced if the court determines that the interested person had probable cause for instituting the proceedings.” The statute applies to wills and to trusts and other governing instruments under Wis. Stat. ch. 854. |
| What the filing is called | An “Objection to Admission of Will” (also called a will contest objection or petition objecting to probate), filed by verified petition in the circuit court branch handling probate in the county where the estate is pending. All applications to the court in probate matters must be made by verified petition showing the jurisdiction of the court and the interest of the petitioner (Wis. Stat. § 879.03). Notice of hearing is given on Wisconsin circuit court form PR-101 (Notice of Hearing — Probate), which lists “Objection to Admission of Will” as a hearing type. In an informal administration under Wis. Stat. ch. 865, the equivalent filing is a written Demand for Formal Proceedings served on the personal representative and filed with the court (Wis. Stat. § 865.03). |
| Court | The Wisconsin Circuit Court for the county where the estate is being administered, exercising probate jurisdiction (Wis. Stat. chs. 851–882). Filings are made through the county Register in Probate. Wisconsin has no separate surrogate’s court; probate is a branch of the circuit court. |
| Jury trial | NO — there is no right to a jury trial in a Wisconsin will contest. The annotation to Wis. Stat. § 879.45 states that neither the constitution, statutes, nor common law affords the right to trial by jury in a will contest, citing Estate of Elvers, 48 Wis. 2d 17, 179 N.W.2d 881 (1970); see also In re Estate of Sharpley, 2002 WI App 201, 257 Wis. 2d 152, 653 N.W.2d 124. Wis. Stat. § 879.45(1) allows jury trials in probate in cases where a jury trial could be had of similar issues under Wis. Stat. § 805.01(1), and § 879.45(2) permits a person with the right of appeal to file a written demand for a jury trial within 10 days after notice that the matter is to be contested — but in a will contest any jury is discretionary/advisory rather than a matter of right. |
| Typical cost | UNVERIFIED — no Wisconsin court, legislature, or state agency publishes a typical cost range for a contested will case. Wisconsin does publish the probate filing fee structure under Wis. Stat. § 814.66, and Wis. Stat. § 879.45(3) provides that in jury cases costs are allowed as a matter of course to the prevailing party. Actual attorney fees for a contested case vary widely by county, estate size, and length of litigation; check with your county Register in Probate or a licensed Wisconsin attorney for current figures. |
The Deadline to Contest a Will in Wisconsin
The window is short in some states and long in others, and it is measured from a specific event rather than from the day you learned about the will. That is why the first thing to find out is the date the will was admitted and whether you received formal notice. If the deadline has not run, everything else on this page is available to you.
If it has, the remaining options are narrow and usually involve proving you never got the notice the law required.
Grounds to Contest a Will in Wisconsin
Lack of testamentary capacity — testator must be 18 or older and of sound mind (Wis. Stat. § 853.01); improper execution / failure to meet formalities — signed by testator and signed by 2 witnesses within a reasonable time (Wis. Stat. § 853.03); undue influence (common law, four-element and two-element tests); fraud; duress; forgery (Wis.
Stat. § 856.16 expressly preserves fraud and forgery challenges even to a self-proved will); insane delusion; mistake in execution or inducement; and revocation of the will by later will, codicil, or physical act (Wis. Stat. § 853.11). Wisconsin also permits a harmless-error/clear-and-convincing cure of execution defects under Wis. Stat. § 853.03 and related provisions, which can defeat a formalities-based challenge.
Who has to prove what: The proponent has the initial burden of proving due execution, but a self-proved will shifts this: under Wis. Stat. § 856.16, if the will includes an affidavit substantially in the form of Wis. Stat. § 853.04(1) or (2), the will is conclusively presumed to have been executed in compliance with Wis.
Stat. § 853.03 absent proof of fraud or forgery in connection with the affidavit, and the other execution requirements are rebuttably presumed. The contestant carries the burden on the substantive grounds. For undue influence, the contestant must prove the claim by clear, satisfactory, and convincing evidence; the risk of non-persuasion never shifts.
Wisconsin recognizes two alternative tests: (1) the four-element test — susceptibility to undue influence, opportunity to influence, disposition to influence, and coveted result (where three elements are clearly established, a lesser quantum of proof suffices for the fourth); and (2) the two-element test — a confidential or fiduciary relationship between the testator and the favored beneficiary, plus suspicious circumstances surrounding the execution of the will,
which raises an inference or presumption of undue influence that the proponent must then rebut.
Lack of testamentary capacity and fraud are likewise proved by clear, satisfactory, and convincing evidence.
Who Can Contest a Will in Wisconsin
Only a “person interested” as defined in Wis. Stat. § 851.21 may object. That includes: an heir of the decedent; a beneficiary named in any document offered for probate as the will; a beneficiary of a trust created under any document offered for probate as the will; and a person named as personal representative in any document offered for probate as the will.
The court may order that additional persons be included as interested persons. Beneficiaries under a prior will have standing because that prior document may be offered for probate. Creditors are not “persons interested” for purposes of contesting the validity of the will; creditors proceed by claim under Wis. Stat. ch. 859.
Note the cutoff in § 851.21(1)(a): an heir who is not a beneficiary loses interested-person status once the will is admitted to probate or a statement of informal administration is entered. Being unhappy with the will is not standing; losing something because of it is. Check the earlier will and the intestate rules for Wisconsin before filing, because they decide whether you are an interested person.
No-Contest Clauses in Wisconsin
YES with a probable-cause exception. Wis. Stat. § 854.19 provides that a provision in a governing instrument prescribing a penalty against an interested person for contesting the instrument or instituting other proceedings relating to it “may not be enforced if the court determines that the interested person had probable cause for instituting the proceedings.” The statute applies to wills and to trusts and other governing instruments under Wis. Stat. ch.
854.
The Steps to Contest a Will in Wisconsin
Step one is the deadline check above. Step two is evidence: the medical records around the signing date, the names of the witnesses, the drafting lawyer’s file, and the financial records that show who benefited.
Step three is the filing — An “Objection to Admission of Will” (also called a will contest objection or petition objecting to probate), filed by verified petition in the circuit court branch handling probate in the county where the estate is pending. All applications to the court in probate matters must be made by verified petition showing the jurisdiction of the court and the interest of the petitioner (Wis.
Stat. § 879.03). Notice of hearing is given on Wisconsin circuit court form PR-101 (Notice of Hearing — Probate), which lists “Objection to Admission of Will” as a hearing type. In an informal administration under Wis. Stat. ch. 865, the equivalent filing is a written Demand for Formal Proceedings served on the personal representative and filed with the court (Wis. Stat. § 865.03)..
Step four is discovery and, in most cases, a settlement conference; the small minority that reach trial are decided by the judge.
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Settling Instead of Fighting
YES. Wisconsin expressly authorizes compromise of probate disputes: Wis. Stat. § 879.59 governs compromises in probate matters, including court approval where parties are subject to guardianship (§ 879.59(3)) and appointment of a representative for unknown persons or future contingent interests that may be affected by a compromise (§ 879.59(4)). Wisconsin also authorizes court-ordered alternative dispute resolution in civil actions under Wis.
Stat. § 802.12, under which the judge may order the parties to attempt settlement through mediation, nonbinding arbitration, early neutral evaluation, moderated settlement conference, mini-trial, focus group, or summary jury trial; mediation communications are protected under Wis. Stat. §§ 904.08 and 904.085. Nonjudicial settlement agreements for trusts are separately available under the Wisconsin Trust Code, Wis. Stat. § 701.0111.
Other Wisconsin rules: (1) NO ante-mortem/pre-death will validation — Wisconsin Ch. 853 contains no living-probate procedure, so a will can only be challenged after the testator’s death. (2) Self-proved will presumption is unusually strong: under Wis.
Stat. § 856.16, a will with a § 853.04 affidavit is CONCLUSIVELY presumed to have been executed in compliance with § 853.03 unless there is proof of fraud or forgery in connection with the affidavit; other valid-execution requirements are rebuttably presumed. This effectively forecloses most pure formalities challenges. (3) Standing terminates on admission — Wis.
Stat. § 851.21(1)(a) strips “person interested” status from a non-beneficiary heir once the will is admitted to probate or a statement of informal administration is entered, which is why the objection must be raised before admission. (4) Dual-track probate — Wisconsin runs both informal administration through the probate registrar (Ch. 865) and formal administration before the circuit court; a written demand for formal proceedings under Wis.
Stat. § 865.03 suspends informal administration and the personal representative’s powers as to the matters raised, and the registrar may not admit a will informally where a demand for formal administration has been made. (5) Two alternative undue-influence tests (four-element and two-element confidential-relationship-plus-suspicious-circumstances), with the confidential-relationship route shifting the burden of rebuttal to the will’s proponent. (6) No right to a jury (Estate of Elvers), unlike many states.
(7) Wisconsin is a marital property state (Wis. Stat. ch. 766), so a surviving spouse’s deferred marital property elective share under Wis. Stat. § 861.02 is a separate remedy from a will contest and has its own deadline — a spouse may have rights even if a contest fails.
(8) Any person with custody of a will must file it with the court within 30 days after learning of the death (Wis. Stat. § 856.05), which is often what puts potential contestants on notice.
The Evidence That Wins or Loses a Will Contest
Capacity cases turn on the weeks around the signing: the medical chart, prescriptions, a dementia diagnosis, and what the drafting lawyer and the witnesses saw that day. A will signed in a lawyer’s office with two disinterested witnesses and a self-proving affidavit is hard to attack; a will signed at a kitchen table with the main beneficiary present is not.
Undue influence cases turn on the relationship — who drove the parent to the appointment, who chose the lawyer, who was in the room, and whether the new will departed sharply from earlier ones and from what the parent said to other people.
Improper execution is the narrowest ground and the cleanest: Wisconsin sets exact witness and signature rules, and a will that misses them fails regardless of what the signer intended. Before you contest a will in Wisconsin, gather the prior wills, the medical releases, and the names of everyone at the signing.
Most of that evidence has to be requested formally once the case is filed, and the deadline does not wait for it.
What to Expect When You Contest a Will in Wisconsin
A will contest is a lawsuit about the document, not about fairness. When you contest a will in Wisconsin, the court asks whether the person who signed it had capacity, signed it freely, and signed it correctly. It does not ask whether the split was reasonable. That is why the strongest cases rest on medical records and witness accounts from the weeks around the signing.
Most families who contest a will in Wisconsin settle. Courts encourage it, many states have family settlement rules that let the heirs agree to a different division, and a settlement avoids the cost and delay of trial. The deadline, the grounds, and the no-contest clause above are the three facts that set your bargaining position before any of that begins.
You don’t have to do this alone
If you are settling a loved one’s estate in Wisconsin, your state’s probate court self-help center and free legal-aid offices can walk you through the process at no cost. For an active probate or a deadline, talk to a licensed probate attorney in your state.
Key Takeaways: Contest a Will in Wisconsin
- The deadline is everything: the window to contest a will in Wisconsin closes on a fixed schedule, and the court cannot reopen it for a late but valid claim.
- Grounds are specific: you contest a will in Wisconsin on capacity, undue influence, fraud, duress, or bad execution, never on unfairness alone.
- Standing first: only an interested person can contest a will in Wisconsin; check whether you inherit under the prior will or the intestate rules.
- Read the no-contest clause: whether the state enforces it decides how much risk it takes to contest a will in Wisconsin.
- Evidence is medical and financial: records, witnesses to the signing, and the drafting lawyer’s file decide most cases when you contest a will in Wisconsin.
- Settlement is common: most families who contest a will in Wisconsin settle before trial, often through the state’s family settlement rules.
- Find the admission date: the day the will was admitted is the day the clock to contest a will in Wisconsin usually starts.
- Prior wills matter twice: they give you standing to contest a will in Wisconsin and show how far the last will departed from the pattern.
- Notice defects are a lifeline: if you never got the required notice, you may still contest a will in Wisconsin after the ordinary deadline.
- Self-proved wills are harder: a will with a notarized witness affidavit raises the bar to contest a will in Wisconsin on execution grounds.
- Cost scales with the estate: before you contest a will in Wisconsin, compare the likely fees to what you would actually gain.
- Mediation is usually offered: many courts require a settlement conference before anyone who chooses to contest a will in Wisconsin sees a judge.
Quick Answers: Contest a Will in Wisconsin
How long do you have to contest a will in Wisconsin?
A fixed period that starts on a specific event, usually the will’s admission to probate or the notice to heirs. It is short in some states and long in others, and missing it ends the case.
What does it cost to contest a will in Wisconsin?
Contested cases commonly run into five figures, and some lawyers take strong cases on contingency. Compare the cost to the amount you would gain if the will fails.
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Official Wisconsin Sources & Resources
- Wisconsin Probate Court: https://www.wicourts.gov/services/public/selfhelp/probate.htm (Wisconsin Court System Self-Help Law Center — Probate); probate forms at https://www.wicourts.gov/forms1/circuit/ccform.jsp?Category=26 and the informal administration guide at https://www.wicourts.gov/services/public/selfhelp/docs/probateguide.pdf
- Wisconsin Will Contest Statute: https://docs.legis.wisconsin.gov/statutes/statutes/856 (Ch. 856, Opening Estates — including § 856.11 notice of hearing and § 856.16 self-proved will); see also https://docs.legis.wisconsin.gov/statutes/statutes/879 (Ch. 879, Probate — notice, appearance, appeal and miscellaneous procedure, including §§ 879.03, 879.05, 879.31, 879.45, 879.59), https://docs.legis.wisconsin.gov/document/statutes/854.19 (no-contest/penalty clause), https://docs.legis.wisconsin.gov/statutes/statutes/851/i/21 (person interested), and https://docs.legis.wisconsin.gov/statutes/statutes/853 (Ch. 853, Wills)
- Internal Revenue Service — Estate Tax: irs.gov
- Cornell Legal Information Institute: law.cornell.edu/wex
This Wisconsin guide was last verified against official sources in September 2026. Laws change — verify with your state court or a licensed attorney.
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Disclaimer: This guide is informational only and is not legal or tax advice. Estate, probate, and tax laws change and vary by state and county. Verify current rules and dollar figures with your state’s court, statute, or a licensed attorney or tax professional before acting. For urgent matters like an active probate or a tax deadline, consult a licensed professional in your state right away.