Contesting a Will in Illinois: Grounds, Deadlines, and How Contested Estates Play Out

Contesting a will in Illinois is one of the few legal fights with a true countdown clock attached. Miss the six-month window and the strongest evidence in the world will not reopen the question. This guide gives you the deadline math, the standing test, the four grounds Illinois courts actually accept, and a realistic picture of how a contested estate moves through the DuPage County courthouse.

Calculate Your Deadline First, Everything Else Second

The contest clock does not start at death. It starts when the will is admitted to probate, and it runs for six months (755 ILCS 5/8-1). Do this today:

• Look up the estate case with the DuPage County Circuit Court Clerk and find the date of the order admitting the will.
• Add six months. That date is your outer limit, and courts do not extend it for negotiation, grief, or a busy schedule.
• If the will was DENIED admission and you want it admitted, a parallel six-month path exists to contest the denial (755 ILCS 5/8-2).

If you were never told the will entered probate, act the day you learn of it. Heirs and legatees are entitled to notice of the admission, which is one reason the notice step in probate administration matters so much.

Check Your Standing: Who Is Allowed to Contest

Illinois limits contests to an "interested person," meaning someone whose financial share changes depending on whether the will stands (755 ILCS 5/1-2.11). Run yourself through this test:

• Would you inherit under Illinois intestacy law if there were no will? Spouses and children usually clear this bar automatically. See who inherits when there is no will in Illinois for the intestacy order.
• Were you a beneficiary under an earlier will that the new will replaced? A larger share in a prior will is classic standing.
• Are you only morally offended? Neighbors, caregivers, and friends with no stake in either document have no standing, no matter how suspicious the facts.

The Four Grounds That Actually Work

Illinois courts do not weigh fairness. They ask whether the document is legally valid. Nearly every successful contest fits one of four grounds:

Two Illinois specifics most families do not know. First, a handwritten will with no witnesses (a holographic will) is simply invalid in Illinois, so "he wrote it himself and signed it" is often a complete ground by itself. Second, a gift to a witness can be forfeited if only two witnesses signed and one of them inherits (755 ILCS 5/4-6), which is a narrower attack than voiding the whole will but sometimes the right one.

Build Your Evidence File Before You File Anything

Contests are won on records assembled early. Whichever side you are on, start collecting now:

• The document trail: every prior will, codicil, and trust amendment. A pattern of consistent plans broken by one late outlier is powerful.
• The medical window: records from roughly two years before signing through death. Capacity is measured at the moment of signing, so the visit notes nearest that date matter most.
• The drafting file: who chose the lawyer, who drove the testator there, who was in the room. Request the drafting attorney's file through counsel.
• Money movement: bank statements showing gifts, new joint accounts, or authority granted to the suspected influencer while the testator was alive.
• Witnesses: names and contact information for everyone who saw the testator around the signing date, before memories fade.

How a Contest Moves Through the DuPage County Court

A will contest is filed in the estate's existing probate case, which for a DuPage decedent sits in the Probate Division of the 18th Judicial Circuit at the DuPage Judicial Center, 505 N. County Farm Road, Wheaton, via the Illinois e-filing system. The realistic sequence:

1. Petition filed within the six-month window, naming the grounds.
2. The estate freezes in practice. Distributions generally wait, though administration continues; the executor keeps collecting assets and paying claims while the contest runs. If you are the executor caught in the middle, our guide to the executor's duties and liability in Illinois covers your obligations while the fight proceeds.
3. Discovery: medical records, depositions of the drafting lawyer and witnesses, handwriting experts where forgery is claimed. This is the longest phase, commonly six months to a year.
4. Settlement pressure peaks once both sides have seen the evidence. Most contested estates resolve here, often by reallocating shares without a verdict.
5. Trial if no settlement. Either side may demand a jury in a will contest (755 ILCS 5/8-1).

If the contest succeeds, the estate passes under the most recent valid prior will, or by intestacy if none exists.

No-Contest Clauses, Costs, and Whether It Is Worth It

Three hard-headed questions to answer before filing:

• Is there a no-contest clause? Illinois courts generally enforce in terrorem clauses but read them narrowly. A losing contestant can forfeit what the will gave them, so a beneficiary with a meaningful share risks real money. Someone disinherited entirely risks nothing.
• Who pays the lawyers? The estate typically funds the executor's defense of the will, while the contestant funds their own case unless a settlement or statute shifts fees. Ask counsel for a written fee structure before filing rather than an estimate in the hallway.
• What is the estate actually worth? Discovery on a six-figure fight over a five-figure estate helps nobody. An honest valuation conversation on day one saves families from winning battles that cost more than the inheritance.

The cleanest way to avoid all of this is upstream: a properly executed, regularly updated will leaves little to attack. Our overview of will preparation with an Illinois estate planning attorney covers what a contest-resistant will looks like.

Sources: 755 ILCS 5/8-1 · 755 ILCS 5/8-2 · 755 ILCS 5/1-2.11 · 755 ILCS 5/4-3 · 755 ILCS 5/4-6 · Illinois Legal Aid Online: probate · DuPage County Circuit Clerk