Can an Illinois Will Be Contested After Someone Dies?

 Posted on October 05, 2026 in Estate Planning / Probate

An Illinois will can be contested after death. The deadline runs six months from the date the will is admitted to probate, not from the date of death, and missing it ends the challenge regardless of how strong the underlying concerns are. Only certain people can bring a contest, and only for specific legal reasons. Disagreeing with how someone divided their estate is not enough on its own.

If you have questions about a will that was just admitted, a Kane County probate lawyer can tell you quickly whether you have grounds in 2026.

Who Can Contest a Will in Illinois?

Only an interested person can contest a will in Illinois. An interested person is someone with a financial interest, property right, or fiduciary role that the proceeding could affect. A fiduciary is someone legally responsible for managing property or acting on behalf of another person or the estate. In a will contest, that can include heirs, beneficiaries named in an earlier will, creditors, and others whose financial rights could change depending on whether the will is valid.

A friend who was promised something verbally or a caregiver who simply feels overlooked generally cannot bring a contest unless they have a financial or property interest that would be affected by the outcome. The person must first show that they have the right to challenge the will before the court considers whether the will is valid.

What Are the Legal Grounds for Contesting a Will in Illinois?

A will contest requires a recognized legal reason. Illinois courts hear claims based on:

• Lack of testamentary capacity, meaning the person did not understand what property they owned, who their close family members were, or how the will would distribute their property

• Undue influence, where someone pressured or manipulated the person into terms they would not otherwise have chosen

• Fraud, such as misrepresenting what the document said or who was in it

• Forgery, where the signature is not genuine

• Improper execution, when the will was not signed and witnessed the way Illinois requires

• Revocation, where the will was canceled, replaced by a later will, or destroyed before death

Unfairness does not qualify. A parent can leave one child everything and another child nothing, and a court will not disturb that simply because it seems harsh.

How Long Do You Have to Contest a Will in Illinois?

Under 755 ILCS 5/8-1, an interested person may file a petition contesting the validity of a will within six months after the will is admitted to probate, which is the court process for recognizing the will and handling the estate. The timeline starts when the court admits the will, which can be weeks or months after the death.

Heirs and people named in the will must receive notice after the will is admitted to probate. The notice explains their right to challenge the will and the deadline for doing so.

What Happens After Someone Contests a Will in Illinois?

If a court finds that a will is invalid, the estate does not automatically go to the person who challenged it. Instead, the court looks at whether an earlier valid will applies.

If there is an earlier valid will, the estate will usually be distributed according to that earlier will instead. If there is no valid earlier will, Illinois intestacy law decides who inherits, usually based on the deceased person’s surviving spouse and descendants.

Sometimes only one part of a will is invalid. For example, a court can remove a gift caused by undue influence while leaving the rest of the will in place if doing so does not change the person’s overall plan for the estate.

There is also a possible risk for beneficiaries who challenge a will. Some wills contain a no-contest clause stating that a beneficiary can lose their inheritance if they contest the will. Illinois courts interpret these clauses narrowly, so whether one applies depends on its exact wording and the type of challenge filed.

Schedule a Free Consultation With Our Geneva, IL Estate Planning Attorney

As an attorney with more than 25 years of legal experience, Deanna Aguinaga Walker enjoys the flexibility that having her own law practice gives her. She becomes personally involved with each of her clients and appreciates the opportunity to assist them across a wide range of legal matters. In a will contest, where the deadline is short and the family dynamics are already strained, that kind of direct attention matters.

Contact DLAW, PC at 331-222-7978 to talk to our Kane County probate lawyer today.