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Will Contest Deadline in Illinois

In Illinois, an interested person can file a petition to contest the validity of a will within 6 months after the will is admitted to probate.

Last checked . General information, not legal advice.

Illinois at a glance

Deadline to contest
6 months
Clock starts
Admission of the will to probate
Failure to mail a copy of the petition to an heir or legatee does not extend the deadline.

Sources

Last checked

The rules in Illinois

How long do you have to contest a will in Illinois?

Deadline to contest in Illinois: 6 months.

When does the deadline to contest a will start in Illinois?

Clock starts in Illinois: Admission of the will to probate. Failure to mail a copy of the petition to an heir or legatee does not extend the deadline.

Where do the Illinois will contest deadlines come from?

The rules above come from 755 ILCS 5/8-1. Each source is linked on this page. We last checked them in October 2026.

What this means in practice

Deadlines for will contests are often short and strictly applied. Knowing exactly which event starts the clock in the state where the will is probated, such as the date of admission, the date notice was mailed, or the date of publication, matters as much as knowing the length of the period.

Only people with a legal stake in the estate can usually contest a will, such as heirs who would inherit without the will or beneficiaries named in an earlier will. A contest also needs a recognized legal ground. Being disappointed with the amount left to you is generally not enough on its own.

A no-contest clause (also called an in terrorem clause) says a beneficiary who challenges the will loses their gift. Whether such a clause is enforced, and whether there is an exception for challenges brought with probable cause or in good faith, depends on state law. Anyone weighing a challenge, and anyone drafting a will, can check the state statute and may want to talk to a probate attorney.

General information, not legal advice. Laws change, and cities can add their own rules, so check the current statute before you rely on it.