Filing a Will in Illinois: What You Must Do Within 30 Days of Death

Most people know they need to locate the will after a family member dies. Far fewer know that Illinois law imposes a hard 30-day deadline to physically file that will with the county court—and that the person holding the will can face personal liability for failing to do so.

If you have just found the will, here is exactly what you need to do and why it matters.

The 30-Day Rule Under the Illinois Probate Act

Under 755 ILCS 5/5-1, any person who possesses the original Last Will and Testament of a deceased Illinois resident is legally required to file it with the circuit court clerk in the county where the decedent was domiciled (lived) within 30 days of learning that the testator has died.

This applies whether or not you intend to open a formal probate case. Lodging the will and opening a probate estate are two distinct actions. Lodging the will is a preservation step required by law. Opening a probate estate is a separate proceeding that may or may not be necessary depending on the estate's assets.

The filing fee for lodging a will is typically minimal—often $10 to $25 depending on the county. It does not obligate you to open full probate proceedings.

Why the Original Paper Document Must Be Filed

Here is the mistake that causes significant legal problems: people scan the will, attach the PDF to an electronic filing, and either mail or shred the original.

Illinois strictly prohibits this. Original wills are explicitly exempt from the Illinois Supreme Court's electronic filing mandate. The original paper document must be physically handed to the circuit court clerk. No exceptions.

Why this matters: if you destroy or lose the original after scanning it, probating the copy requires additional sworn affidavits from witnesses attesting that the scanned version accurately reflects the decedent's true intent. This creates an evidentiary vulnerability—any heir who disputes the will's contents now has grounds to challenge the copy's authenticity. Courts have seen family members contest wills solely because the original was never produced.

When you find the will, handle it carefully. Do not write on it. Do not remove staples or binding. The physical document in its original condition is what the court needs.

Where to File: Finding the Right County

The will must be filed in the county circuit court where the decedent was domiciled at the time of death—meaning their permanent legal residence, not a temporary address.

For Illinois's largest counties:

• Cook County: The Probate Division of the Circuit Court of Cook County, located at the Richard J. Daley Center, 50 W. Washington Street, Chicago.
• DuPage County: The DuPage County Judicial Center, 505 N. County Farm Road, Wheaton.
• Will County: The Will County Courthouse, 14 W. Jefferson Street, Joliet.
• Lake County: The Lake County Courthouse, 18 N. County Street, Waukegan.

For all other counties, contact the county circuit court clerk directly. The Illinois Supreme Court's website maintains a directory of all 102 county circuit courts.

If the decedent owned property in multiple Illinois counties but lived in one specific county, file in the county of legal domicile. The court where you file the will is also where any subsequent formal probate proceedings must take place.

What Happens When You File

Filing the will does not automatically open a probate estate. You are simply creating a court record that the will exists. The clerk will:

1. Accept the original document and date-stamp it
2. Assign a case number (even if no full probate estate is opened)
3. Retain the original in the court's files

The will is now a matter of public record. Any interested party—heirs, creditors, or potential beneficiaries—can inspect it.

If you later decide to open a formal probate estate (or an attorney determines it is required), the will is already on file and the attorney will reference the existing case number when petitioning for Letters of Office.

What If the Estate Does Not Need Formal Probate?

Many Illinois estates qualify for the Small Estate Affidavit procedure under 755 ILCS 5/25-1, which allows assets to be collected without court involvement when the personal property totals $150,000 or less (with vehicles excluded from the calculation as of August 2025).

Even if the estate qualifies for the Small Estate Affidavit—and no formal probate will be opened—the will must still be filed with the circuit court within 30 days of death. The obligation to lodge the will exists independently of whether a probate estate is opened.

What If You Miss the 30-Day Deadline?

Illinois does not specify a monetary penalty for late will filing in most circumstances, and courts generally accept wills filed after the 30-day window. However, holding a will beyond the deadline creates real practical and legal risks:

Personal liability for damages. If a beneficiary can show that your delay in filing the will caused them financial harm—for example, a creditor collected on a debt that would have been barred had probate opened sooner—you may face personal liability for that harm.

Will contest exposure. Delay can raise questions about whether the will was tampered with during the period it was withheld. An interested heir who stands to inherit more under intestate succession (if no valid will existed) has grounds to argue undue influence or document alteration.

Creditor complications. The six-month creditor claim window under 755 ILCS 5/18-3 does not start running until the estate is formally opened and the Notice to Creditors is published. Every month the will sits unfiled is a month the creditor clock is not running—meaning the executor cannot safely distribute assets to heirs sooner.

File the will promptly. Even if you are not ready to engage an attorney or open a full estate, physically lodging the document with the circuit court clerk is a straightforward, low-cost step that protects everyone.

Filing vs. Probating: A Common Misconception

One of the most common points of confusion among Illinois families is conflating two separate acts:

Filing (lodging) the will — A ministerial act required within 30 days of death. No attorney required. Minimal cost. Creates a public court record.

Probating (opening an estate) — A formal legal proceeding requiring an Illinois-licensed attorney (under the Mattson rule), a petition to the circuit court, a filing fee ($298 in DuPage County, $479 in Cook County), and appointment of the executor by a judge.

You must lodge the will even if you ultimately never open a formal probate estate. And when you do open probate, lodging the will is typically the first step before the attorney files the formal petition.

What to Bring When You File

When you take the original will to the circuit court clerk's office, bring:

• The original will — the actual paper document, unaltered
• A certified copy of the death certificate — the clerk may require this to create the record
• Your government-issued ID
• Payment for the filing fee — confirm the exact amount with the county clerk before you go; fees vary by county and are subject to periodic revision

You do not need an attorney for this step. It is one of the few estate administration tasks that Illinois law allows executors to complete pro se.

After Filing: Your Next Decision

Once the will is lodged, you face the central question of Illinois estate administration: does this estate require formal probate, or can it be settled using the Small Estate Affidavit?

That determination hinges on whether the decedent owned real property in their sole name (real estate always requires formal probate) and whether personal assets exceed the $150,000 affidavit threshold.

The Illinois Probate Process Guide walks through the exact decision tree, county-specific filing fee tables, and the full timeline from will filing through final distribution—including the forms required at each step and the deadlines that carry personal liability consequences for executors.

Get the complete guide at /us/illinois/probate/

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