Most Illinois probate cases take six to eighteen months to close, and the main reason the floor sits that high is a mandatory six-month creditor notice period that no estate can skip. Simple estates that hit every deadline on schedule often wrap in nine to twelve months. Contested wills, real estate sales, and estate tax filings routinely push cases past two years. How long probate takes in Illinois depends less on the size of the estate than on whether anyone fights, whether property has to be sold, and whether a federal estate tax return is involved.
The Six-Month Creditor Window Sets the Floor
Once the court appoints a personal representative, that person must publish a notice to creditors in a local newspaper once a week for three consecutive weeks and mail direct notice to every known creditor.1Illinois General Assembly. Illinois Compiled Statutes 755 ILCS 5/18-3 – Notice – Publication That triggers a claims window of at least six months from the first publication, or three months from the mailing date, whichever is later. The court will not approve a final distribution until the window closes, no matter how simple the estate looks.
A creditor who misses the deadline is permanently barred from collecting.2FindLaw. Illinois Code 755 ILCS 5/18-12 – Limitations on Payment of Claims Even if no probate case is ever opened, all potential claims expire two years after the date of death.
Deadlines That Pace the First Year
Several statutory deadlines create the natural rhythm of a probate case. Hit them on time and the case moves; miss one and weeks or months get added.
- Anyone holding the original will must file it with the circuit court clerk immediately after learning of the death. Deliberately hiding a will for 30 days or more is a felony-level offense.3Illinois General Assembly. Illinois Compiled Statutes 755 ILCS 5/6-1 – Deposit of Will
- A person named as executor has 30 days after learning of the appointment to either petition to open probate or formally decline. Missing this can cost them the right to serve.4Illinois General Assembly. Illinois Compiled Statutes 755 ILCS 5/6-3 – Duty of Executor
- The representative must file a verified inventory of all known real and personal property within 60 days of receiving letters of office. Assets discovered later require a supplemental inventory within another 60 days.5FindLaw. Illinois Code 755 ILCS 5/14-1 – Inventory
- Unless all interested parties waive it in writing, the representative must present a verified financial accounting to the court within 60 days after the first anniversary of receiving letters.6Illinois General Assembly. Illinois Compiled Statutes 755 ILCS 5/24-1 – Duty to Account
Stack these alongside the six-month creditor window and a clean estate can realistically close somewhere between nine and twelve months after filing.
Independent vs. Supervised Administration
Illinois runs probate on two tracks, and which one you end up on has a major effect on how long everything takes.
Independent administration lets the representative handle most tasks without asking the court first. Selling property, paying bills, and distributing assets can all happen without a formal court order.7Illinois General Assembly. Illinois Compiled Statutes 755 ILCS 5/28-1 – Independent Administration The court grants this track by default unless the will prohibits it or an interested party objects.8FindLaw. Illinois Code 755 ILCS 5/28-2 – Grant of Independent or Supervised Administration Most Illinois cases proceed this way.
Supervised administration is the opposite. The court must review and approve virtually every significant action, from selling a car to paying the attorney. Everything moves at the pace of the court’s calendar, and backed-up dockets turn routine approvals into weeks of waiting. Supervised administration can easily double the length of an otherwise simple estate.
If an interested party objects to independent administration, the court must switch to supervised, unless the will specifically directs independent administration, in which case the court only overrides it for good cause.8FindLaw. Illinois Code 755 ILCS 5/28-2 – Grant of Independent or Supervised Administration A will that explicitly directs independent administration gives the executor meaningful protection against that kind of challenge.
What Pushes Probate Past a Year
Real estate is the most common reason cases run long. If the estate owns property that has to be sold, the representative lists it, negotiates offers, and closes the sale while probate waits. A slow market, repair work, or disagreements among heirs about pricing all add months.
Surety bonds can slow things down right at the start. Illinois generally requires the representative to post a bond protecting creditors and heirs from mismanagement. A corporate surety bond must equal at least 1.5 times the value of the personal estate; if individuals act as sureties, the amount doubles.9Justia Law. Illinois Code 755 ILCS 5 Article XII – Bonds, Oaths, Acceptance of Office Underwriting takes time. Many wills waive the requirement, which eliminates the delay entirely.
Litigation is where timelines really blow up. Will contests alleging fraud or undue influence involve discovery, depositions, and potentially a full trial. Disputes over who qualifies as an heir require separate evidentiary hearings. Illinois circuit courts have crowded dockets, so months can pass between hearing dates. A contested estate can easily take two to four years to resolve.
Less dramatic but still frustrating: missing or uncooperative heirs. If someone can’t be located, the representative may need to publish additional notices or ask the court for guidance. A beneficiary living abroad can turn routine signatures into weeks of back-and-forth.
Estate Tax Filings Can Add Six Months to a Year
Tax filings are an underappreciated source of delay for larger estates. Illinois is one of a handful of states with its own estate tax, and the exemption is far below the federal threshold.
The Illinois estate tax exemption is $4 million.10Illinois Attorney General. Important Notice Regarding Illinois Estate Tax An estate worth $4.5 million owes Illinois estate tax even though it is nowhere near the federal filing threshold. Rates are graduated, starting below 1% and climbing to 16% on larger taxable amounts. Any estate close to the $4 million line needs careful valuation work, and appraisals take time.
The federal estate tax exemption for 2026 is $15 million.11Internal Revenue Service. Estate Tax Estates above that must file Form 706 with the IRS.12Internal Revenue Service. Frequently Asked Questions on Estate Taxes Here is where the delay really hits: the IRS will not even accept a request for an estate tax closing letter until at least nine months after Form 706 is filed, and processing after that takes additional weeks with no guaranteed timeline.13Internal Revenue Service. Frequently Asked Questions on the Estate Tax Closing Letter Without the closing letter, the representative risks personal liability for distributing funds that might be owed to the IRS. Six months to a year on top of the normal timeline is realistic for estates caught in this process.
The Fast Path: Small Estate Affidavit
Not every Illinois estate has to go through probate at all. If the deceased person’s personal property totals $150,000 or less, excluding vehicles registered with the Illinois Secretary of State, the estate may qualify for a small estate affidavit instead.14Illinois General Assembly. Illinois Compiled Statutes 755 ILCS 5/25-1 – Small Estate Affidavit The threshold was raised from $100,000 effective August 2025.
The affidavit only works when no letters of office have been issued and none are being sought. It covers personal property, not real estate. The $150,000 cap counts only probate assets: property owned solely in the deceased person’s name without beneficiary designations or joint ownership. Life insurance payouts, retirement accounts with named beneficiaries, trust property, and jointly held assets do not count toward it.
Vehicles get special treatment. The affidavit can transfer vehicle titles through the Secretary of State regardless of the value of the rest of the estate.14Illinois General Assembly. Illinois Compiled Statutes 755 ILCS 5/25-1 – Small Estate Affidavit Instead of six to eighteen months, the affidavit process can wrap up in weeks. No court hearing, no published creditor notice, no formal administration.
Assets That Skip Probate Entirely
Even estates that do go through full probate often have significant assets that pass outside the process. The more assets in this category, the shorter the probate case, because there is simply less for the representative to administer.
- Life insurance proceeds, retirement accounts, and payable-on-death bank accounts transfer directly to the named beneficiary with no court involvement.
- Property held with rights of survivorship passes automatically to the surviving owner.
- Assets in a revocable living trust are distributed by the trustee under the trust terms, outside probate.
- Illinois allows a Transfer on Death Instrument that passes real estate directly to a named beneficiary at death.
A well-planned estate that leans on these tools can leave very little for the probate court to touch. When the only probate assets are a bank account and some personal belongings, the representative’s job shrinks and so does the timeline.