Michigan Probate Court Filing Deadlines by Case Type

If you've recently lost a loved one or been named as a personal representative, executor, or guardian in Michigan, you already know the weight of responsibility that comes with it. One missed deadline in probate court can delay the entire process, cost the estate money, or even expose you to personal liability. Knowing the specific filing deadlines for your case type isn't just helpful it protects you, the estate, and everyone involved.

What Does "Filing Deadlines by Case Type" Mean in Michigan Probate Court?

Michigan probate court handles several different types of cases, each with its own set of rules and timelines under the Michigan Estates and Protected Individuals Code (EPIC). A "filing deadline by case type" simply means the time limits you must follow depending on which kind of probate matter you're handling whether that's settling a deceased person's estate, managing a guardianship, or handling a conservatorship.

The deadlines aren't suggestions. They're enforceable rules set by Michigan statute. Missing them can result in court sanctions, removal from your role, or delays that affect beneficiaries who are waiting for their inheritance.

What Are the Different Types of Probate Cases in Michigan?

Michigan probate courts handle several distinct case categories. Each one comes with different filing requirements and timelines:

Informal decedent's estates handled by a probate register without a judge hearing
Formal decedent's estates require court hearings and judicial oversight
Supervised decedent's estates the court actively oversees every step
Small estates simplified process for estates under a certain value
Trust proceedings administration and disputes involving trusts
Guardianships court-appointed oversight of minors or incapacitated adults
Conservatorships management of another person's financial affairs
Mental health proceedings involuntary treatment or hospitalization orders
Name changes legal changes to a person's name

For a general overview of the filing process, see our guide on how to file probate court forms in Michigan step by step.

What Are the Key Filing Deadlines for a Decedent's Estate?

When someone passes away with assets in their sole name, their estate typically goes through probate. The personal representative (executor) must follow a strict timeline:

Petition filing: There is no fixed statutory deadline to open the estate, but delays can create legal exposure. Creditors may lose patience, and assets may be lost or diminished.
Notice to known creditors: Within 42 days of appointment, the personal representative must send written notice to all reasonably ascertainable creditors. This is required under MCL 700.3801.
Notice of appointment (publication): A notice to creditors must also be published in a newspaper. Known creditors then have 4 months from the date notice was sent (or 1 month from publication, whichever is later) to file claims.
Inventory filing: A complete inventory of estate assets must be filed within 91 days after the personal representative's appointment.
Final accounting and distribution: In informal proceedings, the personal representative must wait at least 5 months after receiving letters of authority before closing the estate, and must file a closing statement. In formal proceedings, the court sets the timeline.
Michigan estate tax return: If applicable, this is due 9 months after the date of death.

If you need a refresher on the petition forms themselves, our printable Michigan probate petition form may help.

What Happens If You're Handling a Small Estate?

Michigan offers a simplified process for qualifying estates. Under MCL 700.3982, if the estate's value (after subtracting liens and encumbrances) does not exceed what's needed to cover the homestead allowance, family allowance, exempt property, and reasonable costs, a petition for assignment can bypass much of the standard probate process.

For very small estates, a Michigan small estate affidavit may be used 28 days after the date of death. This allows a surviving spouse or heir to collect assets without opening a formal probate case at all, as long as the estate meets the statutory thresholds. You can learn more about those small estate affidavit filing requirements and timelines here.

How Long Does a Guardian or Conservator Have to File Reports?

Guardianships and conservatorships in Michigan don't end when the appointment is made they require ongoing court reporting:

Guardian's initial report: Must be filed within 56 days of appointment, describing the ward's condition and care plan.
Annual guardian report: Due every 12 months after the initial appointment, or as the court orders.
Conservator's inventory: Due within 56 days of appointment.
Conservator's annual account: Due every 12 months, detailing all financial transactions.
Final account: Must be filed within 56 days after the conservatorship ends (upon the ward's death, termination, or the conservator's resignation or removal).

Failure to file these reports on time can lead the court to remove the guardian or conservator and appoint someone else.

What About Trust Proceedings and Their Deadlines?

Trust administration in probate court involves its own set of timelines. While trusts are designed to avoid probate, disputes and formal proceedings still come before the probate judge. Key deadlines include:

Notice to beneficiaries and heirs: The trustee must send notice within 63 days of accepting the trust or learning of a revocable trust becoming irrevocable due to the settlor's death.
Accounting to beneficiaries: Trustees are required to provide annual accountings unless the trust document says otherwise.
Claims against the trust: Creditors generally have 4 months from the date they receive notice to file claims.

Do Mental Health and Name Change Cases Have Different Timelines?

Yes. Mental health proceedings move quickly because they involve involuntary treatment or hospitalization:

Initial hearing: Must be held within 7 days of a petition being filed for involuntary hospitalization.
Order of hospitalization duration: Varies based on the court's determination, with review hearings scheduled accordingly.

Name changes in probate court are generally straightforward. After filing the petition, a hearing is typically scheduled within 4 to 6 weeks, though this depends on the county's court calendar. If the court grants the petition, the order must be filed with the court clerk to become effective.

What Are Common Mistakes People Make with Michigan Probate Deadlines?

Missing or misinterpreting deadlines is the most frequent problem. Here are the mistakes that come up most often:

Confusing the 4-month creditor period with the estate closing timeline. The 5-month minimum before closing an informal estate is separate from the creditor claim window.
Forgetting to send written notice to known creditors. Publication alone is not enough. You must also send direct written notice.
Missing the 91-day inventory deadline. This is easy to overlook when you're grieving or dealing with complicated assets.
Not filing guardian or conservator annual reports. These are court-ordered obligations, not optional updates.
Waiting too long to open a probate estate. While Michigan doesn't set a hard deadline, delays can create problems with taxes, insurance, and property maintenance.
Using the wrong forms for the case type. This causes rejections and restarts the clock. Our article on common mistakes when filing Michigan probate court documents covers this in detail.

Where Can You Find the Official Michigan Court Deadlines?

The Michigan Legislature publishes the full text of EPIC online. You can review the specific statutes at the Michigan Legislature's website. Many county probate courts also publish local rules and filing checklists on their websites.

Keep in mind that some courts have local administrative orders that add requirements on top of the state statutes. Always check with the specific county probate court where the case is filed.

How Do Michigan's Deadlines Compare Across Case Types?

Here's a quick reference to help you see all major deadlines at a glance:

Decedent's estate creditor notice: 42 days after appointment
Decedent's estate inventory: 91 days after appointment
Decedent's estate earliest closing: 5 months after letters of authority issued (informal)
Small estate affidavit: 28 days after death
Guardian initial report: 56 days after appointment
Conservator inventory: 56 days after appointment
Trust notice to beneficiaries: 63 days after accepting trusteeship
Mental health hearing: 7 days after petition filed
Name change hearing: Typically 4 to 6 weeks after petition

Practical Checklist: Michigan Probate Filing Deadlines by Case Type

Identify your case type (decedent's estate, small estate, guardianship, conservatorship, trust, mental health, or name change)
Note the date of appointment, date of death, or date of petition this starts the clock
Calendar every applicable deadline immediately after the triggering event
Prepare and send written creditor notice within 42 days (for decedent's estates)
Publish notice to creditors in a local newspaper promptly after appointment
File the inventory within 91 days of appointment
Set reminders for annual reports if serving as guardian or conservator
Double-check local county probate court rules for any additional requirements
Do not close a decedent's estate before 5 months have passed from the date of appointment
When in doubt, contact the probate court clerk or consult a probate attorney before the deadline passes

Tip: Keep a physical or digital calendar dedicated solely to your probate matter. Set reminders for one week before each deadline, not on the deadline itself. This gives you time to prepare and correct anything that's missing rather than scrambling at the last minute and risking a late filing.