Michigan No-Fault PIP Deadlines: The One-Year-Back Rule (2026)
Michigan no-fault contains two different deadlines that injured drivers and passengers regularly confuse. The one-year notice rule under MCL 500.3145 determines when a claim must be filed; the one-year-back rule inside the same section determines how far back into the past an injured person can recover Personal Injury Protection (PIP) benefits once the claim is on file. Missing either clock means uncompensated medical bills, lost wages, and replacement-service expenses the carrier will never have to pay. This guide explains how both clocks work in 2026, how the Michigan Supreme Court has shaped them, and what the post-2019 reform amendments changed.
The Statutory Architecture: MCL 500.3145
MCL 500.3145 is the section every Michigan claimant needs to read carefully. It contains two distinct rules:
- The one-year notice rule. A written notice of injury must be given to the insurer within one year after the accident, or the claimant must commence the action within one year. The notice requirement is satisfied if it states the name and address of the injured person and indicates in ordinary language the time, place, and nature of the injury.
- The one-year-back rule. Even when the action is timely filed, the claimant may not recover benefits for any portion of the loss incurred more than one year before the date the action was commenced.
What “One Year Back” Actually Means
If a Michigan injury victim sues on June 1, 2026 for PIP benefits, the carrier owes only what was incurred from June 1, 2025 forward. Bills, wage-loss installments, and replacement-service expenses incurred before June 1, 2025 fall outside the recoverable window. The rule is not about whether the injury happened more than a year ago; it is about when the loss was incurred relative to the date the suit was filed.
The practical consequence: delay costs money. Every day a claimant waits to file is a day of older bills that drops off the recoverable end of the window.
The 2019 Reform Amendments and the Andary Question
The 2019 no-fault reform package amended MCL 500.3145 effective June 11, 2019. Among other changes, the reform tightened the tolling provisions and clarified that the one-year-back rule operates regardless of whether the carrier denied or paid benefits. The Michigan Supreme Court has since revisited the surrounding statutes in Andary v USAA Casualty Ins Co, 512 Mich 207 (2023), which held the reform’s medical-fee schedule and family-attendant-care cap do not apply retroactively to people injured in pre-reform accidents.
The Court has also weighed in on the related tolling architecture. Spine Specialists of Michigan, PC v MemberSelect Ins Co, 509 Mich 1062 (2022), and Encompass Healthcare PLLC v Citizens Ins Co, 344 Mich App 248 (2022), shaped how courts read MCL 500.3145(3)’s tolling language for healthcare provider claims. For individual claimants, the key takeaway is that partial payment by an insurer no longer tolls the one-year-back rule under the post-reform text. The clock keeps running.
Notice vs. Filing: Which Triggers What
| Action | Effect on the Notice Clock | Effect on the One-Year-Back Window |
|---|---|---|
| Insurer receives a timely written notice of injury | Stops the notice clock | Does not affect the one-year-back window |
| Insurer pays some PIP benefits | Treated as having notice | Does not toll the one-year-back rule under the post-reform text |
| Claimant files a lawsuit | Stops the notice clock | Sets the date from which “one year back” is measured |
| Insurer formally denies a claim | Triggers the right to sue | One-year-back window keeps running |
Tolling and Healthcare Provider Claims
Healthcare providers in Michigan have a direct cause of action against the no-fault carrier under Covenant Med Ctr Inc v State Farm Mut Auto Ins Co, 500 Mich 191 (2017), as later modified by 2019 PA 21, which authorized providers to sue in their own name when an assignment is in place. The one-year-back rule still applies, and the tolling provision under MCL 500.3145(3) provides that the period during which a written claim is pending before the carrier does not count against the one-year-back window. Tolling stops when the carrier formally denies the claim.
The interplay matters for unpaid medical bills. If a hospital or specialist is sitting on a claim for months waiting for the carrier to decide, the tolling provision is what keeps that bill from being lost to the one-year-back rule.
Common Mistakes That Cost Benefits
- Waiting for the bills to settle. Some claimants think they should wait for treatment to finish before filing. The opposite is true. The longer the wait, the more older bills are lost to the one-year-back rule.
- Treating partial payment as a tolling event. Pre-reform case law sometimes allowed it; post-reform text generally does not.
- Confusing the no-fault deadline with the tort deadline. The 3-year limitations period under MCL 600.5805 governs third-party auto-tort claims. PIP has its own one-year notice/one-year-back regime under MCL 500.3145.
- Sending a generic letter instead of a statutory notice. The statute requires name, address, time, place, and nature of injury. A vague “this is to put you on notice” letter may not satisfy the rule.
- Assuming an out-of-state insurer is exempt. MCL 500.3163 brings many out-of-state policies into the Michigan no-fault system. The notice still has to go to the right carrier on time.
Minors and the Special Tolling Rule
For minor claimants, MCL 500.3145(2) provides additional tolling. The one-year-back window is generally extended to allow the minor (or the minor’s representative) to bring a claim once an appropriate period has run. The interplay with MCL 600.5851 (general minority tolling) and the no-fault-specific provisions is fact-sensitive and turns on the date of accident and the date of majority.
Frequently Asked Questions
How long do I have to file a Michigan no-fault PIP claim?
Under MCL 500.3145, written notice of injury must be given to the insurer within one year of the accident, or the claimant must file suit within that year. Even after the notice clock is met, the one-year-back rule limits recoverable losses to those incurred within one year before the date suit is filed.
Does the insurer paying part of my bills give me more time?
Under the post-2019 reform text, partial payment is generally not treated as tolling the one-year-back window. The pre-reform Devillers-era rule that partial payment tolled the clock was modified by 2019 PA 21. The safe assumption is that the clock keeps running.
What is the difference between the notice rule and the one-year-back rule?
The notice rule controls when you must put the insurer on notice or file suit. The one-year-back rule controls how far back into time you can recover benefits once the claim is on file. They run on parallel tracks.
Does the 3-year auto-tort limitation period help me with PIP?
No. The 3-year limit under MCL 600.5805 governs third-party tort claims (pain and suffering, excess economic loss). PIP has its own one-year-notice and one-year-back regime under MCL 500.3145. Claimants regularly miss the PIP deadlines while watching the tort clock.
What if my insurer never formally denies the claim?
Under MCL 500.3145(3), the tolling provision protects the claimant during the period a written claim is pending. Once the carrier formally denies, tolling stops and the deadline runs against the claimant.
Are healthcare providers subject to the same one-year-back rule?
Yes. Providers who sue under an assignment from the injured person are bound by the same one-year-back limit. The pending-claim tolling under MCL 500.3145(3) is often the most important protection for unpaid hospital and rehab bills.
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