Michigan Prejudgment Interest Rate
United States Michigan prejudgment interest — a formula rate, reset twice a year.
Set by statute Formula rate
Michigan prejudgment interest is currently 4.725% per year — a statutory formula rate under MCL 600.6013 that resets twice a year. Michigan has NO separate general prejudgment-interest statute; instead MCL 600.6013 (nominally the "interest on money judgments" statute) runs interest FROM THE DATE THE COMPLAINT IS FILED,…
When Michigan prejudgment interest applies
Michigan has NO separate general prejudgment-interest statute; instead MCL 600.6013 (nominally the "interest on money judgments" statute) runs interest FROM THE DATE THE COMPLAINT IS FILED, so the complaint-to-judgment portion functions as statutory prejudgment interest. It is available broadly and is NOT limited to liquidated/ascertainable claims — it applies to tort AND contract, and to unliquidated/tort damages (e.g., personal injury).
When it starts accruing
From the date the complaint is filed (for complaints filed on/after Jan 1, 1987) to the date of satisfaction of the judgment — MCL 600.6013(8). Exception for future damages: interest runs from filing only to the date of judgment (subsection (6)).
Simple or compound
Compound — compounded annually (MCL 600.6013(8); the written-instrument rate under (7) is also compounded annually).
How the rate is set
Variable, published by the Michigan State Treasurer. General/default rate = 1% + average 5-yr U.S. Treasury note auction yield for the preceding 6 months, re-certified each Jan 1 and Jul 1, compounded annually. Current (eff. 2026-01-01): 3.725% + 1% = 4.725%.
→ Compare with the Michigan post-judgment interest rate (interest after judgment)
Prejudgment interest under MCL 600.6013 — 4.725%, compounded annually. This is PREjudgment interest (accruing before entry of judgment) and is separate from Michigan’s post-judgment rate; availability is limited by claim type (see the page). Current formula value as of 2026-01-01; verify at legislature.mi.gov. Not legal advice.
Effective-date history
| Effective date | Rate | Basis |
|---|---|---|
| January 1, 2026 | 4.725% | Statute |
Source & provenance
Latest value retrieved July 10, 2026 (02:55 UTC) from the official source:
https://www.legislature.mi.gov/Laws/MCL?objectName=mcl-600-6013