Michigan sentencing guidelines are calculated by scoring the facts of the offense on a set of Offense Variables, scoring the defendant’s criminal history on a set of Prior Record Variables, and then finding the cell on the grid for that crime’s class where the two totals intersect. That cell shows a recommended range, in months, for the minimum portion of the sentence. Since the Michigan Supreme Court’s 2015 decision in People v. Lockridge, judges must calculate the range but are not bound by it.1Michigan Courts. Sentencing Before and After Lockridge
Why the Minimum Sentence Is What Gets Calculated
Michigan uses indeterminate sentencing for felonies. The judge sets a minimum term and a maximum term rather than one flat number. The maximum comes straight from the statute defining the offense and represents the longest a person can be held. The minimum is where judicial discretion lives, and it is the number the guidelines calculation produces.
Once the court-ordered minimum has been served, minus applicable credits, the Michigan Parole Board decides whether to release the person or keep them in until the maximum expires.2Michigan Legislature. Michigan Compiled Laws 791.234 So the guidelines calculation is not just an abstract number. It effectively sets the earliest possible parole date.
Scoring the Offense Variables
The first half of the calculation is the Offense Variable score. Each OV measures a specific dimension of what happened during the crime, and the court scores only the variables that apply to the offense category. Within each variable, the court chooses the highest applicable score based on which statutory description best fits the facts.
OV 1 scores the aggravated use of a weapon: firing a gun at a person is 25 points, pointing a firearm at a victim is 15 points, displaying or implying a weapon is 5 points, and no weapon involvement scores zero.3Michigan Legislature. Michigan Compiled Laws 777.31 OV 3 covers physical injury on a scale that runs from zero (no injury) up to 100 points when a victim was killed and homicide is not the sentencing offense. A life-threatening or permanently incapacitating injury scores 25 points, and a bodily injury requiring medical treatment scores 10.4Michigan Legislature. Michigan Compiled Laws 777.33 Other variables capture whether the offender exploited a vulnerable victim, whether there were multiple victims, and whether the defendant played a leadership role in a group offense.
The court determines OV scores based on the record using a preponderance-of-the-evidence standard.5Michigan Courts. Evidentiary Standard for Scoring the Guidelines Proof beyond a reasonable doubt is not required. Police reports, trial testimony, victim statements, and the presentence investigation report all feed the analysis. The points are added together to produce a total OV score, which places the defendant in an OV level on the grid.
Scoring the Prior Record Variables
The second half of the calculation looks at the defendant, not the crime. Seven Prior Record Variables assess the number and severity of prior felony convictions, misdemeanor convictions, and whether the person was on probation or parole when the new offense occurred.6Michigan Courts. Overview of Offense Variables Each variable has its own point scale, and the totals are combined into an overall PRV level.
Convictions from other states count as long as the offense would qualify as a felony or misdemeanor under Michigan law. A person with a clean record will score at or near zero on the PRV side. Someone with multiple prior felonies moves into a higher column on the grid. The OV total and the PRV total, taken together, are the numerical profile the judge uses at sentencing.
Reading the Sentencing Grid
Michigan maintains nine sentencing grids, one for each crime class: M2 (second-degree murder) and Classes A through H in descending order of severity.7Michigan Legislature. Michigan Compiled Laws 175-1927-XVII-6 – Sentencing Grids Every felony is assigned to one of these classes by statute. On each grid, the vertical axis represents OV level and the horizontal axis represents PRV level. The cell where the two intersect contains the recommended minimum sentence range, expressed in months.8Michigan Legislature. Michigan Compiled Laws 777.21
The Class A grid shows how wide the spread can be. At the lowest OV level (0 to 19 points) with zero prior record points, the cell reads 21 to 35 months. The harshest cell on that same grid, the highest OV level combined with 75 or more prior record points, reads 270 to 450 months or life.9Michigan Legislature. Michigan Compiled Laws 777.62 – Minimum Sentence Ranges for Class A Lower crime classes carry correspondingly narrower and shorter ranges. The grid does not set the maximum sentence. That still comes from the statute defining the offense. The grid sets the boundaries within which the judge is expected to pick the minimum.
When the Range Points Away From Prison
Not every calculation ends in a prison commitment. If the upper limit of the recommended minimum range is 18 months or less, the court must impose an intermediate sanction, meaning probation, community service, or a treatment program, unless the judge states reasonable grounds on the record for incarceration instead.10Michigan Legislature. Michigan Compiled Laws 769.34
A “straddle cell” sits between those two worlds: the upper limit of the range exceeds 18 months, but the lower limit is 12 months or less. In a straddle cell the judge chooses between a prison sentence with a minimum inside the range and an intermediate sanction with up to 12 months of jail time.10Michigan Legislature. Michigan Compiled Laws 769.34 That is why a few points on either the OV or the PRV side matter so much. They can be the difference between probation and a prison number.
Habitual Offender Enhancements to the Range
When the prosecution files a habitual offender notice, the guidelines calculation gets stretched at the top. MCL 777.21 sets the math for the upper limit of the recommended minimum range:
- Second felony: the upper limit increases by 25%.
- Third felony: the upper limit increases by 50%.
- Fourth or subsequent felony: the upper limit increases by 100%.
The bottom of the range does not move. Only the ceiling does.8Michigan Legislature. Michigan Compiled Laws 777.21
Habitual offender status also raises the statutory maximum. A second habitual offender faces up to 1.5 times the first-conviction maximum.11Michigan Legislature. Michigan Compiled Laws 769.10 A third habitual offender faces up to twice the first-conviction maximum.12Michigan Legislature. Michigan Compiled Laws 769.11 A fourth habitual offender whose current offense carries a first-conviction maximum of five years or more can be sentenced to life.13Michigan Legislature. Michigan Compiled Laws 769.12 Under MCL 769.12(1)(a), the minimum is 25 years when the current offense is a “serious crime” and at least one prior conviction is a “listed prior felony.”
Mandatory Minimums That Override the Calculation
Some statutes require a specific minimum term no matter what the grid says. When that happens, the mandatory minimum controls and the guidelines number gives way.10Michigan Legislature. Michigan Compiled Laws 769.34
The most common example is felony firearm, which covers possessing or carrying a firearm during a felony. A first conviction carries a flat two years, a second carries five years, and a third or subsequent carries ten years. The felony firearm term cannot be suspended, does not permit probation or parole, and runs consecutively to the underlying felony sentence, meaning it is served before the sentence for the main offense begins.14Michigan Legislature. Michigan Compiled Laws 750.227b
Outside felony firearm, Michigan generally runs sentences concurrently unless a statute directs otherwise. One exception matters at sentencing: when a person commits a new felony while an earlier felony charge is still pending, the two sentences may run consecutively at the judge’s discretion, and they must run consecutively if the new offense is a major controlled substance crime.15Michigan Legislature. Michigan Compiled Laws 768.7b
How Judges Can Depart From the Calculated Range
Before 2015, the guidelines were mandatory and a judge who wanted to sentence outside the range had to state a “substantial and compelling reason” on the record. In People v. Lockridge, the Michigan Supreme Court held that mandatory guidelines violated the Sixth Amendment because they required judges to find facts, for the OV scoring, that had not been admitted by the defendant or found by a jury beyond a reasonable doubt. The remedy was to make the guidelines advisory.1Michigan Courts. Sentencing Before and After Lockridge
Judges still have to calculate the correct range and consider it. They are free to go above or below it. In 2020, the legislature amended MCL 769.34 to replace the old “substantial and compelling” standard with a requirement that the departure be reasonable and that the judge state the reasons on the record. Appellate courts now review departure sentences for reasonableness. A judge cannot rest a departure on factors already reflected in the scoring unless the guidelines gave those factors inadequate weight.10Michigan Legislature. Michigan Compiled Laws 769.34
Even in advisory mode, the range pulls hard. A sentence inside the calculated range is presumed proportionate, which makes it much harder to challenge on appeal. A departure invites closer review. In practice, most sentences land within the range or very close to it.
Contesting the Score at Sentencing
Scoring errors happen, and a small mistake can move the range by months or years. Because the standard is preponderance of the evidence, the defense can contest points at the sentencing hearing by arguing that the presentence report mischaracterizes the facts or that the assigned variable does not fit the circumstances.
The strongest challenges usually target OVs where the scoring turns on interpretation. Whether an injury was life-threatening or only required treatment. Whether a weapon was truly displayed or simply present nearby. Every point on the scoring sheet is worth reviewing before the hearing, because if the OV total sits near the boundary between two levels on the grid, shaving five points off one variable can drop the defendant into a lower row with a meaningfully shorter recommended range. On appeal, OV and PRV scoring is reviewed for clear error, so the trial court’s factual findings stand unless clearly mistaken.
Plea negotiations affect the calculation for the same reason. Charge bargaining can move the case to a lower crime class and a different grid entirely. Fact bargaining, where the prosecution stipulates that certain aggravating circumstances did not occur, removes those facts from the OV scoring and can push the total into a lower level. The guidelines math often begins well before the sentencing hearing.