Every federal sentencing follows the same three-step structure. The court calculates the guidelines range. The court considers departures within the guidelines system. The court then imposes a sentence that is sufficient but not greater than necessary under 18 U.S.C. § 3553(a), which may be inside or outside the range.
Step one: the offense level
Chapter Two of the Guidelines Manual assigns a base offense level to each type of crime. Fraud starts at level 6 or 7 under § 2B1.1. Drug offenses draw a level from a quantity table under § 2D1.1. Firearms, tax, immigration, and violent offenses each have their own guideline.
Specific offense characteristics then adjust that base level. In fraud cases, the loss table is the dominant driver: losses above $6,500 add 2 levels, and the increments climb to 30 levels at losses above $550 million. Additional enhancements apply for the number of victims, use of sophisticated means, abuse of a position of trust, and dozens of other findings.
Chapter Three adds adjustments that cut both ways: role in the offense, from a 4-level increase as an organizer or leader to a 4-level decrease as a minimal participant; obstruction of justice; vulnerable victims; and acceptance of responsibility, which reduces the level by 2, or by 3 if the offense level is 16 or greater and the plea is timely.
Step two: criminal history
Chapter Four converts prior convictions into points. Prior sentences exceeding thirteen months count 3 points each; sentences of at least sixty days count 2; most others count 1, capped at 4 points. Points place the defendant in one of six criminal history categories, I through VI. Career offender and armed career criminal provisions can override the ordinary calculation and produce dramatically higher ranges.
Recent amendments matter here. The Commission eliminated "status points" for most defendants who committed an offense while under a criminal justice sentence, and added a two-level reduction under § 4C1.1 for certain defendants with zero criminal history points who meet a list of disqualifying criteria.
Step three: the table, and everything above it
The final offense level and criminal history category intersect on a 43-by-6 table to produce a range in months — level 20, category I is 33 to 41 months, for example. Zones A through D determine eligibility for probation or alternatives to imprisonment at the low end.
Two constraints override the table. A statutory mandatory minimum trumps a lower guideline range; the range becomes the mandatory term unless the defendant qualifies for the safety valve under 18 U.S.C. § 3553(f) or the government files a substantial-assistance motion under § 5K1.1. A statutory maximum caps a higher range.
The guidelines are advisory in law and gravitational in practice. A miscalculated range is reversible error even when the sentence imposed is outside it.
What "advisory" actually means
Before 2005, the guidelines were mandatory. In United States v. Booker, the Supreme Court held that mandatory application violated the Sixth Amendment and excised the provision making them binding. In Gall v. United States and Kimbrough v. United States, the Court confirmed that district courts may vary from the range based on the § 3553(a) factors, including disagreement with a guideline as a matter of policy, subject to review for abuse of discretion.
The practical consequence is a two-track argument at every sentencing. The defense contests guideline calculations — loss amount, role, enhancements, criminal history — because the range anchors the outcome. The defense then argues for a variance under § 3553(a): the nature of the offense, the history and characteristics of the defendant, deterrence, protection of the public, rehabilitation, and the need to avoid unwarranted disparities.
Facts, proof, and the presentence report
Guideline facts are found by the judge, not a jury, and by a preponderance of the evidence, not beyond a reasonable doubt. This is why disputed loss amounts, drug quantities attributable to a conspiracy, and relevant conduct under § 1B1.3 — which sweeps in uncharged and even acquitted conduct in some circumstances — are litigated so intensely. Relevant conduct is the single most misunderstood feature of the system: a defendant who pleads to one count can be sentenced on the basis of an entire scheme.
The vehicle for all of it is the presentence investigation report prepared by United States Probation. It contains the officer's guideline calculation, the offense conduct, and the defendant's history. Both parties file written objections, the officer responds in an addendum, and unresolved disputes are argued at the hearing. Because the report follows the defendant into the Bureau of Prisons and influences custody classification and program eligibility, its factual content matters well beyond the sentence itself.