Introductory Commentary

This part provides rules for determining a single offense level that encompasses all the counts of which the defendant is convicted. These rules apply to multiple counts of conviction (A) contained in the same indictment or information; or (B) contained in different indictments or informations for which sentences are to be imposed at the same time or in a consolidated proceeding. The single offense level that results from applying these rules is used, after adjustment pursuant to the guidelines in subsequent parts, to determine the applicable guideline range.

The Commission first designed these rules primarily based on the more commonly prosecuted offenses with the goals of providing incremental punishment for significant additional criminal conduct, preventing multiple punishments for substantially identical conduct, and limiting the significance of the formal charging decision. These goals led to the development of three principles: (1) combining the offense behavior of offenses using a Chapter Two guideline primarily based on the total amount of harm or loss, the quantity of a substance involved, or some other measure of aggregate harm; (2) grouping related offenses together and assigning an offense level based on the most serious of the related offenses; and (3) assigning incremental offense-level increases based on any remaining unrelated offenses using a unit system. The Guidelines Manual expanded on these three principles in five guidelines, each containing several rules that courts and commenters frequently found confusing, particularly the rules for determining whether multiple offenses were related or unrelated.

In 2026, the Commission revised Chapter Three, Part D to simplify the multiple count rules while maintaining the goals and principles of the original rules. The current rules still combine offenses to which the applicable Chapter Two guideline is primarily based on the total amount of harm or loss, the quantity of a substance involved, or some other measure of aggregate harm. However, to simplify the process for assigning incremental punishment in certain cases, the current rules set forth one rule that was developed based on the situations where incremental punishment applied most frequently under the original rules and the average increase involved in those cases. This rule provides for incremental offense-level increases to multiple counts involving different victims or the same victim on different occasions, such as multiple counts of murder, assault, robbery, and sexual abuse, based solely on the number of counts instead of a unit system.