Almost every federal sentence starts with the United States Sentencing Guidelines. The guidelines turn the offense and the person’s criminal history into two numbers, an offense level and a criminal history category, and those two numbers produce a recommended range in months.
This guide explains how that calculation works, why the guidelines are advisory but still matter so much, and where the defense can affect the result. Sentencing works the same way in the Eastern and Western Districts of Missouri.
The calculation
How are federal sentencing guidelines calculated?
An offense level on one axis, a criminal history category on the other.
- 1. Base offense level. Each offense has a guideline that sets a starting level. In drug cases, it is driven by drug type and quantity. In fraud cases, by the amount of loss.
- 2. Specific offense characteristics. Levels are added for facts like a weapon, the number of victims, or the use of special skills, and sometimes subtracted.
- 3. Adjustments. More levels can be added or subtracted for the person’s role (leader or minor participant), obstruction of justice, and other factors.
- 4. Acceptance of responsibility. A timely guilty plea usually reduces the level by two, plus one more on the government’s motion.
- 5. Criminal history. Prior sentences are scored into points, which place the person in one of six categories, I through VI. A person with zero criminal history points may qualify for an additional two-level reduction if they meet the other requirements.
- 6. The range. The final offense level, from 1 to 43, and the criminal history category meet on the Sentencing Table to produce a range in months.
Criminal history is where errors often hide. A conviction that should not count can move a person up a category and raise the range by years. See federal presentence report objections.
Advisory
Are the federal sentencing guidelines mandatory?
No. They have been advisory since 2005, but judges must start with them.
In United States v. Booker (2005), the Supreme Court made the guidelines advisory. A judge must calculate the range correctly and consider it, but can impose a sentence above or below it. Most sentences still fall within or near the range, which is why getting the calculation right is so important.
The guidelines do not override a statutory mandatory minimum or maximum. If a mandatory minimum is higher than the guideline range, the minimum controls unless an exception, such as the safety valve or a substantial assistance motion, applies.
The judge’s decision
What factors does a federal judge consider at sentencing?
The factors in 18 U.S.C. § 3553(a).
The judge must impose a sentence “sufficient, but not greater than necessary” to meet the purposes of sentencing. The factors include:
- The nature and circumstances of the offense, and the history and characteristics of the person
- The need for the sentence to reflect the seriousness of the offense, deter crime, protect the public, and provide needed treatment or training
- The kinds of sentences available and the guideline range
- The need to avoid unwarranted disparities among similar defendants
- The need for restitution to victims
This is where the person’s life story matters: work, family, health, military service, addiction and treatment, and the circumstances that led to the offense. A sentencing memorandum and supporting letters and records give the judge reasons to impose a lower sentence.
The defense role
How can a defense lawyer lower a federal guideline range?
By contesting the facts and the scoring that drive the numbers.
- Drug quantity or loss amount, which often drives the largest part of the offense level.
- Enhancements, such as a weapon, role, or obstruction, each of which must be supported by the evidence.
- Criminal history scoring, including whether old convictions fall inside the time limits for counting and whether invalid convictions should count at all.
- Plea terms, which can include agreed guideline calculations.
- Arguments for a lower sentence based on the § 3553(a) factors, even when the range is calculated correctly.
These issues have to be raised on time, in written objections to the presentence report and at the sentencing hearing. An issue not raised can be lost.
FAQ
Federal sentencing guideline questions
What is an offense level in federal sentencing?
A number from 1 to 43 that reflects the seriousness of the offense after adding and subtracting for specific facts and adjustments. Combined with the criminal history category, it determines the guideline range.
Can a federal judge sentence below the guidelines?
Yes. The guidelines are advisory. The judge must calculate and consider the range, but can impose a lower sentence based on the 18 U.S.C. § 3553(a) factors, unless a mandatory minimum applies.
Who calculates the guideline range?
A U.S. Probation officer prepares a presentence report with a proposed calculation. Both sides can object, and the judge makes the final determination at sentencing.
What is a zero-point offender?
A person with no criminal history points. A guideline adopted in 2023 provides a two-level reduction for zero-point offenders who meet additional requirements, such as no violence, no firearm, and no aggravating role.
How much does a guilty plea reduce a federal sentence?
Acceptance of responsibility usually reduces the offense level by two, plus a third level on the government’s motion for a timely plea. Other plea terms may matter more.
More on federal cases: federal plea agreements and what happens after sentencing. See our federal criminal defense page, or call 573-638-8529.
Talk to us
The numbers are built from facts. Facts can be contested.
If you are facing federal sentencing in Missouri, call before the presentence interview.
Attorney advertising. The choice of a lawyer is an important decision and should not be based solely upon advertisements. This article is general information about federal sentencing as of October 2026, not legal advice, and it does not create an attorney-client relationship. The guidelines are amended regularly, and outcomes depend on the facts of each case.
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