Federal sentencing
What a Federal Judge Must Consider: The § 3553(a) Factors
The Guidelines give the judge a range. Section 3553(a) is the law the judge actually sentences under — and it is where your family member's story counts.
Written by Brandon Sample · Updated
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A federal judge must give a sentence that is "sufficient, but not greater than necessary" to meet the goals of sentencing. That rule comes from 18 U.S.C. § 3553(a), the main federal sentencing law. In plain terms: long enough, but no longer than it needs to be. Lawyers call this the parsimony principle.
The Guidelines range is only one part of that law. The rest is where your family member's life, history and future come in.
The seven things the judge must consider
- What happened, and who your family member is. The statute calls this the "nature and circumstances of the offense" and the person's "history and characteristics."
- What the sentence needs to do. Reflect how serious the crime was, promote respect for the law, punish fairly, deter crime, protect the public, and provide needed training, medical care or treatment.
- The kinds of sentences available, such as prison, probation, home confinement or fines.
- The Sentencing Guidelines range.
- The Sentencing Commission's policy statements.
- The need to avoid unfair differences between people with similar records who did similar things.
- The need to pay back victims (restitution).
The Guidelines are one factor out of seven. They are not the whole law.
How a strong § 3553(a) argument works
It is honest about the offense. Judges stop listening when a family or a lawyer pretends the crime didn't happen.
It is specific about the person. This is not a full life story. It is the facts that change what prison will do to this particular person: addiction and recovery, military service, children at home, age, health, work history, and how this case differs from the typical one.
It ties the number to a reason. It explains why a shorter sentence still protects the public and still deters. If a longer term would wreck a life that can be rebuilt, it says so and shows why, with records, letters and a realistic plan.
Can the judge go below the Guidelines range?
Yes. Since United States v. Booker, 543 U.S. 220 (2005), the Guidelines have been advisory, not mandatory. A sentence outside the range is called a "variance."
In Gall v. United States, 552 U.S. 38 (2007), the Supreme Court said a judge does not need "extraordinary" circumstances to go below the range. In Kimbrough v. United States, 552 U.S. 85 (2007), the Court said a judge may disagree with the crack cocaine Guidelines when setting a sentence. Since November 1, 2025, the Guidelines Manual itself describes sentencing as two steps: figure out the range, then apply § 3553(a) (U.S. Sentencing Commission).
The judge still has to explain the reasons. Those reasons usually come from the sentencing memorandum, so start gathering letters, records and proof of treatment or work as early as you can.
After the sentence is final
The same factors come back when a judge decides whether to lower a sentence later, for example in a First Step Act § 404 motion or many sentence-reduction motions.
Being eligible only opens the door. The § 3553(a) factors decide whether the judge actually lowers the number, and by how much. In Concepcion v. United States, 597 U.S. 481 (2022), the Supreme Court held that a judge deciding a First Step Act motion may consider later changes in the law and in the person's life, such as good conduct and programs completed in prison.
Facing a federal sentence? Book a consultation to talk it through with Brandon Sample.
Common questions
What is § 3553(a)?
It is the federal law that lists what a judge must consider in choosing a sentence. The list includes the offense, the person's history and characteristics, the need for the sentence to reflect the seriousness of the crime and protect the public, the Guidelines range, and the need to avoid unwarranted differences between similar defendants (18 U.S.C. § 3553(a)). The law also tells the judge to impose a sentence "sufficient, but not greater than necessary" to meet those goals.
Does a federal judge have to follow the Sentencing Guidelines?
No. The Guidelines are advisory, so a judge can sentence above or below the range (United States v. Booker, 543 U.S. 220 (2005)). But the judge must calculate the range correctly first, use it as the starting point, and explain any sentence outside it (Gall v. United States, 552 U.S. 38 (2007)).
Do letters to the judge help at sentencing?
They can. Federal law puts no limit on the information about a defendant's background, character and conduct that a judge may consider at sentencing (18 U.S.C. § 3661), and the judge must consider the person's "history and characteristics" (18 U.S.C. § 3553(a)(1)). Letters from people who know the person well are a common way that information reaches the judge.
Does pleading guilty lower a federal sentence?
Usually, through the Guidelines. A defendant who clearly accepts responsibility gets a 2-level reduction in the offense level, and the government can move for 1 more level if the offense level is 16 or higher and the defendant told the government in time that he would plead guilty (USSG § 3E1.1). A guilty plea does not guarantee the reduction, but it is significant evidence of acceptance (USSG § 3E1.1, comment. (n.3)).