Resentencing is a federal court proceeding in which a judge re-evaluates a criminal sentence that has already been finalized, and in the federal system it happens through 18 U.S.C. § 3582(c) and a few other narrow statutory routes. Because federal law treats a sentence as locked in once imposed, reopening one requires fitting the case into a defined legal pathway, meeting that pathway’s deadlines, and persuading the court that a reduction is warranted on the merits.
Dissatisfaction with the length of a sentence is not, by itself, grounds for revisiting it. The question is always whether one of the specific channels Congress and the courts have created applies.
The Pathways That Allow Resentencing
Four routes account for nearly all federal resentencing motions. Each has its own eligibility rules, timing, and procedural requirements.
Compassionate Release
Under 18 U.S.C. § 3582(c)(1)(A), a court can reduce a prison term when “extraordinary and compelling reasons” justify doing so. Before 2018, only the Bureau of Prisons could file these motions. A defendant can now file directly with the court after first asking the warden to bring a motion on their behalf. If the warden denies the request or fails to respond within 30 days of receiving it, the defendant can go straight to the court, which is why documenting the date of delivery matters.1Office of the Law Revision Counsel. 18 USC 3582 – Imposition of a Sentence of Imprisonment
The U.S. Sentencing Commission’s policy statement identifies the circumstances that count as extraordinary and compelling. They include terminal illness or serious decline the prison cannot adequately treat; advanced age combined with deteriorating health and significant time served; the death or incapacitation of the only available caregiver for the defendant’s minor child, or the need to care for an incapacitated spouse, partner, or parent when no one else can; sexual assault or serious physical injury inflicted by someone with custody over the defendant; and unusually long sentences where at least 10 years have been served and a change in law has produced a gross disparity with what would be imposed today. A catchall covers other circumstances comparable in seriousness.2U.S. Sentencing Commission. Preliminary 2026 Reader-Friendly Amendments to the Federal Sentencing Guidelines
Qualifying is necessary but not sufficient. Even when a defendant fits one of these categories, the court still has to weigh the sentencing factors under 18 U.S.C. § 3553(a) before granting a reduction.
First Step Act and Retroactive Guideline Changes
Section 404 of the First Step Act of 2018 created a resentencing pathway for people sentenced under the pre-2010 federal crack cocaine laws. Anyone sentenced for a crack cocaine offense committed before August 3, 2010, who did not already benefit from the Fair Sentencing Act’s changes, can ask to be resentenced as if those changes had been in effect at the time.3Congress.gov. First Step Act of 2018 – Public Law 115-391 The motion can be brought by the defendant, the government, the Bureau of Prisons, or the court itself. Courts are not required to grant any reduction, and a defendant whose previous motion was denied on the merits cannot file a second one.
Beyond the First Step Act, the Sentencing Commission periodically lowers sentencing guideline ranges and makes those changes retroactive. When that happens, 18 U.S.C. § 3582(c)(2) lets defendants sentenced under the old, higher range ask for a reduction consistent with the new guidelines.
Section 2255 Motions
When the original sentence was imposed in violation of the Constitution or federal law, or the sentencing court lacked jurisdiction, a federal prisoner can file a motion under 28 U.S.C. § 2255 to vacate, set aside, or correct the sentence. This is the main vehicle for claims like ineffective assistance of counsel at sentencing, where defense performance fell so far below professional standards that it affected the outcome.4Office of the Law Revision Counsel. 28 USC 2255 – Federal Custody; Remedies on Motion Attacking Sentence
Time is the critical constraint. A § 2255 motion must be filed within one year from the latest of four possible trigger dates: when the conviction becomes final, when a government-created impediment is removed, when the Supreme Court recognizes a new retroactive constitutional right, or when the facts supporting the claim could have been discovered through reasonable diligence. Miss the deadline, and the motion is almost certainly barred. A second or successive § 2255 motion faces an even higher bar, requiring certification from a federal appeals court that the motion relies on newly discovered evidence or a new retroactive rule of constitutional law.
Rule 35 Corrections
Federal Rule of Criminal Procedure 35(a) gives a sentencing court just 14 days to fix a sentence that resulted from arithmetical, technical, or other clear error. This covers things like a miscalculated guideline range or a judgment listing the wrong statutory maximum. Once the 14-day window closes, a simple clerical mistake generally cannot be fixed through this rule.5Legal Information Institute. Federal Rules of Criminal Procedure Rule 35
Rule 35(b) is a separate mechanism. The government, not the defendant, can move for a sentence reduction when a defendant provides substantial assistance in investigating or prosecuting another person. The motion has its own timing requirements and depends entirely on the prosecutor’s willingness to file it.
What Judges Weigh
For most resentencing motions, the court is required to consider the factors in 18 U.S.C. § 3553(a):
- The nature of the offense and the history and characteristics of the defendant.
- Whether the sentence reflects the seriousness of the offense, deters future criminal conduct, protects the public, and provides needed training, education, or treatment.
- The applicable sentencing guideline range and any relevant Sentencing Commission policy statements.
- The need to avoid unwarranted sentencing disparities among similarly situated defendants.
- Restitution to victims.6Office of the Law Revision Counsel. 18 USC 3553 – Imposition of a Sentence
In practice, judges pay close attention to what has changed since the original sentencing. A defendant’s behavior in prison matters: not just the absence of disciplinary problems, but affirmative evidence of growth. Completed educational programs, sustained work history, drug treatment records, and genuine insight into the harm caused by the offense all help. Generic letters claiming someone has changed carry far less weight than a documented record of effort over years.
Public safety is typically the factor that sinks otherwise strong motions. Even when a defendant qualifies on paper, a judge who believes the person still presents a meaningful risk to the community will deny the motion. Age, health, the nature of the original offense, and the length of time already served all feed into that assessment.
Victims of the original offense also have a role. Under the Crime Victims’ Rights Act, they have a right to reasonable notice of any public court proceeding involving sentencing and a right to be reasonably heard at that proceeding.7Office of the Law Revision Counsel. 18 USC 3771 – Crime Victims Rights Their input does not control the outcome, but it is part of the record the judge considers.
Possible Outcomes
A successful motion can produce a reduced prison term, which moves up the release date. In some cases, the court vacates the remaining time entirely and credits time already served, leading to release. The court can also modify the terms of supervised release, shortening the duration, removing specific conditions, or adjusting reporting requirements. A reduction in prison time does not automatically produce a proportional change to supervised release; those are separate decisions.8Office of the Law Revision Counsel. 18 USC 3583 – Inclusion of a Term of Supervised Release After Imprisonment
The court also has full authority to deny the motion and leave the original sentence in place. Denials are common, and even when a motion succeeds, release on the hearing date is not automatic. Processing and release planning follow.
Can the Sentence Go Up?
Through the common resentencing routes, no. Section 3582(c)(1)(A) only authorizes the court to “reduce” a term of imprisonment, so compassionate release cannot produce a longer sentence.1Office of the Law Revision Counsel. 18 USC 3582 – Imposition of a Sentence of Imprisonment First Step Act motions similarly authorize courts to “impose a reduced sentence.”3Congress.gov. First Step Act of 2018 – Public Law 115-391
The picture changes when resentencing follows a successful appeal that vacated the original sentence entirely. The Supreme Court held in North Carolina v. Pearce that the Constitution does not absolutely bar a more severe sentence on resentencing after a conviction is overturned. Due process does require that vindictiveness against a defendant for exercising the right to appeal play no part in the new sentence, and any reasons for a harsher sentence must be based on objective facts, placed on the record, and available for appellate review.9Justia. North Carolina v. Pearce, 395 US 711 (1969)
Representation and Appeals
Whether you are entitled to a court-appointed attorney depends on the type of proceeding. Under the Criminal Justice Act, a financially eligible defendant facing a modification, reduction, or revocation of supervised release must be provided with counsel. For § 2255 motions, the court has discretion to appoint counsel when the “interests of justice” require it.10United States Courts. Guide to Judiciary Policy, Vol. 7A, Ch. 2 – Appointment and Payment of Counsel Financial eligibility turns on whether your resources and income are enough to hire a qualified attorney after covering basic necessities for yourself and your dependents, and doubts are resolved in the defendant’s favor. Someone with partial resources can be found eligible and directed to contribute toward the cost.
For compassionate release motions, appointment is not guaranteed, but courts routinely appoint counsel when the motion appears to have merit, particularly in medically complex cases. Pro se filing is always an option. The procedural and evidentiary requirements make it a demanding one.
If the court denies a resentencing motion, a notice of appeal must be filed in the district court within 14 days of the order. A court can extend that by up to 30 additional days for excusable neglect or good cause, but relying on an extension is risky.11Legal Information Institute. Federal Rules of Appellate Procedure Rule 4 The standard of review on appeal depends on what was denied. Compassionate release denials are generally reviewed for abuse of discretion, a deferential standard that asks whether the lower court considered the right factors and reached a reasonable conclusion, not whether the appellate judges would have decided differently. Section 2255 motions involving constitutional claims get closer review of legal conclusions. In every case, filing the notice of appeal on time is the non-negotiable first step.