Two federal changes are currently moving people out of prison earlier than their original sentences called for: Amendment 821 to the federal sentencing guidelines, which became retroactive on February 1, 2024, and the First Step Act’s earned time credit system, which the Bureau of Prisons continues to expand. These are the main new federal laws that can release inmates early, and they work in very different ways. Amendment 821 rewrites how a past sentence was calculated and asks a judge to shorten it. Earned time credits reward program participation during the sentence and shift eligible inmates into prerelease custody sooner.
Amendment 821: A Shorter Sentence Through the Court
The United States Sentencing Commission finalized Amendment 821 and made it retroactive, meaning people already serving sentences can petition for a reduction.{1United States Sentencing Commission. Amendment 821} It has two parts, each covering a different group.
Part A: Status Points
Before the amendment, any federal defendant who committed an offense while already under a criminal justice sentence — probation, parole, supervised release, or imprisonment — automatically received two extra criminal history points. Those points often pushed defendants into a higher criminal history category and a longer guideline range. Part A changed that. A defendant now receives only one extra point, and only if they already have seven or more criminal history points from other sources.{1United States Sentencing Commission. Amendment 821} The Commission estimated roughly 7,272 inmates already serving time would qualify for a lower guideline range under Part A, with an average reduction of about 15 months.{2Federal Register. Sentencing Guidelines for the United States Courts}
Part B: Zero-Point Offenders
Part B created a new guideline section, §4C1.1, giving a two-level reduction in offense level to defendants with no criminal history points whose offense did not involve certain aggravating factors.{3United States Sentencing Commission. Retroactive Application of Parts A and B, Subpart 1 of Amendment 821} At the guideline ranges where most federal sentences fall, a two-level drop can mean months or years off a prison term.
Every one of the following must be true. Failing one disqualifies the defendant:
- Zero criminal history points under Chapter Four, Part A of the guidelines.
- No terrorism adjustment.
- No violence or credible threats of violence.
- The offense did not result in death or serious bodily injury.
- Not a sex offense.
- The defendant did not personally cause substantial financial hardship.
- No firearm or other dangerous weapon possessed or transferred in connection with the offense.
- Not a civil rights offense covered by the relevant guideline.
- No hate crime, vulnerable victim, or serious human rights offense enhancement.
- No aggravating-role (leadership) adjustment.
- Not engaged in a continuing criminal enterprise as defined by federal drug law.
The Commission estimated 11,495 currently incarcerated people would qualify under Part B, with an average reduction of about 14 months.{4United States Sentencing Commission. USSG 4C1.1 Adjustment for Certain Zero-Point Offenders} By the time the Commission published its retroactivity data report for Part B, 3,910 motions had been granted, averaging a 15-month reduction.{5United States Sentencing Commission. Retroactivity Data Report on Amendment 821, Part B}
How to File for an Amendment 821 Reduction
Nothing happens automatically. The inmate, the Bureau of Prisons, or the court itself must file a motion under 18 U.S.C. § 3582(c)(2), which authorizes a judge to reduce a prison term when the Sentencing Commission retroactively lowers the applicable guideline range.{6Office of the Law Revision Counsel. 18 USC 3582 – Imposition of a Sentence of Imprisonment} The judge who imposed the original sentence reviews the motion and has full discretion to grant or deny it after weighing public safety and the factors in 18 U.S.C. § 3553(a).
The core documents are the Pre-Sentence Report from the original case, which contains the initial guideline calculations, and the Judgment and Commitment Order, which shows the sentence imposed and the statutes of conviction. The motion must reference Amendment 821 and show, step by step, how the new guideline range would be lower. For a status-points case, that means recalculating the criminal history score without the old two-point add-on and identifying the new category. For a zero-point case, it means applying the two-level offense reduction and showing the resulting range. Motions that fail to clearly demonstrate the new math often get denied, sometimes without explanation.
The motion is filed with the Clerk of Court in the district where the original sentencing took place. Many inmates file pro se, though some federal districts issued standing orders directing Federal Public Defender offices to coordinate representation for defendants who previously had appointed counsel. Once filed, the U.S. Probation Office prepares an eligibility report for the sentencing judge.{1United States Sentencing Commission. Amendment 821} If granted, the court issues the reduction on Form AO 247.{7United States Courts. Order Regarding Motion for Sentence Reduction Pursuant to 18 USC 3582(c)(2)} Turnaround varies by district, but most courts aimed to resolve cases within a few months of filing. The amendment has no filing deadline, but delay means more time served that could have been avoided.
First Step Act Earned Time Credits
The First Step Act, signed in 2018, created a separate system of earned time credits for eligible inmates who complete approved programming.{8Federal Bureau of Prisons. An Overview of the First Step Act} These credits are tied to participation in recidivism-reduction programs and productive activities such as vocational training, educational courses, and cognitive behavioral programming.
How the Credits Add Up
Every eligible inmate earns 10 days of credit for every 30 days of successful participation. Inmates classified as minimum or low risk for recidivism who have maintained that classification over two consecutive assessments earn 5 additional days, for a total of 15 days per 30-day period.{9Office of the Law Revision Counsel. 18 USC 3632 – Development of Risk and Needs Assessment System} Risk level is set using the Prisoner Assessment Tool Targeting Estimated Risk and Needs (PATTERN), which produces a general recidivism score and a violent recidivism score, with different thresholds for men and women. Only inmates who score minimum or low on both scales qualify for earlier transfer out of secure custody.{10United States Sentencing Commission. First Step Act Earned Time Credits}
Where the Credits Get Applied
Earned time credits do not simply subtract days off the sentence and open the front door. They can be applied toward earlier transfer to prerelease custody, either a residential reentry center (halfway house) or home confinement with electronic monitoring.{11Office of the Law Revision Counsel. 18 USC 3624 – Release of a Prisoner} The statute also allows transfer to supervised release up to 12 months early for inmates with enough credits who meet the risk-level requirements. On home confinement, the inmate must remain at the approved residence except for court-approved activities such as work, medical treatment, religious services, or program participation.
Who Cannot Earn These Credits
Congress attached a long exclusion list. Inmates serving sentences for certain offenses are completely ineligible regardless of behavior or risk score. Excluded categories include terrorism, espionage, sexual exploitation of children, murder and manslaughter, kidnapping, carjacking resulting in serious injury, armed robbery, drug offenses carrying a life sentence, and using a firearm during a crime of violence or drug trafficking offense, among many others.{9Office of the Law Revision Counsel. 18 USC 3632 – Development of Risk and Needs Assessment System} The full list in 18 U.S.C. § 3632(d)(4)(D) runs to dozens of specific statutes, so the exact statute of conviction should be checked against it when there is any doubt.
Good Time Credits Stack on Top
Good time credits are a separate, older program and should not be confused with First Step Act earned time credits. Under 18 U.S.C. § 3624(b), an inmate can receive up to 54 days of credit for each year of the imposed sentence based on following institutional rules, not on specific programming.{11Office of the Law Revision Counsel. 18 USC 3624 – Release of a Prisoner} The First Step Act clarified that this 54-day calculation is based on the sentence imposed by the judge rather than time actually served, which was a change from the Bureau’s prior interpretation.{8Federal Bureau of Prisons. An Overview of the First Step Act} The two credit systems run in parallel, so someone with a 10-year sentence can serve considerably less by maintaining a clean disciplinary record and participating in programming.
What to Do Now
For a possible Amendment 821 case, the first step is confirming whether a motion has already been filed. Many districts processed the bulk of eligible cases in 2024, and some courts acted on their own initiative. Anyone who believes they qualify and has heard nothing from the court or a public defender should file promptly, with the Pre-Sentence Report and Judgment and Commitment Order in hand and the new guideline math laid out clearly.
For earned time credits, the levers are risk classification and program participation. Staying enrolled in approved programs, avoiding disciplinary infractions, and requesting updated PATTERN assessments all affect how fast credits accrue and whether they translate into prerelease custody. The Bureau of Prisons has automated much of its credit tracking, but inmates and families should independently verify that credits are being recorded correctly, because administrative errors in this area are not uncommon.