Recalculation of Earned and Good Time Credits

Recalculation of earned and good time credits refers to the way the Federal Bureau of Prisons computes and revises a person's release date as good conduct time and First Step Act earned time credits accrue, change, or are corrected. Two separate credit systems drive these numbers. Good conduct time comes from 18 U.S.C. § 3624(b) and is worth up to 54 days for each year of the sentence the court imposed. First Step Act time credits come from 18 U.S.C. § 3632 and are earned at 10 or 15 days for every 30 days an eligible person spends in approved programming. The two are calculated differently, applied differently, and recalculated for different reasons.

The most consequential recalculation in recent memory happened in 2018 and 2019. Congress changed how good conduct time is figured. The Bureau of Prisons then had to redo the math for the entire federal population. On July 19, 2019, 3,163 people walked out of federal custody on a single day because the new method gave them credit they had been denied under the old one.

Overview

Good conduct time and First Step Act time credits answer different questions. Good conduct time asks whether a person followed the rules. First Step Act credits ask whether a person did the programming. A person can earn both at the same time.

Good conduct time is a near-automatic deduction. Absent disciplinary findings, it accrues at the statutory rate and shortens the term of imprisonment itself. First Step Act time credits are not automatic. They are earned in 30-day increments tied to participation in specific programs, and they do not shorten the sentence. They move a person earlier into prerelease custody, such as a residential reentry center or home confinement, or they count toward supervised release.

Recalculation happens for ordinary reasons and for unusual ones. The ordinary reason is time passing. Good conduct time vests on the anniversary of a sentence, and First Step Act credits are tallied as new programming is completed, so a person's projected release date shifts on a predictable schedule. The unusual reasons are court action and error. A vacated count, a sentence reduction, or a correction of a prior miscalculation forces the Bureau to start the computation over.

Good Conduct Time (§3624(b))

Good conduct time is the older of the two systems. Federal law allows up to 54 days of credit per year for a person who is serving a sentence of more than one year but less than life and who has not lost credit through discipline.

The 54-day figure was on the books for years before anyone actually received the full amount. The reason was a dispute over four words. The statute said credit was available "at the end of each year" of the term of imprisonment. The Bureau read "term of imprisonment" to mean time actually served. Under that reading, a person could not earn a full 54 days in the final partial year of a sentence, because there was no full year of service left to credit. The arithmetic worked out to roughly 47 effective days per year rather than 54.

The Supreme Court upheld the Bureau's reading in Barber v. Thomas in 2010. The interpretation stood until Congress overrode it. Section 102(b) of the First Step Act, signed December 21, 2018, rewrote the provision so that credit is calculated against the sentence the judge imposed rather than the time served. That single change restored the full 54 days per year for most people.

The change was not large per year. The gap between 47 and 54 days is seven days annually. Over a long sentence the days add up. A person serving ten years gained roughly seventy days. People already near the end of their sentences were over their new release dates the moment the recalculation ran. The Bureau prioritized those cases, recalculated the rest of the population by proximity to release, and released 3,163 people on July 19, 2019, the day the recalculated dates took effect.

The 2018 statute set the substance. A 2022 final rule, published in the Federal Register on February 11, 2022, settled the mechanics. It confirmed that credit for the last year of a term is credited on the first day of that last year, which removes the partial-year problem that produced the 47-day figure in the first place.

Good conduct time can be lost. A disciplinary finding can result in disallowance or forfeiture of credit, which pushes the release date later. Recalculation runs in that direction too.

First Step Act Earned Time Credits

First Step Act time credits are the newer system and the more complicated one. They are authorized by 18 U.S.C. § 3632(d)(4). An eligible person earns 10 days of credit for every 30 days of successful participation in evidence-based recidivism reduction programming or productive activities.

A person can reach a higher rate. Someone assessed at minimum or low risk of recidivism who has maintained that level across two consecutive assessments earns 15 days for every 30 days of programming instead of 10. That is the difference between one day of credit for every three days of programming and one day for every two.

Risk level is set by a tool called PATTERN, short for Prisoner Assessment Tool Targeting Estimated Risk and Needs. PATTERN scores criminal history, age, institutional conduct, education, program completion, and other factors, then sorts a person into minimum, low, medium, or high risk. The score is reassessed periodically, which is why a person's earning rate and the way credits can be applied both move over time.

The credits do not shorten the sentence. They are applied in two places. Up to 12 months of accumulated credits can move a person earlier into prerelease custody, meaning a residential reentry center or home confinement. Credits beyond that 12-month cap, or credits earned by people not yet cleared for prerelease custody, can be applied toward the term of supervised release that follows imprisonment. To apply credits toward prerelease custody, a person generally must be assessed at minimum or low risk on the two most recent reviews, or be approved by the warden through a petition.

Because PATTERN scores change and programming continues, the credit total is never static. The Bureau recalculates it as new programming is completed, as assessments are updated, and as risk levels move. Credits can also be lost. A serious disciplinary infraction can cost earned credits, though lost credits can be restored once a person returns to compliance.

Eligibility and Exclusions

The two credit systems have different eligibility rules.

Good conduct time reaches almost everyone. A person serving more than one year and less than a life sentence is eligible. Life sentences earn no good conduct time because there is no release date to advance. Disciplinary findings reduce the amount but do not remove the eligibility itself.

First Step Act time credits are narrower. Two things can block them. The first is the conviction. The statute lists disqualifying offenses at 18 U.S.C. § 3632(d)(4)(D). That list includes a set of serious violent crimes, sex offenses, certain terrorism offenses, and other specified felonies. A person convicted of a listed offense cannot earn First Step Act credits at all, regardless of programming or risk score, and that bar is permanent for that conviction.

The second is application rather than earning. A person who is eligible to earn credits may still be unable to apply them toward prerelease custody if their PATTERN risk level is too high. Credits keep accruing in that situation. They are held until the risk level drops or the warden approves their use, and in the meantime they can still count toward supervised release.

Eligibility can change after sentencing. If a disqualifying count is vacated on appeal or through a post-conviction motion, the bar can lift, and the Bureau may then credit programming the person completed while the disqualifying count was still on the record. That is one of the situations that forces a full recalculation.

Detainers and immigration status complicate application. A person subject to a final order of removal generally cannot apply First Step Act credits toward release, which has been the subject of separate Bureau guidance and litigation.

Frequently Asked Questions

Q: What is the difference between good conduct time and First Step Act credits?

Good conduct time, under 18 U.S.C. § 3624(b), is up to 54 days per year for following prison rules, and it shortens the sentence itself. First Step Act earned time credits, under 18 U.S.C. § 3632, are 10 or 15 days for every 30 days of approved programming, and they move a person earlier into prerelease custody or count toward supervised release rather than shortening the sentence.

Q: Why did the First Step Act recalculate good conduct time?

Before the First Step Act, the Bureau of Prisons calculated good conduct time against time actually served, which produced roughly 47 effective days per year instead of the 54 days the statute allowed. The First Step Act, signed December 21, 2018, changed the calculation to the sentence the court imposed. The Bureau then recalculated every release date and on July 19, 2019, released 3,163 people whose new dates had already passed.

Q: How many days of good conduct time can a federal prisoner earn per year?

Up to 54 days for each year of the sentence imposed, for a person serving more than one year and less than a life sentence, provided no credit has been lost through discipline.

Q: How many First Step Act credits can you earn?

Ten days of credit for every 30 days of successful programming. A person assessed at minimum or low risk on two consecutive PATTERN assessments earns 15 days for every 30 days instead.

Q: Who is not eligible for First Step Act time credits?

People convicted of offenses listed at 18 U.S.C. § 3632(d)(4)(D), including certain serious violent crimes, sex offenses, and terrorism offenses, cannot earn First Step Act credits. People with a final order of removal generally cannot apply credits toward release. A high PATTERN risk score does not stop credits from accruing but can block their use toward prerelease custody until the score drops.

Q: Can First Step Act credits be lost?

Yes. A serious disciplinary infraction can cost earned credits. Lost credits can be restored once the person returns to compliance with program rules.

Q: What triggers a recalculation of credits?

Routine events such as the annual vesting of good conduct time and the completion of new programming trigger ordinary recalculation. A court-ordered sentence reduction, a vacated count, a PATTERN reassessment, or the correction of a prior computation error triggers a full recalculation of the projected release date.