- The Bureau of Prisons released 18,084 incarcerated individuals from federal custody in calendar year 2024 after applying First Step Act time credits.[1]
- Eligible inmates can earn up to 15 days of FSA time credits per 30 days of programming under 18 U.S.C. § 3632(d)(4), with a 365-day cap on credits applied to early release under § 3624(g)(3).[2]
- Eligibility is governed by 68 disqualifying offense categories, the PATTERN risk score, and BOP Program Statement 5410.01.[3] Most credit losses happen on technicalities, not legal disqualification.
The First Step Act of 2018 is the most consequential federal sentencing reform of the last forty years. For families and defendants, the practical question is rarely whether the law applies, but how much actual time it returns.
The answer is more complicated than most write-ups suggest. The statute, the regulations, the BOP’s own program statement, and the PATTERN risk system all interact in ways that can change a release date by months.
This guide walks through how First Step Act earned time credits are calculated, who qualifies, how they convert into halfway house and home confinement time, and what the BOP’s 2025 calculation reforms mean for current inmates.
What Did the First Step Act Actually Change About Federal Early Release?
The First Step Act of 2018 created two parallel mechanisms that did not exist before. It amended 18 U.S.C. § 3624(b) so good conduct time is calculated against the sentence imposed rather than time served.
It also added 18 U.S.C. § 3632(d)(4), a brand-new earned-time-credit framework tied to participation in evidence-based recidivism reduction programming.
Those two pieces work in different ways. Good conduct time is automatic for inmates with clear disciplinary records and applies to almost every federal sentence. FSA earned time credits are conditional and apply only to non-disqualified offenses.
Inmates who meet both standards stack the relief. The combined effect is the difference between a release calendar driven entirely by the sentencing judge and one that the BOP, programming staff, and the inmate jointly shape.
The U.S. Sentencing Commission received Bureau of Prisons data on 18,084 individuals released from federal custody in calendar year 2024 after FSA time credits were applied, 17,894 of them with complete time-credit data.[1]
That is the largest-volume sentence reduction mechanism in federal correctional history.
How Are First Step Act Earned Time Credits Calculated?
Under 18 U.S.C. § 3632(d)(4), eligible inmates earn 10 days of FSA time credits for every 30 days of successful participation in evidence-based recidivism reduction programming or productive activities.[2]
Inmates assessed as minimum or low recidivism risk on two consecutive PATTERN assessments earn an additional 5 days per 30. That brings the maximum to 15 credit-days for every 30 program-days.
The arithmetic matters. Two inmates serving the same sentence can come out months apart depending on programming history and PATTERN scores.
A medium-risk inmate completing the full programming menu earns the base 10 days per 30. The same inmate, after dropping to low risk on two assessments in a row, earns 15 days per 30. Across a five-year sentence, that gap can grow into several months of additional credit.
Base credit: 10 days per 30 days of programming
The base rate is not automatic. The inmate must be enrolled in an approved program and successfully complete the participation period. Disciplinary infractions and refusal to participate suspend accrual.
The BOP tracks accrual in 30-day blocks tied to the FSA Conditional Placement Date worksheet. A partial month of programming usually does not produce a partial credit until the next full block.
Low-risk bonus: an additional 5 days per 30
The +5-day bonus requires two consecutive PATTERN assessments at minimum or low risk. PATTERN reassessments occur approximately every six months.
The earliest most inmates qualify for the bonus is around the one-year mark, assuming both early assessments come back at low or minimum. That is why early programming and clean conduct in year one have outsized effects on the total credit ceiling.
How Many FSA Credits Actually Apply to Early Release?
The statutory cap on FSA time credits applied to early release from secure custody is 365 days. The remaining credits are applied to prerelease custody under 18 U.S.C. § 3624(g)(2).
The 365-day cap is the single most important number in any FSA calculation. It determines how much of an inmate’s earned credit shows up as early release versus prerelease placement.
For inmates who meet the statutory criteria, the BOP applies up to 365 days of FSA credits to early transfer to supervised release. The clearest statutory bar is a final order of removal under § 3624(g)(1)(D).
The BOP has also treated immigration detainers and unresolved charges as obstacles to applying credits, but that practice is contested. In Williams v. FCI Berlin (2025), a federal court held the BOP cannot deny prerelease placement based on a detainer alone, because Congress disqualified only those with a final order of removal.
From the consultant sideThe 365-day cap is where defendants and families lose the most ground without realizing it. Inmates who could have earned 540 days of FSA credits often see only 365 applied to release, with the rest applied to halfway-house placement.
That math only holds if the BOP’s calculation is current and accurate. An outdated worksheet, a missed PATTERN reassessment, or an unresolved detainer can shift those numbers significantly.
For a related path that interacts directly with FSA timing, see our guide on how RDAP can reduce your federal sentence by up to 12 months.
Who Qualifies for First Step Act Time Credits?
Eligibility for FSA time credits is defined by what the inmate is not, more than by what they are. The statute lists 68 disqualifying offense categories at 18 U.S.C. § 3632(d)(4)(D), enumerated as clauses (i) through (lxviii).
These cover terrorism offenses, serious violent crimes, certain sex offenses, drug trafficking involving death or serious injury, and several specific firearms and weapons crimes.
If the offense of conviction falls within one of those 68 categories, the inmate cannot earn FSA credits regardless of conduct or programming.
Eligible offenses are everything else, which still covers the majority of the federal inmate population. The BOP uses the presentence investigation report and the judgment of conviction to make the determination.
That is one of the reasons the offense-conduct paragraphs of the PSR are far more consequential at the BOP than most defendants realize. The FSA classification depends directly on how the offense reads on paper.
For the upstream work that controls this, see our guide on what federal defendants must know before a presentence investigation.
What Is the PATTERN Risk Score and Why Does It Decide Your Release Math?
The Prisoner Assessment Tool Targeting Estimated Risk and Needs (PATTERN) is the Department of Justice risk assessment used by the BOP to classify every federal inmate into minimum, low, medium, or high recidivism risk.
Two consecutive minimum or low assessments unlock the +5-day FSA bonus. A medium or high score caps an inmate at the base 10-day rate, sometimes for years.
PATTERN uses gender-specific cutpoints and weighs factors that include prior criminal history, infraction record, age, and programming participation.
The system is recalibrated periodically. Inmates who score medium on one assessment can shift to low on the next without anything visibly changing about their case.
The score is also the gateway to halfway house and home confinement consideration under 18 U.S.C. § 3624(c). The BOP is required to prioritize lower-risk inmates for community placement.
How Do FSA Credits Convert Into Halfway House and Home Confinement?
FSA credits above the 365-day early-release cap apply to prerelease custody under the BOP’s authority in 18 U.S.C. § 3624(g)(2).
The two prerelease custody options are residential reentry centers, commonly called halfway houses, and home confinement.
Residential reentry center placement may extend up to 12 months under the Second Chance Act framework. Home confinement may extend up to the shorter of 10% of the sentence or 6 months under § 3624(c)(2).
The First Step Act added a directive that the BOP place lower-risk prisoners in home confinement “to the extent practicable.” That is why PATTERN scoring is so consequential in the final stretch of a sentence.
From the consultant sideMost families discover the distinction between the 365-day early release cap and the prerelease custody application late. By the time the BOP issues the FSA Conditional Placement Date worksheet, the math is largely set.
Active engagement with the unit team in the year before projected placement is the single best predictor of getting the maximum allowable home confinement portion under § 3624(c)(2).
Defendants who treat their unit team as a procedural box rather than a strategic relationship leave weeks of community placement on the table.
Good Conduct Time Under the First Step Act: 54 Days, Not 47
Before the First Step Act, the BOP awarded 47 days of good conduct time per year of imprisonment. It interpreted the statute against time served rather than time imposed.
The First Step Act fixed that interpretation. Under amended 18 U.S.C. § 3624(b), eligible inmates now earn up to 54 days of good conduct time for every year of the sentence imposed.
The recalculation was retroactive. On July 19, 2019, the Department of Justice announced the release of roughly 3,100 inmates whose recalculated good-time credits had moved their release dates into the past.
The change adds up. A defendant serving a 10-year sentence sees a 70-day swing simply from the GCT correction, with 540 GCT days under FSA versus 470 under the old interpretation.
The Federal Register rule on GCT credit under the First Step Act (2022) sets out how the calculation handles partial years.[4]
How Do FSA Credits Stack With RDAP and Other Programs?
The Residential Drug Abuse Program is a separate sentence-reduction authority under 18 U.S.C. § 3621(e)(2)(B).
RDAP can take up to 12 months off the sentence for non-violent offenders who complete the residential phase and the community-based transitional drug abuse treatment.
RDAP and FSA credits are not mutually exclusive. Inmates who qualify for both can stack them.
The interaction matters most at sentencing and during the early months in custody. RDAP placement is competitive, and the application timing affects when programming begins.
The difference between starting RDAP at month six versus month eighteen can shift the entire FSA credit accrual curve. Eligibility for RDAP is itself heavily dependent on the PSR documenting a verifiable substance abuse history during the year before arrest.
For a focused walkthrough, see our guide on how RDAP can reduce your federal sentence by up to 12 months.
Why Do So Many Eligible Inmates Lose FSA Credits They Earned?
The most common reason inmates lose FSA credits is not legal disqualification. It is administrative drift.
The credit worksheet falls out of date, the unit team is short-staffed, a detainer is misclassified, or a PATTERN reassessment is missed. The credits exist on paper but are not applied.
Defendants discover this only when the projected release date does not move.
The BOP’s July 2025 launch of an FSA Task Force was a response to exactly this pattern. The task force was created to accelerate FSA earned time credit calculations and the application of credits to community-placement and release dates.
The BOP’s Federal Time Credit Application Guide, published in October 2025, formalized how inmates and counsel can verify the calculation.[5]
The guide is the single most useful BOP-issued document for families trying to audit a release date.
What Do the FSA Numbers Look Like for a Typical Federal Defendant?
Worked example: 84-month sentence, FSA-eligible
Take a defendant sentenced to 84 months for an FSA-eligible offense, designated to a low-security FCI, with clean disciplinary conduct and consistent programming.
Good conduct time under amended § 3624(b) returns 378 days. FSA credits at the maximum 15-day-per-30 rate would, over the full sentence, earn close to 1,260 days. That 1,260-day figure is a theoretical ceiling, reachable only if the inmate earns the 15-day rate for the entire sentence, which requires two consecutive low or minimum PATTERN scores before the bonus begins.
The statutory cap applies 365 of those days to early release and the rest to prerelease custody.
The same defendant, scoring medium on PATTERN for the first half of the sentence, earns only the base 10-day rate during that window. The low-risk bonus applies only for the back half.
That single PATTERN trajectory can shift total credit by 200 to 300 days. The fastest way to model an individual case is to pull the inmate’s FSA Conditional Placement Date worksheet and walk the math against current programming records.
What Did the 2025 BOP Reforms Actually Change?
Two operational changes matter. The FSA Task Force, launched in July 2025, was tasked with clearing the backlog of FSA credit calculations and accelerating the application of credits to release dates.
The BOP also designated the FSA Conditional Placement Date (FCPD) worksheet as the authoritative anchor for unit team release decisions, replacing inconsistent local practices.
The practical effect is that families and counsel can now point to a single document when challenging a release date. The FCPD worksheet shows credit accrual, the application breakdown between early release and prerelease custody, and the projected dates.
Inmates who request a copy at every unit team meeting catch errors that would otherwise compound for months. Defendants going into custody in late 2025 and 2026 should expect this worksheet to drive most of the visible calculation work.
Want help auditing a specific BOP release-date calculation? The first consultation is free and confidential.
Frequently Asked Questions
How much time can the First Step Act take off a federal sentence?
The statutory cap is 365 days of early release credit under 18 U.S.C. § 3624(g)(3), plus additional credits applied to prerelease custody under § 3624(g). Stacked with the 54-day-per-year good conduct time and a possible RDAP year, total relief on an FSA-eligible sentence can exceed two years.
Who is disqualified from earning FSA time credits?
The 68 offense categories enumerated at 18 U.S.C. § 3632(d)(4)(D) are disqualifying. These include terrorism, serious violent crimes, certain sex offenses, drug trafficking with death or serious injury, and specific firearms offenses. Separately, a final order of removal bars credits from being applied to early release under § 3624(g)(1)(D); a detainer alone is not a statutory disqualifier, though the BOP’s handling of detainers was litigated in 2025.
What is the PATTERN risk score and how often is it updated?
PATTERN is the BOP’s recidivism risk assessment. It classifies inmates as minimum, low, medium, or high risk using gender-specific cutpoints. Reassessments occur approximately every six months. Two consecutive minimum or low PATTERN scores unlock the +5-day FSA credit bonus, raising the rate from 10 to 15 days per 30 program-days.
Are FSA credits and RDAP credits the same thing?
No. FSA credits are governed by 18 U.S.C. § 3632(d)(4) and require programming participation. RDAP is governed by 18 U.S.C. § 3621(e)(2)(B) and can take up to 12 months off the sentence for non-violent offenders who complete the residential program. Inmates who qualify for both can stack them.
How do I check my own FSA time credit calculation?
Request the FSA Conditional Placement Date (FCPD) worksheet from the unit team at every meeting. The BOP’s Federal Time Credit Application Guide (October 2025) explains how the calculation works. Families and counsel can audit the worksheet for missed programming credits or PATTERN reassessment errors.
Conclusion: The First Step Act Is a Calendar Problem, Not Just a Law
The First Step Act is best understood not as a single rule but as a calendar. The release date you receive at sentencing is the starting point.
PATTERN scores, programming completion, FSA credit accrual, the 365-day cap, the GCT recalculation, halfway house placement, and home confinement under § 3624(c) all move that date forward or hold it in place.
The defendants who get the most relief are not the ones who fight the loudest at sentencing. They are the ones whose advisors mapped the FSA math early and audited the BOP’s calculation every step of the way.
If you or a family member is facing federal sentencing, in custody, or staring at a release date that does not move, the FSA worksheet is the document to start with.
The first consultation is free and confidential. Request a free prison consultation, or learn more about how a federal prison consultant works alongside your attorney.
For deeper reading on the upstream work that controls FSA classification and stacking, see our guides on what federal defendants must know before a presentence investigation, how RDAP can reduce your federal sentence by up to 12 months, and why federal sentence reduction requests need expert planning.
Sources
- U.S. Sentencing Commission, First Step Act Earned Time Credits (calendar year 2024 data).
- 18 U.S.C. § 3632(d)(4), First Step Act earned time credits.
- BOP Program Statement 5410.01, First Step Act of 2018: Time Credits.
- Federal Register, Final Rule on Good Conduct Time Credit under the First Step Act (2022).
- Federal Bureau of Prisons, Federal Time Credit Application Guide (October 2025).