For someone in federal prison, a missing month of credit can mean another month away from family, employment, and the opportunity to rebuild. Yet understanding a Bureau of Prisons sentence calculation often requires sorting through several dates and different types of credit. A recent regulatory change makes that review particularly important for people who spent time awaiting transportation after their federal sentences began.
What the New Rule Changes
Effective September 30, 2026, the BOP amended its First Step Act regulation to remove language tying the beginning of credit eligibility to arrival at the designated institution. The revised regulation instead looks to when the person’s term of imprisonment commences.
That distinction matters. An eligible person awaiting transportation after the federal sentence begins may have an opportunity to earn credits before reaching the designated prison. However, the rule expressly explains that sentencing alone does not automatically generate credits: qualifying programming or productive activity remains necessary. See: First Step Act Time Credits—Revisions, 91 Fed. Reg. 55,740 (Aug. 31, 2026).
Earning Credits and Applying Credits Are Different Questions
The First Step Act generally provides eligible prisoners with 10 days of credit for every 30 days of successful participation in qualifying programming or productive activities. An additional five days may be earned when the statutory low- or minimum-risk assessment requirements are satisfied. The statute excludes certain convictions and does not authorize credits for detention before the sentence commences. See: 18 U.S.C. § 3632(d)(4).
Those credits also differ from good conduct time. FSA credits may support transfer to prerelease custody or an earlier start to supervised release, subject to statutory conditions. Early transfer to supervised release is limited to 12 months. Halfway-house placement, home confinement, and supervised release therefore should not be treated as interchangeable dates on a calendar. See: 18 U.S.C. § 3624(b), (c), (g).
Where to Begin When the Calculation Looks Wrong
A meaningful review starts with the records. Obtain the current sentence computation, available FSA credit assessment, risk assessments, program records, and a timeline showing sentencing, custody, transportation, and arrival dates.
Then identify the actual disagreement. Is a period missing? Was an earning rate applied incorrectly? Were credits earned but not applied? Is the disputed date a projected release date or a community-placement date?
For someone affected by the new rule, a focused request would identify the period between sentence commencement and arrival at the designated institution and ask how that period was evaluated. The request should address qualifying participation rather than assume that every day in custody earns credit.
Put the Dispute in Writing
Keep copies of requests, supporting records, responses, and appeals. A written explanation makes it easier to determine whether the disagreement concerns the underlying dates, eligibility, participation, or application of credits.
The BOP’s administrative appeal process provides review beyond the institution level, including regional and Central Office appeals. Applicable deadlines and submission requirements deserve close attention. See: 28 C.F.R. § 542.15.
A release calculation should be understandable and supported by the record. If you or your loved one believes FSA credits are missing, our office can assist with reviewing the available documents, identifying the disputed period, and evaluating the next steps.
This article provides general information and does not constitute legal advice. Eligibility and available relief depend on the individual record and applicable law.