---
title: "Good conduct time"
citation: "28 C.F.R. § 523.20"
authority_id: "AUTH-CFR-28-523-20"
authority_type: "regulation"
jurisdiction: "federal_nationwide"
precedential_status: "binding_regulation"
official_url: "https://www.govinfo.gov/content/pkg/CFR-2025-title28-vol2/pdf/CFR-2025-title28-vol2-sec523-30.pdf"
url: "https://jason93.com/legal/federal-process/authorities/AUTH-CFR-28-523-20/"
legal_review: "2026-08-24"
links_checked: "2026-10-15"
links_available: 1
links_checked_count: 1
license: "CC BY 4.0"
---

# 28 C.F.R. § 523.20

## Propositions supported

- Current sentence-imposed projection and changeable projected date.
- Partial-final-year proration and anniversary-period mechanics.
- Offense-date, literacy, disciplinary, and removal-order branches.
- Distinction between GCT and First Step Act time credits in the final-rule explanation.

## Material limitations

The current 2025 annual CFR text was cross-checked against the 2022 final rule. Parts 541 and 544 control procedures and definitions not reproduced here.

## Official sources

- 2025 annual CFR: <https://www.govinfo.gov/content/pkg/CFR-2025-title28-vol2/pdf/CFR-2025-title28-vol2-sec523-30.pdf>
- Final rule, 87 Fed. Reg. 7938: <https://www.federalregister.gov/documents/2022/02/11/2022-02876/good-conduct-time-credit-under-the-first-step-act>


## Used in

- [18 U.S.C. § 3624(b) — Good Conduct Time](https://jason93.com/legal/federal-process/modules/80-sentence-execution-and-bop/good-conduct-time.md)
- [Detainers, Prison Discipline, Good-Time Consequences, and RDAP](https://jason93.com/legal/federal-process/modules/80-sentence-execution-and-bop/detainers-discipline-and-rdap.md)