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How Does Federal Good-Conduct Time Work?

Sentenced • Federal custody Last reviewed: September 4, 2026

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Short answer

Good-conduct time is a possible sentence reduction administered by the Bureau of Prisons for qualifying federal sentences. Eligible people may earn up to 54 days for each year of the sentence imposed. The common description of this as fifteen percent off is shorthand, not the rule, and good-conduct time is separate from First Step Act Time Credits. CaseSteps does not calculate good-conduct time or estimate release dates; the Bureau of Prisons computes sentences, and counsel can explain a specific situation.

Attorney review pending. This is general education, not legal advice.

Plain-English overview

Good-conduct time is a possible reduction administered by the Bureau of Prisons. Under 18 U.S.C. § 3624(b)(1), it applies to a term of imprisonment of more than one year, other than a term of life imprisonment. Eligible people may receive up to 54 days for each year of the sentence imposed, subject to a Bureau of Prisons determination that the person displayed exemplary compliance with institutional disciplinary regulations during that year. The Bureau may award less than 54 days, or no credit, when it determines that the required standard was not met.

People frequently describe this as “15% off” but that is shorthand—not the actual rule. Fifty-four days is approximately 14.8% of a 365-day year, no reduction is automatic, and CaseSteps does not calculate any sentence or release date.

Example

For a five-year sentence, 54 days multiplied by five years equals a maximum of 270 days of good-conduct time. This is only a general illustration. It is not a personal release-date calculation and does not account for every factor affecting sentence computation.

Important distinction

Good-conduct time is different from First Step Act Time Credits. Good-conduct time can affect the amount of time served on the sentence. First Step Act Time Credits are earned through successful participation in qualifying programs or productive activities and are subject to separate eligibility and application rules.

Both are also separate from Second Chance Act prerelease placement, which concerns where the final portion of a sentence may be served, and from the separate statutory benefit associated with the Residential Drug Abuse Program under 18 U.S.C. § 3621(e). Four different rules, four different decisions.

Questions to discuss with counsel or appropriate BOP staff

  • Is this sentence eligible for good-conduct time?
  • How is the projected release date being calculated?
  • Has prior-custody credit been calculated separately?
  • Are disciplinary issues affecting good-conduct time?
  • Where can the official sentence computation be reviewed?

This is general federal legal education, not legal advice. Procedures and outcomes depend on the facts, the controlling law, court orders and local practices. Confirm deadlines and decisions with qualified counsel.

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