FREE TOOL — INDEPENDENT ESTIMATE
FSA Time Credits Calculator
Enter the sentence and programming details to build an independent estimate of good conduct time, First Step Act credits, and the resulting dates — then hold it up against the BOP’s official computation. A gap of weeks or months is exactly the discrepancy worth putting in writing.
ESTIMATE ONLY — NOT THE OFFICIAL BOP COMPUTATION · EDUCATIONAL, NOT LEGAL ADVICE
Leave 0 to auto-estimate continuous programming for the time served.
ESTIMATED TIME LEDGER
How the math works. Good conduct time accrues at up to 54 days per year of the sentence imposed (18 U.S.C. §3624(b)). FSA credits accrue at 10 or 15 days per 30 days of successful programming (§3632(d)(4)); up to 365 credits apply toward earlier release, and credits beyond 365 apply toward prerelease custody — halfway house or home confinement — with no statutory cap (§3624(g)). RDAP completion can reduce eligible sentences by up to 12 months (§3621(e)).
This is an estimate, not the official computation. The BOP’s calculation controls, and real-world factors — eligibility exclusions, PATTERN changes, disciplinary losses, detainers, program interruptions, and application conditions — all move actual dates. Use this tool to spot discrepancies worth questioning, then verify with the official records. See how to check a release date and the miscalculation playbook.