RDAP time off calculator

Completing RDAP earns eligible nonviolent offenders up to 12 months of early release under 18 U.S.C. § 3621(e)(2)(B) — tiered by BOP policy at up to 6 months (sentences ≤ 30 months), 9 months (31–36), or 12 months (≥ 37).

This calculator layers the RDAP reduction onto Good Conduct Time and First Step Act credits in the order BOP applies them, and flags the eligibility exclusions in 28 C.F.R. § 550.55.

Free · instant · nothing stored

See their real dates

Sentence imposed
yrs
mos

Estimates only — not legal advice. BOP makes final determinations.

Reviewed against 18 U.S.C. § 3621(e), 28 C.F.R. § 550.55, and BOP Program Statements 5330.11 / 5331.02. Last updated .

What does the RDAP date depend on?

  • Early-release eligibility — the § 550.55 exclusions (violent offenses, firearm enhancements, disqualifying priors) decide whether the year off exists at all; details here.
  • Sentence length tier — 6 / 9 / 12-month maximums by sentence imposed.
  • Program timing — entry date plus ~9–12 months of program plus community treatment can compress the reduction if admission comes late; waitlists matter.
  • Interaction with FSA credits — RDAP itself earns FSA credits as an EBRR program; the calculator applies both without double-counting the same days.
The § 3621(e) reduction is discretionary and conditional until the last treatment phase completes. Treat every RDAP-adjusted date as a band, not a promise — the calculator displays it that way on purpose.

Frequently asked questions

How much time does RDAP take off a 60-month sentence?

Up to 12 months (the ≥ 37-month tier), on top of 270 days of Good Conduct Time and any First Step Act credits — plus the final months in community treatment at a halfway house or home confinement. Whether the full year survives depends on program timing and eligibility.

Does RDAP time off apply to violent offenses?

No — 28 C.F.R. § 550.55 excludes offenses BOP classifies as violent and drug offenses carrying firearm enhancements from the early release (the program itself remains open for treatment, and still earns FSA credits).

Can you calculate an RDAP date before admission?

Yes, as a scenario: the calculator assumes an entry date and shows how the reduction shrinks if entry slips. That's also the honest way to read any RDAP promise — against the waitlist at the person's facility.

Primary sources

Everything on this page is drawn from the statutes, regulations, and BOP program statements below — read them directly:

Keep reading

Estimates, not promises

This page describes federal law and Bureau of Prisons policy in general terms for education. It is not legal advice, it doesn't account for the facts of any individual case, and no attorney–client relationship is created by reading it. The BOP makes all final release-date determinations. Have an attorney review anything before you file it. Built by OutDate, the federal release date calculator.

RDAP time off calculator — § 3621(e) early release by sentence length · OutDate