Residential Drug Abuse Program (RDAP): Eligibility, Sentence Reduction, and How It Works

What RDAP Is

The Residential Drug Abuse Program (RDAP) is the Bureau of Prisons' most intensive substance use treatment program. It consists of approximately 500 hours of cognitive-behavioral programming delivered in a dedicated residential unit over roughly 9 to 12 months, followed by transitional drug abuse treatment (TDAT) in the community.

Who this guide is for

• Individuals awaiting designation or currently in BOP custody who want to understand whether RDAP may be an option
• Family members trying to understand how RDAP could affect a projected release timeline
• Attorneys reviewing post-sentencing planning considerations alongside legal strategy

Who Is Eligible

Eligibility is determined by BOP Psychology Services, not the sentencing court. General criteria include:

• A verifiable substance use disorder documented within the 12 months before arrest
• A non-violent offense (violent offenses under 18 U.S.C. § 924(c) and certain other convictions are disqualifying under 28 C.F.R. § 550.55)
• U.S. citizenship or otherwise eligible for community placement under Program Statement 5162.05
• Sufficient time remaining on the sentence to complete the program
• Willingness to participate voluntarily

Immigration detainers, certain firearms enhancements, and specific prior convictions can disqualify an otherwise eligible individual. Screening is done through the Presentence Report (PSR), interviews, and supporting documentation.

The § 3621(e) Sentence Reduction

Successful RDAP completion by an eligible non-violent offender may result in a sentence reduction of up to 12 months under 18 U.S.C. § 3621(e). The reduction is not automatic and is not guaranteed to be 12 months. The actual reduction the BOP awards is tied to sentence length:

• Sentences of 30 months or less: up to 9 months off
• Sentences of 31 to 36 months: up to 12 months off (BOP discretion; often less)
• Sentences of 37 months or more: up to 12 months off

The BOP retains discretion to award a smaller reduction, or none at all, even after program completion.

How RDAP Stacks With First Step Act Credits

RDAP and FSA credits are separate mechanisms with different eligibility rules, and each can reduce the prison portion of a sentence by up to 12 months. Neither is guaranteed.

• RDAP (§ 3621(e)) reduces the sentence itself.
• FSA earned time credits are applied first toward supervised release, up to a 12-month cap. Any FSA credits earned beyond that 12-month cap may be applied toward additional community custody — halfway house or home confinement time.

Individuals who complete RDAP and also earn substantial FSA credits can see meaningful reductions in institutional time and expanded community placement. The exact combination depends on offense, PATTERN score, programming completed, and BOP determination.

If you want to estimate how the First Step Act affects your federal sentence — including disqualifying offenses and earned time credits — run your numbers through our FSA BOP calculator.

Interaction With Good Conduct Time

Good Conduct Time (up to 54 days per year under the First Step Act) accrues independently based on institutional conduct and is not affected by RDAP participation.

Halfway House and Home Confinement After RDAP

RDAP graduates typically receive transitional drug abuse treatment in a Residential Reentry Center (halfway house). This community-based follow-up is separate from the § 3621(e) reduction and is governed by the Second Chance Act and 18 U.S.C. § 3624(c).

How to Request Consideration

• Ensure substance use history is documented in the PSR before sentencing
• Request RDAP consideration at initial BOP classification
• Follow up with the unit team and Psychology Services after designation
• Understand that placement at an RDAP-designated facility is required to participate

Common Misconceptions

• “Everyone gets 12 months off.” The reduction is up to 12 months and is discretionary.
• “RDAP is available at every facility.” It is offered at designated institutions only.
• “I can self-diagnose to qualify.” Eligibility requires verifiable documentation reviewed by BOP Psychology Services.
• “RDAP and FSA credits cancel each other out.” They are separate mechanisms and can both apply.