In the federal system, medium custody in prison means an inmate is housed at a medium security Federal Correctional Institution, a facility that sits between low and high security with reinforced perimeters, cell-based housing, controlled internal movement, and a higher staff-to-inmate ratio than lower-security prisons. Inmates there can still work, take classes, and participate in treatment programs, but their days run on tightly scheduled counts and designated movement times. The Bureau of Prisons uses a point-based assessment to assign someone to this level, and the classification carries real consequences for programming access and for how earned time credits translate into earlier release.
Security Level and Custody Level Are Not the Same Thing
People use “medium custody” and “medium security” interchangeably, and in casual conversation that’s fine. Inside the Bureau of Prisons, they describe two different things.
Security level refers to the institution. BOP facilities run from Minimum (camp) through Low, Medium, and High, and each level has distinct physical features and staffing. Custody level refers to the individual inmate and how much supervision they need. The BOP assigns each inmate a custody level of Community, Out, In, or Maximum based on criminal history, current offense, and behavior while incarcerated.1Federal Bureau of Prisons. Inmate Security Designation and Custody Classification
Most inmates at a medium security institution hold “In” custody. That means they can participate in work and programs inside the secure perimeter but cannot leave it. An inmate who earns “Out” custody at the same facility may be eligible for work assignments outside the perimeter with intermittent staff supervision. When someone says they’re in medium custody, in practice they almost always mean they’re housed at a medium security prison, with their individual custody assignment inside that prison setting the day-to-day privileges.
What a Medium Security Facility Looks Like
Medium security Federal Correctional Institutions have strengthened perimeters, usually double fences with electronic detection systems, and mostly cell-type housing rather than open dormitories.2Federal Bureau of Prisons. Federal Prisons Cells are typically shared with one other person. That setup gives staff more control over movement and limits unsupervised group interaction compared with the dormitory housing common at camps and low security facilities.
Internal controls are tighter and the staff-to-inmate ratio is higher than at low security prisons.2Federal Bureau of Prisons. Federal Prisons Inmates move on controlled schedules and must be present for official standing counts multiple times each day. Recreation, meals, and programming happen in designated areas during designated hours. Compared to a camp, where inmates might walk relatively freely within a perimeter that may not even have a fence, medium security feels considerably more restrictive.
Daily Life Inside
Days start early. Inmates wake for breakfast and then report to a work assignment or an education program. Movement between areas is controlled. Everything stops for standing counts. Recreation runs during specific hours in specific spaces, such as a gym or outdoor yard. Evenings include some unstructured time before inmates are locked in their cells for the night.
Programming is a central part of life at a medium security prison, and participation does more than fill the day. The Bureau assesses needs across 13 areas, including education, substance abuse treatment, mental health, anger management, parenting, employment readiness, and financial literacy.3Federal Bureau of Prisons. First Step Act Approved Programs Guide Available offerings include the Bureau Literacy Program, occupational education, the Non-Residential Drug Abuse Program, and the Residential Drug Abuse Program. Completing these programs feeds directly into an inmate’s risk classification and their eligibility for earned time credits under the First Step Act.
Medical care follows a tiered system. Every institution and every inmate is assigned a care level based on what the facility can provide and what the inmate actually needs. Routine issues are handled on-site, and inmates with complex or chronic conditions may be placed at institutions with higher care capability.4Federal Bureau of Prisons. Care Level Classification for Medical and Mental Health Conditions or Disabilities
How the Bureau of Prisons Decides Someone Belongs at Medium
After sentencing, the Bureau of Prisons has sole authority to decide where a federal inmate serves their sentence. Federal law directs the BOP to consider the resources of the facility, the nature and circumstances of the offense, the history and characteristics of the prisoner, and any recommendation from the sentencing judge.5Office of the Law Revision Counsel. 18 USC 3621 – Imprisonment of a Convicted Person
The BOP translates those statutory factors into a specific designation using a point-based instrument called the BP-337. Scoring covers offense severity, criminal history, escape history, age, education, and substance abuse history. Younger inmates score higher. So do those without a high school diploma or GED. A history of escape or serious detainers adds significant points.1Federal Bureau of Prisons. Inmate Security Designation and Custody Classification
For male inmates, a total between 16 and 23 points corresponds to a medium security designation when no Public Safety Factors apply. Inmates who score lower can still land in medium if certain Public Safety Factors are present, such as a history of involvement with a disruptive group, sex offense convictions, or threats against government officials. A maximum of three Public Safety Factors can be applied, and they can push an inmate with a low raw score into a higher security level than the number alone would produce.1Federal Bureau of Prisons. Inmate Security Designation and Custody Classification The BOP also weighs medical needs, available bed space, proximity to the inmate’s release residence, and separation requirements.6Federal Bureau of Prisons. Designations
State systems use their own classification frameworks, and the labels and scoring criteria differ. The general concept is the same: a standardized assessment produces a risk score that determines how much supervision an inmate requires.
Visits, Phone Calls, and Messaging
Federal law guarantees at least four hours of visiting time per month, and most institutions provide more. Medium security facilities generally hold visiting hours on weekends and holidays, with some offering weekday sessions. The warden can restrict visit length or the number of simultaneous visitors to manage overcrowding, so checking the specific facility’s posted schedule before traveling matters.7Federal Bureau of Prisons. How to Visit a Federal Inmate
Inmates participating in First Step Act programming receive 300 free phone minutes per month.8Federal Bureau of Prisons. FBOP Updates to Phone Call Policies and Time Credit System They also have access to the TRULINCS electronic messaging system, which allows email-like messages with approved contacts. Most facilities impose a 30-minute or one-hour session limit on the messaging terminals, after which the system logs the user off and they have to wait before signing back on.
Moving Down (or Up) a Security Level
A classification is not permanent. Federal regulations require the BOP to conduct a program review for every inmate at least once every 180 days. When an inmate is within 12 months of their projected release date, reviews happen at least every 90 days.9eCFR. 28 CFR 524.11 – Process for Classification and Program Reviews
At each review, the unit team re-evaluates the custody score based on institutional behavior, program participation, and any discipline since the last review. Consistent good behavior, a clean record, and active engagement in recommended programs can lower the score and eventually support a transfer to a lower-security facility. Staff have discretion. The point total does not dictate the outcome by itself; the team is permitted to exercise professional judgment within the scoring guidelines.1Federal Bureau of Prisons. Inmate Security Designation and Custody Classification
Movement can go the other direction. Disciplinary infractions, involvement in violence, or other serious rule violations raise the risk score and can produce reclassification to a higher level, placement in a Special Housing Unit, loss of privileges, and transfer to a more restrictive institution.
Why Medium Classification Matters for Earned Time Credits
The First Step Act, passed in 2018, created a system of earned time credits that rewards participation in rehabilitation programming. Every eligible inmate who successfully participates in approved recidivism reduction programs or productive activities earns 10 days of credit for every 30 days of participation.10Office of the Law Revision Counsel. 18 USC 3632 – Development of Risk and Needs Assessment System
Risk classification is where things get sharp. Inmates the BOP determines to be at minimum or low risk for recidivism, and who have maintained that level over two consecutive assessments, earn an additional 5 days per 30 days of participation, for a total of 15 days per month. Inmates classified as medium or high risk still earn the base 10 days but do not receive the bonus.10Office of the Law Revision Counsel. 18 USC 3632 – Development of Risk and Needs Assessment System
The bigger issue for medium-risk inmates is applying those credits. To transfer into prerelease custody or supervised release using earned time credits, an inmate’s general and violent risk categories must both be minimum or low.11Federal Bureau of Prisons. PATTERN Risk Assessment The BOP uses a tool called PATTERN (Prisoner Assessment Tool Targeting Estimated Risk and Needs) to assess and periodically reassess each inmate’s risk level. An inmate who enters medium security with a medium PATTERN score can still bank credits, but those credits only become usable for earlier release once the score drops to low or minimum through sustained program participation and good behavior. Reducing that score is often the single most consequential thing a medium-risk inmate can do toward an earlier release.
Not every inmate is eligible regardless of risk level. The statute lists dozens of specific offenses, primarily violent and sex-related crimes, that disqualify an inmate from earning time credits entirely. Inmates subject to a final deportation order can earn credits but cannot apply them toward early release.10Office of the Law Revision Counsel. 18 USC 3632 – Development of Risk and Needs Assessment System