House arrest works by confining you to your home under a court order, with an electronic monitor tracking your location, in place of some or all of the time you would otherwise spend in jail or prison. A judge sets the rules: where you live, when you can leave, what you can leave for, and who verifies it. Break those rules and you can end up behind bars after all. The framework is roughly the same in state and federal courts, though the fees, technology, and paperwork vary.
When a Court Orders House Arrest
House arrest shows up at three points in a criminal case.
Before trial, a judge can order it as a condition of bail when releasing someone outright feels too risky but jailing them pretrial seems excessive. In the federal system, courts must impose the least restrictive conditions that will reasonably ensure the defendant appears in court and doesn’t endanger the community, which can include travel restrictions, curfews, and GPS or electronic monitoring. Pretrial release eligibility cannot be conditioned on your ability to pay.
At sentencing, house arrest is most commonly imposed as a condition of probation. Federal felony probation must include at least one discretionary condition from a statutory list, and that list specifically includes community confinement and residency restrictions.1Office of the Law Revision Counsel. 18 USC 3563 – Conditions of Probation The judge issues a written order laying out every condition you must follow, tailored to the offense and your circumstances. The sentence must be “sufficient, but not greater than necessary” to serve the goals of punishment, deterrence, public safety, and rehabilitation.2Office of the Law Revision Counsel. 18 U.S. Code 3553 – Imposition of a Sentence Duration ranges from a few weeks to several years.
For federal inmates already serving time, home confinement can come at the tail end of a sentence. Federal law allows it for the shorter of 10 percent of the total sentence or six months near the end of the term, and the Bureau of Prisons is directed to maximize that time for lower-risk inmates.3Office of the Law Revision Counsel. 18 U.S. Code 3624 – Release of a Prisoner Prisoners who complete recidivism-reduction programs under the First Step Act can earn credits toward earlier transfer to home confinement, and the BOP can also place certain elderly and terminally ill prisoners on home confinement to finish their sentences.4Federal Bureau of Prisons. First Step Act Overview
Who Qualifies
Eligibility comes down to risk. Judges weigh the seriousness of the offense, your criminal history, ties to the community, employment, health, and family responsibilities. Nonviolent offenses and first-time offenders stand the best chance. A history of fleeing or a violent conviction cuts sharply the other way.2Office of the Law Revision Counsel. 18 U.S. Code 3553 – Imposition of a Sentence
A stable residence matters too. Everyone living in the home typically must agree to the arrangement, because monitoring equipment will be installed and officers may visit. The Bureau of Prisons has noted that household members need to be “supportive and willing to make the necessary sacrifices demanded by home confinement and electronic monitoring.”5Bureau of Prisons. Electronically Monitored Home Confinement
The Three Levels of Restriction
Not all house arrest looks the same. Federal courts recognize three levels, and most state systems follow a similar structure:
- Curfew. You must be home during set hours, such as 8 p.m. to 6 a.m., but can move freely the rest of the day. This is the least restrictive form.
- Home detention. You stay home at all times except for pre-approved absences: work, school, medical appointments, religious services, attorney visits, and court appearances.
- Home incarceration. The strictest level. You’re locked down 24 hours a day and can only leave for medical emergencies or specifically approved court appearances.6U.S. SDNY Probation. Location Monitoring Program
Someone sentenced for a low-level drug offense might get home detention with work release. A higher flight risk could face home incarceration.
What a Day Actually Looks Like
Under home detention, the most common level, you follow a court-approved schedule that accounts for every hour of the day. Leaving home for anything not on that schedule counts as a violation. Approved activities typically include commuting to and from work during set hours, attending school or job training, medical or mental health appointments, and meetings with your attorney or probation officer.
Every schedule change needs advance approval from your probation officer, and verbal requests usually don’t count. If something unexpected comes up, contact your officer immediately and get written or electronic confirmation of any adjustment. Showing up at a location that wasn’t pre-approved, or arriving home even a few minutes late, can trigger a violation alert.
Work
Most orders allow you to keep your job or find one, since maintaining employment is one of the reasons courts choose home confinement over jail. You’re generally restricted to a direct route between home and work with no unauthorized stops. Your employer may need to be notified of your status, and in some cases is asked to report if you don’t show up for scheduled hours. Changing jobs, adjusting your hours, or switching work locations all require your probation officer’s approval before the change takes effect.
Drug and Alcohol Testing
Substance bans are standard. Federal probation requires that you not possess any controlled substance and submit to drug testing, starting within 15 days of release and continuing periodically throughout supervision.1Office of the Law Revision Counsel. 18 USC 3563 – Conditions of Probation Testing can be random. A positive result is one of the triggers for mandatory revocation of probation in federal court.7Office of the Law Revision Counsel. 18 U.S. Code 3565 – Revocation of Probation Courts may also order substance abuse counseling.
How the Ankle Monitor Works
Two main technologies handle the tracking, sometimes in combination.
Radio frequency (RF) uses a base unit installed in your home that communicates with the ankle device. The system alerts your officer if you leave the residence outside your approved schedule, return late, or tamper with the equipment. RF confirms you’re inside the home but doesn’t track where you go when you leave for approved activities.
GPS is satellite-based and monitors your location continuously. Active GPS provides real-time data; passive GPS downloads your movement history at set intervals. Either way, it creates a detailed record of everywhere you’ve been.6U.S. SDNY Probation. Location Monitoring Program
The device is tamper-proof and must stay on your ankle for the entire program. You’ll typically need a landline or cell phone at your residence for communication with the monitoring system. Removing or tampering with the device is treated as a serious violation and can result in immediate arrest.
Equipment occasionally loses signal, runs low on battery, or glitches, and those malfunctions can look identical to a violation from the monitoring center’s perspective. Contact your probation officer immediately if anything seems wrong. Keeping the device charged is your responsibility, and letting the battery die is generally treated as your fault. Document communications about equipment issues in writing whenever possible.
What It Costs
In many jurisdictions, you’re on the hook for some or all of the monitoring costs. Fees vary widely but commonly include a one-time installation or setup fee and an ongoing daily or monthly charge. Daily fees across jurisdictions have been reported ranging from under a dollar to $40 per day, with GPS generally costing more than RF. Installation fees, where charged, typically fall between $25 and $250.
In the federal system, people on probation and supervised release pay a co-payment for location monitoring only if the court specifically orders it, and expenses not covered by a co-payment are covered by the government.8United States Courts. Costs and Payment of Expenses Incurred for Location Monitoring State and local programs handle fees differently. Some jurisdictions offer reductions or waivers for financial hardship, but the process varies. Raise affordability with your attorney or the court before you begin, because falling behind on payments can itself become a compliance problem.
Rights You Keep on House Arrest
You don’t lose all constitutional protections just because you’re wearing an ankle monitor. The Supreme Court ruled in 2015 that attaching a GPS device to a person to track their movements is a search under the Fourth Amendment.9Justia. Grady v. North Carolina, 575 U.S. 306 (2015) Monitoring itself isn’t unconstitutional, but courts must balance surveillance against your privacy.
Regular law enforcement generally still needs a warrant to search your home. Your probation or parole officer operates under a lower standard, and some courts have allowed correctional officers acting on their own initiative to conduct searches based on reasonable belief rather than probable cause. Searches requested by police and carried out through a probation officer to get around warrant requirements have been struck down by courts as unlawful.
Your GPS data creates a detailed map of your movements for the duration of monitoring, and that data is accessible to your supervising officer and, depending on the jurisdiction, potentially to other law enforcement agencies.
What Happens If You Break the Rules
Violations split into two categories, and the distinction matters.
Technical Violations
A technical violation means you broke a condition without committing a new crime. Arriving home 20 minutes late, missing a check-in, or letting the ankle monitor’s battery die all count. A first offense might draw a warning, stricter conditions, extra programming, or an extended supervision period. Repeated or willful technical violations can escalate to short-term jail or full revocation.
Substantive Violations
A substantive violation means you committed a new crime while on house arrest. Courts treat these far more seriously. In the federal system, some substantive violations trigger mandatory revocation: possessing a controlled substance, possessing a firearm in violation of federal law, or testing positive for drugs more than three times in a year all require the court to revoke probation and impose a sentence that includes imprisonment.7Office of the Law Revision Counsel. 18 U.S. Code 3565 – Revocation of Probation
The Hearing
When a violation is detected, your probation officer reports it to the court. You’re entitled to a hearing where the judge considers the circumstances, including severity, frequency, and the original sentencing factors. The court can continue house arrest with modified conditions, extend the term, or revoke it entirely and resentence you to prison.7Office of the Law Revision Counsel. 18 U.S. Code 3565 – Revocation of Probation The power to revoke extends beyond the expiration of your probation term if a warrant or summons was issued before the term ended.
When House Arrest Ends
Completing house arrest doesn’t always mean you’re done with supervision. Depending on your original sentence, you may transition to standard probation or supervised release. Federal supervised release can last up to five years for serious felonies and up to one year for misdemeanors.10Office of the Law Revision Counsel. 18 USC Part II, Chapter 227, Subchapter D – Imprisonment During that time, your probation officer monitors your conduct, may require regular check-ins, and reports your progress to the court.11GovInfo. 18 USC 3603 – Duties of Probation Officers Restitution and fines from your original sentence continue after house arrest ends.