An ankle monitor is a small electronic device worn around the ankle that lets courts and supervising agencies keep track of a person released into the community. Depending on the type, it can report a person’s location using GPS, confirm they are home during set hours, or detect alcohol through the skin. If your loved one has been ordered to wear one, this guide walks you through how they work, the rules that come with them, and how costs are usually handled.
What Is an Ankle Monitor?
An ankle monitor (also called an electronic monitor, EM device, or “ankle bracelet”) is part of a broader practice called electronic monitoring. Courts, probation and parole offices, and pretrial programs use these devices to supervise people outside of jail or prison. It is often used as a condition of bond, probation, parole, or house arrest, allowing someone to live at home, keep a job, or care for family while still being monitored.
Types of Ankle Monitors and What They Track
Not all ankle monitors do the same thing. The type someone wears depends on the court order and the supervising agency.
GPS Monitors
A GPS monitor tracks a person’s physical location, often in near real time. It can be used to enforce exclusion zones (places the person must stay away from, such as a victim’s home or a school) and inclusion zones (places they must remain, such as their residence). If the person enters or leaves a restricted area, the supervising agency is alerted.
Radio Frequency (RF) Monitors
RF monitors work with a base station in the home. Instead of tracking exact location, they confirm whether the person is within range of the base unit during required hours. This type is common with home confinement and curfew conditions.
SCRAM and Alcohol Monitors
A SCRAM device (Secure Continuous Remote Alcohol Monitor) measures alcohol through perspiration on the skin at regular intervals. These are frequently ordered in cases involving alcohol-related offenses. Some devices combine alcohol monitoring with location tracking.
Who Has to Wear One?
People may be ordered to wear an ankle monitor at several stages of the justice system, including:
- As a condition of pretrial release or bond while a case is pending
- As part of probation instead of, or in addition to, jail time
- As a condition of parole after release from prison
- During house arrest or home confinement
- In some juvenile and immigration supervision programs
The decision is usually made by a judge or a supervising agency, and the specific rules are written into the court order.
Common Rules for People on Ankle Monitors
Rules vary by program, but people wearing a monitor are typically expected to:
- Keep the device charged, since a dead battery can look like a violation
- Stay within approved locations and honor any curfew hours
- Avoid tampering with, removing, or damaging the device
- Get advance approval for travel, medical appointments, or schedule changes
- Stay in regular contact with the supervising officer
Violating these conditions, or removing the device, can lead to serious consequences, including being returned to custody.
How Much Do Ankle Monitors Cost?
Costs vary widely depending on the jurisdiction, the type of device, and the program. In many jurisdictions the person being monitored is required to pay a setup fee plus a daily or monthly supervision fee, though some programs cover part or all of the cost, and some offer reduced fees based on ability to pay. Because pricing differs so much from place to place, it is best to ask the supervising agency directly. For a fuller breakdown, see our guide on how much an ankle monitor costs per month.
Frequently Asked Questions
Can an ankle monitor be removed for showering or work?
Most GPS and RF ankle monitors are designed to be worn continuously, including in the shower, and are water resistant. They are generally not meant to be removed by the wearer. Any removal usually requires authorization from the supervising agency.
Does an ankle monitor track everything I say?
Standard location and alcohol monitors track location or alcohol levels, not conversations. Some newer devices can include two-way communication features, so it is worth asking the supervising agency exactly what a specific device does.
What happens if the battery dies?
A dead battery can interrupt monitoring and may be treated as a possible violation. Wearers are usually expected to charge the device daily and report any technical problems right away.
Can you travel while wearing an ankle monitor?
Travel is usually limited and often requires prior approval from the supervising officer, especially for GPS devices with location restrictions. Always ask before making plans.
Is an ankle monitor the same as house arrest?
Not exactly. An ankle monitor is a tool, while house arrest is a sentence or condition that often uses a monitor to enforce it. Someone can wear a monitor without being fully confined to their home.
Policies, fees, and rules around ankle monitors vary by jurisdiction and program. Always confirm the specific requirements with the facility, the supervising officer, or a qualified attorney. This article is for general information only and is not legal advice. For more on staying connected during supervision, see our guide on how to visit an inmate.
