Ankle Monitor Rules: What You Need to Know

GPS ankle monitors track your exact location in real time using satellite signals, similar to the GPS in your phone. The device contains a GPS receiver, a cellular transmitter, and a tamper detection system. Your probation officer programs the device with inclusion zones (places you are allowed to be, like your home and workplace) and exclusion zones (places you must stay away from, like a victim's home or a school). If you leave an approved zone or enter a restricted one, an alert is sent immediately to the monitoring center. GPS monitors are the most common type for probation and parole.

RF (radio frequency) monitors work differently. Instead of tracking you everywhere, they verify that you are at a specific location — usually your home. A base unit is installed at your residence, and the ankle device communicates with it. If you leave the range of the base unit (typically 100 to 300 feet), an alert goes off. RF monitors are used mainly for curfew enforcement and home detention. They do not track where you go when you leave home — they only know whether you are home or not.

SCRAM (Secure Continuous Remote Alcohol Monitoring) bracelets test your blood alcohol level continuously by analyzing the sweat on your skin. The device takes readings every 30 minutes and transmits the data to a monitoring center. SCRAM bracelets do not have GPS — they only detect alcohol. They are typically ordered in DUI cases, domestic violence cases involving alcohol, or any situation where sobriety is a condition of release. Some hybrid devices combine GPS tracking with alcohol monitoring.

Charging is mandatory. GPS monitors typically need to be charged for at least 2 hours every day. Many people charge their device while sitting at a desk, watching TV, or sleeping — you just need to stay near a power outlet. If your battery dies, the monitoring center cannot verify your location, and that counts as a violation even if you were sitting at home the entire time. Set a daily alarm to remind yourself to charge.

Curfew and zone compliance are strictly enforced. Your probation officer will set specific hours when you must be at home and may designate places you cannot go. The device tracks these in real time. If you are even a few minutes late for curfew or accidentally drive past an exclusion zone, the system will flag it. If you know you need to be somewhere outside your approved schedule (a doctor's appointment, a job interview), get written permission from your probation officer in advance.

You must keep the device on your ankle at all times. Do not try to cover it, block its signal, or move it up or down your leg. The strap contains fiber optic sensors — if anyone cuts, stretches, or loosens it, the device sends an immediate tamper alert. In many states, tampering with an ankle monitor is its own criminal offense, punishable by additional jail time.

Stay in communication. If your device malfunctions, beeps unexpectedly, or if you have an emergency that might affect compliance (like a car breakdown that makes you late for curfew), call your probation officer or the monitoring center right away. Documenting the problem in real time looks much better than trying to explain it after the fact.

You can shower with an ankle monitor. Most devices are water-resistant and designed to handle daily showers without any problems. Use warm water and keep showers at a normal length — there is no need to wrap the device in anything or try to keep it dry.

Swimming is not allowed. While the device can handle brief water exposure, it is not designed for prolonged submersion. Pools, hot tubs, lakes, and oceans are off limits for several reasons: extended time underwater can degrade the seals and corrode connectors, chlorine and salt water can damage the electronics, and GPS and cellular signals are blocked underwater, which means the device cannot report your location. Submerging the device will likely be flagged as a tamper attempt.

Be careful with baths as well. A quick rinse is fine, but sitting in a full bathtub where the device is submerged for an extended period is risky. When in doubt, stick to showers.

Ankle monitor costs typically break down into two parts: an installation fee and a daily monitoring fee. Installation usually costs $50 to $100. Daily monitoring fees range from about $5 to $25 per day depending on the type of device and your location. GPS monitors tend to cost $10 to $15 per day. SCRAM alcohol monitors cost about $10 to $12 per day for alcohol-only monitoring, or $13 to $15 per day for combined alcohol and location monitoring. Over a full year, that can add up to $3,600 to $9,000 or more.

In most cases, the person wearing the monitor is expected to pay. This is one of the hardest parts of electronic monitoring — many people are ordered to wear a monitor precisely because they cannot afford bail, and then they are charged daily fees they also cannot afford. Some people end up back in jail not because they violated any rule, but because they fell behind on monitor payments.

If you cannot afford the fees, you have options. Many courts and monitoring companies offer fee waivers or sliding-scale rates for people who are indigent (unable to pay). Ask your attorney to file a motion requesting a fee reduction or waiver. Under Bearden v. Georgia (1983), the Supreme Court ruled that you cannot be jailed solely for inability to pay — this applies to monitor fees as well. Some states have specific laws capping monitor fees or requiring courts to assess ability to pay before ordering electronic monitoring. Do not just stop paying without telling anyone — communicate with your probation officer and the court about your financial situation.

Dead battery. If the device runs out of power, the monitoring center loses your location data. This is treated as a violation regardless of where you actually were.

Tamper alert. Any attempt to cut, stretch, loosen, or remove the strap triggers an immediate alert. Even accidental damage to the strap (like catching it on something) can set off the tamper sensor.

Zone violation. Entering an exclusion zone or leaving your inclusion zone outside approved hours will generate an alert. This includes accidentally driving through a restricted area.

Curfew violation. Being away from your approved location during curfew hours, even by a few minutes, is flagged.

Signal loss. If the device loses GPS or cellular signal for an extended period (such as entering a building with poor reception, or going into a basement), it may generate an alert. This does not always result in a formal violation — your probation officer will typically review the circumstances — but repeated signal loss raises red flags.

Alcohol detection (SCRAM). If you are on a SCRAM monitor, any alcohol detected in your sweat will trigger an alert. The device can distinguish between consumed alcohol and environmental alcohol (like hand sanitizer), but drinking any amount is a violation if sobriety is your condition.

Not all alerts automatically become formal violations. Your probation officer has discretion to review the circumstances. A single low-battery alert because you forgot to charge might get a warning. But a pattern of issues, or a clear attempt to tamper, will almost certainly lead to a violation hearing.

The length of time depends on your specific court order. Pre-trial monitoring lasts until your trial or case resolution — this could be weeks or months. Probation-related monitoring usually lasts 3 to 12 months, though some orders are longer. Home detention sentences match the sentence length (30 days to 2+ years). Parole monitoring typically lasts 6 months to several years. In rare cases involving sex offenses, monitoring can be lifetime.

To get the monitor removed early, you generally need to file a motion with the court requesting modification of your conditions. Your attorney can help draft this motion. The key factors a judge will consider: how long you have been on the monitor without any violations, whether you have complied with all other conditions of your probation, whether the original reasons for monitoring still apply, and whether your probation officer supports the request. A strong compliance record is your best argument.

If you cannot afford an attorney, contact a legal aid organization in your area — many will help with motions to modify supervision conditions at no cost.

Plan your charging routine. Pick the same time every day — many people charge during dinner or while watching TV at night. Keep a backup charger at work or in your car if possible.

Wear the right clothes. Long pants and socks that cover the device will make daily life more comfortable and less conspicuous. The device can cause skin irritation — keep the area clean and dry, and rotate the position slightly if allowed.

Plan your routes. If you have exclusion zones, map out your daily routes to make sure you do not accidentally drive through or near one. GPS is precise enough that driving on a highway next to a restricted area can sometimes trigger a false alert.

Communicate proactively. If you have a work schedule change, a medical appointment, or any situation that might affect your compliance, tell your probation officer before it happens. Getting advance permission is always better than explaining after the fact.

Document everything. Keep records of your work schedule, appointments, and any communications with your probation officer. If there is ever a dispute about a supposed violation, having documentation can help.

Ask about your employer's policy. Many employers are understanding about ankle monitors, especially if you are upfront about it. Some people worry about hiding it, but honesty usually works better, especially if the monitor beeps or needs charging during work hours.