Calibration F.A.Q.

Ignition interlock calibrations with Simple aren’t anything to stress about! Simply refer to your device or your last service receipt to find your next calibration date. When you arrive at the service center, let the technician know you’re there to calibrate your ignition interlock device and they’ll help you out.

As of 2024, you may be required to pay $25+ for your calibration service appointment along with your monthly lease. This fee will be paid directly to the service center during the appointment—not Simple Interlock. It aligns with industry-standard practices and is intended to cover the labor and operational costs required to maintain and service your device.

Some states don’t require you to calibrate your ignition interlock every month. Calibration schedules are determined by the state. The following calibration schedule pertains to the jurisdiction of your conviction, which may differ from your place of residence. Please refer below to find how often you should calibrate your device.

Remember! Although the frequency of servicing may vary, your lease payments remain due monthly. It is crucial to visit the service center on your scheduled date. Failure to do so may result in an additional service charge being applied.

If your state of conviction is listed below, you must return for service every 30 days after your initial visit. Following this, your servicing schedule shifts to every 60 days:

  • Florida
  • Kentucky
  • Maine
  • New Mexico
  • New York
  • Pennsylvania
  • Wyoming

For states not listed above, servicing is required every:

  • 30 days for: Alabama, Connecticut, Delaware, District of Columbia, Georgia, Indiana, Kansas, Massachusetts, Mississippi, Missouri, Nebraska, Rhode Island, Tennessee, Virginia
  • 60 days for: Arkansas, California, Colorado, Illinois, Iowa, Louisiana, Maryland, Michigan, Minnesota, Montana, New Jersey, North Carolina, Ohio, Oklahoma, Oregon, South Carolina, Utah, Vermont, Washington, West Virginia, Wisconsin
  • 90 days for: Alaska, Arizona, Nevada


Why is calibration necessary? Calibration is necessary to maintain the accuracy of your device over time. Regular calibration ensures that the device continues to provide precise BrAC readings. Each state also requires this.

How long does calibration take? Calibration typically takes a short amount of time and can often be completed within a single visit to a  service center. However, the exact duration may vary depending on factors such as the type of device and any additional services needed.

What should I bring to my calibration appointment? When attending a calibration appointment, be sure to bring your vehicle, any necessary documentation (such as your driver’s license and vehicle registration), and your lease agreement or documentation provided by your monitoring authority.

Is there a fee for calibration? The calibration fee varies depending on your location and service center. The fee can be as low as $25. 

Why is there a calibration fee? Calibration fees are an industry-standard fee that covers the labor and operational costs for the service center.