Maryland Ignition Interlock DUI Laws

Maryland has two charges for alcohol-impaired driving: DUI (driving under the influence) and DWI (driving while impaired). Each has separate criminal court implications.

If you are arrested for a DUI or a DWI in Maryland, your license can be suspended in two different ways, administrative or judicial. An administrative suspension is a direct result of failing a breath test or refusing to take one. As a result, your license is confiscated and you are given a temporary license that expires in 30 days. If you refuse a test, or your blood alcohol concentration (BAC) is .08 or higher, you have 10 days from the date of your arrest to request a Maryland Motor Vehicle Administration (MVA) hearing. If you do not request a hearing, or if your hearing is not successful, your license will automatically be suspended starting 46 days after your arrest.

If you have an ignition interlock device installed while you have your temporary license, you should be able to avoid MVA court and a further administrative license suspension.  It is possible that your time using an interlock while under administrative suspension will be applied to any additional MA court-ordered suspension if convicted on the same matter.  In some cases, you can obtain a restricted license that allows you to drive to work, school or other authorized locations. In Maryland, if your chemical test result was .15 or higher, you are not eligible for a restricted license. Your only option in this instance is to install an interlock device in your vehicle for one year. To have this option, you must install the interlock device within 30 days after your arrest.

After a conviction for an alcohol-related offense, you’ll have an additional MVA hearing. The MVA has the power to suspend or even revoke your driver’s license. The penalties are even more severe for those under 21 and commercial drivers. There are also criminal penalties for both DUI and DWI in Maryland. First-time offense convictions can result in jail, fines, additional license suspension periods, and points added to your license. A full list of penalties can be found here.

A note about Maryland’s Suspension vs. Revocation: After a suspension, your license is automatically reinstated. After a revocation for an alcohol-related offense, you are not eligible for reinstatement for one year. You’re required to participate in an alcohol treatment program and be certified by testing as alcohol-free for more than one year.


Every situation and state is unique, please consult with your attorney or your state licensing authority to confirm your requirements and obligations.

The information provided on this website does not, and is not intended to, constitute legal advice; instead, all information, content, and materials available on this site are for general informational purposes only. Information on this website may not constitute the most up-to-date legal or other information. This website contains links to other third-party websites for the convenience of our readers. Links from LifeSafer Ignition Interlock to other sites, or from other sites to the LifeSafer, do not constitute an endorsement by LifeSafer.  

Benefits of installing an interlock as early as possible: The incentive is obtaining driving privileges and day for day credit for early install.

Interlock Process

At the time of your arrest, you will receive a paper license (DR15A) valid for 30 days. The DR15A allows you to drive only within this time period, so make sure to act quickly.

How do I get an interlock license?

  • Your paper license comes with instructions on how to regain driving privileges by obtaining an interlock restricted license or requesting an MVA hearing.

  • Call LifeSafer Ignition Interlock at 800-634-3077 to schedule your ignition interlock installation. Ask about offers and money-saving discounts!

  • Have your interlock installed. You will receive proof of installation and a lease agreement.

  • Take your proof of installation to a Motor Vehicle Administration (MVA) office to obtain your restricted license.

Interlock Cost

How much does an interlock cost in Maryland?

For an ignition interlock (IID), Maryland drivers can expect to pay close to the national average of $3 per day. We like to search for the best prices, but when you need a car breathalyzer, consider more than just the price tag. You need competent professionals to install the device as well as customer service to help keep your program running smoothly.

LifeSafer interlock devices are factory tested for accuracy and calibrated to high standards before they ever reach the shop. You can trust our first-rate installation technicians to fit any vehicle with a device and do it right at your Maryland installation center. And if something isn’t right, nobody beats our customer service.

We know the stakes couldn’t be higher. That’s why LifeSafer is committed to making high-quality interlocks, maintaining skilled installation staff, and offering great customer service so that you get a value that goes way beyond the price tag.

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Convenient LifeSafer interlock installers throughout Maryland

LifeSafer partners in Maryland

Navigating DUI laws in Maryland can be difficult. That’s why LifeSafer partners with experienced DUI attorneys and treatment centers throughout the state to provide our clients with accurate legal advice. Call us now at 800-634-3077 and a knowledgeable Customer Support Consultant will guide you through the steps to regaining your freedom to drive.

Portner and Shure

Jonathan Portner
7226 Lee DeForest Drive, Suite 101
Columbia, Maryland, 21046

William R. Hall, PA

William Hall
100 East Main Street, 7th Floor
Salisbury, Maryland, 21801

Wm. A. Lee Clarke III, P.C., Attorney at Law

Lee Clarke
30644 Brandywine Ct
Salisbury, Maryland, 21804