Missouri DWI and Interlock Laws

According to Missouri DWI laws, your license can be suspended in two different ways after an arrest for driving under the influence.

Administrative Per Se: This happens if you fail a breath test, or refuse to take one. You have 15 days from the date of arrest to file a written request for an administrative hearing. If you do not request a hearing, or if it is unsuccessful, you must begin a suspension period which varies according to your prior record of offenses.

DWI Conviction: This occurs when you are sentenced by a court after a trial or plea agreement. You must deal with both suspensions in order to regain your driving privileges. You may also face fines,  jail time or other requirements.

Missouri offers DWI Courts as an alternative for a DWI offense. These courts focus on treatment and prevention of further alcohol-related legal problems. More information can be found here.

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.

Interlock Process

How to get an interlock license

  • Complete and submit the MO Request for Immediate 90-Day Restricted Driving Privilege form within 15 days of the date you receive the Notice of Suspension or Revocation of your Driving Privilege. The request form is contained on the notice that was mailed to you, or you may use the Request for Immediate 90-Day Restricted Driving Privilege with an Ignition Interlock Device (Form 5489).

  • Mail your request to:

    Driver License Bureau
    PO Box 3700
    Jefferson City, MO 65105-3700


    Fax to: 573-526-3452

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

  • Once installed, LifeSafer will notify DOR that you have an interlock.

  • Call your insurance company and ask for an SR22 proof of insurance form and file with:

    Missouri Driver License Bureau
    PO Box 200
    Jefferson City, MO 65105-0200

Interlock Cost

How much does an interlock cost in Missouri?

An ignition interlock (IID) is about $3 per day on average in Missouri, but you’re paying for more than the device.

LifeSafer has been in the business of helping drivers get back on the road safely for 30 years. We know what we’re doing, which means you won’t be stuck out in the cold – literally.

LifeSafer customer service and reporting specialists are also part of our value. Head into any one of our Missouri installation centers and see for yourself. Licensed LifeSafer interlock installers are constantly updating their training and calibration service. A lot is riding on your breathalyzer working properly, which is why LifeSafer invests in accuracy and ease of use.

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Convenient LifeSafer interlock installers throughout Missouri