What Happens if You Get a DWI Under 21 in Missouri?

October 30, 2026

DWI

Missouri takes underage drinking and driving seriously. While drivers who are 21 or older can face driving while intoxicated (DWI) charges for operating a vehicle while impaired, drivers under 21 are also subject to Missouri's zero-tolerance alcohol laws. These laws can result in driver's license consequences even when a young driver's blood alcohol concentration is well below the standard adult legal limit.

For teenagers, college students, and young adults in Springfield, an alcohol-related driving arrest can create serious concerns about their driving privileges, education, employment, and future opportunities. Depending on the circumstances, a young driver may face administrative penalties, criminal charges, or both.

Understanding how Missouri's underage drinking and driving laws work is important for young drivers and their families. The consequences depend on the driver's age, blood alcohol concentration, evidence of impairment, and whether they have any previous alcohol-related driving offenses.

What Is Missouri's Zero-Tolerance Law for Drivers Under 21?

Missouri has a zero-tolerance law designed to discourage individuals under 21 from drinking and driving. Under this law, a driver younger than 21 may face administrative driver's license consequences when their blood alcohol concentration (BAC) reaches 0.02% or higher.

This is significantly lower than the 0.08% BAC threshold commonly associated with adult alcohol-related driving offenses.

For example, a 19-year-old college student in Springfield who is stopped after consuming alcohol may face license consequences if a qualifying chemical test shows a BAC of 0.02% or higher, even if the evidence does not establish that the student was legally intoxicated under Missouri's ordinary DWI standard.

However, Missouri's zero-tolerance law does not mean that every driver under 21 with alcohol in their system is automatically guilty of criminal DWI. Administrative license penalties and criminal charges involve different legal standards and procedures.

A young driver may face one or both types of proceedings depending on the evidence and circumstances of the arrest.

Can You Be Charged With DWI if You Are Under 21 in Missouri?

Yes. Drivers under 21 can be charged with DWI under Missouri Revised Statutes Section 577.010 if they operate a vehicle while in an intoxicated condition.

Missouri law does not require a driver to be 21 or older for a DWI charge to apply. A 17-year-old, 19-year-old, or 20-year-old can face criminal consequences when the prosecution establishes the required elements of the offense.

Importantly, a driver does not necessarily need a BAC of 0.08% or higher to be convicted of DWI. The prosecution may rely on evidence of impairment, including driving behavior, officer observations, field sobriety testing, and other relevant circumstances.

For example, a young driver in Springfield who is involved in a collision after consuming alcohol may face a DWI investigation even if their BAC is below 0.08%.

This distinction matters because Missouri's 0.02% underage threshold is primarily associated with administrative licensing consequences, while a criminal DWI charge requires proof that the person operated a vehicle while intoxicated.

What Are the Penalties for an Underage DWI in Missouri?

The penalties for an underage DWI depend on the specific charge, the driver's history, and the circumstances of the incident.

For a first-time DWI offense without additional aggravating factors, Missouri generally classifies the offense as a class B misdemeanor. Under the state's criminal sentencing laws, a class B misdemeanor can carry a jail sentence of up to six months and a fine of up to $1,000.

However, not every underage alcohol-related driving case results in a criminal DWI conviction. Some cases involve administrative license penalties under Missouri's zero-tolerance provisions without a corresponding criminal conviction.

Potential consequences of an underage alcohol-related driving incident may include:

  • Suspension or revocation of driving privileges.
  • Criminal fines and possible incarceration when a DWI conviction occurs.
  • Court costs and other required payments.
  • Alcohol education or substance abuse assessment requirements.
  • Increased automobile insurance costs.
  • Additional penalties for repeat offenses or aggravating circumstances.

For young drivers in Springfield, these consequences can interfere with school, work, and other daily responsibilities.

A prior offense, an accident involving injuries, or other aggravating circumstances may substantially increase the potential penalties.

Will You Lose Your Driver's License for an Underage DWI?

Possibly. Missouri has administrative procedures that can result in driver's license suspension or revocation following certain alcohol-related driving incidents.

Under Missouri's zero-tolerance provisions, drivers under 21 may face license consequences for qualifying BAC results of 0.02% or higher. These consequences are separate from any criminal case.

For a first qualifying zero-tolerance violation, the administrative penalty is generally a 30-day suspension. Subsequent qualifying violations can result in more serious consequences, including a longer suspension or revocation.

However, different rules may apply when a young driver is arrested for DWI with a BAC of 0.08% or higher or refuses a legally requested chemical test.

Missouri's administrative alcohol laws can impose separate penalties based on the circumstances, and the applicable procedures may involve different deadlines and opportunities to challenge the action.

For drivers in Springfield, it is important to review the specific notice issued by the Missouri Department of Revenue rather than assuming that every underage alcohol-related driving case carries the same license penalty.

What Happens if You Refuse a Breathalyzer Test in Missouri?

Refusing a chemical test can create additional legal consequences for a driver suspected of DWI. Missouri's implied consent law generally provides that individuals operating vehicles on public highways are deemed to have consented to certain chemical tests under circumstances specified by law.

When an officer has the required legal grounds to request testing, refusing may result in administrative driver's license consequences separate from the criminal DWI case.

For example, a 20-year-old driver arrested in Springfield may believe that refusing a breath test will prevent law enforcement from gathering evidence of alcohol consumption. However, refusal can lead to a separate license revocation proceeding, and officers may seek a warrant authorizing chemical testing.

Under Missouri law, a qualifying chemical test refusal generally results in a one-year driver's license revocation, subject to applicable procedures and review rights.

The legality of the stop, arrest, testing request, and alleged refusal may all be relevant when challenging these consequences. A defense attorney can examine whether law enforcement complied with Missouri's requirements and whether the administrative action is legally supported.

Can an Underage DWI Affect College or Employment Opportunities?

An underage DWI can create consequences extending beyond the courtroom. Young adults in Springfield may depend on their driving privileges to attend college, maintain employment, or meet family obligations.

A criminal conviction can also raise concerns during background checks, professional licensing applications, and other situations where an applicant's criminal history may be considered.

Potential consequences may include:

  • Difficulty commuting to school or work after a license suspension.
  • Disciplinary proceedings under a college or university's student conduct policies.
  • Increased automobile insurance premiums.
  • Employment complications for positions requiring driving.
  • Additional scrutiny during certain professional licensing applications.
  • Long-term concerns involving a criminal record.

However, the consequences depend on whether the case results in an administrative violation, a criminal conviction, or another outcome. A zero-tolerance license action is not necessarily equivalent to a criminal DWI conviction.

For students attending college in Springfield, understanding this distinction can help them evaluate the potential effects on their education and future plans.

Can a First-Time Underage DWI Be Dismissed or Reduced?

A first-time DWI charge does not automatically result in a conviction. The prosecution must establish the elements of the offense, and the defense may challenge the legality of the traffic stop, the evidence of impairment, and the procedures used during the investigation.

Depending on the circumstances, a case may involve questions about whether the officer had reasonable suspicion to initiate the stop or probable cause to make an arrest.

Other potential defense issues include:

  • Whether field sobriety tests were properly administered.
  • Whether medical conditions or other factors affected the driver's performance.
  • Whether chemical testing equipment was maintained and operated correctly.
  • Whether testing procedures complied with applicable regulations.
  • Whether the evidence establishes intoxication rather than merely alcohol consumption.
  • Whether the defendant's constitutional rights were respected.

For example, a 19-year-old driver in Springfield may have a measurable BAC that supports an administrative zero-tolerance action but does not, by itself, establish criminal intoxication.

Depending on the facts, an attorney may seek dismissal, challenge particular evidence, negotiate an appropriate resolution, or defend the case at trial. No specific outcome is guaranteed, and the available options depend on the charges and evidence.

How Long Does an Underage DWI Stay on Your Record in Missouri?

The long-term consequences of an underage alcohol-related driving incident depend on the type of proceeding and its outcome.

A criminal DWI conviction can remain on a person's criminal record unless relief is available under Missouri law. Administrative license actions may also appear in driving records maintained by the Missouri Department of Revenue.

Missouri provides limited opportunities for expungement of certain alcohol-related driving offenses. For example, Section 577.054 allows some individuals with a qualifying first alcohol-related driving offense to seek expungement after meeting statutory requirements, including a waiting period.

However, expungement is not automatic, and not every offense qualifies. Prior convictions, the classification of the offense, and other circumstances can affect eligibility.

For young drivers in Springfield, understanding the distinction between criminal records and administrative driving records is important when evaluating the long-term consequences of an arrest.

An attorney can review the case history and explain whether any future record-clearing options may be available.

What Should Parents Do if Their Child Is Arrested for DWI?

When a teenager or young adult is arrested for an alcohol-related driving offense, parents may be unsure how to respond. The situation can be especially stressful when the driver is still in high school, attending college, or dependent on family transportation.

The first priority should be understanding the allegations and identifying any immediate court or administrative deadlines.

Parents can help by ensuring that the young driver preserves relevant paperwork, follows release instructions, and attends all required court appearances. They should also avoid assuming that the case will be handled informally simply because the driver is under 21.

If the driver is a minor, additional procedures may apply depending on the offense and the court with jurisdiction. Cases involving drivers who are 18 to 20 years old generally proceed differently from cases involving younger juveniles.

For families in Springfield, speaking with a criminal defense attorney can help clarify the charges, explain the possible consequences, and identify the steps necessary to protect the young driver's rights.

How Can a Springfield DWI Attorney Help With an Underage DWI Charge?

Underage alcohol-related driving cases can involve criminal proceedings, administrative license actions, or both. Because these proceedings may operate independently, addressing only the criminal charge may leave important driver's license issues unresolved.

A DWI defense attorney can review the circumstances of the arrest, examine the evidence, and determine which legal deadlines apply.

Depending on the case, representation may involve:

  • Investigating the traffic stop and arrest.
  • Reviewing breath or blood testing evidence.
  • Challenging improperly obtained or unreliable evidence.
  • Addressing administrative license suspension or revocation proceedings.
  • Representing the driver in criminal court.
  • Evaluating potential defenses and available case resolutions.
  • Explaining the long-term implications of a conviction or license action.

Our Springfield DWI defense attorney at the Law Office of Steven F. Groce represents individuals facing alcohol-related driving allegations throughout Springfield and Missouri.

An underage DWI case should be evaluated based on its specific facts, including the driver's age, the evidence of impairment, and the procedures followed by law enforcement.

Speak With a Springfield DWI Defense Attorney at the Law Office of Steven F. Groce

Missouri's zero-tolerance law can result in driver's license consequences for drivers under 21 with a BAC of 0.02% or higher. Young drivers may also face criminal DWI charges when the evidence establishes that they operated a vehicle while intoxicated.

At the Law Office of Steven F. Groce, we represent individuals facing DWI charges in Springfield and throughout Missouri. If you or your child has been arrested for an underage alcohol-related driving offense, we are here to help. Call us today or connect with us online to schedule a consultation.

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Steven F. Groce
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Springfield, MO 65803
(417) 883-4950
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