DUI in Maryland
State-specific overview · Criminal Law
Maryland's DUI law uses 0.08% BAC and imposes mandatory minimum jail sentences and ignition interlock devices for most convictions.
How Maryland treats DUI
Maryland law prohibits driving with a 0.08% BAC or higher (0.04% for commercial drivers, 0.02% for drivers under 21). First-time DUI convictions carry a mandatory minimum of one day in jail and fines of at least $250, along with a mandatory license suspension of six months. Maryland requires ignition interlock device installation for repeat offenders and those with high BAC levels, and the state also mandates substance abuse evaluation and treatment programs.
The general definition of DUI
Driving under the influence of alcohol or drugs, a serious criminal offense.
DUI stands for Driving Under the Influence and means operating a vehicle while impaired by alcohol, drugs, or both. You can be charged with DUI even if your blood alcohol level is below the legal limit if your driving is noticeably impaired. Penalties vary by jurisdiction and whether it's a first or repeat offense, but typically include fines, license suspension, jail time, and mandatory alcohol education programs. A DUI conviction has lasting effects on insurance rates, employment, and your driving record.
Read the full DUI entry →This page is a plain-English reference and is not legal advice. State laws change frequently. For specific situations consult a licensed attorney in Maryland.