Maryland DUI vs. DWI: Key Differences for Drivers
Understand how Maryland separates DUI from DWI, what BAC levels mean, and the penalties that can impact your record and license.
Maryland treats impaired driving as a serious criminal offense, but it does not use the terms DUI and DWI interchangeably. Instead, the state separates drunk and drugged driving into two distinct categories: Driving Under the Influence (DUI) and Driving While Impaired (DWI), each with different blood alcohol content (BAC) thresholds and penalties.
This guide explains how Maryland law defines DUI and DWI, the difference in BAC limits, the criminal and administrative penalties, and what those distinctions mean for your driving record and future opportunities.
Core Legal Distinction: DUI vs. DWI in Maryland
While both DUI and DWI involve impaired driving, Maryland law draws a line based on degree of impairment and BAC levels.
Driving Under the Influence (DUI)
DUI is the more serious impaired driving offense under Maryland law. It generally applies when a driver is found to be operating a vehicle:
- Under the influence of alcohol to the point that normal driving abilities are substantially impaired; or
- With a BAC of 0.08% or higher — known as “under the influence per se.”
At or above 0.08% BAC, Maryland law presumes the driver is under the influence of alcohol, even if they appear to be driving reasonably. This presumption is written into state law and forms the basis of the “per se” DUI standard used in criminal and administrative proceedings.
Driving While Impaired (DWI)
DWI is a separate, lesser offense, but still a criminal charge with significant consequences. DWI applies when:
- A driver’s BAC is 0.07%, at which point Maryland law assumes impairment by alcohol; or
- Evidence shows the driver’s “normal condition” is affected by alcohol or drugs, even if BAC is below 0.08%.
In practice, a DWI charge often involves borderline BAC readings near the legal limit or observable signs that alcohol or drugs have reduced the driver’s ability to operate a vehicle safely.
Summary: Severity and Legal Classification
Both DUI and DWI are treated as misdemeanor crimes in Maryland, but DUI carries more severe penalties and higher point assessments on your driving record.
| Feature | DUI (Driving Under the Influence) | DWI (Driving While Impaired) |
|---|---|---|
| Typical BAC threshold | 0.08% or higher (“under the influence per se”) | Generally around 0.07%, with presumed impairment |
| Severity | More serious offense | Lesser impaired driving offense |
| Points on driving record (first offense) | 12 points — can trigger license revocation | 8 points — can trigger license suspension |
| Maximum jail time (first offense) | Up to 1 year | Up to 2 months |
| Maximum fine (first offense) | Up to $1,000 | Up to $500 |
BAC Thresholds and How They Affect Your Case
Blood alcohol content plays a central role in determining whether a driver is charged with DUI, DUI per se, or DWI in Maryland. However, BAC is not the only factor; officer observations and other evidence also matter.
Under the Influence Per Se: 0.08% and Above
Maryland defines driving “under the influence per se” as operating any motor vehicle with a BAC of 0.08% or higher. At this level:
- The state does not need to prove actual unsafe driving; the BAC number itself is enough to establish the offense.
- Administrative sanctions, such as license suspension, can be imposed simply based on the test result.
For many drivers, the difference between 0.07% and 0.08% BAC is the difference between a DWI charge and a DUI per se charge, which carries more severe consequences.
Presumed Impairment at 0.07% BAC
At a BAC of 0.07%, Maryland law presumes that a driver is impaired by alcohol for purposes of a DWI charge. An officer may rely on:
- Breath or blood test results showing a 0.07% BAC; and
- Additional evidence such as erratic driving, slurred speech, or failed field sobriety tests.
Even when BAC is below 0.08%, a DWI charge can lead to fines, jail time, points on your record, and license suspension.
Criminal Penalties for DUI and DWI
Every impaired driving conviction in Maryland carries criminal penalties that can include fines, jail time, and a permanent criminal record. Penalties typically increase with each subsequent conviction.
DUI Criminal Penalties
According to official guidance from the Maryland Motor Vehicle Administration (MVA), a first DUI conviction can result in:
- Up to $1,000 in fines
- Up to 1 year in jail
- 12 points on your driving record
- Possible license revocation for up to 6 months
Second and later DUI convictions carry higher fines, longer potential jail terms, and extended periods of license revocation. Enhanced penalties may apply if a minor is in the vehicle during the offense, reflecting Maryland’s particularly strict stance on impaired driving involving children.
DWI Criminal Penalties
For first-time DWI offenders, MVA guidance indicates:
- Up to $500 in fines
- Up to 2 months in jail
- 8 points on your driving record
- A 6-month license suspension (longer if under age 21)
For a second DWI, the potential jail term increases to up to 1 year, and license suspensions can range from 9 to 12 months, with stricter rules for drivers under 21.
License Consequences and MVA Actions
Maryland treats impaired driving as both a criminal issue and a licensing issue. Separate from the courts, the Maryland Motor Vehicle Administration can revoke or suspend a driver’s license and assign points for DUI and DWI convictions.
Points on Your Driving Record
- DUI conviction: 12 points — enough to trigger license revocation.
- DWI conviction: 8 points — sufficient to cause license suspension.
Points remain on a driver’s record for two years, and accumulating large numbers of points can lead to additional administrative action beyond the impaired driving case itself.
Suspensions and Revocations
Depending on the nature of the offense and prior record, MVA may:
- Suspend a license for several months (more common in DWI cases); or
- Revoke a license for extended periods in the case of DUI and repeated impaired driving convictions.
Drivers under age 21 face even stricter suspension periods, reflecting Maryland’s zero-tolerance policy for underage drinking and driving.
Underage Drivers and Zero Tolerance
Maryland law is particularly strict when it comes to drivers under the legal drinking age. A person under 21 who drives with any alcohol in their system is breaking the law and can be charged with DUI.
Consequences for underage impaired driving can include:
- Criminal penalties similar to adult drivers, including fines and potential jail time;
- Longer periods of license suspension or revocation;
- Significant impact on education, employment options, and future licensing.
Because of these stakes, underage drivers accused of DUI or DWI often face complicated interactions between juvenile or criminal courts and MVA rules.
Process After a DUI or DWI Arrest in Maryland
Following an arrest for suspected impaired driving, several things typically happen under Maryland law.
Breath Test and Immediate License Issues
After being stopped, a driver may be asked to submit to a breath or blood test to determine BAC. Refusing or failing the test can trigger administrative penalties, including:
- Immediate issuance of a temporary paper license;
- A short period of continued driving (such as 45 days) while the case is pending;
- Potential suspension periods that can be longer than those imposed for failing the test.
Court Proceedings and Potential Outcomes
Anyone arrested for DWI or DUI will be charged with a crime and required to appear in court. If found guilty, the driver faces:
- A criminal conviction that remains on their record;
- Possible jail time and fines as discussed above;
- Additional sanctions from MVA, including points and suspension or revocation.
Penalties increase with each subsequent conviction, and certain circumstances — such as transporting a minor — can lead to enhanced jail terms and fines.
Long-Term Impact of DUI and DWI
Beyond fines, jail, and license consequences, Maryland DUI and DWI convictions can have lasting effects on a person’s life.
- Criminal record: Both DUI and DWI are misdemeanors that can appear on background checks.
- Employment and licensing: Certain jobs, security clearances, and professional licenses may be harder to obtain with impaired driving convictions.
- Insurance costs: Premiums may rise significantly after a serious traffic-related conviction.
- Repeat offender sanctions: Each new conviction generally leads to harsher penalties and longer loss of driving privileges.
Practical Tips for Maryland Drivers
Understanding the DUI/DWI distinction is useful, but the most important step is avoiding impaired driving altogether. For informational purposes, Maryland drivers should keep in mind:
- Small BAC differences matter: The difference between 0.07% and 0.08% can mean the difference between DWI and DUI.
- Legal limits are not safety guarantees: Impairment can begin well below 0.08%, and drivers can be charged with DWI even with lower BAC if their condition is affected.
- Administrative penalties are separate: Even if criminal charges are reduced or dismissed, license consequences may still apply based on test results and MVA rules.
- Underage rules are stricter: Any alcohol for drivers under 21 can lead to serious penalties.
Frequently Asked Questions About Maryland DUI vs. DWI
Is DUI always more serious than DWI in Maryland?
Yes. In Maryland, DUI is considered the more serious offense. It is associated with higher BAC levels, more points on your driving record, and harsher potential penalties compared to DWI.
Can I be charged with DWI if my BAC is below 0.08%?
Yes. A BAC at or around 0.07% can support a DWI charge, and impairment may also be proven through officer observations and other evidence even if the BAC is below 0.08%.
What is “DUI per se”?
“DUI per se” refers to driving with a BAC of 0.08% or higher, regardless of visible driving behavior. At that level, Maryland law presumes the driver is under the influence of alcohol, making the BAC number itself enough to support the charge.
How many points will I get on my license for DUI or DWI?
A first DUI conviction typically results in 12 points, which can trigger license revocation, while a first DWI conviction results in 8 points, which can lead to license suspension.
Do DUI and DWI convictions stay on my record permanently?
Impaired driving convictions can remain on your criminal record indefinitely and may show up in background checks. Points on your driving record related to DUI or DWI remain for two years, but MVA actions such as revocation or suspension can have longer-lasting implications.
References
- DUI/DWI — Maryland People’s Law Library. 2024-01-01. https://www.peoples-law.org/duidwi
- Maryland DUI vs DWI: Differences To Know for Drivers — Super Lawyers. 2023-06-01. https://www.superlawyers.com/resources/dui-dwi/maryland/dui-v-dwi-what-is-the-difference/
- Driving Under the Influence (DUI) — Maryland Motor Vehicle Administration. 2023-09-15. https://mva.maryland.gov/your-mva-guide/drivers-revoked-or-suspended-licenses/driving-under-influence-dui
- DUI vs. DWI in Maryland: Understanding the Difference from a Maryland DUI Lawyer — Tadlaw. 2022-11-01. https://www.tadlaw.net/blogs/dui-vs–dwi-in-maryland–understanding-the-difference-from-a-maryland-dui-lawyer
- Maryland DUI vs. DWI: What’s the Difference and Why It Matters — Hartman Attorneys at Law. 2023-04-10. https://www.hartmancriminallaw.com/blog/maryland-dui-vs-dwi-whats-the-difference-and-why-it-matters/
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