DUI vs DWI in Maryland | What's the Difference?
Updated October 8, 2026
In Maryland, DUI generally alleges a higher level of impairment or an alcohol concentration of 0.08 or higher, while DWI addresses a lower level of alcohol impairment. Both are criminal traffic offenses that can bring court and licensing consequences. For help with a specific charge, visit our Maryland DUI defense page.
Who Initiates DUI/DWI Charges?
DUI and DWI offenses in Maryland are criminal traffic offenses. Law enforcement may issue the charges, and the State prosecutes the criminal case.
The process often starts with a vehicle stop, followed by observations, questions, and possible field sobriety testing. An officer may also request a chemical breath test. A test result or refusal can create a separate administrative licensing matter even before the criminal case is resolved.
What Driving Conduct Can Qualify?
Maryland's definition includes operating, moving, or exercising actual physical control of a vehicle. Mere intent to drive is not, by itself, the same as driving or attempting to drive.
Whether particular facts establish driving, attempted driving, or actual physical control requires a case-specific analysis. The location of the vehicle, the person's position, control over the vehicle, and other surrounding facts may matter. Learn more about actual physical control and the shelter rule.
DWI Basics in Maryland
A DWI allegation involves driving, attempting to drive, or exercising actual physical control while impaired by alcohol. The State may rely on driving observations, statements, field sobriety testing, a chemical test, video, and other evidence. No single type of evidence automatically establishes guilt, and the State retains the burden of proving the charge beyond a reasonable doubt.
For a focused explanation of this charge, see Maryland DWI charges.
Legal Alcohol Limits in Maryland
A DUI per se applies when the alcohol concentration is 0.08 or higher. A result of at least 0.07 but below 0.08 is prima facie evidence of impairment under Maryland law; it does not automatically establish guilt.
Prima facie evidence means evidence that can support a finding unless it is answered or rebutted. The State still must prove the charge beyond a reasonable doubt.
DUI and DWI charges can also depend on other evidence, including driving observations, statements, and field sobriety testing. A result below 0.08 does not necessarily rule out an alcohol-related driving charge.
Base Maximum Penalty for Alcohol-Related DWI
For an ordinary first alcohol-related DWI, the base maximum is up to two months of incarceration, a fine up to $500, or both. A minor passenger or qualifying prior convictions can change the applicable penalties.
What Constitutes a DUI?
A DUI allegation involves driving, attempting to drive, or exercising actual physical control while under the influence. A DUI per se allegation is based on an alcohol concentration of 0.08 or higher. A non-per-se DUI charge may depend on observations, statements, testing, video, and the complete circumstances rather than one type of evidence alone.
Base Maximum Penalty for DUI or DUI Per Se
For an ordinary first DUI or DUI per se offense, the base maximum is up to one year of incarceration, a fine up to $1,200, or both.
These are base maximums. Minor passengers and qualifying prior convictions can change the applicable penalties. Different repeat-offender provisions have different requirements, so review the detailed Maryland repeat DUI penalties rather than assuming one enhancement applies to every prior case. Maryland's selected fine increases took effect June 1, 2025, as explained in our 2025 DUI fine update.
DUI vs DWI: The Core Difference
The core difference is the level and type of proof. DUI carries higher ordinary first-offense maximum penalties than alcohol-related DWI. DUI per se applies at an alcohol concentration of 0.08 or higher, while a result of at least 0.07 but below 0.08 is prima facie evidence of impairment.
Which is worse, DUI or DWI?
DUI carries higher base maximum penalties than alcohol-related DWI in Maryland. An ordinary first DUI carries up to one year, a fine up to $1,200, or both. An ordinary first alcohol-related DWI carries up to two months, a fine up to $500, or both. Both charges can still affect a person's license, record, insurance, and employment.
Can a DUI be reduced to a DWI?
Often, yes, with the right facts and strategy. Reduction discussions typically turn on your BAC level and test method, the reliability of the field sobriety tests, whether you refused the roadside PBT (see PBT vs. Breathalyzer), the quality of the stop, and procedural issues like machine maintenance and officer training. Some cases call for trial, others for a negotiated downgrade to DWI, and some for Probation Before Judgment when available.
Side-by-Side Comparison
| Feature | DWI | DUI |
|---|---|---|
| Alcohol-concentration evidence | At least 0.07 but below 0.08 is prima facie evidence of impairment | 0.08 or higher supports DUI per se |
| Ordinary first-offense base maximum | Up to two months, a fine up to $500, or both | Up to one year, a fine up to $1,200, or both |
| Other proof | May include driving observations, statements, field sobriety testing, video, and other evidence | May include the same types of evidence; DUI per se specifically depends on the qualifying alcohol concentration |
| Potential case outcomes | Dismissal, acquittal, negotiated resolution, or PBJ where eligible | Dismissal, acquittal, negotiated resolution, or PBJ where eligible |
| License consequences | Administrative sanctions, conviction points, and ignition-interlock rules require separate analysis | Administrative sanctions, conviction points, and ignition-interlock rules require separate analysis |
License Consequences Are a Separate Analysis
Criminal penalties and license consequences are related but distinct:
| Licensing issue | What it concerns |
|---|---|
| Administrative sanctions | A breath-test result or refusal can lead to a separate MVA process with deadlines that may arrive before the criminal court date. |
| Convictions and points | A conviction can lead to assessed points and resulting license consequences. A PBJ may avoid conviction points, but it does not erase a separate administrative suspension. |
| Ignition interlock | Interlock rules are separate from points. A reduction to alcohol-related DWI or a PBJ does not necessarily avoid interlock. Current law includes DUI and alcohol-related DWI PBJs among participation triggers. |
Review an Order of Suspension promptly and coordinate the MVA matter with the criminal case. Our first-time DUI FAQ explains the initial deadlines and driving questions.
If You're Charged: Next Steps
If you need representation after reviewing the distinction, FrizWoods handles Maryland DUI and DWI defense. Every case is distinct, and an attorney can explain potential defenses, outcomes, and trial preparation.
Potential defense issues can include:
- Administration of field sobriety tests
- Officer opinions and observations
- Accident reconstruction
- Actual physical control of a vehicle
- Breath testing issues
- The legal basis for the vehicle stop
Frequently Asked Questions
What is the difference between DUI per se and DWI in Maryland?
DUI per se applies when the alcohol concentration is 0.08 or higher. A result of at least 0.07 but below 0.08 is prima facie evidence of impairment, but it does not automatically establish DWI. The State still must prove guilt beyond a reasonable doubt and may rely on other evidence.
Is a DWI less serious than a DUI in Maryland?
Alcohol-related DWI has lower ordinary first-offense maximum penalties than DUI. It can still lead to incarceration, a fine, license consequences, and ignition-interlock requirements.
Can a DUI be reduced to a DWI in Maryland?
Sometimes. A negotiated reduction depends on the evidence, alcohol concentration, legal issues, and circumstances. Dismissal, acquittal, a negotiated resolution, and PBJ where eligible may be possible outcomes for either charge.
Does a PBJ or reduction to DWI avoid ignition interlock?
Not necessarily. A PBJ may avoid conviction points, but it does not erase a separate administrative suspension. Current law also includes DUI and alcohol-related DWI PBJs among ignition-interlock participation triggers.
Why Trust FrizWoods?
FrizWoods represents people facing DUI and DWI charges across Maryland, including Annapolis and Calvert County. Max Frizalone and Luke Woods evaluate the criminal case, MVA deadlines, testing evidence, and potential outcomes together.