Maryland DUI
Penalty Calculator

A first-offense DUI/DWI in Maryland carries fines of up to $1,000 (DUI) / $500 (DWI), jail time of up to 1 year (DUI) / 60 days (DWI), and a license suspension of 6 months. The BAC limit is 0.08 (DUI); 0.07 (DWI)%; for drivers under 21 the zero-tolerance limit is 0.02%.

Commercial drivers face a 0.04% limit nationwide.

A DUI/DWI charge in Maryland can be based on a per se violation (BAC at or above the legal limit) or on impairment — meaning an officer observed signs of intoxication regardless of BAC level. Drug-impaired driving, including prescription medications and marijuana, falls under the same statute.

Maryland law enforcement officers use standardized field sobriety tests, breathalyzer tests, and blood draws to establish impairment. Refusing a chemical test triggers separate penalties under Maryland's implied consent law.

DUI/DWI penalties in Maryland escalate sharply with each subsequent offense. The state uses a 5 years for repeat enhancement; 10 for felony lookback period to determine whether a new arrest counts as a first, second, or subsequent offense.

Prior convictions outside this window may not count for enhancement purposes, though some states have moved to lifetime lookback periods. Understanding where your case falls in this framework is critical to anticipating potential consequences.

Key reference: MD Est. & Trusts § 7-601.

Maryland's DUI/DWI cases are tried in District Court or Circuit Court. Maryland allows sobriety checkpoints.

Maryland's unique two-tier system — DUI (BAC 0.08+, up to 1 year jail, $1,000 fine) and DWI (BAC 0.07–0.079%, up to 60 days jail, $500 fine) — means lower BAC drivers still face criminal charges. Maryland requires completion of a Substance Use Assessment and alcohol education program as conditions of probation.

SR-22 is required for 3 years. Maryland's interlock program requires IID for all license reinstatement after DUI conviction or refusal.

Maryland's Administrative Per Se (APS) suspension operates independently — drivers must request an MVA hearing within 10 days. Baltimore City and Montgomery County handle the most DUI/DWI cases.

Maryland's Highway Safety Office actively monitors DUI trends in Prince George's County near DC.

A first-offense DUI/DWI in Maryland carries jail time of up to 1 year (DUI) / 60 days (DWI), fines of up to $1,000 (DUI) / $500 (DWI), and a license suspension of 6 months. Maryland does not impose mandatory minimum jail time for a first-offense DUI/DWI, giving judges discretion to impose alternative sentences such as community service, probation, or alcohol education programs.

Beyond the statutory penalties, a first-offense DUI/DWI in Maryland carries significant collateral consequences. These include a permanent criminal record (in most states), dramatically increased auto insurance premiums ($3,000–$5,000+ annually for 3–5 years), mandatory alcohol or drug education classes (typically 12–36 hours), and potential impacts on employment, professional licensing, and child custody.

The total cost of a first-offense DUI/DWI — including fines, fees, insurance increases, legal costs, and lost wages — typically ranges from $10,000 to $25,000.

Most first-offense DUI/DWI cases in Maryland are classified as misdemeanors. Diversion or deferred adjudication programs may be available for first-time offenders, allowing the charge to be reduced or dismissed upon successful completion of court-mandated conditions.

These programs typically require substance abuse assessment, completion of a treatment program, community service, and a period of monitored sobriety. Eligibility varies by county and judicial district.

Penalties for a second DUI/DWI offense in Maryland are substantially more severe than a first offense. Mandatory minimum jail sentences typically apply, fines increase significantly, and license suspension periods are extended.

In Maryland, a second offense within the 5 years for repeat enhancement; 10 for felony lookback period triggers enhanced penalties that may include mandatory jail time, extended probation, and mandatory installation of an ignition interlock device. The court has less discretion to offer alternative sentencing for repeat offenders.

A third DUI/DWI offense in Maryland often crosses the threshold into felony territory. In Maryland, a third offense remains a misdemeanor with enhanced penalties, but a fourth offense is classified as a felony with potential state prison time.

Felony DUI/DWI convictions carry long-lasting consequences including potential loss of voting rights, firearm ownership restrictions, and severe employment barriers.

The lookback period in Maryland is 5 years for repeat enhancement; 10 for felony. This is the window during which prior DUI/DWI convictions count as "priors" for sentencing enhancement purposes.

If a prior conviction falls outside the 5 years for repeat enhancement; 10 for felony lookback window, a new offense may be sentenced as a first offense. However, the prior conviction still appears on the driving record and criminal history.

Maryland imposes enhanced penalties for aggravated DUI/DWI, which typically applies when the driver's BAC is 0.15% or higher — well above the standard 0.08 (DUI); 0.07 (DWI)% limit. An aggravated or "high BAC" DUI/DWI carries stiffer mandatory minimums, longer license suspensions, and in many cases mandatory jail time even for a first offense.

The elevated BAC level is considered strong evidence of extreme impairment and reckless disregard for public safety.

Beyond high BAC, other aggravating factors in Maryland can elevate a standard DUI/DWI charge. Driving under the influence with a minor child in the vehicle (typically under age 16) is a separate or enhanced offense in most states, often adding mandatory jail time and additional criminal charges such as child endangerment.

Causing bodily injury or death while driving under the influence elevates the charge to a felony in virtually every state, with potential prison sentences of 5–20+ years.

Other common aggravating factors include driving on a suspended or revoked license at the time of the DUI/DWI arrest, excessive speeding (typically 20+ mph over the limit), driving the wrong way on a highway, and fleeing from law enforcement. Each of these factors can independently increase the severity of the charges and penalties.

In some jurisdictions, multiple aggravating factors can stack, resulting in consecutive sentences.

A DUI/DWI arrest in Maryland triggers two separate license actions: an administrative license suspension (sometimes called Administrative License Revocation or ALR) imposed by the DMV, and a court-ordered suspension upon conviction. The administrative suspension takes effect shortly after arrest — often within 30 days — regardless of whether the criminal case has been resolved.

In Maryland, the first-offense administrative suspension is typically 6 months. Drivers may request an administrative hearing to challenge the suspension, but strict deadlines apply (usually 10–30 days from the date of arrest).

Maryland requires an ignition interlock device (IID) for first-offense DUI/DWI convictions. The IID is a breathalyzer connected to the vehicle's ignition that prevents the engine from starting if the driver's BAC exceeds a preset limit (typically 0.02–0.04%).

The device must be installed at the driver's expense ($70–$150 for installation plus $60–$80 per month for monitoring and calibration). The interlock requirement typically lasts 6–12 months for a first offense, with longer periods for repeat offenders.

Restricted or hardship licenses may be available in Maryland during the suspension period, allowing driving to and from work, school, medical appointments, and court-ordered programs. Eligibility for a restricted license often requires installing an ignition interlock device and providing proof of SR-22 (high-risk) auto insurance.

Driving on a suspended license after a DUI/DWI conviction is a separate criminal offense that can result in additional jail time, fines, and extended suspension.

Like all states, Maryland has an implied consent law — by operating a motor vehicle on Maryland roads, you have implicitly agreed to submit to chemical testing (breath, blood, or urine) if an officer has probable cause to believe you are driving under the influence. Refusing a chemical test triggers separate administrative penalties that are often more severe than the penalties for failing the test.

In Maryland, the penalty for refusing a chemical test on a first occurrence is 270-day license suspension for first refusal.

Refusal to submit to testing is often used as evidence against the driver at trial. Prosecutors can argue that the refusal demonstrates consciousness of guilt — the driver knew they would fail the test.

Some states allow the jury to draw an adverse inference from the refusal. However, refusal also means there is no BAC evidence for the prosecution to present, which can make it harder to prove impairment.

This strategic calculation is one reason drivers sometimes refuse testing despite the administrative consequences.

Maryland law distinguishes between field sobriety tests and chemical tests under implied consent. Drivers can generally refuse field sobriety tests (walk-and-turn, one-leg stand, horizontal gaze nystagmus) without triggering implied consent penalties.

The implied consent law applies specifically to evidentiary chemical testing — typically a breathalyzer at the station or a blood draw. Portable breath tests (PBTs) used roadside may also fall outside the implied consent framework in some jurisdictions.

Consult a Maryland DUI attorney immediately if you are facing refusal charges.

A DUI conviction carries long-term consequences beyond the immediate penalties. The Maryland Criminal Defense Cost Estimator breaks down attorney fees, bail bond costs, and total case expenses by charge severity so you can plan accordingly.

If you're wondering how long you have to file a related civil claim — for example, a personal injury suit arising from a DUI accident — the Maryland Statute of Limitations Lookup covers filing deadlines by cause of action. And if you are dealing with a prior DUI on your record, the Maryland Expungement Eligibility Checker explains whether your record may qualify for sealing or expungement under current Maryland law.

For help with your case, find a Maryland DUI attorney.