Tennessee does not have one offense formally titled “Aggravated DUI.” The phrase is commonly used to describe DUI cases carrying enhanced punishment or felony exposure because of aggravating facts such as a very high alcohol concentration, multiple prior DUI convictions, a child passenger, serious injury, or death.
Those distinctions matter because the penalties are not all found in one statute. Some facts enhance an ordinary DUI sentence; others create separate felony offenses such as vehicular assault, aggravated vehicular assault, vehicular homicide, or aggravated vehicular homicide. A useful defense begins by identifying which enhancement or separate offense the State can actually prove.
High-BAC First-Offense DUI
A first-offense DUI generally carries a minimum forty-eight hours in jail. Under § 55-10-402, however, a first offender with a blood or breath alcohol concentration of 0.15% or more must serve at least seven consecutive days.
That is an enhanced sentence rather than a separate offense. The reported alcohol concentration therefore has direct sentencing significance even when the charge remains first-offense DUI.
Repeat DUI Can Become a Felony
Second- and third-offense DUI remain misdemeanor offenses but carry increasingly severe mandatory minimum confinement. A fourth DUI is sentenced as a Class E felony with at least 150 consecutive days. A fifth DUI is a Class D felony, and a sixth or subsequent DUI is a Class C felony.
Whether a prior conviction qualifies can be contested. The defense should verify dates, judgments, out-of-state equivalency, and the special rules governing which alcohol-related convictions count as priors.
Second- and Third-Offense DUI
A second DUI requires at least forty-five consecutive days of incarceration, while a third requires at least one hundred twenty consecutive days. Tennessee also permits specified treatment alternatives after service of part of those mandatory periods in qualifying cases.
Because repeat-offender status changes mandatory jail exposure so sharply, the prior-conviction analysis can be as important as the evidence in the new stop.
DUI With a Child Passenger
If a person commits DUI while accompanied by a child under eighteen, Tennessee adds a mandatory minimum thirty days of incarceration to the DUI sentence.
If the child suffers serious bodily injury as the proximate result of the DUI, the punishment escalates to the vehicular-assault framework. If the child is killed, the punishment follows intoxication-based vehicular homicide.
Serious Injury Changes the Case
When intoxication proximately causes reckless operation that results in serious bodily injury to another person, the case may become vehicular assault, a Class D felony.
Effective July 1, 2026, Tennessee’s vehicular-assault serious-bodily-injury definition expressly includes a broken bone in addition to the other listed serious-injury categories.
Prior Convictions Do Not All Count the Same Way
Tennessee’s repeat-offender statute contains lookback and equivalency rules. Certain vehicular assault, aggravated vehicular assault, intoxication-based vehicular homicide, and aggravated vehicular homicide convictions can count as DUI priors under special provisions.
Out-of-state convictions may also qualify depending on their elements. Certified judgments and the foreign statute should be reviewed rather than relying only on a driving-history summary.
Aggravated Vehicular Assault
Aggravated vehicular assault applies when the State proves vehicular assault plus specified prior convictions or, under current law, an alcohol concentration of 0.15% or more together with one qualifying prior DUI or boating-under-the-influence conviction. The 0.15% threshold became effective July 1, 2025; it was previously 0.20%. That change makes precise offense dates important when analyzing older cases or prior website materials.
Death Can Produce Class B or Class A Felony Exposure
Vehicular homicide by intoxication is a Class B felony. Aggravated vehicular homicide is a Class A felony when the intoxication-based homicide is combined with the qualifying prior-conviction or high-BAC aggravators in § 39-13-218.
These are separate felony offenses, not simply enhanced misdemeanor DUI.
Enhanced DUI Cases Often Combine Several Issues
A single arrest may involve more than one aggravating fact—for example, a high alcohol concentration, a prior DUI, a child passenger, and a crash. Those facts may affect punishment in different ways, and some can support separate felony charges. The defense should map each fact to the statute it actually triggers. That prevents the case from being treated as more serious simply because several unfavorable facts are mentioned together.
Why the Label “Aggravated DUI” Can Be Misleading
Using a general phrase such as aggravated DUI can hide important legal differences. A high-BAC first DUI, fourth-offense DUI, DUI with a child passenger, and aggravated vehicular homicide all involve aggravating facts, but their elements and penalties are dramatically different.
The defense should insist on the precise statute and subsection the State is relying on.
Defending an Enhanced DUI Case
Potential issues include the legality of the stop, actual physical control, field sobriety evidence, blood or breath testing, prior-conviction validity, causation, serious bodily injury, child-passenger status, and whether the facts satisfy a separate felony statute.
Kevin Kennedy reviews enhanced DUI cases by identifying every alleged aggravating fact and testing it independently rather than accepting a broad label. If you are facing an aggravated or enhanced DUI allegation in Nashville or Middle Tennessee, contact Kevin Kennedy Law Firm for a free, confidential consultation.
Legal references: Tenn. Code Ann. §§ 55-10-401, 55-10-402, 55-10-405, 39-13-106, 39-13-115, 39-13-213, and 39-13-218. This page is general information, not legal advice.