Utah DUI laws set the blood alcohol concentration limit at 0.05%, the lowest per se threshold in the United States. A first offense is generally a class B misdemeanor under Code Section 41-6a-502. Penalties can include mandatory minimum jail time, fines starting at $700, and license suspension. This guide covers offense tiers, license consequences, and interlock rules. Source: Utah Code and the Utah Highway Safety Office.
Utah’s 0.05% BAC Limit Explained
Utah Code Section 41-6a-502 sets the per se blood alcohol concentration limit at 0.05%. A driver who tests at or above this level can be charged with DUI regardless of whether their driving appeared impaired. Utah lowered its BAC limit from 0.08% to 0.05% in December 2018, making it the lowest per se threshold of any state. Older sources or outdated web pages that still reference a 0.08% limit no longer reflect current Utah law.
The law also allows a DUI charge under a separate impairment standard, sometimes called impaired to any degree. This standard applies when a driver’s ability to operate a vehicle is affected by alcohol, drugs, or a combination of both, even if their BAC tests below 0.05%. The per se limit and the impairment standard are separate legal paths to a DUI charge, and either one alone can support a conviction under Code Section 41-6a-502.
A driver does not need to be actively driving to face DUI charges in Utah. The legal concept of actual physical control means a person seated in the driver’s seat with the ability to operate the vehicle can be charged, even if the car is parked and not moving. This standard exists so impaired individuals cannot avoid liability by sitting in a stopped vehicle instead of driving it.
DUI Classification Levels Under Utah Law
Utah Code Section 41-6a-502, driving under the influence statute works with Code Section 41-6a-503, which sets the classification structure and determines how serious a charge is treated. A first or second DUI offense is typically a class B misdemeanor, carrying up to six months in jail and a fine. Aggravating factors, such as a passenger under 18 in the vehicle, can raise a charge to a class A misdemeanor, carrying up to 364 days in jail.
A third or subsequent DUI offense within ten years, or a DUI that causes serious bodily injury, can be charged as a third degree felony under Utah law. A felony DUI carries the potential for prison time rather than jail time, along with substantially higher fines. These classification tiers work together with Code Section 41-6a-505, which sets the specific mandatory minimum sentence for each offense level.
Who Utah’s DUI Laws Apply To
Utah’s 0.05% BAC limit applies to general adult drivers operating standard passenger vehicles on public roads, according to the Utah Highway Safety Office summary of Utah’s DUI laws. Commercial drivers face a stricter federal standard of 0.04% BAC, set by the Federal Motor Carrier Safety Administration and mirrored in Utah’s highway safety guidance. This lower threshold reflects the added responsibility of operating large commercial vehicles and applies whenever a commercial license holder is driving a commercial vehicle.
Drivers under the age of 21 are subject to Utah’s zero tolerance rule, sometimes called the Not-a-Drop law, under Code Section 53-3-231. This rule prohibits any detectable amount of alcohol in an underage driver’s system while operating a vehicle, regardless of whether it reaches the 0.05% adult limit. The exact license suspension length tied to a zero tolerance violation varies by circumstance, so drivers under 21 should verify current consequences with official state sources.
First Offense DUI Penalties in Utah
Under Code Section 41-6a-505, a first DUI offense carries a mandatory minimum penalty. This typically includes at least 48 hours of jail time or an equivalent period of home confinement or community service, along with a fine starting at $700. Courts may also require a screening and assessment for alcohol or substance use, along with any recommended treatment or education program as part of sentencing.
The $700 figure reflects the statutory minimum fine under Code Section 41-6a-505, not the full amount a driver may ultimately pay. Secondary sources report that total costs, including surcharges and court security fees, often fall in a broader range depending on the specific court. Readers should treat the $700 figure as the statutory floor rather than a fixed total cost, since actual amounts vary by jurisdiction within Utah.
Second and Third Offense DUI Penalties
A second DUI offense within ten years carries increased mandatory minimums under Code Section 41-6a-505, including a longer mandatory jail term than a first offense and a higher minimum fine. Courts also generally require alcohol or substance use treatment as part of sentencing for a second offense. The classification typically remains a class B misdemeanor unless aggravating factors under Code Section 41-6a-503 apply.
A third DUI offense within ten years is generally charged as a third degree felony under Utah law. This elevated classification reflects the increased risk associated with repeat impaired driving and can result in substantially longer incarceration exposure along with higher fines than a misdemeanor-level offense. Mandatory minimum sentencing requirements under Code Section 41-6a-505 continue to apply at the felony level.
Extreme DUI at 0.16% BAC or Higher
Utah law treats a DUI with a BAC of 0.16% or higher as an extreme DUI, a category that triggers enhanced mandatory penalties beyond a standard DUI charge. This threshold is more than three times the standard 0.05% per se limit. An extreme DUI generally results in a longer mandatory minimum jail term and a higher minimum fine than a standard first or second offense under the same classification level.
The 0.16% extreme DUI threshold also determines eligibility for Utah’s new interdicted person designation, discussed later in this guide. Because the extreme DUI enhancement applies specifically at the 0.16% level, it does not apply to every DUI conviction. A driver convicted at a lower BAC level does not face the extreme DUI enhancement, even if other aggravating factors are present in their case.
License Suspension and Revocation Rules
Code Section 41-6a-509 governs license suspension and revocation following a Utah DUI conviction. A first offense generally results in a 120 day license suspension. A repeat offense within ten years can result in a two year license revocation, a substantially longer consequence than the first offense suspension period. These administrative license actions are separate from any criminal court proceeding and its associated penalties.
During a period of alcohol restricted driving status, a person convicted of DUI is prohibited from having any measurable amount of alcohol in their system while driving, under Code Section 41-6a-530. Violating this restriction is itself a class B misdemeanor. The Utah Driver License Division alcohol-restricted driver information confirms the specific duration that applies following a particular conviction.
Ignition Interlock Device Requirements
Code Sections 41-6a-518 and 41-6a-518.2 require certain DUI offenders to install an ignition interlock device before they can legally resume driving. An ignition interlock device is a breath testing unit wired into a vehicle’s ignition system that prevents the engine from starting if it detects alcohol on the driver’s breath. This requirement generally applies for a set period following a qualifying DUI conviction.
An interlock restricted driver may only legally operate a vehicle equipped with the required device during the restriction period, rather than facing a complete driving ban. Utah’s interlock program has included a camera requirement on interlock devices since March 12, 2024, which helps verify that the person providing the breath sample is the authorized driver. See the Utah Driver License Division ignition interlock restriction information for the full restriction process.
Utah’s 2026 Interdicted Person Law
Utah House Bill 437, Interdicted Person Amendments took effect on January 1, 2026, creating a new legal status for certain extreme DUI convictions in Utah. This law applies specifically to convictions involving a BAC of 0.16% or higher, the same threshold used for the extreme DUI enhancement described earlier in this guide. It does not apply to standard DUI convictions below that BAC level.
A person designated as an interdicted person under House Bill 437 faces restrictions on purchasing alcohol and is issued a specially marked license or identification card reflecting this status. The designation is intended to prevent further alcohol purchases by individuals convicted of the most serious DUI offenses. This interdicted person system did not exist in Utah law before January 1, 2026, and represents a significant recent change to the state’s DUI framework.
Implied Consent and Chemical Testing
Utah operates under an implied consent framework, meaning that driving on Utah roads is treated as agreement in advance to chemical testing if a law enforcement officer has reasonable grounds to suspect DUI. This testing can include a breath, blood, or urine sample used to measure BAC or detect drugs. The implied consent rule applies to all licensed drivers operating a vehicle within the state.
Refusing a chemical test carries its own separate consequences under Utah law, distinct from any penalties tied to the underlying DUI charge itself. Because implied consent operates automatically upon driving in Utah, a driver cannot avoid its application simply by declining to sign any particular form at the time of a traffic stop. The specific administrative consequences of a refusal are handled through Utah’s driver license administrative process.
Common Misconceptions About Utah DUI Law
Many drivers assume a DUI charge requires the vehicle to be actively moving at the time of the stop. As explained earlier, Utah’s actual physical control standard means a person can face DUI charges while seated in a parked vehicle if they have the ability to operate it. This misconception can lead drivers to underestimate their legal exposure in situations that do not involve active driving on a roadway.
Another common misconception is that the 2026 interdicted person law under House Bill 437 applies broadly to any DUI conviction. In fact, this designation applies only to extreme DUI convictions at 0.16% BAC or higher, not to standard first or second offense convictions at lower BAC levels. Laws and enforcement may change, so readers should check official state sources for current rules rather than relying on this general overview. See the Disclaimer below.
Disclaimer
This article is for general informational purposes only. It is not legal advice. Lawwalls publishes informational content only and does not provide legal services or legal advice.
For legal advice about your specific situation contact a licensed attorney in your state. Laws change and vary by jurisdiction. Verify current rules with official government sources or a qualified lawyer.