Utah DUI laws make it a crime to drive with a blood or breath alcohol concentration of 0.05% or higher, or to drive while impaired by alcohol or drugs at any measurable level. A conviction brings mandatory fines, a separate administrative license suspension, an ignition interlock requirement, and jail time that increases with each offense. A third DUI within ten years is a felony.
What Counts as a DUI
You can be charged two ways. The first is a “per se” violation: your blood or breath alcohol concentration measured at 0.05% or above. The second is an impairment-based charge, where prosecutors prove you were too impaired to safely operate the vehicle regardless of your BAC.1Utah Legislature. Utah Code 41-6a-502 – Driving Under the Influence of Alcohol, Drugs, or a Combination of Both The impairment theory means an officer can arrest you even if you blow below 0.05%, as long as driving patterns, field sobriety tests, or other evidence show you couldn’t drive safely.
The statute defines “vehicle” broadly. Passenger cars and trucks are covered, but so are off-highway vehicles and motorboats.2Utah Legislature. Utah Code 41-6a-501 – Definitions Location doesn’t matter either. Public road, private lot, your own driveway. What matters is whether you were operating or in actual physical control of the vehicle.
p>The 0.05% threshold is Utah’s general rule. Two lower limits apply to specific drivers. Commercial driver’s license holders violate the law at 0.04%, consistent with federal rules.3Federal Motor Carrier Safety Administration. Driver Disqualified for Driving a CMV While Off-Duty With a Blood Alcohol Concentration Over 0.04 Percent Drivers under 21 face a zero-tolerance rule, where any measurable alcohol on a chemical test is enough.4Utah Legislature. Utah Code 53-3-231 – Person Under 21 May Not Operate a Vehicle or Motorboat With Detectable Alcohol in Body
Chemical Testing and What Happens If You Refuse
Driving on Utah roads counts as consent to chemical testing when an officer has reasonable grounds to suspect impairment. The officer can request a breath, blood, urine, or oral fluid test, and is required to explain the consequences of refusing before the test is given.
Refusing does not keep the state from getting evidence. Utah operates on a no-refusal approach: if you decline, the officer can seek an expedited warrant for a blood draw, and judges are available around the clock to sign one. What refusal does do is trigger a longer license suspension than failing the test would, and it adds a separate ignition interlock restriction on top.
The License Suspension That Starts at Arrest
A DUI arrest sets off two separate cases. One is the criminal case in court. The other is an administrative license suspension handled by the Utah Driver License Division. They run independently, so you can lose your license even if the criminal charges are later reduced or dismissed.
When you fail or refuse a chemical test, the officer seizes your license on the spot and issues a temporary permit good for 29 days. You have 10 calendar days to request a hearing to challenge the suspension. Miss that window and the suspension takes effect automatically.
How long the suspension lasts depends on whether you failed or refused, and whether you have prior offenses:
- Failed chemical test, first offense: 120 days.
- Failed chemical test, second offense within 10 years: two years.
- Test refusal, first refusal: 18 months.
- Test refusal, second refusal within 10 years: three years.
Criminal Penalties by Offense
A first or second DUI is a Class B misdemeanor, which carries up to six months in jail. The charge is elevated to a Class A misdemeanor, punishable by up to one year in jail, when any of the following aggravators are present:5Utah Department of Justice. Utah DUI Statutory Overview
- A passenger under 16 was in the vehicle.
- A passenger under 18 was in the vehicle and the driver was 21 or older.
- The driver was going the wrong way on a divided or controlled-access highway.
The mandatory minimum fine is $700, but a 90% surcharge and court security fee push the actual amount to roughly $1,390 in justice court or $1,383 in district court.5Utah Department of Justice. Utah DUI Statutory Overview Every conviction also requires a substance abuse evaluation and completion of any treatment the evaluator recommends, at your expense.
A second DUI within 10 years adds a mandatory minimum of 10 days in jail. Courts can allow alternatives such as house arrest or electronic monitoring, and in some cases can substitute 240 hours of community service. The administrative suspension for a second offense is two years.
A third DUI within 10 years is a third-degree felony. The minimum jail sentence rises to 62 days, and the maximum reaches five years in state prison. Fines climb past $2,500 with surcharges. A felony conviction also carries collateral consequences that a misdemeanor doesn’t: it can bar you from certain jobs, disqualify you from firearm ownership, and complicate housing applications.
Ignition Interlock Requirement
Every DUI conviction in Utah requires an ignition interlock device. The IID is a breath-testing unit wired into the ignition; if it detects alcohol above roughly 0.02%, the vehicle won’t start. The length of the requirement depends on your age at arrest:6Utah Driver License Division. Ignition Interlock Device
- 21 or older at arrest: 18 months.
- Under 21 at arrest: three years.
- Subsequent offenses: longer periods, depending on the circumstances.
Drivers who refuse chemical testing face a separate three-year IID restriction on top of their license suspension. The device has to be calibrated and its data downloaded every 30 to 45 days. Installation runs $50 to $100, with monthly lease and monitoring fees of $75 to $90. Over an 18-month requirement, the device alone can cost $1,500 or more.
While the IID is installed, you are classified as an alcohol-restricted driver. You cannot drive with any detectable alcohol in your system.
Insurance and SR-22
A DUI conviction requires you to file an SR-22 certificate, which is proof of financial responsibility that your insurer submits to the state. It must remain in effect for at least three years. Any lapse, from a missed payment or a canceled policy, triggers an automatic license suspension.
The SR-22 filing fee is small, typically $15 to $50. The real cost is the premium increase. Rates commonly double or triple after a DUI and stay elevated for the full SR-22 period and often longer. Combined with fines, surcharges, IID costs, treatment, and lost income, the total financial hit from a first DUI routinely runs $10,000 or more.
Underage DUI
Utah’s “Not a Drop” rule for drivers under 21 has no minimum threshold. If a chemical test picks up any measurable alcohol at all, you have a violation. A first offense brings a minimum six-month license denial that begins on the 45th day after arrest. A second offense within 10 years triggers a two-year suspension, or denial until age 21, whichever is longer.4Utah Legislature. Utah Code 53-3-231 – Person Under 21 May Not Operate a Vehicle or Motorboat With Detectable Alcohol in Body An underage driver who blows 0.05% or higher faces the full adult criminal penalties on top of these license consequences.
Commercial Drivers
CDL holders face a separate penalty track. A first DUI conviction disqualifies you from operating a commercial motor vehicle for at least one year. If you were hauling hazardous materials, that disqualification is three years. A second DUI from a separate incident triggers a lifetime CDL disqualification. Reinstatement is possible only after completing an approved rehabilitation program, waiting at least 10 years, and meeting all Driver License Division standards.7Utah Legislature. Utah Code 53-3-414 – CDL Disqualification or Suspension — Grounds and Duration — Procedure These consequences apply even when the DUI happened in your personal vehicle.
Medical Cannabis
Utah generally prohibits driving with any measurable controlled substance in your body, and that rule would otherwise catch lawful medical cannabis users. The statute carves out two protections. An affirmative defense is available to medical cannabis cardholders who used cannabis in a medicinal dosage form consistent with the state program. And the presence of the inactive metabolite 11-nor-9-carboxy-THC alone, the compound that lingers long after impairment is gone, does not count as a violation.8Utah Legislature. Utah Code 41-6a-517 – Driving With Any Measurable Controlled Substance in the Body
Neither protection covers you against an impairment-based DUI charge under 41-6a-502. If prosecutors can show cannabis actually impaired your driving, the medical card does not help. The metabolite exception also fails if active THC or any other controlled substance shows up alongside the inactive one.
Clearing a DUI From Your Record
Misdemeanor DUI convictions can be expunged in Utah, but only after a 10-year wait from the date of conviction. All fines, restitution, and interest must be fully paid, you cannot be on probation or parole or incarcerated, and no pending criminal case or active protective order can be in place.9Utah Department of Public Safety. Expungements Eligibility is measured against your entire criminal history, including out-of-state convictions and prior expungements.
Felony DUI convictions cannot be expunged. The Bureau of Criminal Identification lists felony DUI as a specific ground for denial, so a third-offense conviction stays on your record permanently.9Utah Department of Public Safety. Expungements