DUI Laws in Utah: Penalties, BAC Limits & License Suspension

In Utah, drunk or drugged driving is charged as DUI — Driving Under the Influence — under Utah Code § 41-6a-502. Utah is the only state in the country with a 0.05% per se blood alcohol concentration (BAC) limit for drivers 21 and older, lower than the 0.08% used almost everywhere else. If you're arrested, you also face a separate, fast-moving clock: you have only 10 calendar days from the date of arrest to request a hearing with the Utah Driver License Division (DLD) to contest the automatic suspension of your license — miss it, and you lose the right to fight that suspension. This guide walks through what the charge is called, the BAC thresholds, refusal penalties, the administrative suspension deadline, first-offense consequences, and when a DUI becomes a felony in Utah.

Quick Answers for Utah

• Charge name: DUI (Driving Under the Influence), Utah Code § 41-6a-502.
• Per se BAC limit: 0.05% for standard drivers 21+ (the lowest in the nation); 0.04% for commercial (CDL) drivers; zero-tolerance ("Not a Drop," effectively 0.00%) for drivers under 21.
• DMV hearing deadline: 10 calendar days from arrest to request a Driver License Division hearing, or the suspension becomes final.
• First refusal suspension: 18 months, automatic, separate from any criminal case.
• Lookback period: 10 years for counting prior DUIs toward enhanced charges.

Utah's Per Se BAC Limits

Utah lowered its standard DUI threshold to 0.05% BAC effective December 30, 2018, making it the strictest per se limit in the United States (every other state uses 0.08%). That means a driver 21 or older can be charged with DUI in Utah at a BAC of 0.05% or higher, even without other signs of impairment.

• Standard limit (21 and older): 0.05% BAC or higher.
• Commercial driver's license (CDL) holders: 0.04% BAC or higher while operating a commercial vehicle — this federal floor applies in every state, including Utah.
• Under 21 ("Not a Drop" law, Utah Code § 53-3-231): Utah has a zero-tolerance policy. Any detectable amount of alcohol in a driver's system — effectively 0.00% — can result in a "Not a Drop" violation, separate from a standard DUI charge.

Utah law also treats a notably higher BAC (commonly cited around 0.16%) as an aggravating factor that can affect sentencing and the length of ignition-interlock requirements. Because how that threshold is applied can depend on the specific charge and court, confirm the current treatment with the Driver License Division or a Utah defense attorney rather than relying on a fixed number.

Impairment-based DUI is also possible below these numbers: Utah can still charge DUI if alcohol or drugs — including impairing prescription or over-the-counter medication — render a driver incapable of safely operating a vehicle, regardless of BAC.

Implied Consent and Refusing a Breath or Blood Test

By driving on Utah roads, you've already agreed to Utah's implied consent law (Utah Code § 41-6a-520): if an officer has reasonable grounds to believe you're impaired and lawfully arrests you, you're deemed to have consented to a chemical test of your breath, blood, or urine. Refusing that test does not avoid a DUI arrest — it triggers its own automatic license consequences and can be used as evidence against you in court.

• First refusal (age 21+): automatic 18-month license revocation.
• Second refusal within 10 years (age 21+): automatic 36-month revocation.
• Refusal by a driver under 21: revocation until age 21 or 2 years, whichever is longer.

These revocation periods are separate from — and generally longer than — the suspension for simply failing a chemical test. Refusing does not make the underlying DUI case go away; you can still be prosecuted based on officer observations, field sobriety tests, and other evidence.

The Administrative License Suspension — and Your 10-Day Deadline

Utah's Driver License Division (DLD), part of the Department of Public Safety, can suspend or revoke your license administratively based on the arrest itself, independent of whatever happens in criminal court. This is sometimes called an administrative license suspension or revocation, and it runs on its own separate timeline.

This is the single most time-critical step after a Utah DUI arrest: you have only 10 calendar days from your arrest date to request a DLD hearing to contest the suspension. Weekends and holidays count toward that window, and Utah generally does not grant extensions for missing it. If you don't submit a request in time, you forfeit the right to challenge the administrative action, and your license will be suspended on the date specified in the DLD's notice.

Hearing requests can be submitted online or on paper through the Driver License Division at dld.utah.gov. If you're past the 10-day window, DLD may allow a late request only if you attach documentation explaining why it's late — approval isn't guaranteed.

First-Offense DUI Penalties in Utah

A first DUI conviction in Utah (for a driver 21 or older, no aggravating factors) is generally charged as a class B misdemeanor. Based on official guidance from the Utah Highway Safety Office and the Driver License Division:

• Administrative license suspension: 120 days for a first offense where a chemical test was failed (as distinct from the longer 18-month refusal revocation above).
• Ignition interlock device (IID): Utah requires an ignition interlock for essentially all DUI convictions. For a first offense, that's generally an 18-month interlock-restricted period for drivers 21 and older, and longer (commonly cited as 3 years) for drivers under 21 — confirm the exact period that applies to your case.
• Jail: Utah law sets a mandatory minimum — commonly described as at least 48 hours in jail, which a court may allow to be served as community service or home confinement instead — with up to the class B misdemeanor maximum of 6 months possible.
• Fines: A class B misdemeanor DUI carries a statutory base fine plus surcharges and court fees that substantially increase the amount actually owed. Do not rely on any specific dollar figure — confirm the current fine and surcharge structure with the court handling your case or the DLD.
• Other conditions: a substance abuse screening/assessment is typically required before reinstatement, and courts often impose probation.

If a passenger under 16 was in the vehicle at the time of a first or second DUI, Utah law elevates the charge to a class A misdemeanor, with a separate count possible for each such passenger.

How Prior DUIs Count Against You: the 10-Year Lookback

Utah uses a 10-year lookback period to decide whether a new DUI counts as a first, second, or third offense. A prior DUI conviction that falls within 10 years of the current offense will enhance the charge — moving it from a class B misdemeanor toward a class A misdemeanor or felony. A conviction older than 10 years generally will not enhance a new charge, but confirm this with a Utah defense attorney, since how dates are calculated (arrest date vs. conviction date) can matter.

When DUI Becomes a Felony in Utah

Most first and second DUIs in Utah are misdemeanors, but the offense becomes a third-degree felony when:

• It is a third or subsequent DUI conviction within the 10-year lookback period; or
• The driver inflicted serious bodily injury on another person as a result of driving under the influence.

A DUI that results in someone's death can lead to separate, more serious felony charges (such as automobile homicide) under Utah law, on top of or instead of a standard DUI charge. Felony DUI carries substantially higher potential prison exposure and mandatory longer ignition-interlock and treatment requirements than a misdemeanor case. Exact sentencing ranges and conditions should be confirmed with the court or a Utah criminal defense attorney, since they can depend on the specific facts and any additional charges filed.

What to Do After a DUI Arrest in Utah

1. Note your arrest date immediately and count 10 calendar days. Submit a Driver License Division hearing request before that deadline — this is the step people most often miss, and it cannot be undone once the window closes.
2. Read every paper the officer or jail gave you, including any temporary permit and the notice of suspension, and keep it with your other case documents.
3. Do not drive on a suspended or revoked license while your case is pending — that can add new charges on top of the DUI.
4. Write down what you remember about the stop, testing, and any statements you made, while it's fresh.
5. Contact a Utah criminal defense attorney as soon as possible — ideally before your 10-day DLD deadline — since the same attorney can often handle both the administrative hearing and the criminal case.
6. Attend every scheduled court date and DLD hearing; missing either can result in additional suspension or a warrant.
7. Ask about the ignition interlock and reinstatement process early so you understand what's required before you can legally drive again.

This article is general legal information about Utah law, not legal advice for your specific situation — confirm current statutes, deadlines, and penalties with the Utah Driver License Division or a licensed Utah attorney.