Nevada DUI Laws — NRS 484C, Mandatory IID & Penalties

Nevada DUI Laws Explained

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A Nevada DUI arrest under NRS 484C triggers two parallel processes: a criminal case in Justice Court (or District Court for felony-level facts), and an administrative license revocation by the DMV. Since the 2018 statutory change, an ignition interlock device is mandatory on every DUI conviction, regardless of BAC — the threshold-based approach that applies in most states no longer applies in Nevada.

The legal threshold

Nevada's per-se DUI thresholds:

  • Adults 21+: 0.08% BAC.
  • Drivers under 21: 0.02% BAC under Nevada's zero-tolerance rule (separate administrative consequence, not a criminal DUI).
  • Commercial drivers (CDL): 0.04% BAC, the federal standard.
  • "Impaired driving": Nevada also charges DUI under NRS 484C.110 on impairment evidence below 0.08% — the prosecution must prove the driver was actually impaired by alcohol, drugs, or a controlled substance.

An enhanced charge applies when the BAC is 0.18% or higher, with longer mandatory IID and additional sentencing factors.

The 7-day administrative window

After a Nevada DUI arrest where the BAC was 0.08% or higher (or the driver refused chemical testing), the arresting officer typically takes the driver's Nevada driver license and issues a temporary 7-day driving permit. The administrative revocation begins on day 8 unless the driver requests a hearing in writing within 7 days of the notice.

The administrative revocation periods:

  • 90-day revocation for a first BAC-failure offense.
  • 1-year revocation for a second offense within 7 years.
  • 3-year revocation for a third offense within 7 years.
  • 1-year revocation for a first chemical-test refusal.

First-offense criminal penalties

A first DUI in Nevada is a misdemeanor (unless aggravating factors elevate it). The penalty package typically includes:

  • Jail time of 2 to 180 days — often suspended on first offenses without aggravating factors.
  • Fine of $400 to $1,000, plus court costs and surcharges.
  • License revocation of 90 days, separate from any administrative revocation.
  • Mandatory Victim Impact Panel attendance — a one-evening program where DUI victims and family members speak to convicted drivers.
  • Mandatory DUI school (an 8-hour education program) for any first-offense conviction.
  • Substance-abuse evaluation and any treatment recommended.
  • Mandatory ignition interlock device for at least 6 months for any restricted license during revocation and any reinstated license afterward.
  • SR-22 financial responsibility filing for 3 years — see Nevada car insurance.
  • Probation for up to 3 years.

Aggravating factors

Nevada escalates penalties when any of these apply:

  • BAC at or above 0.18% (high-BAC enhancement — longer IID at minimum 12 months, longer probation).
  • An accident with bodily injury (DUI causing substantial bodily harm is a category B felony, 2-20 years prison).
  • An accident with death (DUI causing death is a category B felony, 2-20 years prison; vehicular homicide on a third DUI is a category A felony).
  • A prior DUI within the 7-year lookback window.
  • Refusal of chemical test (treated as a separate revocation).
  • A passenger under 15 in the vehicle (sentencing enhancement).

Repeat offenses

A second DUI within 7 years carries:

  • Mandatory minimum 10 days in jail, up to 6 months.
  • Fine $750-$1,000.
  • 1-year license revocation with no eligibility for restricted license for first 90 days.
  • Mandatory IID for at least 12 months.
  • Mandatory residential or outpatient treatment program.

A third DUI within 7 years is a category B felony — 1 to 6 years in state prison, $2,000-$5,000 fine, and a 3-year license revocation. The third DUI within 7 years counts forever for purposes of any future fourth-or-greater offense, even if the second DUI eventually rolls off the lookback window.

Mandatory ignition interlock

Nevada's 2018 statutory change requires an IID for any DUI conviction, regardless of BAC, for any restricted license issued during revocation and any reinstated license afterward. The minimum periods:

  • First offense: at least 6 months.
  • Second offense: at least 12 months.
  • Third offense: at least 36 months.
  • BAC 0.18% or higher: at least 12 months on first offense.

The device is installed at the driver's expense (typically $70-$100/month plus a $100-$150 install fee), reports rolling-test results to the DMV, and prevents the vehicle from starting on a measurable BAC. Failed tests during the lookback period extend the IID requirement.

Underage zero-tolerance

Drivers under 21 with a BAC of 0.02% or higher face an automatic 90-day license suspension on the first offense and 1 year on the second. These are administrative actions handled separately from any criminal DUI charge — see Nevada teen license for how the under-18 framework applies, and Nevada points for how the conviction stacks on the driver record.

Vehicle impoundment

Nevada law authorizes vehicle impoundment for arrests involving a BAC at or above 0.18% or for second-or-higher DUIs within 7 years. The impound runs at the owner's expense at a police-contracted yard until the vehicle is released. The cost typically runs $200-$400 plus daily storage fees.

Official sources

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