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Idaho DUI Laws

DUI Defense in Idaho

Statutes, Penalties, and Defense Strategies

What you are facing, the deadlines that bind you, and the questions an attorney needs to answer — under Idaho (ID) DUI law.

BAC Limit

0.08

Enhanced BAC

0.20

Higher penalties above this

Lookback Period

10 years

Prior offenses count within

⚠

7 days-Day DMV Hearing Deadline

Idaho gives you 7 days days from the arrest to ask for a DMV hearing. This is the

administrative hearing

Plain language

A DMV review of the license suspension — separate from the criminal court case, with its own paperwork and deadline.

that decides the license suspension. Miss the deadline and the suspension starts on its own, even if the criminal case ends in dismissal later.

First Offense Penalties in Idaho

Jail TimeUp to 6 months
FinesUp to $1,000
License Suspension90 – 180 days
Ignition Interlock

Plain language

A breath-tester wired into the car ignition. The car will not start without a clean sample.

Required for BAC 0.20+ (1 year)

Implied Consent and Test Refusal

Idaho has an

implied consent law

Plain language

By driving on the state's roads, you have already agreed to a chemical test if an officer has probable cause to think you are impaired.

like every state. The test can be breath, blood, or urine. Refusing carries its own penalty, listed below.

Refusal Penalty

1-year license suspension

Idaho-Specific Detail

Idaho's enhanced penalty threshold is 0.20, significantly higher than most states. The 7-day administrative hearing request deadline is one of the shortest in the country.

Is your Idaho DUI defense on track?

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DUI Defense Playbook — $127

26 questions that change how your next attorney meeting goes, a case stage roadmap, red flag checklist, and a case progress scorecard. Instant PDF download — calibrated for Idaho DUI defendants.

Get the DUI Playbook — $127Read the Free DUI Guide

Other Idaho defense topics

Facing a different charge in Idaho? Penalty ranges, enhancements, and defense questions for related crimes:

Drug Possession in IdahoAssault in IdahoDomestic Violence in Idaho

Important: This page provides general legal information about Idaho DUI laws as of the date of publication. Laws change frequently. This is not legal advice. For guidance specific to your case, speaking with a Idaho-licensed attorney is one option, or take the free Masked Researcher’s First Read to see where your case stands.