Understanding DUI Charges in Idaho: Penalties and Defenses
- East Idaho Law
- Jul 31
- 4 min read
Driving under the influence (DUI) in Idaho is a serious offense with significant legal, financial, and personal consequences. Whether it’s your first time facing charges or you're familiar with the legal system, understanding the DUI laws in Idaho can help you make informed decisions. Learn about the penalties, legal process, and potential defenses to help you understand your rights and options when facing a DUI in Idaho.
What Constitutes a DUI in Idaho
A DUI in Idaho occurs when a person operates a motor vehicle under the influence of alcohol, drugs, or any intoxicating substances. The law sets clear limits:
A Blood Alcohol Concentration (BAC) of 0.08% or higher for drivers over 21
A BAC of 0.04% for commercial vehicle drivers
A BAC over 0.02% for drivers under 21 (zero tolerance policy)
DUI charges can also apply if a driver is impaired by drugs, including legal prescriptions or over-the-counter medications. Idaho law does not require a BAC result for a DUI charge—if impairment is evident, charges can still be filed.

DUI Penalties in Idaho
First-Time Offense
For a first DUI in Idaho, the penalties are serious but not as severe than repeat offenses:
Up to six months in jail
Fines up to $1,000
License suspension for 90 to 180 days
Mandatory alcohol education or treatment
Second and Subsequent Offenses
If you're convicted of a second DUI within 10 years, the penalties increase:
Jail time up to one year
Fines up to $2,000
License suspension for at least one year
Installation of an ignition interlock device upon license reinstatement
Aggravating Factors
Certain circumstances can lead to harsher penalties, such as:
BAC of 0.20% or higher
Causing injury or death in an accident
DUI with a child passenger
These can result in felony charges, longer incarceration, higher fines, and permanent license revocation.
The Legal Process After a DUI Arrest
Arrest and Booking
After being pulled over and tested, if officers suspect intoxication, they may place you under arrest. You will be taken to a police station for processing.
Administrative License Suspension
Idaho has an automatic license suspension policy. If you fail a BAC test or refuse to take one, your license can be suspended immediately, separate from any criminal charges.
Criminal Proceedings
You’ll be scheduled for an arraignment, where you can plead guilty or not guilty. The case may proceed to pretrial hearings and potentially trial.
DMV Hearings
You can request a separate hearing with the Idaho Transportation Department to challenge your administrative suspension. This must be done within a strict timeframe, usually seven days.

Possible Defenses Against DUI Charges
Challenging the Traffic Stop
If the officer lacked probable cause to pull you over, any evidence gathered during the stop could be inadmissible.
Questioning BAC Testing
Breathalyzer machines must be properly maintained and calibrated. Errors in testing procedures can result in flawed BAC results.
Medical Conditions or External Factors
Certain medical conditions or even foods and mouthwash can mimic signs of intoxication. An attorney can bring in expert witnesses to testify on your behalf.
Violation of Rights
If your Miranda rights weren’t read or if you were unlawfully detained, it could significantly impact the prosecution’s case.
Long-Term Consequences of a DUI Conviction
A DUI in Idaho can have lasting effects:
Increased auto insurance rates or loss of coverage
Barriers to employment, especially for jobs involving driving
Possible professional license revocation (for medical, legal, or commercial drivers)
A permanent criminal record
Importance of Legal Representation
DUI laws are complex, and penalties can escalate quickly. An experienced DUI attorney can:
Evaluate the evidence against you
Advise on plea deals or diversion programs
Represent you in court
Help reduce or dismiss charges depending on circumstances
Having legal representation ensures that your rights are protected and that you fully understand the implications of every decision.
Conclusion
A DUI in Idaho carries serious consequences that can impact many areas of your life. Understanding what constitutes a DUI, the penalties involved, and the defenses available to you is critical. Whether you're facing your first charge or a repeat offense, legal support can make a meaningful difference in your case's outcome.
If you or a loved one has been charged with a DUI in Idaho, contact East Idaho Law for a confidential consultation. Our experienced team will review your case, explain your rights, and fight to protect your future.
FAQ: DUI in Idaho
1. Is your license suspended immediately after a DUI in Idaho?Yes. If you fail or refuse a BAC test, Idaho law imposes an immediate administrative license suspension.
2. How much is a DUI charge in Idaho?Fines for a first DUI can be up to $1,000, but court fees, license reinstatement, treatment programs, and insurance increases can add thousands more.
3. How long does a DUI stay on your driving record in Idaho?A DUI remains on your driving record for life, but for sentencing purposes, prior offenses within the last 10 years are considered.
4. What happens when you get your first DUI in Idaho?You may face up to 6 months in jail, a fine up to $1,000, license suspension for 90-180 days, and mandatory alcohol education.
5. Can you drive after a DUI before a court date?Usually not, unless you successfully request a restricted license or challenge the administrative suspension.