What Are the Penalties for a First DUI in Idaho?

A first DUI feels overwhelming, especially if you have never been in trouble before. The good news is that a first-offense DUI in Idaho is generally a misdemeanor, not a felony. The harder truth is that it still carries real consequences that can affect your license, your wallet, and your record.

Here is a general picture of what a first DUI can mean in Idaho.

Possible criminal penalties

A standard first-offense misdemeanor DUI in Idaho can carry up to six months in county jail under Idaho Code § 18-8005(4). A first excessive DUI (BAC 0.20 or higher) can carry different penalties under § 18-8004C. In practice, many first offenses do not result in the maximum jail sentence. Instead, courts often impose a combination of:

• Fines and court costs
• Probation
• Alcohol evaluation and education or treatment
• Community service

The exact outcome depends on the facts of your case, your blood alcohol level, and how the case is handled.

License suspension

A DUI in Idaho involves two separate tracks. One is the criminal case in court. The other is an administrative license suspension through the Idaho Transportation Department.

The administrative suspension can begin before your criminal case is resolved, and you have a limited window to request a hearing to challenge it. Missing that deadline can cost you your license even if things go well in court. This is one of the most common and avoidable mistakes people make after a first DUI.

Ignition interlock and other conditions

Depending on the case, the court may require an ignition interlock device, which prevents a vehicle from starting if it detects alcohol. You may also face higher insurance costs and other conditions tied to probation.

Why a first DUI is still worth fighting

Because a first DUI is a misdemeanor, some people assume it is not worth hiring a lawyer. That is a mistake. A conviction goes on your record, affects your insurance, and counts as a prior if you are ever charged again. A second DUI is treated much more seriously than a first.

There may also be real defenses. The traffic stop, the field sobriety tests, and the breath or blood testing can all be examined. If something was done incorrectly, it can change the case.

Get advice early

The first days after a DUI matter, especially because of the license suspension deadline. Getting advice early protects both your license and your defense.

Browning Law defends first-offense and repeat DUI cases in Idaho Falls and across Eastern Idaho. Learn more on our DUI lawyer in Idaho Falls page, or call (208) 542-2700 for a free consultation.

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This article provides general information about Idaho law as of 2026. It is not legal advice for any specific situation. Idaho Code §§ 18-8002, 18-8004, 18-8004C, 18-8005, and 18-8006 are referenced where applicable. Consult an attorney about your individual circumstances.