Overview
Idaho DUI Laws
Idaho DUI law at a glance
Sourced from the Idaho code and state agency sites. Verify current text before relying on it.
- Offense name
- DUI (Idaho)
- Controlling statute
- Idaho Code § 18-8004
- Implied consent
- Idaho Code § 18-8002
- Per se BAC limit
- 0.08 (0.04 CDL, 0.02 or lower under 21)
- Licence hearing deadline
- 7 days after arrest
- Prior-offense lookback
- 10 years
- First-offense fine
- up to $1,000
- First-offense jail exposure
- up to 6 months
- Licence suspension
- 6 months
- Ignition interlock
- Not automatic on a first offense
- High-risk filing
- SR-22 for 3 years
A first offense is a misdemeanor with possible jail and a licence suspension.
What Idaho Code § 18-8004 actually says
A charge in Idaho is brought under one or more of these subsections.
- Idaho Code § 18-8004(1)(a) — unlawful to drive under the influence of alcohol, drugs or another intoxicating substance, or with an alcohol concentration of 0.08 or more.
- Idaho Code § 18-8004 sets the alcohol concentration threshold and the methods of proof for a DUI prosecution.
- Idaho Code § 18-8002 governs the consequences of refusing evidentiary testing.
Penalties & Fines
When DUI Becomes a Felony
Court Costs & Fees
Legal Process
A DUI case in Idaho is heard in the Magistrate Division of the District Court, and it runs on two tracks at once: the criminal case and a separate licence action you must challenge within 7 days of arrest.
- 1Arrest, booking and the chemical test — Officers arrest for DUI under Idaho Code § 18-8004 and request a breath, blood or urine test under Idaho's implied-consent section, Idaho Code § 18-8002. Refusing carries its own licence penalty, separate from the criminal charge.
- 2Licence action — request a hearing within 7 days — The ALS is a civil suspension imposed for failing or refusing a blood, breath or urine test after a DUI arrest. You have 7 days from arrest to demand the administrative hearing with Idaho Transportation Department, Division of Motor Vehicles; miss it and the suspension takes effect automatically, whatever happens in court.
- 3Arraignment in the Magistrate Division of the District Court — The charge is read, a plea is entered and conditions of release are set in the Magistrate Division of the District Court. Idaho's magistrate division of the district court handles misdemeanor DUI, a first or second offense, while a district judge tries felony DUI — a third offense within ten years, or DUI causing injury or death.
- 4Pretrial motions and discovery — Defence counsel obtains the police report, test records and calibration or maintenance logs, and may move to suppress the stop or the test result. Idaho courts file through the statewide iCourt system.
- 5Plea or trial, then sentencing — A first DUI conviction carries a fine of up to $1,000, jail exposure up to 6 months, a licence suspension of 6 months. Prior offenses within 10 years push the case into the enhanced-penalty range. A first offense is a misdemeanor with possible jail and a licence suspension.
- 6Reinstatement — A first ALS carries a 90-day suspension: 30 days absolute, then 60 days during which a restricted permit is possible. Idaho requires a SR-22 certificate of financial responsibility for 3 years before the licence is restored.
Idaho's magistrate division of the district court handles misdemeanor DUI, a first or second offense, while a district judge tries felony DUI — a third offense within ten years, or DUI causing injury or death. Appeals from a magistrate DUI decision go to the district court, and from there to the Idaho Court of Appeals or Supreme Court.
Filing and procedure in Idaho
- Idaho courts file through the statewide iCourt system.
- The Administrative Licence Suspension is a civil action separate from the criminal DUI case.
- The Idaho Transportation Department administers suspensions triggered by failing or refusing a chemical test.
- A Restricted Driving Permit (form ITD 3227) allows limited driving during part of a suspension.
Court tiers, appeal deadlines and diversion rules for every Idaho county are listed on the Idaho court reference.
Defense Tactics & How to Get a DUI Dismissed
Post-Conviction Class Requirements
License Reinstatement Process
Ignition Interlock Device (IID)
Car Insurance After a DUI
Rehab & Treatment Programs
CDL & Commercial Driver Consequences
Underage / Zero-Tolerance Laws
Drug DUI (DUID)
Expungement & Record Sealing
Frequently Asked Questions
Local Resources for Idaho
These are the offices and helplines most Idaho drivers need in the weeks after an arrest. Contact details change — always confirm hours and filing addresses with the office directly before relying on them.
Courts, licensing and statutes
- Idaho court directory
Official judiciary directory of the courts, judges and clerk offices in every county.
- Idaho Transportation Department, Division of Motor Vehicles
The ALS is a civil suspension imposed for failing or refusing a blood, breath or urine test after a DUI arrest.
- Idaho Code § 18-8004 — Idaho DUI statute
The offense, BAC limits and sentencing ranges in the state's own words.
Treatment and support
- SAMHSA treatment locator (findtreatment.gov)
Federal directory of licensed alcohol and substance-use treatment providers, searchable by ZIP code.
- SAMHSA national helpline — 1-800-662-4357
Free, confidential, 24/7 referral service for treatment and support groups.
- 988 Suicide & Crisis Lifeline
Call or text 988 for immediate mental-health crisis support.
- NHTSA impaired-driving research
Federal crash and enforcement data behind the statistics cited on this page.
Primary Sources & Legal References for Idaho
Every claim on this page is grounded in the primary sources below — the official Idaho statutes, the ID driver-licensing agency, and the state judiciary's court directory. Use these links to verify current language directly with the issuing authority.
- First-offense penalty scheduleGHSA — State alcohol-impaired driving laws
- SR-22 / FR-44 financial responsibilityInsurance Information Institute — SR-22 explained
- Idaho trial courts (case filings, dockets)Idaho Judiciary — official court directory (isc.idaho.gov)Use the official directory to confirm the courthouse, address and docket access.
- ID driver-licensing agency (license suspension & reinstatement)Official ID DMV/driver services (itd.idaho.gov)
- Idaho official code / statutesFull Idaho statutes as published by the state (legislature.idaho.gov)
Idaho DUI sources
- radarcart.boisestate.edu/library/files/2017/07/IdahoBAC.pdf
- nlp.biu.ac.il/~ravfogs/resources/embeddings-alignment/glove_vocab.250k.txt
- archive.org/stream/The_Times_News_Idaho_Newspaper_1981_08_27/The_Times_News_Idaho_Newspaper_1981_08_27_djvu.txt
- archive.org/stream/The_Times_News_Idaho_Newspaper_1980_07_18/The_Times_News_Idaho_Newspaper_1980_07_18_djvu.txt
- tfpl.sfo2.digitaloceanspaces.com/Newspapers/Times-News_TF340/PDF/1978_03_21.pdf
Sources retrieved live by our Perplexity-powered research pipeline. Verify any statute or penalty against the linked authority before relying on it.
What to do in the next 24–72 hours
- Request your DMV / ALR hearing. In Idaho you have 7 days from arrest to request the hearing — miss it and the suspension takes effect automatically.
- Save every document. Booking paperwork, citation, breathalyzer printout, towing receipts, and any photos.
- Don't post about your case online. Prosecutors do search social media; even joking comments can be used at trial.
- Get a local DUI attorney. A ID attorney familiar with the local prosecutors and judges is the single biggest factor in outcomes.
- Estimate your costs and exposure. Use our calculators below to plan financially.
Estimate your blood alcohol level by drinks, weight and time. Compare against the 0.08 ID limit.
See your likely fine, court costs, IID, insurance and attorney fees for a DUI in Idaho.
DUI glossary
- BAC
- Blood Alcohol Concentration. The legal threshold is 0.08 in most states.
- Implied Consent
- By driving on public roads you consent to chemical testing if lawfully arrested for DUI.
- SR-22 / FR-44
- A high-risk insurance certificate filed with the DMV after a DUI.
- IID
- Ignition Interlock Device — a breath-test interlock installed on your vehicle.
- Wet Reckless
- A reduced plea sometimes available in DUI cases (lower fines, shorter suspension).
- ALR Hearing
- Administrative License Revocation hearing with the DMV. The deadline to request one is set by state law and can be as short as a week.
- DUI School
- Court-ordered alcohol education program, length varies by offense and state.
- Per Se DUI
- DUI based solely on BAC ≥ 0.08, regardless of impairment evidence.
- FST
- Field Sobriety Tests — walk-and-turn, one-leg-stand, HGN.
- Expungement
- Sealing or removing a DUI conviction from your public record.
Talk to a ID DUI attorney
Most DUI defense lawyers offer a free initial consultation. A local attorney familiar with Idaho courts can review your arrest, identify procedural defenses (illegal stop, faulty FSTs, breathalyzer calibration), and negotiate a reduced charge such as wet reckless. Don't represent yourself.
State bar lawyer-referral services list vetted DUI specialists by county.