About DUI/DWI
DUI (driving under the influence) and DWI (driving while intoxicated) are the two most common labels for the criminal offense of operating a motor vehicle while impaired by alcohol or drugs. Every US state criminalizes the same core conduct, but the specific name, blood-alcohol-concentration (BAC) limit, penalties, and license-suspension rules vary by state.
The standard BAC threshold for adult non-commercial drivers is 0.08% nationwide, dropped to 0.05% in Utah. For commercial drivers the federal limit is 0.04% under 49 CFR §383.51, and for drivers under 21 most states enforce a zero-tolerance limit between 0.00% and 0.02%.
A DUI arrest typically triggers two parallel proceedings: a criminal case in court and an administrative license suspension handled by the state DMV. The administrative case usually has a much shorter deadline — often only 7 to 15 days from arrest to request a hearing — and operates independently of whether the criminal case results in a conviction. Missing the administrative deadline almost always means automatic license suspension regardless of the criminal outcome.
Penalties for a first-offense DUI generally include fines from $500 to $2,000, a license suspension of 90 days to 1 year, mandatory alcohol-education classes, and in many states, a required ignition interlock device. A second offense usually doubles the fines and suspension period. A third offense is a felony in most states. DUI causing injury (DUI w/injury) is a felony in every state.
Out-of-state DUI convictions are reported through the Driver License Compact, an interstate agreement that 45 states have signed. Your home state will normally treat an out-of-state DUI as if it had happened locally — meaning a Florida DUI for a California-licensed driver will trigger California license suspension.
Refusing a chemical test (breath, blood, or urine) is itself a separate offense in every state under implied consent laws. Refusal usually triggers a longer license suspension than a DUI conviction itself and can be used as evidence at trial.
Because DUI cases combine criminal procedure, administrative law, and technical evidence (BAC machines, field sobriety tests, blood-draw protocols), most defendants benefit from consulting a DUI attorney within the first 10 days after arrest.
Reviewed by AttorneyQnA Editorial Team · Last updated
Relevant law
-
49 CFR §383.51 RegulationCommercial driver disqualification tableFederal regulation listing offenses (including DUI/DWI) that disqualify a commercial driver's license. First DUI: 1-year CDL disqualification. Second: lifetime ban (potentially reduced after 10 years).
-
NHTSA Implied Consent Laws AgencyState-by-state implied consent statutesNational Highway Traffic Safety Administration overview of every state's implied-consent law. Every US state criminalizes chemical-test refusal with administrative license suspension; many also charge it as a separate offense.
-
Interstate Driver License Compact (DLC)45-state interstate agreement under which member states report out-of-state DUI convictions to the driver's home state for license action. Non-member states are Georgia, Massachusetts, Michigan, Tennessee, and Wisconsin.
Common questions about DUI/DWI
How long does a DUI stay on my record?
Should I refuse the breath test if I'm pulled over for DUI?
Can I get a DUI on prescription medication?
Do I have to appear in court for a DUI?
Will a DUI affect my job?
How much does a DUI attorney cost?
Will my insurance go up after a DUI?
0 Attorney Answers
No answers yet
This question is waiting for an attorney to respond.