DUI Laws Across the United States

By Javier Marín, Editor·Last reviewed September 2026·How we check this

Driving under the influence is the most legally consequential thing most American drivers can do behind the wheel. The federal threshold of 0.08% blood alcohol concentration applies in every state, but everything that happens after a stop — the testing process, the penalties, the path back to a valid license — varies enormously by jurisdiction.

This page walks through the universal mechanics first and then highlights the state-by-state differences. For penalties specific to your state, follow the link to your state guide.

DUI vs. DWI: are they different?

Most states use one of two acronyms, and a few use both. DUI (Driving Under the Influence) and DWI (Driving While Intoxicated, or Driving While Impaired) are nearly synonymous in most jurisdictions. New York, Texas, and a few other states distinguish between them — DWI for higher-BAC offenses, DUI for an "ability impaired" offense at lower BAC. Regardless of name, both are recorded on your driving record, both trigger administrative license actions, and both carry significant insurance consequences.

The .08 limit and exceptions

Adults (21+): .08% BAC is the legal threshold in 49 states and DC.
Utah: .05% BAC since 2019. Utah is the only state with a sub-.08 adult threshold; several legislatures have proposed similar moves.
Commercial drivers (CDL): .04% BAC under federal regulation, regardless of which state issued the CDL. See commercial license.
Drivers under 21: "Zero tolerance" in every state. The threshold is typically .02% or .01%, with some states treating any detectable alcohol as a violation.

Implied consent

Every state has an "implied consent" law: by accepting a driver's license, you've agreed to submit to a chemical test (breath, blood, or urine) when an officer has probable cause. Refusing the test typically triggers an automatic license suspension under administrative law — separate from any criminal DUI charge — that lasts six months to a year for a first refusal and longer for repeats. In most states, refusal can also be introduced as evidence at a subsequent DUI trial.

First-offense penalties

The exact numbers vary, but a typical first-offense DUI in the United States produces:

A misdemeanor conviction on the criminal record.
A driver's license suspension of 90 days to 1 year.
Fines of $500 to $2,000.
Mandatory alcohol-education or victim-impact classes.
Possible jail time of 24 hours to 6 months (often suspended for first offenses).
An ignition-interlock device requirement for some or all of a hardship-license period.
Three to five years of SR-22 insurance filing.
Insurance rate increases of 30% to 80% for at least three renewal cycles.

Repeat-offense escalation

Every state escalates penalties sharply for second and subsequent offenses within a "lookback" window. The lookback ranges from 5 years (Connecticut, New Jersey) to lifetime (Hawaii, Massachusetts). A second offense almost always means longer mandatory jail time, an ignition-interlock requirement on the driver's primary vehicle, and significantly higher fines. Third and subsequent offenses become felonies in most states.

Aggravating factors

Penalties stack up faster when any of these apply:

BAC at or above .15% (sometimes .20%) at the time of the test.
An accident with injury or property damage.
A child passenger in the vehicle.
Driving on a suspended or revoked license at the time of arrest.
Refusing a chemical test.

Hardship and ignition-interlock licenses

Most states offer some form of conditional or "hardship" license that lets a DUI offender drive to work, school, treatment programs, and medical appointments during the suspension period. Eligibility usually requires installation of an ignition-interlock device at the offender's expense (typically $70 to $150 per month plus a $100 install fee), enrollment in a treatment program, and SR-22 insurance certification. Some states require a waiting period — often 30 to 90 days — before any conditional license is available.

Drug-related DUI

Drug-impaired driving is illegal in every state regardless of whether the substance is legal. Marijuana DUI laws are the most rapidly evolving area: some states use a per-se THC limit, others rely on field-sobriety evidence, and prosecutorial standards continue to shift. If you're prescribed a medication that could impair driving — opioids, benzodiazepines, certain antidepressants and sleep aids — you can be charged with DUI even when the prescription is current and used as directed.