A first DUI is charged as a misdemeanor in almost every state, as long as no one was injured, there were no other aggravating circumstances, and the driver’s blood alcohol concentration wasn’t drastically over the limit. Specific facts at the scene can push that same first offense into felony territory, with prison time measured in years instead of months. The question of whether a first DUI is a misdemeanor or felony turns almost entirely on those facts, not on prosecutorial discretion.
The Default: Misdemeanor
Most states treat a standard first-offense DUI as a misdemeanor. “Standard” means the driver’s BAC was at or above the legal limit (0.08% in every state except one, which uses 0.05%) but not drastically higher, no one was hurt, no children were in the vehicle, and the driver had a valid license.1National Conference of State Legislatures. Criminal Status of State Drunken Driving Laws A misdemeanor conviction can carry up to a year in county or local jail, fines, probation, and license suspension. A felony, by contrast, opens the door to state prison for more than a year and much larger fines.
A handful of states don’t treat a first DUI as a criminal offense at all. In those jurisdictions, it’s a traffic violation or civil infraction. Fines and license suspension still apply, but there’s no criminal conviction on the record. Repeat offenses in those states escalate to misdemeanor or felony status.1National Conference of State Legislatures. Criminal Status of State Drunken Driving Laws
When a First DUI Becomes a Felony
Certain facts automatically escalate a first DUI from misdemeanor to felony. These are built into the statute, not left to a prosecutor’s judgment. If any of these are present, the exposure changes fundamentally.
- Serious injury or death. If impaired driving caused a crash that seriously hurt or killed someone, the charge jumps to a felony in virtually every state. Charges like vehicular manslaughter or vehicular homicide may follow.
- Extremely high BAC. Many states set a second threshold, commonly 0.16% or higher. In some states this produces an “aggravated DUI” at felony level; in others it stacks mandatory minimum fines and community service onto the standard misdemeanor.
- A child in the vehicle. Driving impaired with a minor passenger is treated as a form of child endangerment. In many jurisdictions this single fact converts a misdemeanor DUI into a felony.
- Driving on a suspended or revoked license. If the license was already suspended for a prior driving-related issue, the combination frequently produces felony charges.
Two drivers arrested the same night at the same BAC can face wildly different charges. A 0.09% on a quiet road is a misdemeanor. A 0.09% after rear-ending a car and sending someone to the hospital is a felony.
What a Misdemeanor First DUI Actually Costs
A misdemeanor is still a layered sentence. Judges have discretion within statutory ranges, and outcomes vary, but the pieces are consistent.
Fines and Jail
Criminal fines run from a few hundred dollars to several thousand, depending on the state and BAC. Surcharges and assessment fees multiply what you actually pay. Roughly half the states impose a mandatory minimum jail sentence of 24 to 48 hours. Others let judges substitute probation, community service, or alcohol treatment. The statutory maximum is generally up to one year in county jail, though full-year sentences are rare for a first offense without aggravators.
License Suspension and Ignition Interlock
License suspension is nearly universal, typically 90 days to a year. Thirty-one states and the District of Columbia require ignition interlock devices for all DUI offenders, first-timers included.2National Conference of State Legislatures. State Ignition Interlock Laws Installation runs roughly $70 to $150, with monthly lease fees of $60 to $90, plus calibration charges. Most states require the device for at least a year.
Alcohol Education and Probation
Nearly every state requires completion of an alcohol education or treatment program, from a few hours to several weeks of classes. Probation for a first offense typically lasts one to three years with conditions: staying out of trouble, completing the alcohol program, random testing, and no refusal of future chemical tests. Community service hours vary by jurisdiction.
The Full Financial Picture
The fine on the court paperwork is a fraction of the real cost. The National Highway Traffic Safety Administration estimates a first offense can run upwards of $10,000 in fines and legal fees alone.3National Highway Traffic Safety Administration. Drunk Driving Auto insurance premiums increase by an average of roughly 72% after a DUI conviction and stay elevated for three to five years. Add the interlock device, alcohol classes, license reinstatement fees (commonly $125 to $200), and a possible SR-22 filing, and the total out-of-pocket cost over several years commonly lands between $10,000 and $25,000.
Refusing the Chemical Test
Every state has an implied consent law: driving on public roads is treated as prior agreement to submit to a breath, blood, or urine test when an officer has probable cause. Refusing the test doesn’t make the DUI charge disappear. It triggers a separate set of administrative penalties on top of whatever the court imposes.
The most common first-refusal penalty is an automatic license suspension of 6 to 12 months, often longer than the suspension for the DUI itself. Several states also require an ignition interlock after a refusal. In a few states, refusal is its own criminal offense. And the refusal can be introduced as evidence at trial, with prosecutors arguing that you refused because you knew you’d fail.
Situations Where a First DUI Hits Harder
Commercial Driver’s License Holders
A first DUI is career-altering for anyone holding a CDL, misdemeanor or not. Federal law sets the BAC threshold for commercial vehicle operators at 0.04%, half the standard limit.4Office of the Law Revision Counsel. 49 USC 31310 – Disqualifications A first conviction triggers a mandatory one-year CDL disqualification, or three years if hazardous materials were involved. A second DUI disqualifies the CDL for life.5eCFR. 49 CFR 383.51 – Disqualification of Drivers The disqualification applies even when the DUI happened in a personal vehicle on personal time. Employers are notified through the federal Drug and Alcohol Clearinghouse.
Drivers Under 21
Every state has a zero-tolerance law for drivers under 21, usually setting the BAC threshold at 0.02% or lower. Underage violations often bring an automatic license suspension of six months or more. In some states, testing above the zero-tolerance threshold is a civil or administrative violation rather than a criminal charge. If an underage driver’s BAC reaches 0.08%, however, they face the same criminal DUI charges as any adult, and the felony elevation rules apply regardless of age.
Non-Citizens
A single DUI misdemeanor generally won’t bar naturalization on its own, but two or more create a conditional bar to the “good moral character” requirement that USCIS evaluates on citizenship applications.6U.S. Citizenship and Immigration Services. Restoring a Rigorous Good Moral Character Evaluation Standard for Aliens Applying for Naturalization Even a first DUI can complicate visa renewals and adjustment-of-status applications when combined with other negative factors. A non-citizen facing a DUI charge should consult an immigration attorney before entering any plea.
Travel to Canada
Canada reclassified impaired driving as an offense carrying a maximum penalty of up to ten years, which means even a single misdemeanor DUI can render a U.S. citizen inadmissible. Border officers have discretion to turn you away. Rehabilitation applications and temporary resident permits exist but take time and money.7U.S. Customs and Border Protection. Entering Canada With a DUI Offense
Federal Property
A DUI on a military base, in a national park, or on other federal land goes to federal court. Under the Assimilative Crimes Act, federal courts apply the DUI laws of the surrounding state, including any stricter BAC limits and mandatory minimums.8Office of the Law Revision Counsel. 18 USC 13 – Laws of States Adopted for Areas Within Federal Jurisdiction9eCFR. 36 CFR 4.23 – Operating Under the Influence of Alcohol or Drugs State-level diversion programs or alternative sentencing aren’t available in federal court, and the conviction sits on your federal criminal record.
How a First DUI Follows You
Background Checks and Employment
A misdemeanor DUI shows up on criminal background checks. Healthcare, education, finance, and transportation employers weigh it heavily. Positions that involve driving are especially affected, because an employer’s insurance may not cover a driver with a DUI. Professional licensing boards also review criminal history at renewal.
The Lookback Period
States use a “lookback period” to decide whether a future DUI counts as a repeat offense. Most states use five to ten years, though some apply a lifetime lookback. A first DUI that feels manageable now can make a second incident years later dramatically worse.
Expungement
Roughly half the states allow expungement or record sealing for a first misdemeanor DUI, typically after a waiting period of three to ten years and completion of all sentence requirements. Some states restrict eligibility by BAC level or require a specific rehabilitation program. Some don’t allow DUI expungement at all. Where it’s available, expungement removes the conviction from public background checks.