Third-degree DWI is a gross misdemeanor in Minnesota. It covers two different situations that are often blurred together: a DWI committed with one statutory aggravating factor, and criminal refusal to submit to chemical testing even when no aggravating factor is present. The distinction matters because the state’s proof, pretrial-release rules, driver’s-license consequences, and possible defenses can be very different.

A first-time driver can face third-degree DWI because of a test refusal, an alcohol concentration of 0.16 or more, or a qualifying child passenger. A driver can also face third-degree DWI because of one qualified prior impaired-driving incident within 10 years. The charge carries up to 364 days in jail and a $3,000 fine, but the actual sentencing framework depends on whether it is a first, second, or later incident.

This guide explains Minn. Stat. § 169A.26 (2026), the aggravating factors, refusal law, mandatory sentencing, license revocation, plate impoundment, evidence, and defenses. It uses current 2026 law. The law in effect on the incident date generally controls, and this is general information rather than advice about a particular case.

What to do after a third-degree DWI arrest

The criminal case is only one part of the problem. A revocation notice may start a civil deadline before the first criminal hearing. A plate order, monitoring condition, or vehicle notice may have a separate deadline. Treat every paper as operative until counsel confirms otherwise.

Save the notice and its envelope. A petition for judicial review of a DWI license revocation ordinarily must be filed within 60 days after receipt. Waiting for the prosecutor, police reports, or first court date can forfeit the challenge.
Follow the release order. Abstinence, testing, remote electronic alcohol monitoring, no-driving provisions, and travel restrictions can be enforced while the charge is pending.
Preserve recordings and electronic evidence. Identify squad and body-camera video, dispatch calls, business cameras, phone data, receipts, vehicle data, and witnesses. Some sources are overwritten quickly.
Do not assume a prior is valid. Obtain the conviction judgment or revocation order, confirm the incident date, and determine whether a conviction and license action came from the same conduct.
Keep the full test record. A breath-test printout, warrant, hospital paperwork, blood-draw documents, and laboratory result should be preserved with times visible.

A client should not explain the incident on social media or in a recorded jail call. If a child passenger is involved, avoid repeated questioning that can alter the child’s memory or create an allegation of coaching.

What is third-degree DWI in Minnesota?

Section 169A.26 provides two definitions:

A violation of the ordinary DWI provisions in section 169A.20, subdivision 1, is third degree when one aggravating factor was present.
A violation of the criminal test-refusal provision in section 169A.20, subdivision 2, is third degree without any additional aggravating factor.

That structure produces several common cases:

a second DWI within 10 years based on one qualifying prior incident;
a first DWI with an alcohol concentration of 0.16 or more;
a first DWI with a qualifying child passenger;
a first-time refusal of an evidentiary breath test; and
a first-time refusal of a warranted blood or urine test under the statutory conditions.

If the state proves two aggravating factors—or refusal plus one factor—the charge can be second degree. If it proves no factor and no refusal, the ordinary motor-vehicle DWI is generally fourth degree. First-degree DWI has a separate felony enhancement structure.

The three aggravating factors

Minn. Stat. § 169A.03, subdivision 3 (2026) defines the factors:

a qualified prior impaired-driving incident within the 10 years immediately preceding the current offense;
an alcohol concentration of 0.16 or more measured at the time of the offense or within two hours; or
a child under 16 in the motor vehicle if the child is more than 36 months younger than the accused.

Each factor has proof requirements. A database entry does not establish a valid prior. An officer’s statement that a test was “high” does not establish a reliable and timely 0.16 result. Describing a passenger as a minor does not establish the statutory ages or that the child was present at the relevant time.

When only one factor is alleged, a successful challenge to it can reduce an impairment or alcohol-concentration charge from third degree to fourth degree even if the underlying DWI remains. That is why degree-setting evidence should be investigated independently of the stop and test.

Third-degree DWI based on one qualified prior incident

A qualified incident may be a qualifying impaired-driving conviction or a qualifying impaired-driving-related loss of license. A prior revocation can therefore count even when the criminal charge from that event was dismissed or reduced. But a mere arrest does not become an aggravating factor simply because it appears on a law-enforcement record.

Minn. Stat. § 169A.09 (2026) prevents double counting. A conviction and license loss from the same course of conduct count as one incident, not two. If records list different dates for arrest, revocation, conviction, and reinstatement, counsel should connect them to the underlying event before deciding how many priors exist.

Out-of-state DUI or OWI matters require a conformity analysis. The foreign statute, subdivision, and legal disposition must fit Minnesota’s definition. An informal diversion, administrative suspension, or broadly worded foreign offense may not have the same effect as a Minnesota DWI conviction.

The 10-year boundary is strict. In State v. Wertheimer, 781 N.W.2d 158, 162–63 (Minn. 2010), the Supreme Court held that relevant dates “must be in the same ten-year period.” Offenses on the same calendar date exactly 10 years apart were outside the statutory window.

At trial, a prior is part of the offense, not just sentencing history. A stipulation may keep prejudicial details from the jury, but it waives trial on an element. In State v. Kuhlmann, 806 N.W.2d 844, 848–50 (Minn. 2011), the Supreme Court held that the district court erred by accepting counsel’s stipulation to prior-conviction elements without obtaining the defendant’s personal jury-trial waiver.

Third-degree DWI based on a 0.16-or-higher result

A result of 0.16 or more is one aggravating factor. A first incident can therefore be a gross misdemeanor even with no prior record and no child passenger. The threshold includes exactly 0.160, provided the state proves a timely, admissible, and reliable measurement.

The defense should obtain more than the final number. Breath testing should be evaluated for observation-period events, mouth alcohol, sample agreement, instrument messages, controls, maintenance, operator procedure, and timing. Blood and urine testing require review of the warrant, collection kit, preservatives, labeling, storage, transport, chain of custody, analytical method, quality controls, calibration, and measurement uncertainty.

A result near the threshold deserves special attention. The legal question is not whether the number looked high to an officer; it is whether the admissible evidence proves 0.16 or more beyond a reasonable doubt. A laboratory’s reporting convention and uncertainty estimate may matter. The relevant time is the offense or the two-hour statutory period, not an untethered later estimate.

Minn. Stat. § 169A.46, subdivision 1 (2026) recognizes an affirmative defense when alcohol consumed after driving and before the evidentiary test caused the concentration to cross the statutory level. The defendant must give notice before the omnibus or pretrial hearing and prove the defense by a preponderance of the evidence. This is about actual post-driving consumption, not merely an argument that the body was still absorbing alcohol.

Third-degree DWI based on a child passenger

The passenger must have been under 16, more than 36 months younger than the accused, and in the motor vehicle at the time of the offense. The prosecution should prove the ages and timing rather than rely on a police description such as “juvenile passenger.”

One child supplies one aggravating factor, and multiple children still supply only one. In State v. Fichtner, 867 N.W.2d 242, 248–50 (Minn. Ct. App. 2015), the Court of Appeals rejected stacking three children as three factors. The court held that “the presence of either a child or multiple children may constitute only one aggravating factor” and reduced the ordinary DWI count to third degree.

The state may also investigate child endangerment, and law enforcement may make a child-protection report. Those are separate legal issues. The child-passenger factor does not automatically prove every element of another offense. Counsel should coordinate the criminal case with any child-protection or family-court matter because statements and records can move between proceedings.

Third-degree DWI based on test refusal

Criminal refusal is third degree even without a prior, high alcohol concentration, or child passenger. If one aggravating factor is present, refusal becomes second degree. The refusal count and any separate impairment count may arise from the same incident, but each has its own elements.

For an evidentiary breath-test refusal, the prosecution generally must prove a lawful DWI arrest based on probable cause, a lawful request, the required breath-test advisory, and a refusal. The driver has a limited right to consult an attorney that cannot unreasonably delay testing. Whether a reasonable opportunity was provided depends on time, access to a telephone and directories, the driver’s efforts, and surrounding circumstances.

In State v. Bernard, 859 N.W.2d 762, 767–74 (Minn. 2015), the Supreme Court held that the breath-test request in that case was a valid search incident to arrest. The decision does not make every refusal valid. The stop, expansion, probable cause, arrest, advisory, attorney access, test availability, and alleged refusal remain open to factual and legal examination.

A refusal is not always the word “no.” A person may verbally agree but frustrate the test, provide deficient samples, remain silent, or condition agreement in a way the state characterizes as refusal. Conversely, confusion, a genuine medical inability, language or hearing barriers, an interrupted attorney consultation, or an ambiguous exchange may undermine that characterization. The complete recording is essential.

Breath refusal is different from blood or urine refusal

Minnesota generally uses the implied-consent advisory for an evidentiary breath request. Blood and urine testing ordinarily require a search warrant or a recognized exception to the warrant requirement. Under Minn. Stat. § 171.177 (2026), an officer executing a warrant must advise that refusal is a crime. When the warrant authorizes either blood or urine and the driver objects to the selected type, the statutory alternative rules apply.

The constitutional distinction comes from the physical intrusion. Bernard addressed breath. In State v. Trahan, 886 N.W.2d 216, 220–24 (Minn. 2016), the Supreme Court held that imposing a criminal penalty for refusing the warrantless blood test at issue violated the Fourth Amendment. Current law reflects the warrant requirement for blood and urine requests, subject to recognized exceptions.

A warrant does not make procedure irrelevant. Counsel should examine probable cause in the application, material omissions or misstatements, the issuing judge’s authorization, test type, advisory, execution, medical collection, chain of custody, and whether the officer offered an authorized alternative when the statute required one.

The limited right to counsel also differs. In State v. Rosenbush, 931 N.W.2d 91, 93–98 (Minn. 2019), the Supreme Court held that the limited counsel right associated with the implied-consent process did not apply to a warranted blood test. A lawyer should identify the requested test and governing procedure before deciding whether an attorney-access challenge is available.

The state must prove the current DWI theory

When the case is based on an aggravating factor rather than refusal, the state must prove a present violation of Minn. Stat. § 169A.20, subdivision 1 (2026). The statute covers driving, operating, or physical control:

under the influence of alcohol;
under the influence of a controlled substance, intoxicating substance, cannabis, or a combination;
with an alcohol concentration of 0.08 or more at the time or within two hours;
with an alcohol concentration of 0.04 or more while operating a commercial vehicle; or
with specified Schedule I or II substances or metabolites present, subject to statutory exclusions and defenses.

An aggravating factor does not substitute for proof of driving or physical control. A parked-vehicle case may depend on keys, operability, location, the person’s position, ownership, and the practical ability to put the vehicle in motion. A drug case may require toxicology interpretation rather than an assumption that detection proves impairment.

For the broader DWI framework, including ordinary impairment, physical control, roadside investigation, and testing, see the firm’s Minnesota DWI defense guide.

Defense investigation and pretrial motions

Third-degree DWI cases should be reconstructed from original evidence, not from the conclusion section of a police report. The defense timeline should include reported driving, initial observation, seizure, questioning, field exercises, preliminary test, arrest, attorney access, advisory or warrant, evidentiary test or refusal, booking, notice service, and release.

The stop and expansion

An officer needs a lawful basis to stop or otherwise seize a person. A traffic violation, observed conduct, or sufficiently reliable report may provide it. The defense should examine what the officer knew at the moment of seizure, not facts learned later. Video can confirm the report, contradict it, or reveal that the claimed violation was legally or factually mistaken.

A lawful traffic stop may still be unlawfully prolonged or expanded. In State v. Diede, 795 N.W.2d 836, 843 (Minn. 2011), the Supreme Court required “a particularized and objective basis” for reasonable suspicion. Counsel should identify when the traffic mission ended, when the DWI investigation began, and which facts supported each additional intrusion.

Field exercises and probable cause

Field sobriety exercises are observations under controlled instructions, not a chemical measurement. Performance can be affected by the surface, lighting, traffic, weather, footwear, age, injury, disability, fatigue, anxiety, language, and the accuracy of the demonstration. The full recording should be compared with the officer’s selected clues.

Probable cause is assessed from the total circumstances. Odor can show exposure to alcohol but does not quantify concentration. Red eyes, speech, balance, confusion, and driving may be relevant, but each may have alternative explanations. A serious review neither dismisses every observation nor treats the report’s conclusion as self-proving.

Testing evidence

For breath evidence, obtain the test record, instrument messages, sample values, control results, maintenance and certification information, operator records, and video of the observation and test. For blood or urine, obtain the warrant, return, collection records, kit information, chain of custody, laboratory file, methods, controls, calibration, and uncertainty data.

A controlled-substance or cannabis result requires attention to the charged theory. Presence is not always impairment. The substance, metabolite, concentration, active effects, timing, prescription status, observations, and statutory exclusions should be evaluated together.

The civil license case

The license petition can address probable cause, arrest, advisory, refusal, test result, test reliability, warrant issues, and specified statutory defenses. The permitted issues depend on the test procedure. Testimony or discovery from the civil case may affect the criminal case, so the two should be coordinated. Winning one does not automatically decide the other.

Does third-degree DWI require custodial arrest?

Not every third-degree charge triggers the same arrest rule. Under Minn. Stat. § 169A.40, subdivision 3 (2026), custodial arrest is required for third-degree DWI when the person is under 19. It is also required when the offense involves a 0.16-or-higher alcohol concentration, a qualifying child passenger, or driving while privileges are canceled as inimical to public safety.

An adult third-degree case based solely on first-time breath refusal or one prior incident is not listed as mandatory custodial arrest merely because the offense is third degree. Officers may have other arrest authority, but the precise statutory basis should not be overstated.

When a person is charged with a nonfelony DWI under the circumstances listed in the custodial-arrest statute, Minn. Stat. § 169A.44 (2026) governs conditional release. Unless maximum bail is imposed, release generally requires abstinence and remote electronic alcohol monitoring with at least daily breath measurements. An extreme-hardship provision permits another appropriate condition in a qualifying case.

The court’s actual release order controls. Missed tests, alcohol use, driving, or failure to report can lead to revocation of release. A person who cannot comply because of equipment, work, medication, housing, or transportation should raise the issue through counsel and the court rather than silently stop complying.

Third-degree DWI penalties

Third-degree DWI is a gross misdemeanor. Minn. Stat. § 609.03, subdivision 2 (2026) authorizes up to 364 days in jail, a fine of up to $3,000, or both. The statutory maximum is not a prediction. The repeat-offense minimums in Minn. Stat. § 169A.275 (2026) depend on qualified incident count.

First incident

A first incident may be third degree because of refusal, a 0.16-or-higher result, or a child passenger. The repeat-offense jail minimum in section 169A.275, subdivision 1, does not apply without a qualified prior. The court may still impose jail, probation, a fine, assessment, treatment, monitoring, a victim-impact panel, community work service, and other lawful conditions.

Second incident within 10 years

A conviction within 10 years of a qualified prior generally carries a minimum 30-day framework. At least 48 hours must be served in a local correctional facility under the incarceration option, or the court may order eight hours of community work service for each day below 30 served locally. Statutory departures may be available for substantial mitigating factors or an authorized intensive-probation program, but the statute retains an unsuspendable floor of at least 48 hours’ incarceration or 80 hours of community work service.

Assessment and treatment

Section 169A.275, subdivision 5, requires the court to order the level of care recommended in the substance-use-disorder assessment when the conviction involved 0.16 or more or occurred within 10 years of a qualified prior, unless the person is committed under the felony provision. Treatment selection and timing should reflect clinical need and the litigation posture.

Long-term electronic alcohol monitoring under Minn. Stat. § 169A.277 (2026) generally applies to specified third-or-later conviction situations, certain young repeat offenders, and offenses committed while privileges are canceled as inimical to public safety. A third-degree label by itself does not automatically establish that long-term monitoring provision.

License revocation and ignition interlock

The commissioner’s action depends on test failure or refusal and prior history, not simply the criminal degree. Under current Minn. Stat. § 171.178 (2026):

a test refusal with no qualified prior incident in the past 20 years generally carries at least a one-year revocation;
a test failure with no prior generally carries at least 90 days;
a first test failure at twice the legal limit or more generally carries at least one year; and
with one prior in 20 years, or two or more priors, revocation may continue until the required ignition-interlock period is completed.

The 20-year licensing lookback is different from the 10-year criminal aggravating-factor window. A person may therefore have a first criminal offense for degree purposes but face repeat licensing treatment, or vice versa depending on the record and statutory dates.

A petition for judicial review ordinarily must be filed within 60 days after receipt of the notice and order. Administrative review does not extend that deadline. A plea negotiation does not automatically undo the revocation. The firm’s DWI license revocation and implied-consent guide explains the civil process in detail.

Plate impoundment and vehicle consequences

Plate impoundment is common in third-degree cases involving a prior, a 0.16-or-higher alcohol concentration, or a qualifying child passenger. Minn. Stat. § 169A.60 (2026) separately defines the plate-impoundment violations. A first-time refusal without a prior, qualifying high concentration, or child passenger does not trigger plate impoundment merely because refusal is third degree.

The plate order may affect the vehicle involved and other vehicles registered, jointly registered, or leased in the violator’s name, subject to statutory owner protections and special-series plate procedures. A person seeking judicial review ordinarily has 60 days from receipt of the order. The plate petition may be combined with a license petition, but each notice should be preserved and pleaded correctly.

Vehicle forfeiture is narrower. Under Minn. Stat. § 169A.63 (2026), a designated offense includes first-degree DWI and a DWI within 10 years of the first of two qualified prior incidents. An ordinary first- or second-incident third-degree charge is not automatically a forfeiture offense. If a vehicle is seized, however, the separate notice and demand procedure requires immediate attention from the driver and any titled owner.

Consequences beyond jail and the license

A gross-misdemeanor DWI can affect employment, professional licensing, commercial driving, insurance, housing, travel, and immigration. A CDL holder can face disqualification even when the incident involved a personal vehicle. Licensed professionals may have reporting duties that arise before the criminal case ends.

Noncitizens should receive advice from qualified immigration counsel before entering a plea. The analysis depends on the complete record, accompanying charges, admissions, sentence, and status. No responsible criminal lawyer should make a categorical immigration promise from the phrase “gross-misdemeanor DWI.”

A child-passenger case may lead to contact from child-protection authorities or affect a family-court dispute. The client should comply with lawful safety requirements and ensure that defense counsel knows about every interview, notice, and order.

Negotiation, trial, and sentencing strategy

A third-degree case can change in several ways. If the state cannot prove the aggravating factor, an ordinary DWI count may be reduced to fourth degree. If the refusal proof fails, the refusal count may be dismissed even though an impairment count remains. Suppression of the stop, arrest, or test can affect all counts. A defective prior may also change mandatory sentencing and plate consequences.

Negotiations should identify the specific weakness instead of asking for an unexplained favor. Terms may address the offense degree, dismissal of alternative counts, mandatory-minimum structure, jail or community-work-service execution, monitoring credit, assessment and treatment, plate or forfeiture matters, and probation conditions. The prosecutor does not control every administrative license consequence.

Trial preparation includes deciding whether to stipulate to a prior, how to present test uncertainty near 0.16, whether expert assistance is needed, and how to address a child-passenger allegation without inviting decision by emotion. A stipulation to a prior requires a personal, informed jury-trial waiver and should not concede a disputed legal issue accidentally.

A sentencing presentation should be prepared before a plea is entered. Verified treatment, monitoring compliance, stable housing, work and caregiving responsibilities, medical information, transportation planning, and a lawful proposal for any mandatory term can be more persuasive than generalized assurances.

Frequently asked questions about Minnesota third-degree DWI

1. Is third-degree DWI a felony?

No. It is a gross misdemeanor punishable by up to 364 days in jail and a $3,000 fine. First-degree DWI is the felony level.

2. Can a first DWI be third degree?

Yes. A first incident is third degree if it involves criminal test refusal or one aggravating factor, such as a 0.16-or-higher result or a qualifying child passenger.

3. What are the aggravating factors?

They are a qualified prior incident within 10 years, an alcohol concentration of 0.16 or more at the time or within two hours, and a child under 16 in the vehicle who is more than 36 months younger than the accused.

4. Does an old revocation count even if the DWI charge was dismissed?

It may. A qualifying impaired-driving-related loss of license can be an aggravating factor on its own. A rescinded revocation, nonqualifying action, or mere arrest should not be counted without examining the record.

5. Does a conviction and revocation from one arrest count twice?

No. Minnesota law treats a qualifying conviction and qualifying license loss from the same course of conduct as one incident.

6. Is a result of exactly 0.16 an aggravating factor?

Yes, if the state proves the result is timely, admissible, and reliable. The statute says 0.16 “or more.” Results near the threshold should be reviewed for procedure, precision, and uncertainty.

7. Do several children create several factors?

No. State v. Fichtner holds that one or multiple qualifying children create one aggravating factor.

8. Is every passenger under 18 a qualifying child passenger?

No. The child must be under 16 and more than 36 months younger than the accused, and must have been in the motor vehicle at the time of the offense.

9. Can police charge refusal if the driver tried but could not provide breath?

They can allege refusal, but inability and refusal are not always the same. Medical evidence, instrument messages, effort, instructions, sample data, and the complete recording should be reviewed.

10. Is a warrant required for a breath test?

Not ordinarily after a lawful DWI arrest. State v. Bernard upheld the breath request at issue as a search incident to arrest. Blood and urine testing ordinarily require a warrant or a recognized exception.

11. Is jail mandatory for third-degree DWI?

Not merely because of the degree. A second incident within 10 years triggers the repeat-offense framework, including an unsuspendable floor. A first incident based on refusal, high concentration, or a child does not carry that repeat minimum solely from its third-degree classification.

12. Must every person charged with third-degree DWI be taken into custody?

No single rule covers every third-degree theory. Custodial arrest is required in the circumstances listed in section 169A.40, including a third-degree charge for a person under 19, a 0.16-or-higher result, a qualifying child passenger, or canceled-inimical status.

13. Will the license plates be impounded?

Plate impoundment commonly follows a repeat incident, a test at twice the legal limit, or a qualifying child passenger. A first-time refusal without one of those facts does not trigger plate impoundment solely from the third-degree title.

14. How long is the deadline to challenge the license revocation?

A petition for judicial review ordinarily must be filed within 60 days after receiving the notice and order. The criminal court date and an administrative-review request do not extend that deadline.

15. Can third-degree DWI be reduced to fourth degree?

Yes, when the ordinary DWI remains but the state cannot prove the single aggravating factor. A refusal case is different because refusal itself is third degree even without another factor. Reduction depends on the evidence and applicable law.

The charge should be separated into its actual proof

A third-degree case is not one undifferentiated accusation. It may involve a current DWI plus one factor, or refusal without a factor. The defense should identify the exact theory, verify the prior or other enhancement, audit the test or refusal process, preserve the civil deadlines, and calculate sentencing from the true incident count.

If you are charged with third-degree DWI in Minnesota, bring the complaint, revocation and plate notices, release conditions, test paperwork, prior-incident information, and any video or witness information to the consultation. Early review protects issues that cannot be recreated after a deadline or recording is lost.