Yes. A conviction for a first-time DUI in Washington can result in mandatory jail time. For a person with no prior qualifying DUI offenses, the current Washington sentencing grid provides for a minimum of 24 consecutive hours in jail when the BAC is below 0.15 or there is no test result for reasons other than a refusal. If the BAC is 0.15 or higher, or the driver refused the test, the minimum increases to 48 consecutive hours.
That does not mean every first-time DUI case ends with the driver serving those hours in a jail cell. Washington law provides alternatives to the mandatory minimum in some circumstances, including electronic home monitoring (EHM) and 24/7 sobriety monitoring. Whether one of those alternatives is available depends on the facts of the case and the applicable sentencing rules.
There is also an important difference between an arrest and a conviction. Being arrested for DUI does not mean you will be convicted. The prosecution still has to prove the charge, and the evidence can be challenged.
For someone facing a first DUI in Seattle, the potential jail sentence is only one issue. A case can also involve license suspension or revocation, an ignition interlock device, fines, monitoring, treatment requirements, and separate administrative proceedings with the Washington Department of Licensing.
What Is the Mandatory Jail Sentence for a First DUI?
For crimes committed on or after January 1, 2026, the Washington State Courts’ DUI sentencing grid lists different penalties based primarily on BAC or test refusal.
For a first offense with no prior qualifying offense, the grid provides:
- BAC below 0.15 or no test result: 24 consecutive hours to 364 days of jail.
- BAC of 0.15 or higher: 48 consecutive hours to 364 days of jail.
- Test refusal: treated in the higher BAC category, with a 48-hour mandatory minimum.
- Passenger under 16: an additional 24 consecutive hours for each passenger under 16.
The 24- or 48-hour minimum is a sentencing requirement after a conviction. It is not a statement that someone arrested for DUI will automatically be jailed before their case is resolved.
The current court grid also shows a maximum jail term of 364 days for these misdemeanor sentencing ranges. The maximum is not the same as the sentence a first-time offender will actually receive. The applicable minimum, available alternatives, and facts of the case all matter.
Washington also has specific rules for determining whether an offense counts as a prior offense. The current sentencing grid counts qualifying prior offenses when the prior arrest occurred within seven years before or after the arrest date of the current offense. Certain DUI, physical control, out-of-state equivalent offenses, deferred prosecutions, and amended convictions can count.
So, someone who has never personally thought of themselves as having a “prior DUI” should still have their complete record reviewed before assuming that the first-offense sentencing category applies.
For a more detailed explanation of the first-offense penalties, see DUI First Offense: Potential Penalties & How To Defend Your Case.
What Factors Can Increase First-Time DUI Penalties?
A first DUI does not have one fixed penalty. Several facts can change the sentencing range.
BAC of 0.15 or higher
The 0.15 BAC threshold is significant under Washington’s sentencing grid.
With no prior qualifying offense, a BAC below 0.15 carries a 24-hour mandatory minimum. A BAC of 0.15 or higher raises the mandatory minimum to 48 consecutive hours. The minimum fine also increases from $990.50 to $1,245.50.
The higher BAC category also carries different driver’s license consequences. The current grid lists a one-year revocation for a first offense with a BAC of at least 0.15, compared with a 90-day suspension in the lower BAC category.
Refusing a test
Refusing a breath or other chemical test can also affect the consequences of a DUI case.
For sentencing purposes, the current Washington court grid places a first offense involving a test refusal in the same category as a BAC of 0.15 or higher. That means the criminal sentencing range includes a 48-hour mandatory minimum.
A refusal can also create separate Department of Licensing consequences. The administrative license case is separate from the criminal prosecution.
A passenger under 16
Having a passenger under 16 in the vehicle can increase the sentence. For a first offense, the current sentencing grid adds 24 consecutive hours of mandatory jail for each passenger under 16. It also provides for additional ignition-interlock requirements and increased fine ranges in cases involving a passenger under 16.
This means the facts surrounding the stop and arrest can matter when determining potential penalties.
Prior offenses
Calling a DUI a “first offense” does not necessarily mean that the person has never had any DUI-related case in the past.
Washington’s current sentencing grid defines prior offenses broadly. Certain DUI and physical-control convictions, equivalent offenses from other jurisdictions, some amended convictions, and certain deferred prosecutions can affect sentencing.
A review of the driver’s actual record is therefore more reliable than simply looking at whether this is the first time the person has been arrested.
Can You Avoid Jail or Replace It With Electronic Home Monitoring?
In some first-offense cases, Washington law allows alternatives to the mandatory jail term.
For a person with no prior qualifying offense and a BAC below 0.15, the current sentencing grid provides 15 days of electronic home monitoring in lieu of the mandatory minimum jail sentence. For a BAC of 0.15 or higher or a qualifying test refusal, the grid provides 30 days of EHM in lieu of the mandatory minimum jail sentence.
The court can also use a 24/7 sobriety monitoring program when available. For a first offense, the current grid identifies 90 days of 24/7 monitoring for the lower BAC category and 120 days for the BAC-at-or-above-0.15 or refusal category.
These alternatives are not the same thing as having the DUI dismissed. They are sentencing alternatives that can apply after a conviction.
Electronic monitoring also comes with conditions and costs. Depending on the sentence, monitoring may include alcohol detection or other restrictions. The court’s order determines the specific requirements.
The current Washington court materials explain that when there are no prior qualifying offenses, mandatory imprisonment generally cannot simply be suspended unless the court finds that imposing the minimum would create a substantial risk to the offender’s physical or mental well-being. The statutory alternatives can still be available.
That is why a person facing a first DUI should not assume either extreme: jail is not necessarily unavoidable, but avoiding jail is not automatic either.
See Potential Outcomes in Washington DUI Cases for more information about possible resolutions.
What Other Penalties Come With a First-Time DUI?
Jail is only one part of the potential consequences.
For a first offense with a BAC below 0.15, the current court grid lists a minimum fine of $990.50. For a BAC of 0.15 or higher or a test refusal, the minimum fine is $1,245.50. The maximum listed fine is $5,000, subject to the rules concerning mandatory minimum fines and indigency.
Driver’s license consequences can be significant as well. The court grid lists a 90-day suspension for a first offense in the below-0.15 category. A first offense with a BAC of at least 0.15 carries a one-year revocation, while a refusal can result in a two-year revocation under the applicable DOL rules.
Ignition interlock requirements can also apply. The current sentencing grid states that the Department of Licensing imposes an ignition interlock requirement in DUI cases, subject to the statutory requirements and exceptions described in the grid.
Alcohol or drug education, a victim impact program, substance-use assessment or treatment, and other conditions can also be ordered depending on the circumstances.
For someone who depends on a vehicle for work, school, childcare, or other responsibilities, the license consequences can be a major practical concern even when the jail sentence is relatively short.
What Happens After a First DUI Arrest in Seattle?
A first DUI arrest can create two separate legal processes: a criminal DUI case and an administrative driver’s license case.
The Department of Licensing process can begin immediately after the arrest. According to the Washington DOL, a driver generally has seven days from the date of arrest to request a hearing to contest the administrative license suspension. If the hearing is not requested or the driver does not prevail, the DOL can suspend the license.
The DOL process is separate from the criminal prosecution. Winning the administrative hearing does not necessarily prevent a later license suspension resulting from a DUI conviction, and losing the administrative hearing does not itself establish criminal guilt.
The criminal case is handled through the court with jurisdiction over the alleged offense. For a Seattle arrest, that can involve Seattle Municipal Court depending on where and how the offense occurred.
The evidence should be reviewed before deciding how to resolve the case. Depending on the circumstances, that review can include:
- The reason police stopped the vehicle.
- The officer’s observations before and during the stop.
- Field sobriety testing.
- The administration and results of breath testing.
- Blood-test procedures and records.
- Statements made during the investigation.
- Whether officers followed applicable procedures.
- Whether the evidence establishes the required elements of the DUI charge.
The goal is not to assume that every DUI case has a defense. It is to determine what the evidence actually shows.
The Washington DUI Self Help Guide provides additional information about what to do after an arrest.
How Can a Seattle DUI Attorney Help Fight the Charges?
A Seattle DUI attorney can review the evidence, explain the potential sentencing range, address the DOL process, and represent the defendant in court.
The first step is usually understanding exactly what happened. A lawyer may examine the traffic stop, officer reports, field sobriety tests, breath or blood testing, and other evidence. If there is a legal or factual problem with the prosecution’s evidence, the defense may be able to challenge it.
A lawyer can also explain the difference between seeking dismissal, negotiating a resolution, accepting a conviction, or taking the case to trial. The appropriate option depends on the evidence and circumstances of the individual case.
Milios Defense states that Tim Milios has defended people charged with DUI and other drunk-driving offenses in Washington since 1993. The firm’s website states that he has personally resolved well over 1,000 Washington DUI cases during his criminal-defense practice.
The firm’s homepage also includes a client review describing a DUI case that the client says was dismissed on the scheduled court date. That is a client’s account of an individual result, not a promise that another case will have the same outcome.
For someone searching for DUI lawyers in Seattle, DUI attorneys in Seattle, or a DUI attorney near you, the important question is how the lawyer will evaluate the specific evidence and consequences in the case.
A first DUI should be taken seriously, but an arrest is not a conviction. Before deciding how to respond, it is worth understanding the applicable jail range, the DOL deadline, the evidence against you, and the alternatives that may be available.
FAQ
Can a first-time DUI be dismissed in Washington?
Yes. A first-time DUI can potentially be dismissed, but there is no automatic dismissal simply because it is a first offense.
Whether dismissal is possible depends on the facts and evidence. A defense attorney may identify problems involving the traffic stop, probable cause, field sobriety testing, breath or blood testing, or other aspects of the prosecution’s case.
A dismissal is also different from an alternative sentence after conviction. If the charge is dismissed, there is no DUI conviction resulting from that charge.
How long do you have to request a hearing after a DUI arrest in Washington?
The Washington Department of Licensing states that you generally have seven days from the date of arrest to request a hearing to contest the administrative license suspension.
This is a separate process from the criminal DUI case. Because the deadline is short, someone arrested for DUI should address the DOL notice promptly.
For more information, see Hearing Procedure: Washington DUIs / Contesting License Suspension.
What happens if your BAC is 0.15 or higher on a first DUI?
A BAC of 0.15 or higher places a first offense in the enhanced sentencing category. Under the January 2026 Washington DUI sentencing grid, the mandatory minimum is 48 consecutive hours in jail, compared with 24 hours for a first offense with a BAC below 0.15.
The grid also provides for 30 days of electronic home monitoring in lieu of the mandatory minimum jail term and a 120-day 24/7 sobriety monitoring alternative when applicable.
The minimum fine is $1,245.50, and the driver’s license consequences are also more severe than those associated with a first offense below 0.15.
Does a first DUI stay on your record in Washington?
A DUI conviction is a criminal conviction and can have continuing consequences. The specific treatment of the record later can depend on how the case was resolved and whether a particular legal remedy is available.
Washington also treats certain prior DUI-related dispositions as “prior offenses” when determining penalties for a later DUI. The current sentencing grid includes rules covering certain deferred prosecutions, amended convictions, and other dispositions.
For that reason, someone concerned about the long-term effect of a DUI should distinguish between an arrest, a charge, a dismissal, a conviction, and other possible case outcomes.