An older DUI-related case doesn’t become irrelevant simply because it’s more than seven or ten years old. Washington now uses a longer window when deciding whether a new DUI meets the prior-offense threshold for felony classification.
The change took effect on January 1, 2026, and has created understandable confusion with Washington’s separate sentencing timeline. When reviewing a potential felony DUI case, I first determine whether each alleged prior offense meets the current statutory definition and timing requirements.
How Washington’s 15-Year Felony DUI Rule Works
A Washington DUI is a Class B felony when the person has three or more prior offenses within 15 years, as defined by RCW 46.61.5055. This period replaced the former 10-year threshold.
The analysis focuses on whether an older case legally qualifies, not whether it seems too remote to matter. An offense from 11, 12, or 14 years ago could affect the classification if it falls within the statutory period.
A Class B felony carries substantially different stakes than a misdemeanor DUI. Washington law permits up to 10 years in prison and a fine of up to $20,000, although the actual sentencing range depends on the charge, criminal history, and other facts.
Why the Sentencing Lookback Doesn’t Decide Felony Classification
The seven-year sentencing lookback and the felony classification rule serve different purposes. The shorter period governs standard repeat-DUI sentencing, while the longer one determines whether a prior record elevates the charge.
As a result, an offense outside the ordinary sentencing window can still matter in the classification analysis. The 2026 change didn’t turn every first or second DUI into a felony. The state must establish the required number of prior offenses under the applicable statute.
Which Prior Offenses Can Count
Only certain records count toward felony classification, which is why the label on an old case matters. Washington’s statutory framework includes DUI convictions and convictions for physical control, which means being in actual physical control of a vehicle while under the influence even if the person wasn’t driving.
An old conviction also doesn’t necessarily disappear from legal consideration. Washington’s general conviction-vacation statute excludes DUI and physical control convictions from vacation.
Gather the following information for every alleged prior offense:
- The offense date and case disposition date.
- The court and jurisdiction where the case was handled.
- The exact charge and final legal classification.
- Any available judgment, docket entry, or sentencing document.
A criminal history report is only a starting point. Dates, offense classifications, and out-of-state records require individual review before determining whether a case legally counts.
Prior Felony Convictions Can Independently Affect the Charge
The lookback calculation isn’t the only path to a felony DUI charge. A DUI is a felony when a person has previously been convicted of vehicular homicide or vehicular assault while under the influence.
Vehicular homicide involves a death connected to operating a vehicle under circumstances defined by Washington law. Vehicular assault is a separate felony involving substantial bodily harm under circumstances that include impaired driving.
Comparable out-of-state convictions for these offenses can also trigger felony treatment. Someone with a record from another state shouldn’t rely on the title of an old offense alone when evaluating a current Washington charge.
How a Felony DUI Case Proceeds in Seattle
Seattle-area felony DUI cases often proceed through King County Superior Court. The process can include arraignment, pretrial hearings, negotiations with the King County Prosecutor’s Office, and a jury trial if the case doesn’t resolve beforehand.
A felony DUI case can take several months or more than a year, depending on the legal issues, court schedule, evidence, and procedural posture. Early decisions can affect release conditions, driving consequences, discovery review, and challenges to the state’s claimed prior offenses.
The relevant dates and procedural posture require case-specific review. No single date, including an arrest date, conviction date, or prior-offense date, necessarily resolves every timing issue without an examination of the governing statute and court record.
Check the Records Before Assuming Felony Exposure
Before accepting the state’s allegation as settled, compare each claimed offense with the statutory definition, dates in the court records, and applicable classification window. The sentencing and felony rules are related parts of Washington DUI law, but they aren’t interchangeable.
I personally handle felony DUI representation at Hale Law Enterprises and offer free initial consultations to review prior-offense allegations and procedural issues. To discuss a Seattle-area case, call Hale Law Enterprises at (206) 207-4776.