A first impaired driving case in Washington usually ends in one of four ways, and the difference between them is measured in both years and dollars. The four are a deferred prosecution, a negotiated reduction to a lesser charge, a plea or verdict on the original charge, and an acquittal after trial. Each carries a different mix of attorney fees, court financial obligations, treatment costs, insurance consequences, and monitoring equipment rental. A careful reader compares them the way an accountant would, by writing down every recurring obligation and the number of months it runs.
1. Deferred prosecution, and the five-year tail
Deferred prosecution is available once in a lifetime, and it is not a dismissal in the ordinary sense. The defendant petitions the court, stipulates that the police reports may be used as the facts of the case, waives a jury trial, and agrees to a treatment plan based on a formal evaluation finding a substance use disorder or a qualifying mental health condition. The intensive phase of treatment typically runs two years, and the case stays open for five before it is dismissed. The costs are treatment fees, monitoring, court review hearings, and ignition interlock rental for the required period.
What a careful reader checks first is whether the fee quoted covers those five years of compliance hearings, or only the petition and the first year. A revocation, triggered by a missed session or a new offense, sends the original charge back for immediate sentencing on the stipulated facts, which is why the durability of the treatment plan matters more than its price.
2. Reduction to negligent driving in the first degree
The common negotiated ending is an amendment to negligent driving in the first degree, sometimes to reckless driving instead. Neither carries the mandatory jail or electronic home monitoring that attaches to an impaired driving conviction, and neither triggers the same license action from the sentencing court. Both still appear on a driving record, both still count as a prior offense if there is a second arrest inside the statutory lookback period, and both usually come with a treatment evaluation, a probation term, and court costs. Insurance carriers price them differently from a full conviction, though not as though nothing happened.
The check here is on the conditions attached to the amended charge. A reduction with two years of probation, a full evaluation, an interlock requirement, and a suspended jail sentence hanging over the term is a meaningfully different obligation from one with none of those things, even though the charge name reads the same on paper.
3. Conviction on the original charge
A conviction on a first offense carries mandatory minimums set by statute rather than by the judge's discretion. The sentence includes a short jail term or a longer stretch of electronic home monitoring, a minimum fine plus mandatory assessments that push the court obligation into four figures, a license suspension, a five-year probation term, and an ignition interlock device installed at the driver's expense for a defined period. The National Highway Traffic Safety Administration tracks impaired driving countermeasures nationally, and interlock requirements of this kind are among the most widely adopted.
The recurring costs are the ones that add up. Monitoring equipment is billed monthly, interlock devices carry an installation charge plus a monthly lease and calibration visits, and high-risk insurance certification runs for years. A reader comparing endings should total the monthly figures across the full term rather than the one-time fine.
4. Trial, and what the fee agreement says about it
Most retainer agreements price a case in stages, and trial is a separate stage with a separate fee. The pre-trial fee generally covers discovery review, motions to suppress, the license hearing, and negotiation. A trial fee covers jury selection through verdict, and it may be quoted as a flat amount, a daily rate, or an hourly draw against a supplemental deposit. Expert costs sit outside the fee entirely: an independent review of breath test maintenance records, a retest of a blood sample, or a toxicologist's testimony are billed as they are incurred.
An acquittal ends the criminal case and leaves the administrative license matter to be resolved on its own record, which is why the two are handled on separate timelines.
5. Comparing the four on one page
The comparison that helps is a single sheet with four columns, one per ending, and rows for attorney fees by stage, court financial obligations, treatment and evaluation costs, monitoring or interlock months, probation length, license status, and how long the record follows the driver. Filled in honestly, it usually shows that the cheapest ending in the first ninety days is not the cheapest across five years. That is the number worth asking about before signing anything.