If you’ve been charged with a DUI in Snohomish County, you’re probably searching for answers about ignition interlock devices right now. Most of what you’ll find online is already out of date. ESHB 1493, which took effect January 1, 2026, amended RCW 46.20.720 in four specific ways, and many legal blogs, county resources, and general guides haven’t caught up.
At DUIHeroes, we handle DUI cases exclusively throughout Snohomish County. Founding attorney Jonathan Dichter has more than 20 years of experience navigating Washington’s DUI statutes and has watched these laws change in ways that catch defendants off guard when they rely on outdated information. What follows is an accurate, current breakdown of what the 2026 ignition interlock device law changes actually mean for someone facing charges today.
What Changed on January 1, 2026: The Four IID Provisions of ESHB 1493
ESHB 1493 amended RCW 46.20.720 in four areas that matter directly to anyone with a pending or recent DUI charge. Understanding all four is important because they interact in ways that can create new exposure or open up options that didn’t exist before.
The New Affirmative Defense for Employer-Vehicle Use
A defendant charged with operating a vehicle without a functioning ignition interlock device can now assert the employer exemption as an affirmative defense. The catch is procedural: the notice must be given to the prosecution before the pretrial hearing. Miss that deadline and the defense is forfeited entirely. This isn’t something you can raise at trial for the first time.
The Deferred Prosecution Restriction-Counting Rule
When determining whether a driver is on their first, second, or third IID restriction, the required restriction period changes significantly: one year for a first restriction, five years for a second, and 10 years for a third. Under the 2026 change, an IID restriction arising from a deferred prosecution on the same incident doesn’t count as a prior restriction in that calculation. This matters most when a deferred prosecution is later revoked and a conviction follows.
Physical Disability Waiver
Drivers who can’t physically operate an ignition interlock device due to a qualifying disability may apply for a waiver, but only if the underlying incident occurred before June 9, 2016. The Department of Licensing (DOL) requires documentation of the disability, and the waiver doesn’t apply to incidents on or after that date.
IID Access During a Probation-Violation Suspension
Before the 2026 changes, a driver serving a mandatory 30-day suspension for a probation violation had no pathway to drive legally. ESHB 1493 now allows access to an ignition interlock driver’s license (IIL) during that suspension period, permitting limited driving privileges to and from work, school, or treatment while a full license is suspended.
The Employer Exemption: Who Qualifies & Who Doesn’t
Under RCW 46.20.720(6), a driver with an IID restriction may operate an employer-owned vehicle without a device during work hours. To qualify, the employer must sign an Employer Declaration for Ignition Interlock Exemption, the driver must send a copy of that declaration to the DOL before driving, and carry a copy while operating any unequipped work vehicle. Self-employed individuals don’t qualify unless the vehicle is used exclusively for employment purposes, and a vehicle assigned to an employee for commuting doesn’t qualify even if the employer owns it.
Operating any vehicle without a functioning IID when one is required by a court or the DOL is a gross misdemeanor under RCW 46.20.740(2). Confirming whether an exemption actually applies before driving an unequipped vehicle isn’t optional. The consequence of getting it wrong is a new criminal charge.
How the Compliance Clock Works: IID Removal Under Washington Law
Removing an ignition interlock device isn’t as simple as completing the required time period. Washington uses a compliance-based removal standard, meaning the clock can reset.
To satisfy the removal requirement, a driver must go 180 consecutive days without any of the following violations:
- An attempted start with a BAC of 0.04 or higher
- A failed rolling retest (a breath test required while the vehicle is already in motion)
- A missed retest
- A tamper event
- Removal by an uncertified technician
Any single violation resets the 180-day window to zero. Calibration must occur at least every 65 days at a state-approved service center, and days when the device isn’t installed, isn’t calibrated, or is malfunctioning don’t count toward the restriction period.
There’s also a strategic detail worth knowing early: a driver who voluntarily installs an IID beginning from the date of the incident can accrue day-for-day credit toward the post-conviction IID period. Acting before a conviction is entered can meaningfully shorten the total time the device is required.
Costs, Financial Assistance, & What Snohomish County Data Shows
Ignition interlock devices cost approximately $2,700 per year to install and maintain. Drivers also pay a $21-per-month fee to the DOL’s ignition interlock device revolving account under RCW 46.20.720, though that fee can be waived for indigent drivers under RCW 10.101.010, which measures eligibility against federal poverty guidelines. The financial assistance program reimburses approximately $80 per month to the device provider for qualifying low-income drivers, and the application is available in multiple languages.
Between April and June 2025, Washington State Patrol contacted 2,039 drivers in Snohomish County who were required to have an IID installed but hadn’t done so. That figure, cited by WSP Sergeant Brandon Villanti and reported by the Spokesman-Review in April 2026, reflects how commonly cost becomes a barrier to compliance. Non-compliance isn’t a safe alternative. It carries its own legal consequences and keeps the underlying license suspension in place. If cost is a concern, ask about the financial assistance program before assuming the device is unaffordable.
How the 2026 Changes Apply to First-Time & Felony DUI Cases in Snohomish County
Snohomish County District Court handles most DUI filings through four divisions: Everett, Cascade in Arlington, South in Lynnwood, and Evergreen in Monroe. Judges in these courts may order IID installation as a pretrial condition of release before a conviction is ever entered. For second offenses, both IID and additional alcohol monitoring are routinely ordered from the point of arraignment.
For first-time defendants considering the deferred prosecution pathway, the new restriction-counting rule has a specific application. If the deferred prosecution is completed successfully, it often resolves the case without a conviction. But if it’s later revoked and a conviction follows, whether the deferred-prosecution IID restriction counts as a prior restriction directly affects how long the new restriction period will be. Under the 2026 change, a same-incident deferred prosecution restriction doesn’t count, which protects defendants in that narrow but consequential situation.
Felony DUI defendants who may be eligible for the DOSA-DUI sentencing alternative under RCW 9.94A.661, also effective January 1, 2026, should understand that IID requirements still apply and run alongside community custody and partial confinement conditions. The sentencing alternative doesn’t bypass the device requirement.
What the 2026 Changes Mean for Your Case
The 2026 amendments carry both new risks and new opportunities. The affirmative defense notice deadline and the gross misdemeanor exposure for operating without a device are real traps for defendants who don’t know the procedural rules. The deferred prosecution counting clarification, the disability waiver, and the new IIL access during probation-violation suspensions are options that simply didn’t exist before January 1, 2026.
None of these provisions apply the same way to every case. Whether they help or hurt depends on the specific facts, which division of Snohomish County District Court is handling the matter, and when in the case timeline key decisions are made. We offer free initial consultations and we’re available around the clock at (425) 296-9358 to discuss how these changes apply to your case.