Washington IIL vs Deferred Prosecution Restricted License After a DUI

Washington's Ignition Interlock License (IIL) allows unrestricted driving—any destination, any time of day—provided you operate a vehicle equipped with a DOL-approved ignition interlock device. The IIL replaces the traditional occupational license Washington eliminated for DUI suspensions under RCW 46.20.385. A deferred prosecution restricted license, issued under RCW 10.05, is granted by the court (not DOL) when you enter a DUI deferred prosecution agreement and typically limits driving to employment, education, medical care, and court-ordered treatment appointments. The IIL is available immediately upon suspension in most first-offense DUI administrative revocation cases—no waiting period for test-failure suspensions. Deferred prosecution restricted licenses are granted at judicial discretion only after you file a deferred prosecution petition, attend a pretrial hearing, and receive court approval. Many drivers assume the two programs are equivalent and file for the wrong one based on what their employer or attorney suggests without confirming which license type actually fits their case. If you refuse the breath test during arrest, Washington imposes a 1-year administrative suspension and IIL eligibility may be delayed or denied depending on prior DUI history. Deferred prosecution does not lift the administrative suspension—it only addresses the criminal charge suspension. You may need both programs running concurrently: an IIL to handle the DOL administrative suspension, and a deferred prosecution restricted license to satisfy court-ordered conditions during the criminal case deferral period.

You can apply for an IIL as soon as DOL issues the suspension notice in test-failure cases. Washington does not impose a hard suspension waiting period for first-offense DUI administrative suspensions triggered by a BAC over .08—the IIL application window opens on day one. You must obtain an ignition interlock device installation certificate from a DOL-approved provider, file proof of SR-22 insurance, complete the IIL application form, and pay the $100 application fee before DOL will issue the license. Refusal cases carry a 1-year administrative suspension under RCW 46.20.3101, and IIL eligibility is not guaranteed immediately—DOL may require a waiting period or deny IIL eligibility entirely if you have prior DUI convictions or prior IIL violations on record. Second-offense and third-offense DUI cases face longer mandatory hard suspension periods before IIL eligibility opens, and repeat offenders may be disqualified from the IIL program altogether depending on offense timing and prior compliance history. Deferred prosecution restricted licenses do not follow a fixed timeline—the court sets eligibility at the deferred prosecution acceptance hearing. Some judges issue the restricted license immediately upon accepting the petition; others impose a 30-day or 60-day wait period before restricted driving privileges begin. The deferred prosecution statute does not mandate a specific waiting period, so judicial practice varies by county and by individual judge.

The IIL has no route or time restrictions—you can drive anywhere, anytime, for any purpose, provided the vehicle is equipped with a functioning DOL-approved ignition interlock device. Grocery runs, social visits, recreational trips, and cross-state travel are all permitted under the IIL. The only restriction is the IID requirement itself: if the device detects alcohol or if you attempt to drive a non-IID-equipped vehicle, you violate the license terms and DOL will revoke the IIL immediately. Deferred prosecution restricted licenses limit driving to court-approved purposes: employment (including commute), education (college, trade school, high school completion), medical appointments, court-ordered treatment sessions, and court hearings related to the deferred prosecution case. Social, recreational, and personal errands are prohibited unless the court explicitly adds them to the restricted license order at the acceptance hearing. Some counties allow grocery shopping and childcare transportation if you petition for it and the prosecutor does not object; others deny these requests as a matter of policy. If your employer requires job-site travel across multiple counties or requires driving outside standard business hours, the IIL is typically the better option because it imposes no geographic or temporal limits. Deferred prosecution restricted licenses can be amended by filing a motion with the court, but judges are reluctant to expand approved purposes beyond the statutory baseline unless you demonstrate genuine hardship and the prosecutor agrees. Violating a deferred prosecution restricted license—driving outside approved purposes or times—triggers automatic revocation of the deferral and reinstates the original DUI criminal charge.

Both the IIL and the deferred prosecution restricted license require SR-22 insurance filing. Washington mandates SR-22 for all DUI-related driving privileges under RCW 46.29, and the filing period is 3 years measured from the date DOL receives the SR-22 certificate, not from the conviction date. If you allow the SR-22 to lapse—even for one day—DOL suspends the IIL or restricted license immediately and you must refile, pay reinstatement fees, and restart the 3-year clock. The IIL program requires an ignition interlock device in every vehicle you operate—mandatory under RCW 46.20.385. The device must be installed by a DOL-approved provider, and you must submit the installation certificate with your IIL application. Monthly IID lease costs range from $70 to $100, and you pay calibration fees every 30 to 60 days depending on the provider's monitoring schedule. If the device registers a violation (failed breath test, tamper attempt, missed calibration), the provider reports it to DOL and your IIL is revoked. Deferred prosecution restricted licenses also require ignition interlock installation in most counties, but the requirement is set by the court, not by statute. Some judges waive the IID requirement if your BAC was below .15 and you have no prior DUI history; others impose IID as a mandatory condition for all deferred prosecution cases regardless of BAC level. The deferred prosecution petition does not automatically trigger IID—it must appear in the court's acceptance order. If the order is silent on IID and you do not install one, you violate no law, but many defense attorneys recommend installing it anyway to strengthen your compliance record during the 5-year deferral period.

Yes—many Washington DUI defendants hold both simultaneously because the IIL resolves the DOL administrative suspension and the deferred prosecution restricted license satisfies the court's criminal case conditions. The administrative suspension and the criminal court suspension are separate legal tracks under Washington law. DOL imposes the administrative suspension immediately after arrest based on BAC test results or refusal; the court imposes a separate suspension upon conviction or deferred prosecution acceptance. If you enter deferred prosecution before the criminal case reaches conviction, the court-ordered restricted license replaces the criminal suspension but does not lift the DOL administrative suspension. You still need the IIL to drive legally under DOL authority. The two licenses do not conflict—the IIL's unrestricted scope simply supersedes the narrower deferred prosecution restrictions in practice, and most drivers use the IIL as their primary license while maintaining deferred prosecution compliance to avoid criminal conviction. The cost of holding both is substantial: $100 IIL application fee, $75 to $150 for the deferred prosecution restricted license petition filing (varies by county), $70 to $100 per month for IID lease, SR-22 filing fee (typically $25 to $50), and premium increases averaging $140 to $240 per month over baseline rates for 3 years. Total hardship-stage cost over the first year often exceeds $3,000 before reinstatement. If you successfully complete the 5-year deferred prosecution period without violations, the original DUI charge is dismissed and does not appear as a conviction on your driving record—this outcome justifies the dual-license cost for many drivers.

IIL violations trigger automatic revocation by DOL with no hearing required. Common violations: failed breath test recorded by the IID, driving a non-IID-equipped vehicle, missing a required calibration appointment, tampering with the device, or allowing another person to blow into the device to start your vehicle. DOL receives violation reports directly from the IID provider and revokes the IIL within 5 business days. Reinstatement after IIL revocation requires reapplying, paying a new $100 fee, and restarting the ignition interlock compliance period from zero. Deferred prosecution restricted license violations are reported to the court, not DOL. If you are cited for driving outside approved purposes, driving outside approved hours, or driving without the IID when the court order required it, the prosecutor files a motion to revoke the deferred prosecution. The court schedules a show-cause hearing, and if the judge finds you violated the terms, the deferral is terminated and the original DUI charge is reinstated. You lose the restricted license and face trial on the original DUI—most cases result in conviction at that point because you have already admitted the facts by entering the deferral. SR-22 insurance lapses affect both license types identically. DOL suspends driving privileges immediately upon receiving a cancellation notice from your carrier, and you cannot reinstate until you refile SR-22 and pay a $75 administrative reinstatement fee. Many drivers mistakenly believe the IID or the restricted license will keep them legal if SR-22 lapses—it does not. The SR-22 filing is a separate compliance requirement independent of the IID and independent of court-ordered conditions.

Apply for the IIL first if your primary goal is to resume driving immediately with minimal restrictions. The IIL application is administrative—you submit documentation to DOL, pay the fee, and receive the license by mail within 7 to 10 business days in most cases. No court hearing, no prosecutor involvement, no judicial discretion. If you have already installed the IID and obtained SR-22 coverage, you can be back on the road within two weeks of suspension. File for deferred prosecution only if avoiding a DUI conviction on your record justifies the 5-year compliance period and the risk of reinstated criminal charges if you violate any term. Deferred prosecution is a criminal case strategy, not a driving-privilege strategy. The restricted license is a secondary benefit of the deferral program—it does not offer broader driving access than the IIL, and it carries criminal consequences for violations that the IIL does not. Many defense attorneys recommend securing the IIL first to restore income and employment stability, then deciding whether to pursue deferred prosecution based on your long-term record-management goals. If you refuse the breath test and face a 1-year administrative suspension, the IIL may not be available immediately, and deferred prosecution becomes the faster path to restricted driving. Refusal cases require consultation with a DUI defense attorney before choosing a license pathway—judicial practice on IIL eligibility after refusal varies widely by county, and some judges deny IIL applications outright for refusal cases while granting deferred prosecution restricted licenses without objection.