Should You Install an IID Early to Start the Clock in Washington?

Early installation makes sense in two specific situations: when you're within 7–10 days of your court-ordered start date and need buffer time for vendor scheduling, or when you're applying for an IIDL and want the device installed before DOL processes your application. Washington DOL requires proof of IID installation before issuing an IIDL. If the vendor can't schedule installation for two weeks and DOL takes another week to process your IIDL application, that's three weeks you're not legally driving to work. Installing the device before you submit the IIDL application compresses that gap to the DOL processing window only — typically 2–5 business days. Early installation also protects you if you've had a compliance violation (failed startup test, missed rolling retest, tampering flag). Some Washington courts require 60–120 consecutive violation-free days before your IID period officially begins. Installing early and running clean for 30 days before your court start date gives you a compliance buffer. One failed test in month two doesn't restart your entire clock if you banked clean days beforehand.

IID vendors in Washington charge $75–$125 installation, $75–$95 per month rental, $50–$75 monthly monitoring and calibration, and $75–$100 removal. A typical 12-month court-ordered IID period costs $1,400–$2,100 total. Every month you install early adds $125–$170 to that stack with zero credit toward your compliance period. If you install 60 days before your court start date, you've added $250–$340 in rental and monitoring fees. If your court order or DOL later extends your IID period due to a compliance violation, you're paying for the early months and the extended months — compounding the cost with no path to recover the early fees. Some drivers install early hoping the court will credit "time served" if they show clean compliance records at a review hearing. Washington courts have no statutory requirement to credit early installation time. A judge may reduce your IID period at a review hearing based on clean compliance, but that discretion is rare and unpredictable. Budget for the full ordered period, not an optimistic reduction.

Washington DUI cases trigger two separate IID requirements: a criminal court order tied to your conviction, and a DOL administrative ignition interlock driver's license requirement tied to your license suspension. These periods often overlap but run on independent clocks with different start dates, durations, and compliance rules. A first-offense DUI with a BAC of 0.08–0.14 typically results in a 1-year court-ordered IID period starting on your sentencing date, and a 1-year DOL IIDL period starting the day DOL issues your restricted license. If you're sentenced 90 days after arrest and apply for an IIDL 30 days after sentencing, your DOL clock starts 120 days after your court clock. Your court requirement ends 12 months post-sentencing, but your IIDL requirement runs an additional 4 months. You must satisfy both periods completely before you're eligible for full license reinstatement. Installing early doesn't synchronize these timelines — it just extends the total calendar time you're paying IID fees. The only way to compress total IID time is to apply for your IIDL as soon as you're eligible (typically the day after your court sentencing) so both clocks start as close together as possible.

Installing an IID before your court sentencing date or before DOL issues your IIDL creates a compliance gap where you're paying rental fees but accruing zero credit toward any legal requirement. Washington courts and DOL do not track or credit unofficial IID use — the device must be installed under an active court order or valid IIDL for the time to count. If you install the device while your criminal case is still pending, hoping to show the court you're taking responsibility, the installation date and compliance records may be cited as mitigating evidence at sentencing — but the time does not count toward your IID requirement. Your court-ordered period starts the day specified in the sentencing order, which is always post-conviction. Similarly, if you install the device but delay applying for an IIDL for 60 days, those 60 days of IID rental fees buy you nothing. Your DOL compliance clock starts the day the IIDL is issued, not the day the device was installed. The only benefit is eliminating the installation scheduling delay once you apply — but that benefit rarely justifies 30+ days of early rental costs.

The most cost-efficient path is to install the IID within 3–5 business days before your court-ordered start date or immediately after submitting your DOL IIDL application. This compresses installation scheduling risk without paying for weeks of unused compliance time. Apply for your IIDL the same week you're sentenced. Washington DOL allows IIDL applications the day after sentencing for DUI convictions. Applying immediately synchronizes your court and DOL IID timelines as closely as possible, minimizing the total calendar months you're subject to either requirement. Waiting 90 days to apply for an IIDL extends your total restricted license period by 90 days — even though your court IID requirement hasn't changed. Choose a vendor with next-day or 48-hour installation availability. Intoxalock, Smart Start, and LifeSafer operate in Washington and typically offer installation within 2–3 business days of approval. Schedule installation for the latest possible date that still meets your court or DOL deadline — not the earliest. Every day earlier is a day you pay rental fees with no compliance credit.