SR-22 and Interlock: Which Clock Ends First, What You Pay

Your SR-22 filing requirement is imposed by your state's Department of Motor Vehicles or licensing authority and typically lasts 3 years from the date of conviction or license reinstatement, depending on your state. Your ignition interlock device requirement is imposed by the court or a separate administrative body and runs for a period set by statute or judge's order — often 6 months to 3 years, depending on offense severity and whether it's a first or repeat DUI. These are separate legal obligations tracked by different agencies. The DMV monitors your SR-22 filing and confirms your carrier is maintaining continuous coverage. The court, probation office, or state ignition interlock program office monitors your IID installation, calibration appointments, and violation-free use. Completing one does not notify the other agency or automatically satisfy the second requirement. Most states structure the timelines so they overlap significantly but do not end on the same date. If you're ordered to 1 year of interlock and 3 years of SR-22, you'll finish the interlock requirement first but still owe 2 more years of SR-22 filing and the premium surcharge that comes with it. If the order is reversed — 3 years of interlock and 1 year of SR-22 — you'll finish the SR-22 filing requirement first but still pay monthly IID lease fees and calibration costs for 2 additional years.

During the overlap period when both SR-22 and ignition interlock are active, you're paying three distinct monthly costs. Your SR-22 insurance premium typically runs $150–$250/mo for state minimum liability coverage, elevated by the DUI conviction and the SR-22 filing itself. Some carriers add an SR-22 filing fee of $25–$50 spread across the policy term, though this is often a one-time charge. Your ignition interlock device lease typically costs $70–$150/mo, depending on the state, provider, and device model. This fee includes the device, installation, and one monthly calibration appointment. Additional calibration visits, lockout resets after a failed test, or early removal fees are billed separately. You may also be subject to court-ordered DUI program fees, probation supervision fees, or license reinstatement fees during this period. These are one-time or periodic costs, not monthly recurring charges, but they appear on the same calendar as your insurance and interlock payments. Total monthly outlay during the overlap period for most drivers is $220–$400, not counting fuel, registration, or standard vehicle maintenance.

In most states, ignition interlock requirements for a first DUI run shorter than SR-22 filing periods. California requires 6 months of IID for a first offense but 3 years of SR-22. Texas requires a minimum of 1 year of interlock and 2 years of SR-22 for most DUI convictions. Arizona requires 12 months of interlock for a first extreme DUI but 3 years of SR-22 for license reinstatement after suspension. Once your interlock period ends, you must schedule a removal appointment with your IID provider and obtain a certificate of completion. This certificate goes to the court or licensing authority that ordered the device. Until that agency processes the certificate and updates your driving record, the requirement remains active on paper. Processing can take 2–6 weeks in most states. Your SR-22 filing continues on its own timeline. Removing the interlock device has no effect on the SR-22 clock. You're still required to maintain continuous SR-22 coverage through your original end date, and your carrier will still report lapses to the DMV if you cancel or let the policy expire. The premium may decrease slightly after interlock removal if your carrier views IID completion as a risk reduction signal, but most carriers do not automatically adjust rates mid-term. In states with longer IID requirements for repeat offenders or aggravated DUI, the interlock period can outlast the SR-22 period. If you're ordered to 5 years of interlock and 3 years of SR-22, your SR-22 filing ends first. You're no longer required to carry SR-22 after year three, and you can switch to a standard non-SR-22 policy. The interlock device stays installed for 2 additional years, and you continue paying the monthly lease and calibration fees.

If your SR-22 policy lapses for any reason during the filing period — cancellation, nonpayment, or switching carriers without filing a new SR-22 — your insurance company is required to notify the DMV electronically within 10–15 days in most states. The DMV treats this as a compliance failure and typically suspends your license immediately. The SR-22 clock stops. When you reinstate coverage and refile, the clock restarts from day one in most states. If you miss a calibration appointment, accumulate failed breath tests, or tamper with your ignition interlock device, your IID provider reports the violation to the court or monitoring agency. The court may extend your interlock period, add additional months as a penalty, or issue a new suspension. Some states reset the interlock clock entirely for major violations like tampering or repeated failed tests. These clocks do not run concurrently once reset. If you lapse your SR-22 in year two and reinstate it, you owe three new years of filing from the reinstatement date. If the court extends your interlock requirement from 1 year to 18 months due to a violation, you owe the additional 6 months regardless of where your SR-22 timeline stands. The two requirements do not offset each other.

Request a compliance status report from your DMV or licensing authority at least 60 days before you believe your SR-22 period ends. Most states provide this online or by phone. The report shows your SR-22 start date, required end date, and any lapses that reset the clock. Do not rely on your carrier to track this — they file the form, but the state determines compliance. Request a compliance summary from your ignition interlock provider or the court-appointed monitoring agency 60 days before your scheduled IID removal date. This document shows your installation date, required period, any violations or extensions, and your projected removal eligibility date. Some states require a clean violation-free period of 3–6 months immediately before removal, which can delay your end date even if you've completed the total required months. If your SR-22 ends first, contact your insurance carrier 30 days before the end date and request removal of the SR-22 filing from your policy. Some carriers reduce your premium immediately. Others require you to request a new quote or switch to a standard policy at renewal. Do not cancel your policy to force a rate drop — cancellation during the filing period, even on the final day, can trigger a lapse notice. If your interlock ends first, schedule removal with your IID provider and obtain the certificate of completion before your SR-22 filing ends. Some carriers offer a modest rate reduction for drivers who complete IID requirements ahead of schedule, but you must request the adjustment and provide proof.