Ignition Interlock vs SR-22: Real DUI Cost Comparison by State

A first-offense DUI triggers two separate ongoing costs that stack, not replace each other. Ignition interlock device installation runs $70–$150 upfront, then $60–$90 monthly for monitoring and calibration — required for 6 months to 3 years depending on your state and BAC at arrest. SR-22 insurance adds 70–130% to your liability premium, turning a $95/month standard policy into $160–$220/month for high-risk coverage. Most drivers budget for the interlock because the court order is explicit. The SR-22 rate increase catches them at renewal when their carrier either cancels or re-rates them into a non-standard tier. Your total monthly compliance cost sits between $220 and $310 for the duration your state mandates both requirements simultaneously. The expensive overlap is the IID monitoring period. If your state requires 12 months of interlock but only 3 years of SR-22, you carry both costs for the first year, then SR-22-only insurance for the remaining two years. California requires 6 months IID minimum but 3 years SR-22 — you drop the $75/month device fee after month six, but the elevated insurance premium continues until year three.

Carriers tier high-risk drivers by violation severity and compliance complexity. A DUI with an active ignition interlock requirement signals to underwriters that you are still within the monitoring window — typically the first 6 to 36 months post-conviction. That window corresponds to the highest re-offense risk period, and carriers price it accordingly. SR-22 filings alone trigger a rate increase of 70–90% with most non-standard carriers. Add an active IID requirement and the same carrier may quote you 110–130% above your pre-DUI rate, or decline to write you entirely until the device is removed. Progressive, Acceptance, and National General all write high-risk SR-22 policies, but their underwriting guidelines treat active IID differently — Progressive typically writes you immediately, National General may require 90 days of clean IID logs before binding, Acceptance varies by state. Once your IID requirement ends and the device is removed, you remain in SR-22 filing status but your risk profile drops. Some carriers will re-rate you at that point — dropping your premium 15–25% — without requiring you to re-shop. Others hold the higher rate until your SR-22 period ends. This is why the month you remove your interlock is the best time to re-quote, not the month your SR-22 filing expires.

First-offense DUI interlock requirements range from zero months in some states to 12 months in most, with California, Washington, and Arizona mandating longer periods for BAC above .15 or refusal cases. Your SR-22 filing period runs simultaneously but usually extends beyond the IID requirement — creating a two-phase cost structure. Florida requires 6 months IID minimum and 3 years SR-22. You pay $75/month device monitoring plus $180/month SR-22 insurance for the first six months, then $180/month SR-22-only for the remaining 30 months. Total three-year DUI cost: $8,640. Texas requires 12 months IID for first offense and 2 years SR-22 — your overlap is the full first year, then one year of SR-22-only insurance. Total two-year cost: $6,720. Second-offense and refusal cases extend IID duration to 2–3 years in most states, meaning your overlap period doubles or triples. The monthly burn rate stays the same, but the total duration of dual compliance costs climbs from $2,700 over 12 months to $7,200 over 30 months. This is the penalty structure aggregators and general insurance sites rarely surface — they quote SR-22 rates in isolation and omit the device monitoring cost entirely.

Not every carrier that writes SR-22 will bind a policy while your interlock is still installed. Progressive and Acceptance are the two most consistent writers during the active IID period — they treat the device as a compliance tool, not a disqualifier. The General and National General require 30–90 days of clean interlock logs before they will quote you in most states. State Farm and Allstate route nearly all active-IID drivers to their non-standard subsidiaries or decline entirely. If your current carrier cancels you after your DUI conviction, you have roughly 30 days to secure new coverage and file SR-22 before your license suspends. That window is when IID status matters most — if you are still waiting for your interlock installation appointment or have fewer than 90 days of logs, your carrier pool shrinks to Progressive, Acceptance, and a handful of regional non-standard carriers. Once your IID requirement ends and the device is removed, your carrier options expand. Drivers who were declined by National General during their interlock period often get approved within 60 days of removal. This is why re-shopping immediately after device removal produces better rates than waiting until your full SR-22 period expires — you access a wider carrier pool while still carrying the filing, and rates drop as soon as underwriting sees the IID requirement is closed.

SR-22 filing requirements and ignition interlock orders are issued by your state of conviction, but enforcement depends on whether your new state recognizes the original order. Most states honor out-of-state DUI convictions and require you to continue SR-22 filing if it was mandated at sentencing. IID requirements are less portable — some states require you to remove the device if you establish residency elsewhere, others require you to complete the original order regardless of where you move. If you move from Florida to Texas mid-way through a 6-month IID requirement, Texas DMV may allow you to complete the Florida-ordered interlock period using a Texas-licensed IID provider, but you must re-file SR-22 in Texas and meet Texas liability minimums. Your insurance carrier may not be licensed in Texas, forcing you to re-shop. The gap between cancellation in your old state and binding in your new state can trigger a lapse — which resets your SR-22 clock to day zero in most states. The cheapest move strategy: complete your IID requirement before relocating if your timeline allows it. Removing the device, closing the monitoring requirement, and then moving gives you access to more carriers in your new state and eliminates the risk of your new state extending your interlock period under their own guidelines. If you must move during your requirement, contact your new state DMV before canceling your old policy — some states issue a compliance letter that prevents lapse penalties if you can prove continuous coverage.

Your ignition interlock provider notifies your state DMV when your monitoring period ends and the device is removed. That notification does not automatically reach your insurance carrier. Most high-risk drivers continue paying the active-IID premium rate for 3–6 months after removal because they assume their carrier will adjust automatically — carriers do not. The day your IID requirement closes is the day you should request re-rating or re-shop. Call your current carrier, confirm the device is removed, and ask for re-underwriting at the SR-22-only rate. If they decline to drop your premium, request a quote from Progressive, National General, and Acceptance — all three tier active-IID and post-IID differently, and the spread between their quotes averages $40–$70/month for the same driver profile. Your SR-22 filing continues after IID removal — the filing period is longer than the device requirement in nearly every state. You remain in non-standard insurance, but your rate should drop 15–30% once underwriting confirms the interlock is gone. Drivers who wait until their SR-22 period fully expires to re-shop leave $600–$1,200 on the table by paying the active-IID rate long after the device was removed.