You're required to carry SR-22 and install an ignition interlock device. Your total monthly cost includes insurance premiums, device lease, calibration fees, and filing charges — here's what to expect.
What You're Paying For: SR-22 Filing vs. Interlock Device
SR-22 is a certificate your insurer files with the state proving you carry liability coverage. The filing itself costs $15–$50 as a one-time or annual fee, depending on your state and carrier. Your underlying insurance premium is the expensive part — DUI convictions typically raise rates 70–130% over your pre-violation cost.
An ignition interlock device is physical hardware installed in your vehicle that requires a breath test before the engine starts. You lease the device from a state-approved vendor — not your insurance company. Monthly lease fees run $70–$100, with required calibration appointments every 60 days costing $50–$75 per visit. The device vendor reports all test results and violations directly to the DMV.
These are separate requirements with separate billing. Your insurer handles the SR-22 filing and charges you for high-risk coverage. The interlock vendor bills you directly for device lease and service. Most DUI offenders required to carry SR-22 are also ordered to install an interlock, which means both expenses stack.
Total Monthly Out-of-Pocket: The Full Breakdown
Your combined monthly cost after a DUI with both SR-22 and interlock requirements typically runs $300–$550. Here's how that breaks down.
Insurance premium with SR-22 filing: $150–$350/mo for state minimum liability coverage. Non-standard carriers writing high-risk policies charge significantly more than standard rates. The SR-22 filing fee itself adds $15–$50, often split across 12 months if billed annually. If you're financing a vehicle, your lender requires full coverage — collision and comprehensive — which pushes your premium to $250–$500/mo.
Ignition interlock lease and service: $70–$100/mo for the device lease, plus $50–$75 every 60 days for mandatory calibration and data download appointments. Averaged monthly, calibration adds $25–$40 to your recurring cost. If you trigger a lockout — failed breath test, missed calibration window, tampering alert — the vendor charges a service call fee of $50–$150 to restore device function.
Total combined cost: $245–$490/mo for SR-22 insurance and interlock device maintenance, assuming no lockout incidents or missed calibration appointments. Add lockout service fees and your worst-case monthly cost climbs above $550.
Find out exactly how long SR-22 is required in your state
How Long You Carry Both Requirements
Most states require ignition interlock installation for 6 months to 3 years after a first DUI conviction, depending on your blood alcohol content at arrest and whether you refused chemical testing. SR-22 filing is typically required for 3 years, measured from your conviction date or license reinstatement date.
The interlock requirement often ends before your SR-22 period expires. If you're ordered to carry an interlock for 1 year and SR-22 for 3 years, your total out-of-pocket cost drops significantly after year one when the device is removed. During the interlock period, budget $300–$550/mo. After removal, you're paying only the SR-22 insurance premium — $150–$350/mo — for the remaining filing period.
Some states allow early removal of the interlock if you complete the required period without violations. Your SR-22 filing period cannot be shortened — it runs the full duration ordered by the court or DMV, and any lapse in coverage resets the clock to zero in most states.
Which Carriers Write SR-22 for DUI Offenders
Most standard carriers — State Farm, GEICO, Allstate — either cancel your policy after a DUI or route you to a non-standard subsidiary at a higher price tier. Progressive writes high-risk policies directly and files SR-22 in most states. The General, Direct Auto, and Acceptance Insurance specialize in non-standard coverage and actively write DUI offenders.
Regional non-standard carriers often quote lower premiums than national brands for high-risk drivers. If you're in California, look at Freeway Insurance or Infinity. In the South, Direct Auto and Safe Auto write DUI policies with competitive rates. Your state's assigned risk pool is the last-resort option if no voluntary carrier will write you — premiums are the highest, but coverage is guaranteed.
Carriers that file SR-22 do not install or service ignition interlock devices. You're required to use a state-approved interlock vendor — your DMV provides the list. The vendor reports directly to the state, and your insurer has no involvement in device compliance. Some insurers offer a slight discount if you voluntarily install an interlock, but it's rare and does not offset the device cost.
Cost Reduction Strategies While You're Required to Carry Both
Pay for 6 or 12 months of coverage upfront if you can. Most non-standard carriers charge 10–20% more for monthly payment plans. A $2,400 annual premium paid in full costs $200/mo — the same premium on monthly billing costs $220–$240/mo.
Drop collision and comprehensive coverage if your vehicle is paid off and worth under $5,000. State minimum liability satisfies your SR-22 requirement. Full coverage is legally required only if you're financing the vehicle. Dropping comp and collision can cut your premium by 40–60%.
Ask your interlock vendor about low-income assistance programs. Some states subsidize device lease fees for offenders below a certain income threshold. Assistance programs typically reduce your monthly lease cost by $20–$40, not eliminate it entirely. Your DMV or public defender's office can confirm eligibility.
Never let your SR-22 lapse during the required filing period. A single day without coverage resets your filing clock to zero in most states, which means you start the 3-year requirement over from the lapse date. Set up automatic payments for both your insurance premium and interlock lease to avoid accidental lapses.
What Happens If You Miss a Calibration Appointment
Your interlock device enters a lockout grace period if you miss your scheduled calibration window — typically 5 to 7 days past the due date. The device still allows engine starts during the grace period, but logs the missed appointment and alerts the monitoring authority. Once the grace period expires, the device enters permanent lockout and your vehicle will not start until a technician services it.
Lockout service calls cost $50–$150, and the vendor reports the violation to your DMV. Depending on your state, a missed calibration can extend your interlock requirement by 30 to 90 days or trigger a separate license suspension. The violation also appears on the compliance report your insurer may review at renewal.
Calibration appointments must occur at the vendor's service location — mobile calibration is not available in most states. Plan your schedule around the required 60-day service interval. Most vendors allow you to schedule within a 5-day window before or after your due date, but you must complete the appointment during that window to avoid penalties.
