How Much an Ignition Interlock Device Costs After a DUI

Installation fees range from $70 to $150 depending on your state and the approved vendor you choose. The technician mounts the device to your vehicle's ignition system, calibrates the breath sensor, and walks you through the startup sequence. Most installations take 60 to 90 minutes. Some vendors advertise lower installation fees but offset the difference with higher monthly monitoring costs. Compare total cost over your required IID period, not just the install price. A $50 installation with $90 monthly monitoring costs more over six months than a $120 installation with $65 monthly fees. You cannot install an IID yourself. State programs require certified technicians from approved vendors, and your court order or DMV reinstatement notice specifies which vendors operate in your county. Installing a non-approved device voids compliance and extends your suspension.

Monthly monitoring fees run $60 to $100 per month for the duration of your IID requirement. This covers device calibration, data downloads, and compliance reporting to your state's monitoring authority. Most states require monthly service appointments where the technician downloads your breath test logs and recalibrates the sensor. Missed calibration appointments trigger compliance violations in most states. Your IID vendor reports missed appointments to the DMV or court within 48 to 72 hours, and many states add 30 to 90 days to your IID requirement for each missed service window. Set calendar reminders for every appointment date, not just the first one. Some vendors charge extra for camera-equipped devices. States with camera requirements (California, Washington, New York for repeat offenders) add $10 to $25 per month to verify the breath sample submitter matches the licensed driver. If your state does not mandate a camera, the base monitoring fee applies.

First-offense DUI IID requirements typically run 6 months to 12 months. Second offenses push that window to 1 to 3 years depending on the state. Aggravated DUI cases (BAC .15 or higher, refusal, minor in the vehicle) often trigger the same duration as second-offense cases even for first-time offenders. Your IID clock starts the day the device is installed and certified, not the day of your conviction or the day your hardship license is issued. Installing the device two weeks late extends your compliance end date by two weeks. Some states tie hardship license eligibility to IID installation, meaning you cannot drive legally until the device is active and reported to the DMV. Violations reset the clock. Failed breath tests, missed calibration appointments, and tamper alerts can add 60 to 180 days to your required period depending on state rules and the severity of the violation. Most states count rolling compliance periods, not fixed terms, so a violation in month 10 of a 12-month requirement can push your total obligation to 14 or 15 months.

Removal costs another $50 to $100 once your IID period ends. The same certified technician who installed the device uninstalls it, verifies your ignition system functions normally, and submits final compliance documentation to your state monitoring authority. You cannot remove the device yourself even after your required period ends. Some states require a final compliance report before your hardship license converts to full reinstatement. The removal technician generates this report during the uninstall appointment, but processing can take 7 to 14 business days. If your hardship license expires before the compliance report reaches the DMV, you may face a gap period where you cannot drive legally. Budget for the full cost stack before your first installation appointment. A 12-month IID requirement at $80 installation, $75 monthly monitoring, and $75 removal totals $1,055. Add SR-22 insurance premiums (typically $400 to $1,200 annually for DUI offenders) and hardship license application fees, and first-year post-DUI compliance costs often exceed $2,500.

States approve specific IID vendors by region. Rural counties may have only one or two approved providers, limiting your ability to shop for lower rates. Urban areas often have four to six competing vendors, giving you leverage to negotiate installation or request payment plans. Some vendors offer sliding-scale pricing for low-income drivers. Eligibility requirements vary, but most programs require proof of income below 200% of the federal poverty line and documentation that you need the device for employment or medical appointments. Ask every approved vendor in your county whether they participate in a state-funded subsidy program. Payment plans spread the cost but rarely reduce it. A vendor charging $900 over 12 months may offer $75 monthly payments instead of $70 installation plus $70 monthly monitoring, but total cost stays the same. Read the service agreement carefully: some vendors add interest or administrative fees to installment plans that push total cost higher than upfront payment.

IID requirements do not pause for financial hardship in most states. Missing your installation deadline extends your suspension period and delays hardship license eligibility. Courts rarely waive IID mandates for affordability reasons, even when the device cost exceeds your monthly income. Some states fund indigent IID programs that cover installation and reduce monthly fees to $20 to $40 for qualifying drivers. Application requires financial documentation (pay stubs, tax returns, benefit statements) and proof that you need driving privileges for employment, education, or medical treatment. Not all states operate these programs, and waiting lists can run 30 to 90 days. If your state does not offer subsidized IID access and you cannot afford the device, your options narrow to public transit, rideshare, employer carpool programs, or extended suspension. Driving without an installed IID while under an IID mandate is a separate criminal offense in most states, typically charged as driving on a suspended license with enhanced penalties.

Your SR-22 insurance premium does not include IID costs. These are separate expenses billed by different vendors. Most drivers discovering this after budgeting only for insurance face a $1,000+ surprise when the IID requirement letter arrives. Some insurers offer small discounts (5% to 10%) for IID-equipped vehicles because the device prevents impaired operation. Ask your agent whether your carrier applies this credit. The discount rarely offsets the device cost, but $50 annually over a three-year SR-22 filing period reduces total expense. Non-owner SR-22 policies do not exempt you from IID requirements if your state mandates the device. The IID attaches to any vehicle you operate, not just a vehicle you own. If you drive a borrowed car, a rental, or an employer's vehicle, that vehicle must have a certified IID installed or you violate your hardship license terms.