Does an Ignition Interlock Device Lower Your Insurance Rate?

An ignition interlock device — often called an IID or BAIID (breath alcohol ignition interlock device) — is a court-ordered requirement in most DUI cases. The device prevents your vehicle from starting if it detects alcohol on your breath. It's installed in your car, typically for 6 months to 3 years depending on your state and offense count, and you pay monthly monitoring and calibration fees that range from $70 to $150. The IID is part of your license reinstatement process. In most states, you cannot legally drive after a DUI conviction until the device is installed and you've completed any required suspension period. Some states allow you to install the device immediately and drive with a restricted license during what would otherwise be a hard suspension — this is called a restricted driving permit or ignition interlock restricted license. The device itself does not erase the DUI from your driving record. It's a compliance tool, not a violation remedy. Your insurance company sees the DUI conviction regardless of whether you have an IID installed. That conviction is what drives your rate increase — not the presence or absence of the device.

Insurance carriers do not typically discount your premium simply because you have an ignition interlock device installed. The IID requirement appears on your Motor Vehicle Record (MVR) alongside the DUI conviction itself, and underwriters price based on the conviction — which carries a 70% to 130% rate increase on average, depending on your state, age, and prior record. Some carriers view IID installation as neutral — you're meeting a legal obligation, which keeps you eligible for coverage, but it doesn't demonstrate reduced risk in the underwriter's model. A small number of insurers may offer a modest discount if you voluntarily install an IID beyond the court-mandated period, but this is rare and typically applies only after you've completed the required monitoring term without violations. What matters more than the device itself is your compliance history during the IID period. If your monitoring reports show failed tests, tampering attempts, or missed calibration appointments, some carriers may view you as higher risk and decline coverage or increase rates further. Clean IID records don't lower your premium immediately, but violation-free monitoring protects you from additional rate penalties. Non-standard auto insurance — coverage offered by carriers that specifically work with high-risk drivers, including those with DUIs, violations, or license suspensions — is where most drivers end up after a DUI. These carriers specialize in SR-22 filings and post-conviction coverage. The IID requirement doesn't change which type of carrier you'll need; it's simply part of the documentation they expect to see.

The value of the ignition interlock device for your insurance cost shows up on the back end — not at installation, but during your recovery timeline. Most states allow DUI convictions to fall off your driver record for insurance rating purposes after 3 to 5 years, though the conviction remains on your criminal record permanently in most jurisdictions. If you complete your IID monitoring period with a clean record — no failed breath tests, no missed appointments, no tampering flags — and you maintain continuous insurance coverage without lapses, some carriers will begin reducing your DUI surcharge as you move past the 3-year mark. Drivers who accumulate additional violations during the IID period, or who let their coverage lapse, see those rate reductions delayed or denied. A few insurers offer what's called a "restricted device discount" or "compliance credit" once you've had the IID installed for 12 months or more without incident. This is not common, and the discount is typically small — 5% to 10% — but it's worth asking your agent if your carrier offers it. Progressive, Dairyland, and National General are among the non-standard carriers that sometimes recognize long-term IID compliance in their pricing. The bigger financial benefit comes from shortening the time you're classified as high-risk. Drivers who complete IID requirements on schedule, avoid new violations, and shop rates annually during their 3- to 5-year recovery window can often cut their post-DUI premium in half compared to what they paid immediately after conviction.

Your rate increase after a DUI stems from the conviction itself, not from the compliance measures you're required to complete. When your insurer pulls your MVR — either at renewal or when you apply for new coverage — the DUI appears as a major violation. Underwriters assign a surcharge based on the statistical likelihood that a driver with a DUI will file a claim in the next policy term. Industry data shows drivers with a DUI conviction are roughly 1.8 times more likely to be involved in an at-fault accident than drivers with clean records. The SR-22 requirement — a certificate your insurer files with the state proving you carry the required minimum coverage — adds another layer of cost, but it's small compared to the DUI surcharge itself. SR-22 filing fees typically range from $15 to $50 as a one-time or annual fee, depending on the carrier. Not all insurance companies offer SR-22 filing; you'll likely need a carrier that specializes in high-risk drivers. Your premium also depends on whether your current insurer keeps you or non-renews your policy. Some standard carriers will allow one DUI if you have a long clean history with them, but they'll add the surcharge at your next renewal. Others will non-renew you within 30 to 60 days of the conviction appearing on your record, forcing you into the non-standard market where premiums are higher. The ignition interlock device, the SR-22 filing, and any license reinstatement fees are compliance costs — you pay them to regain legal driving status. They don't increase your insurance premium directly, but they're part of the total financial impact of a DUI conviction, which typically runs $10,000 to $15,000 over three years when you add up fines, legal fees, monitoring costs, higher insurance premiums, and reinstatement fees.

If you've been required to install an ignition interlock device and you're trying to manage the insurance impact, follow these steps in order: 1. Install the IID before your reinstatement deadline. Most states give you 30 days from your court order or DMV notice to have the device installed by a certified provider. Missing this deadline can extend your suspension and create a coverage gap that raises your rates further. Keep your installation receipt — your insurer and the DMV will both ask for it. 2. Contact your current insurer within 10 days of your conviction. Ask directly whether they will continue your coverage or non-renew your policy. If they're keeping you, ask when the DUI surcharge takes effect and whether they offer SR-22 filing. If they're non-renewing you, you need to shop for a non-standard carrier immediately to avoid a lapse before your current policy ends. 3. Get quotes from at least three non-standard carriers before your current policy expires. Call agents who specialize in high-risk coverage — not online quote tools, which often exclude DUI drivers. Ask each carrier if they recognize IID compliance and whether they offer any discount after 12 months of clean monitoring. Carriers to contact: Progressive, Dairyland, The General, Bristol West, National General, Acceptance Insurance. 4. Maintain continuous coverage and pay your IID monitoring fees on time. Any lapse in insurance — even 24 hours — adds another surcharge and can reset your SR-22 filing period in some states. Any missed IID calibration or failed test can trigger non-renewal from your current insurer and higher quotes from the next one. 5. Shop your rate annually for the next three years. Your premium should decrease each year as you move further from the conviction date, especially once you pass the 36-month mark. Carriers price DUI risk differently, and the cheapest option at year one may not be the cheapest at year three. Loyalty does not pay in the non-standard market — switch carriers when a better rate appears.