
Ignition interlock devices (IIDs) are often required following a DUI incident to prevent drunk driving. The driver must take a breath test and pass it to start the vehicle. If their result is above the state's limit, they will be unable to start the car. While a DUI will likely impact insurance costs, it is unclear whether voluntarily installing an IID will affect insurance rates. Some insurance companies may raise rates, while others may offer discounts for safety devices. It is important to understand your insurance company's policies and notify them of any DUI convictions or IID installations.
| Characteristics | Values |
|---|---|
| Impact on insurance rates | It depends on the individual insurance company and policy. Some insurance companies may raise rates for drivers with ignition interlock devices, while others may not. |
| Installation cost | $70 to $150 |
| Monthly cost | $60 to $90 |
| Installation | Wired directly into the vehicle's ignition. |
| Installation time | 1 hour |
| Installation by | A professional who is trained in installing interlock devices. |
| Calibration | The device is calibrated to the user and anyone else who may drive the vehicle. |
| Calibration time | 60 to 90 days |
| Discounts | Some states offer financial assistance to customers who qualify. |
| Rebates | Intoxalock offers a $100 rebate for customers signing a six-month lease or longer. |
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What You'll Learn
- Insurance companies may raise rates for drivers with interlocks
- A DUI will impact insurance rates and could result in a policy cancellation
- Interlocks are often required following a DUI incident
- Interlocks are installed to prevent drunk driving
- Interlocks may be installed voluntarily as part of a recovery program

Insurance companies may raise rates for drivers with interlocks
Firstly, it's important to understand that a DUI/DWI conviction will significantly increase insurance rates, regardless of whether an interlock device is installed. The increase in insurance rates after a DUI/DWI can range from 28% to 371%, with an average increase of 80% that typically lasts for at least three years. Some insurance companies may even drop customers after a DUI/DWI conviction, as they are now considered high-risk drivers.
In some states, insurance companies may offer discounts or lower rates for drivers with interlock devices, recognizing that these devices reduce the likelihood of reoffending. However, this practice is not yet widespread across the United States. The impact of an interlock device on insurance rates may also depend on whether the device was voluntarily installed or required by law. For example, if a driver chooses to install an interlock device as part of their recovery program or to prevent young drivers from drinking and driving, insurance companies may view this as a positive step and offer a discount. On the other hand, if the interlock device is mandated by the court or the state after a DUI/DWI conviction, insurance companies may not offer any discounts, as the driver is still considered high-risk.
Additionally, the impact of an interlock device on insurance rates may vary depending on the insurance company's perception of risk. Some insurance companies may argue that the presence of an interlock device does not change the fact that the driver has a history of drunk driving, which is a significant risk factor. In these cases, insurance rates may remain high, regardless of the interlock device. Overall, while interlock devices can help reduce drunk driving and may be considered by insurance companies when determining rates, the impact on insurance rates is not consistent across the industry, and other factors, such as a driver's history and state regulations, also come into play.
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A DUI will impact insurance rates and could result in a policy cancellation
A DUI conviction will have a significant impact on your insurance rates and could result in your policy being cancelled. Insurance companies view those with a DUI as high-risk drivers, and as a result, insurance rates are likely to increase substantially. The increase in insurance rates can vary depending on the state and insurance company, with an average increase of 80%. In some states, a single DUI can more than double insurance rates. For example, in Michigan, a DUI can cause insurance rates to double, and in North Carolina, rates are more than four times higher.
The impact of a DUI on insurance premiums can vary significantly by state and insurer. Some states have laws that limit how long an insurer can charge higher premiums, while others do not. For instance, in states with lenient regulations, premiums may return to normal sooner, whereas in states with stricter laws, there could be prolonged financial penalties.
After a DUI, insurance companies may refuse to cover you altogether, or they may only offer policies with higher deductibles and lower coverage limits. If your insurance company decides to cancel your policy, you will be required by law to secure alternative coverage before your current policy expires. In Florida, insurers must provide written notice at least 45 days before an auto insurance policy is cancelled.
In addition to higher premiums and potential policy cancellation, individuals convicted of a DUI may also be subject to stringent insurance requirements. For example, in Florida, drivers convicted of a DUI must carry increased insurance coverage, including bodily injury liability coverage of $100,000 per person, $300,000 per accident, and $50,000 for property damage.
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Interlocks are often required following a DUI incident
An ignition interlock device (IID) is a modern piece of technology that prevents drunk driving. It requires the driver to provide a sober breath sample before operating their vehicle. While often mandated for those with DUI convictions, it is not necessary to have a DUI conviction to install one. For example, a parent concerned about their teenager's behaviour may choose to install one.
In the case of a DUI conviction, the courts or state Department of Motor Vehicles may require the installation of an IID before an individual can drive again. This is a costly process, with legal fees, fines, and jail time, alongside the installation of the device. Insurance rates can also skyrocket following a DUI, increasing on average by 80% for three years.
Installation of an IID takes around an hour. A technician installs and calibrates the device to the user and any other drivers of the vehicle. This involves the user humming and blowing into the device or having their picture taken for future tests. The technician will also explain the device's various sounds, lights, and messages, and the user will receive a manual for further reference.
While a DUI conviction will affect insurance rates, it is unclear whether voluntarily installing an IID will have an impact. Some insurance companies offer discounts for safety devices, so it may be worth informing your insurance company of a voluntarily installed IID. However, if the individual with a DUI conviction is added to an insurance policy, this will likely result in increased rates.
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Interlocks are installed to prevent drunk driving
Interlock devices, also known as ignition interlock devices (IIDs), are a proven way to prevent drunk driving. These devices are wired to the vehicle's ignition and installed on the dashboard. They require the driver to blow into a breathalyser before starting the vehicle. If the device detects a blood alcohol concentration (BAC) above the legal limit, the vehicle will not start. This is an effective way to prevent drunk driving, as it stops the driver from operating the vehicle while impaired.
In addition to the initial breath test, some IIDs require the driver to provide additional breath samples at random intervals while the vehicle is in motion. This ensures that the driver does not consume alcohol while driving. IIDs are designed to be tamper-proof and are calibrated to prevent false readings. They are also equipped with a data recorder, which logs all breath tests and any attempts to tamper with the device.
The effectiveness of IIDs in reducing drunk driving has been demonstrated in several studies. According to the Centers for Disease Control and Prevention (CDC), IIDs reduce repeat drunk driving offenses by approximately 70% while they are installed. A study by the National Institute of Health found a 16% reduction in fatal crashes involving drunk drivers and a 65% reduction in DUI recidivism with the use of IIDs. These devices are particularly useful for repeat offenders and those with a history of drunk driving convictions.
While IIDs are an effective tool, some critics argue that their impact may only be temporary. Once the device is removed, there is a possibility that offenders may resume their dangerous behaviour. Additionally, the costs of installation, maintenance, and calibration can be a significant burden, especially for those who cannot afford them. Despite these concerns, IIDs are widely recognised as a valuable measure to enhance road safety and prevent drunk driving.
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Interlocks may be installed voluntarily as part of a recovery program
Interlock devices are often installed in vehicles to prevent drunk driving. While some people install interlocks because they are legally required to do so after a DUI conviction, others may choose to install them voluntarily as a preventative measure or as part of a recovery program.
Voluntary installation of an interlock device can be beneficial for those in recovery from alcoholism or other substance abuse issues. It can provide an extra layer of support and accountability, helping to ensure that individuals do not drive under the influence. This can be especially useful for those who are undergoing alcohol treatment and need to maintain their mobility to access meetings and work. For example, a person in Oregon who had a previous DUI shared on Reddit that they installed an interlock device to prevent future incidents. Similarly, a person in recovery in Houston expressed interest in installing an interlock device to prevent them from driving under the influence in the future.
In addition, parents of teenage drivers may choose to install interlock devices to prevent their children from drinking and driving. This can provide peace of mind and reduce the risk of alcohol-related accidents, which are a leading cause of road fatalities among young people. Employers may also install interlock devices in company vehicles to keep employees safe and avoid legal action in the event of an alcohol-related crash.
From a financial perspective, installing an interlock device may even lead to savings on auto insurance rates. While a DUI conviction typically results in significantly higher insurance rates, some insurance companies offer discounts for safety features like airbags and anti-theft systems. Therefore, it is possible that voluntarily installing an interlock device could qualify for a similar discount. However, it is important to note that insurance rates for young drivers are generally higher, and adding an interlock device may not offset this cost.
Overall, voluntarily installing an interlock device as part of a recovery program can be a responsible decision that provides support and accountability for individuals in recovery, peace of mind for parents of teenage drivers, and a means of risk mitigation for employers.
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Frequently asked questions
Yes, a DUI conviction is likely to impact your insurance rates. On average, insurance premiums increase by 80% and remain affected for at least three years. Some insurance providers may even drop you as a customer.
Yes, the court or the state Department of Motor Vehicles may require you to install an ignition interlock device (IID) in your vehicle before you can drive again.
It depends on the insurance company and policy. Some insurance companies may raise rates, while others may not. Voluntarily installing an IID may result in a discount, but it is important to understand your insurance company's policies.
An ignition interlock device or IID is a breathalyzer installed in your car to prevent you from operating the vehicle if you have consumed alcohol. The driver must take and pass a breath test to start the vehicle.
If the breath alcohol concentration (BrAC) is above the state's allowed limit, the vehicle will not start. During a trip, the device may also request retests at random intervals to prevent device tampering and ensure the driver remains sober.











































