Ignition Interlock Device (IID) in Connecticut
Connecticut uses the term "DUI" for impaired driving offenses. IID requirement: required for all dui offenses. First offense duration: 1 year. Monthly cost: $70-$110.
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Quick Answer
Connecticut requires IID for all DUI convictions, including first offenses. The device must be installed on all vehicles registered to or operated by the offender.
IID Duration by Offense
| Offense | IID Duration |
|---|---|
| 1st Offense | 1 year |
| 2nd Offense | 3 years |
| 3rd Offense | Permanent (lifetime) |
| 4th+ Offense | Permanent (lifetime) |
BAC threshold: Any DUI conviction (no BAC threshold — all offenders)
IID Cost Breakdown in Connecticut
| Item | Cost | Notes |
|---|---|---|
| Installation | $100-$175 | One-time fee. Takes about 1 hour. |
| Monthly Lease + Monitoring | $70-$110/mo | Includes device lease and monitoring. |
| Calibration | $25-$75 | Every 60 days. |
| Removal | $50-$100 | One-time fee when IID period ends. |
| Estimated Total (6 months) | $570-$935 | Install + 6 months lease + removal. |
| Estimated Total (12 months) | $990-$1,595 | Install + 12 months lease + removal. |
One-time
Lease + monitoring
Every 60 days
One-time
All-in estimate
All-in estimate
Approved IID Providers in Connecticut
Contact providers directly for current pricing and service center locations in Connecticut. Compare at least 2-3 providers before choosing — prices and service quality vary.
Restricted License with IID
Connecticut issues an IID-restricted license that allows driving to any destination with the device installed. The restricted license is available after the hard suspension period ends.
Tampering / Circumvention Penalties
Tampering with an IID in Connecticut carries up to 1 year in jail, fines, and extension of the IID period. The court may also revoke the restricted license entirely.
Early Removal
Connecticut does not allow early removal for first or second offenses. Third-offense and subsequent offenders face a permanent IID requirement.
Connecticut-Specific Notes
Connecticut has a particularly harsh IID rule for third offenders: the IID is permanent (lifetime). This is among the strictest in the nation for repeat offenders.
Frequently Asked Questions
Is an IID required for a first DUI in Connecticut?
How much does an IID cost in Connecticut?
Is a third DUI a permanent IID in Connecticut?
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