Ignition Interlock Device (IID) in Maryland
Maryland uses the term "DUI / DWI" for impaired driving offenses. IID requirement: required for all dui offenses. First offense duration: 6 months (minimum participation in IID program). Monthly cost: $65-$100.
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Quick Answer
Maryland requires IID for all DUI convictions through its IID program. Offenders may participate in the IID program to receive driving privileges during the suspension period. For repeat offenders, IID is mandatory for license reinstatement.
IID Duration by Offense
| Offense | IID Duration |
|---|---|
| 1st Offense | 6 months (minimum participation in IID program) |
| 2nd Offense | 1 year |
| 3rd Offense | 3 years |
| 4th+ Offense | 3 years or longer |
BAC threshold: Any DUI conviction (IID program available for all offenders)
IID Cost Breakdown in Maryland
| Item | Cost | Notes |
|---|---|---|
| Installation | $75-$150 | One-time fee. Takes about 1 hour. |
| Monthly Lease + Monitoring | $65-$100/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) | $515-$850 | Install + 6 months lease + removal. |
| Estimated Total (12 months) | $905-$1,450 | Install + 12 months lease + removal. |
One-time
Lease + monitoring
Every 60 days
One-time
All-in estimate
All-in estimate
Approved IID Providers in Maryland
Contact providers directly for current pricing and service center locations in Maryland. Compare at least 2-3 providers before choosing — prices and service quality vary.
Restricted License with IID
Maryland's IID program allows unrestricted driving with the device installed — no destination limitations. This is a significant benefit over the modified license without IID, which limits driving to work and essential errands.
Tampering / Circumvention Penalties
Tampering with an IID in Maryland is a misdemeanor carrying up to 1 year in jail and fines up to $1,000. The MVA may extend the IID requirement period.
Early Removal
Maryland does not allow early removal from the IID program.
Maryland-Specific Notes
Maryland distinguishes between DUI (BAC 0.08%+) and DWI (BAC 0.07-0.079%). Both can trigger IID requirements. Maryland's IID program is administered by the Motor Vehicle Administration (MVA). The program allows full driving privileges with IID, making it similar to California's approach.
Frequently Asked Questions
Is an IID required for a first DUI in Maryland?
How long do I need an IID in Maryland?
How much does an IID cost in Maryland?
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