Ignition Interlock Device (IID) in Texas
Texas uses the term "DWI" for impaired driving offenses. IID requirement: required for high bac or repeat offenses. First offense duration: 6 months to 1 year (if BAC 0.15%+ or court-ordered). Monthly cost: $60-$100.
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Quick Answer
Texas requires IID for DWI with BAC of 0.15% or higher on first offense, and for all second and subsequent DWI offenses. For standard first-offense DWI with BAC below 0.15%, IID is at the judge's discretion but commonly ordered as a condition of bond or probation.
IID Duration by Offense
| Offense | IID Duration |
|---|---|
| 1st Offense | 6 months to 1 year (if BAC 0.15%+ or court-ordered) |
| 2nd Offense | 1 year |
| 3rd Offense | 2 years |
| 4th+ Offense | Court-determined (typically 2+ years) |
BAC threshold: 0.15% BAC for mandatory first offense; all repeat offenses. Judges commonly order IID for all DWI as condition of bond.
IID Cost Breakdown in Texas
| Item | Cost | Notes |
|---|---|---|
| Installation | $70-$150 | One-time fee. Takes about 1 hour. |
| Monthly Lease + Monitoring | $60-$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) | $480-$850 | Install + 6 months lease + removal. |
| Estimated Total (12 months) | $840-$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 Texas
Contact providers directly for current pricing and service center locations in Texas. Compare at least 2-3 providers before choosing — prices and service quality vary.
Restricted License with IID
Texas allows an occupational license (also called an essential need license) with IID. The occupational license permits driving during specific hours set by the court for work, school, medical, and essential needs.
Tampering / Circumvention Penalties
Tampering with an IID in Texas is a Class B misdemeanor carrying up to 180 days in jail and a $2,000 fine. The IID period is extended and the occupational license may be revoked.
Early Removal
Texas may allow early removal at the court's discretion for offenders who demonstrate compliance. The judge must approve removal.
Texas-Specific Notes
Texas is the second-largest state and processes a high volume of DWI cases. While IID is not mandatory for all first-offense DWI, most Texas judges order IID as a condition of bond or probation, making it effectively required in practice even for standard first offenses. The occupational license with IID is the primary way to drive during a DWI suspension.
Frequently Asked Questions
Is an IID required for a first DWI in Texas?
What is an occupational license in Texas?
How much does an IID cost in Texas?
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