Kentucky Ignition Interlock — Requirements & Costs
When interlock may be required and practical steps.
When Kentucky requires an IID §189A.340; §189A.070
ignition interlock license is the sole license available during suspension for KRS 189A.010(1)(a), (b), (e), or (f) violations; a hardship license under KRS 189A.410 is an option only for (c) or (d) violations.
How long the IID must remain installed
device restriction lasts the KRS 189A.070(1) suspension period and, for a first offense, until 90 consecutive violation-free days are certified (120 consecutive days for subsequent offenses).
How the device works in practice
Violations and extensions
Common violations that can extend the IID period or trigger additional consequences:
- Failed startup tests (BAC above threshold)
- Failed rolling retests
- Missed calibration appointments
- Tampering with or attempting to circumvent the device
- Operating a vehicle without an IID when one is required
Costs
IID costs are borne by the offender and include:
- Installation fee
- Monthly monitoring/rental fee
- Removal fee
- Calibration fees (may be included in monthly rental or charged separately)
The IID as a path back to driving
While the IID is a restriction, it is also the mechanism that allows many offenders to resume driving sooner than they would under a full suspension. In Kentucky, Hardship license available after serving mandatory minimum of 30 days suspension on first offense, with IID installation required. Complying fully with IID requirements — no violations, on-time calibration — is the fastest path to full reinstatement.
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Frequently Asked Questions
General answers to common questions. Specific outcomes depend on your facts and timing.
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Related guides
- Minimum IID period: device restriction lasts the KRS 189A.070(1) suspension period and, for a first offense, until 90 consecutive violation-free days are certified (120 consecutive days for subsequent offenses)