Kentucky · DUI · Checked October 2026
Ignition Interlock Rules in Kentucky
Ignition Interlock Rules in Kentucky: What Are the Rules?
When Kentucky requires an ignition interlock after a DUI.
- First offense
- Not mandatory; an ignition interlock license is the only way to drive during an alcohol-based DUI suspension and can shorten the suspension to 4 months
- Repeat offenses
- Same; with an interlock license the suspension can be shortened to 12 months (second), 18 months (third) or 30 months (fourth or later); the court must require an interlock license application for a pretrial suspension of a repeat offender
First Offense in Kentucky
not mandatory; an ignition interlock license is the only way to drive during an alcohol-based DUI suspension and can shorten the suspension to 4 months
Repeat Offenses in Kentucky
same; with an interlock license the suspension can be shortened to 12 months (second), 18 months (third) or 30 months (fourth or later); the court must require an interlock license application for a pretrial suspension of a repeat offender
How the Program Works in Kentucky
apply to the Transportation Cabinet any time, even before conviction; time on an interlock license counts day for day toward the suspension; release requires 90 (first) or 120 (later) consecutive violation-free days; device provider fees are capped (installation up to $100 or $130, monthly up to $100); an employer-vehicle exemption is available
More on DUI Law in Kentucky
See the full overview of DUI laws in Kentucky and read about how ignition interlock programs work.
This page summarizes Kentucky law from official sources, checked October 2026. It isn't legal advice; a lawyer licensed in Kentucky can advise on your case.
Frequently Asked Questions
Is an Ignition Interlock Required for a First DUI in Kentucky?
not mandatory; an ignition interlock license is the only way to drive during an alcohol-based DUI suspension and can shorten the suspension to 4 months
Is an Interlock Required for Repeat Offenses?
same; with an interlock license the suspension can be shortened to 12 months (second), 18 months (third) or 30 months (fourth or later); the court must require an interlock license application for a pretrial suspension of a repeat offender