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

Official source: first offense (Kentucky)

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

Official source: repeat offenses (Kentucky)

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

Official source: how the program works (Kentucky)

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

Sources

  1. Ignition interlock

dui.help is an independent guide, not a law firm or a government agency, and doesn't give legal advice. For advice on your case, talk to a lawyer licensed in your state; your state bar can refer you, and if you can't afford a lawyer, ask the court about a public defender.