Ignition Interlock Device (IID) in Kentucky

Kentucky uses the term "DUI" for impaired driving offenses. IID requirement: required for high bac or repeat offenses. First offense scope: 6 months (only if BAC 0.15%+; not required for standard first offense). Confirm your actual notice and license status.

Last updated: 2026-09-07

Required for high BAC or repeat offenses

Quick Answer

Kentucky requires IID for DUI convictions with BAC of 0.15% or higher on first offense. IID is mandatory for all second and subsequent DUI offenses regardless of BAC level.

IID Duration by Offense

Offense	IID Duration
1st Offense	6 months (only if BAC 0.15%+; not required for standard first offense)
2nd Offense	12 months
3rd Offense	30 months
4th+ Offense	60 months (5 years)

BAC threshold: 0.15% BAC for first offense; all repeat offenses

Confirm the device, provider and written quote

Check the responsible authority’s current approval information for the particular device and installer. Request the billing unit, included services, actual paid visit schedule, taxes, fees and removal terms in writing. Confirm financial assistance separately.

Add your own quoted charges in the IID worksheet. Unknown charges stay unknown; no local price or appointment count is assumed.

Restricted License with IID

Available

Kentucky allows a hardship license with IID for work and essential driving.

Tampering / Circumvention Penalties

Tampering with an IID in Kentucky is a Class A misdemeanor. Penalties include up to 12 months in jail and fines. The IID requirement period is extended.

Early Removal

Kentucky does not allow early removal.

Kentucky-Specific Notes

Kentucky has long IID requirements for repeat offenders — up to 5 years for a fourth offense. The state's aggravated DUI threshold (0.15%) triggers IID for first offenders.

Frequently Asked Questions

Is an IID required for a first DUI in Kentucky?

Only if your BAC was 0.15% or higher. Standard first-offense DUI does not require IID.

How long do I need an IID in Kentucky?

First offense (if applicable): 6 months. Second: 12 months. Third: 30 months. Fourth or more: 60 months (5 years).

How much does an IID cost in Kentucky?

Get a written quote for your vehicle and program. Confirm the billing period, included service, separately paid visits, taxes, state/program fees and removal charges. Verify any financial assistance before assuming a discount. A generic state price range is not your quote.

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Disclaimer: This is informational only, not legal advice. IID requirements, costs, and approved providers change frequently. Verify current requirements with the Kentucky DMV, your IID provider, or a qualified DUI attorney in Kentucky.

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Sources

NHTSA: interlock device and program background. This national reference does not verify every state rule above. Confirm the applicable law and current instructions with the authority named on your order or licensing notice.