Ignition Interlock Device (IID) in Delaware

Delaware uses the term "DUI" for impaired driving offenses. IID requirement: required for all dui offenses. First offense scope: 12 months. Confirm your actual notice and license status.

Last updated: 2026-09-07

Required for all DUI offenses

Quick Answer

Delaware requires IID for all DUI convictions, including first offenses. IID is mandatory for license reinstatement.

IID Duration by Offense

Offense	IID Duration
1st Offense	12 months
2nd Offense	18 months (with at least 1 year hard suspension first)
3rd Offense	24 months
4th+ Offense	30 months

BAC threshold: Any DUI conviction (no BAC threshold — all offenders)

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

Delaware allows a conditional license with IID installed for work, school, medical appointments, and court-ordered programs.

Tampering / Circumvention Penalties

Tampering with an IID in Delaware is a Class A misdemeanor carrying up to 1 year in jail. The IID requirement is extended by 6 months for each violation.

Early Removal

Delaware does not permit early removal of IID.

Delaware-Specific Notes

Delaware requires IID for all offenders but has a longer minimum duration (12 months) for first offenses compared to some other all-offender states.

Frequently Asked Questions

Is an IID required for a first DUI in Delaware?

Yes. Delaware mandates IID for 12 months for first-offense DUI.

How long do I need an IID in Delaware?

First offense: 12 months. Second offense: 18 months. Third offense: 24 months. Fourth or more: 30 months.

How much does an IID cost in Delaware?

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 Delaware DMV, your IID provider, or a qualified DUI attorney in Delaware.

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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.