Ignition Interlock Device (IID) in South Carolina

South Carolina uses the term "DUI" for impaired driving offenses. IID requirement: required for all dui offenses. First offense scope: 6 months. Confirm your actual notice and license status.

Last updated: 2026-09-07

Required for all DUI offenses

Quick Answer

South Carolina requires IID for all DUI convictions, including first offenses, as a condition of obtaining a provisional license during the suspension period.

IID Duration by Offense

Offense	IID Duration
1st Offense	6 months
2nd Offense	2 years
3rd Offense	3 years
4th+ Offense	Permanent (lifetime)

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

South Carolina issues a provisional license with IID for essential driving.

Tampering / Circumvention Penalties

Tampering with an IID in South Carolina is a misdemeanor carrying fines and up to 1 year in jail.

Early Removal

South Carolina does not allow early removal. Fourth-offense offenders face a lifetime IID requirement.

South Carolina-Specific Notes

South Carolina has a lifetime IID requirement for fourth-offense DUI. The state requires all offenders to install IID for driving privileges during suspension.

Frequently Asked Questions

Is an IID required for a first DUI in South Carolina?

Yes. South Carolina requires IID for all DUI convictions. First offense: 6 months.

How long do I need an IID in South Carolina?

First offense: 6 months. Second: 2 years. Third: 3 years. Fourth or more: permanent (lifetime).

How much does an IID cost in South Carolina?

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

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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.