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 duration: 6 months. Monthly cost: $60-$95.
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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)
IID Cost Breakdown in South Carolina
| Item | Cost | Notes |
|---|---|---|
| Installation | $70-$150 | One-time fee. Takes about 1 hour. |
| Monthly Lease + Monitoring | $60-$95/mo | Includes device lease and monitoring. |
| Calibration | $25-$65 | Every 60 days. |
| Removal | $50-$100 | One-time fee when IID period ends. |
| Estimated Total (6 months) | $480-$820 | Install + 6 months lease + removal. |
| Estimated Total (12 months) | $840-$1,390 | Install + 12 months lease + removal. |
One-time
Lease + monitoring
Every 60 days
One-time
All-in estimate
All-in estimate
Approved IID Providers in South Carolina
Contact providers directly for current pricing and service center locations in South Carolina. Compare at least 2-3 providers before choosing — prices and service quality vary.
Restricted License with IID
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?
How long do I need an IID in South Carolina?
How much does an IID cost in South Carolina?
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