Second DUI in South Carolina: How the Penalties Escalate

KEY TAKEAWAYS:

A second DUI conviction in South Carolina brings a mandatory minimum jail term, a fine starting at $2,100, and a two-year ignition interlock requirement once the license suspension ends. Only convictions within the past 10 years count toward a second offense, and that lookback period includes out-of-state DUI convictions as well as South Carolina ones. Because the consequences increase sharply between a first and second charge, having a Charleston County DUI lawyer defend you is crucial.

A first DUI in South Carolina is frightening. A second one changes the math entirely: fine minimums jump, jail time becomes mandatory, and the path back to a full license runs through a two-year ignition interlock program instead of a short suspension. That gap can mean the difference between an inconvenience and a disruption that lasts years.

At The Farmer Law Firm, Charleston County attorney Merritt Farmer has spent years defending South Carolina drivers against repeat DUI charges, including contested field sobriety and breath test cases. Here is how South Carolina calculates the penalties for a second DUI conviction and other long-term consequences you face. 

What Counts as a Second DUI Offense in South Carolina?

South Carolina generally looks back 10 years when determining whether a DUI is a second offense. A qualifying prior violation can count if it occurred within the 10 years immediately preceding the new offense. 

It can include a prior South Carolina DUI or driving with an unlawful alcohol concentration conviction, as well as a qualifying conviction under another state’s drunk or drugged driving law. Because the lookback runs a full decade, a DUI from years ago can still turn a new charge into a second offense with substantially higher penalties.

What Are the Penalties for a Second DUI?

A second DUI conviction carries a mandatory jail sentence and significantly higher fines than a first offense, which can be as low as $400. The exact range depends on the driver's blood alcohol content, or BAC, at testing.

• BAC not tested, or below 0.10 percent. You face a fine of $2,100 to $5,100 and five days to one year in jail
• BAC of 0.10 percent to 0.159 percent. The penalties increase to $2,500 to $5,500 in fines and 30 days to two years in jail
• BAC of 0.16 percent or higher. Your sentence may include fines of $3,500 to $6,500 and 90 days to three years in jail

Under S.C. Code Section 56-5-2930, the fine cannot be suspended below $1,100. Also, for a second offense, serving the mandatory minimum jail term is not optional, the way it can sometimes be for a first-time conviction. Additional court assessments and surcharges can significantly increase the financial cost of a conviction.

What Happens to Your Driver's License After a Second DUI Conviction?

A second DUI conviction triggers an automatic license suspension. The suspension ends only once the driver enrolls in the state's Ignition Interlock Device Program.

For a second offense, the interlock must be installed for 2 years. Refusing the breath or blood test at arrest also triggers a separate suspension under the state's implied consent law, up to nine months, regardless of the case's outcome.

Restoring full driving privileges after a second DUI conviction generally requires:

• Enrolling in the Ignition Interlock Device Program for two years
• Completing the Alcohol and Drug Safety Action Program, known as ADSAP
• Paying the costs of the interlock device and the required safety assessment
• Avoiding any new violation that would restart or extend the restriction

What Other Consequences Come With a Second DUI in South Carolina?

Fines, jail time, and license consequences are only part of what a second DUI conviction costs. A few collateral consequences tend to surprise people who assumed the case would end once the sentence was served.

• Criminal record. A DUI conviction results in a permanent criminal record and cannot be expunged.
• Insurance increases. Auto insurance premiums typically rise sharply for years, and some carriers decline to renew coverage.
• Employment and other consequences. You may experience difficulty obtaining employment, housing, a professional license, and a security clearance.
• Civil liability. If the second offense involved a crash, these criminal penalties are separate from any civil claim the other driver may bring for their own injuries and losses. 
• Felony charges. If the crash caused serious injury or death, South Carolina prosecutes the case as felony DUI under a separate statute, with prison exposure measured in years rather than months.

How Can a Charleston County DUI Lawyer Defend You If You’re Charged With a Second DUI?

A second DUI charge raises the stakes, but an arrest does not automatically mean a conviction. The prosecution still has to prove every element of the charge. 

Our Charleston County DUI lawyer can examine what happened before, during, and after your arrest and identify issues that may affect the case. Depending on the circumstances, attorney Merritt Farmer may raise defenses based on:

• Reviewing the traffic stop. Police must have a lawful basis for stopping your vehicle. Our lawyer can examine dashcam footage, police reports, and other evidence to determine whether the stop complied with the law and challenge it if it was unlawful.
• Examining field sobriety testing. Roadside tests can be affected by how they are administered, as well as by physical conditions, road surfaces, weather, footwear, and other factors. Merritt Farmer is certified as an instructor in the NHTSA DUI Detection and Standardized Field Sobriety Testing course, the same training officers receive at the academy. He will review the officer's instructions and observations carefully to identify errors in the administration of the field sobriety test. 
• Challenging breath or chemical test evidence. South Carolina has procedures governing DUI testing. Our lawyer can investigate whether testing requirements were followed and whether there are grounds to dispute the reliability or admissibility of the results.
• Identifying violations of your constitutional rights. Our lawyer will also examine whether the police had a lawful basis for the traffic stop, arrest, search, or seizure, and whether your constitutional rights were violated during the investigation. If evidence was obtained unlawfully, Merritt can determine whether there are grounds to seek suppression of it. 
• Determining whether the charge qualifies as a second offense. Because a prior qualifying offense can dramatically increase the potential penalties, our lawyer can review the record and determine whether the alleged prior offense falls within South Carolina's applicable lookback period.
• Protecting your driving privileges. A DUI arrest can create license issues separate from the criminal charge. Our lawyer can explain applicable deadlines and options for addressing an administrative suspension and ignition interlock requirements.
• Building a defense based on the evidence. From body camera footage and witness statements to test records and arrest procedures, our lawyer can identify weaknesses in the prosecution's case and determine which defense strategies best fit the facts.

With mandatory jail time and increased fines possible after a second DUI conviction, waiting to address the charge can leave important opportunities unexplored. Our Charleston County DUI lawyer can help you understand what you're facing, protect your rights, and build a defense based on the specific facts of your case.