South Carolina DUI laws set the standard blood alcohol concentration limit at 0.08% for drivers age 21 and older. Commercial drivers face a lower limit of 0.04%, and drivers under 21 face a zero tolerance limit of 0.02%. A first offense DUI conviction can bring a fine of up to $400, which totals $992 with assessments and surcharges, along with 48 hours to 30 days in jail. This guide covers penalties by offense number, felony DUI, implied consent, and ignition interlock rules under the South Carolina Code of Laws and the South Carolina Department of Public Safety.
Key Terms Defined
South Carolina law uses the phrase materially and appreciably impaired to describe a driver whose ability to safely operate a vehicle was noticeably affected by alcohol or drugs. This standard applies even when no blood alcohol concentration number is available. Driving with an unlawful alcohol concentration, often shortened to DUAC, is a separate offense based purely on a measured blood alcohol concentration of 0.08% or higher. Implied consent means that anyone who drives in South Carolina has already agreed by law to submit to a breath, blood, or urine test if arrested for suspected impaired driving.
An ignition interlock device is a breath testing unit installed in a vehicle that prevents the engine from starting if it detects alcohol on the driver’s breath. Great bodily injury is a legal term describing harm serious enough to create a substantial risk of death or to cause permanent disfigurement or loss of a bodily function. This term determines when a DUI charge becomes a felony. Administrative license suspension refers to a license suspension that happens automatically after arrest, separate from whatever happens in the criminal case itself.
What the Law Says
South Carolina Code Section 56-5-2930 makes it unlawful to drive a motor vehicle while under the influence of alcohol, drugs, or a combination of both to the extent that a driver’s mental and physical faculties are materially and appreciably impaired. This offense does not require a specific blood alcohol concentration number. Officers and prosecutors can rely on driving behavior, field sobriety test results, and other evidence of impairment to support a charge under this section, even when a chemical test result is unavailable or contested.
A separate offense exists under Code Section 56-5-2933 for driving with an unlawful alcohol concentration, commonly called DUAC. This offense is sometimes described as illegal per se, meaning a blood alcohol concentration of 0.08% or higher is enough on its own to support a conviction regardless of how impaired the driver appeared during the stop. A person cannot be prosecuted under both Code Section 56-5-2930 and Code Section 56-5-2933 for the exact same driving incident, though either charge carries the same penalty structure under South Carolina law.
The standard blood alcohol concentration limit in South Carolina is 0.08% for drivers age 21 and older operating a noncommercial vehicle. Commercial vehicle drivers face a stricter limit of 0.04% because of the greater risk involved in operating large vehicles. Drivers under the age of 21 are subject to a zero tolerance limit of 0.02%, meaning even a small measurable amount of alcohol can result in license consequences. These tiered limits according to the South Carolina Department of Public Safety impaired driving laws overview reflect the state’s approach to graduated risk based on vehicle type and driver age. For more details, visit the South Carolina Department of Public Safety impaired driving laws overview.
Who It Applies To
South Carolina DUI laws apply to any person operating a motor vehicle within the state, regardless of residency or the type of license held. The law applies whether the vehicle is being driven on a public highway or in certain other locations covered under the traffic code. Both South Carolina residents and out of state visitors are subject to the same blood alcohol concentration limits and penalty structure once they choose to drive on South Carolina roads.
Commercial drivers face additional scrutiny under the lower 0.04% blood alcohol concentration limit because a conviction can also affect their commercial driving privileges beyond the criminal penalties described in this guide. Drivers under 21 face the zero tolerance limit even though the general adult limit is higher, reflecting a stricter legal standard tied to the state’s minimum drinking age. Anyone who obtains a South Carolina driver’s license is separately bound by the implied consent requirements described later in this guide.
Penalties or Consequences
South Carolina penalties for DUI and DUAC convictions escalate with each additional offense. For a first offense, a person convicted faces a fine of up to $400, which totals $992 once assessments and surcharges are applied, along with imprisonment ranging from 48 hours to 30 days. A first offense conviction also results in a six month suspension of the person’s driver’s license. These figures come directly from the South Carolina Department of Public Safety and reflect the full cost beyond the base statutory fine alone.
A second offense carries a fine ranging from $2,100 to $5,100, which totals $10,744.50 with assessments and surcharges. Imprisonment for a second offense ranges from five days to one year, and the driver’s license is suspended for one year. These penalties reflect a significant increase from the first offense structure and are intended to deter repeat impaired driving within the state’s counting period for prior convictions.
A third offense brings a fine of $3,800 to $6,300, which totals $13,234.50 with assessments and surcharges, along with imprisonment from 60 days to three years. The license suspension for a third offense is two years, extending to four years if the third offense occurs within five years of the first offense. If a third or subsequent offense occurs within ten years of the first offense, the vehicle used in the offense must be confiscated if the offender owns it or is a resident of the vehicle owner’s household under Code Section 56-5-6240.
A fourth or subsequent offense carries imprisonment ranging from one to five years and results in permanent revocation of the offender’s driver’s license. This penalty structure applies specifically to repeat convictions under Code Section 56-5-2930 or Code Section 56-5-2933 that do not involve great bodily injury or death. It is a common misconception that any fourth offense automatically becomes a felony DUI, but felony classification in South Carolina depends on injury or death rather than the number of prior convictions alone.
Felony driving under the influence applies only when a person under the influence causes great bodily injury or death while committing an act forbidden by law or neglecting a duty imposed by law while driving. Under Code Section 56-5-2945, a conviction involving great bodily injury carries a mandatory fine of $5,100 to $10,100, which totals $21,119.50 with assessments and surcharges, along with imprisonment from 30 days to 15 years. A conviction involving death carries a mandatory fine of $10,100 to $25,100, totaling $52,244.50 with assessments and surcharges, and imprisonment from one to 25 years.
Implied Consent and Chemical Testing
South Carolina Code Section 56-5-2950 establishes that any person who drives a motor vehicle in South Carolina is considered to have given consent to chemical testing of breath, blood, or urine if arrested for an offense connected to driving under the influence. This means a driver does not need to sign anything or verbally agree at the time of arrest because the consent is already established by the act of driving in the state under the terms of the South Carolina Code of Laws Title 56, Chapter 5. Testing is meant to determine whether alcohol or drugs were present at the time of driving.
If a driver refuses to submit to blood alcohol concentration testing after a lawful arrest, South Carolina law imposes an automatic license suspension separate from any criminal case outcome. According to the South Carolina Department of Public Safety, this refusal results in a 90 day suspension of driving privileges for a driver age 21 or older, or a 180 day suspension if the driver has a prior alcohol related conviction or suspension within the preceding ten years. This differs from older sources describing a tiered six, nine, or twelve month schedule, so readers should rely on the current SCDPS figures rather than outdated summaries.
Refusal to submit to testing does not eliminate potential consequences of a DUI charge itself, since prosecutors may still pursue a case based on other evidence such as officer observations and field sobriety test results. Administrative license suspension under Code Section 56-5-2951 begins automatically after refusal or after a qualifying test result, regardless of whether the underlying criminal charge results in a conviction. This administrative process operates independently from the criminal court process described elsewhere in this guide.
Ignition Interlock Device Requirements
South Carolina requires ignition interlock devices for all DUI and DUAC convictions under the All Offender Law, which took effect on May 19, 2024. Before this law, ignition interlock participation was only mandatory for certain repeat offenders or first offenders with a high blood alcohol concentration reading. The change was confirmed through the South Carolina Department of Public Safety All Offender Law media advisory, which describes the requirement applying regardless of the convicted driver’s blood alcohol concentration level.
Under Code Section 56-5-2941, the Ignition Interlock Device Program requires a breath testing unit to be installed in any vehicle the convicted person drives for a set period tied to their offense history. The South Carolina Department of Probation, Parole and Pardon Services DUI law announcement confirms that this agency oversees participation in the program and that the legislation was signed into law by Governor Henry McMaster. A driver who fails to comply with ignition interlock requirements can face additional license consequences beyond the underlying DUI penalty.
Exceptions and Limitations
South Carolina law includes a mandatory video recording requirement under Code Section 56-5-2953 for a person’s conduct at the incident site and the breath testing site in connection with a DUI or DUAC charge. This recording requirement is intended to document field sobriety testing and the administration of breath tests. Failure to substantially comply with this requirement can affect how evidence is treated during a case, though it does not automatically dismiss every related charge on its own.
The distinction between great bodily injury and lesser injuries also limits when felony DUI charges apply under Code Section 56-5-2945. An injury must create a substantial risk of death or cause serious permanent disfigurement or protracted loss of a bodily function to qualify as great bodily injury under current law. Injuries that do not meet this threshold, such as many broken bones, generally remain outside the felony DUI category as the law is currently written, even though they may still result in other criminal charges.
Common Misconceptions
A common misconception is that a DUI charge in South Carolina always depends on a specific blood alcohol concentration number. In reality, Code Section 56-5-2930 allows a DUI charge based on materially and appreciably impaired faculties, independent of any chemical test result. This means field sobriety performance, driving pattern, and officer observations can support a charge even without a breath or blood test result being available at all.
Another misconception is that refusing a breath test avoids all legal consequences of a traffic stop. While refusal prevents the state from obtaining a direct chemical test result, it triggers an automatic administrative license suspension under Code Section 56-5-2951 and can still be used as evidence in a related criminal case. Refusal does not function as a way to avoid legal exposure, since the underlying DUI charge based on impairment can still proceed using other evidence.
It is also a misconception that felony DUI in South Carolina applies automatically to a fourth or later offense. Felony DUI under Code Section 56-5-2945 depends specifically on whether the impaired driving caused great bodily injury or death, not on the number of prior convictions. A repeat offender with no injury involved remains subject to the escalating misdemeanor penalty structure described earlier rather than automatic felony classification.
Recent and Pending Law Changes
South Carolina lawmakers have made strengthening the state’s DUI laws a stated priority for the 2026 legislative session. Proposed legislation would remove certain loopholes connected to the mandatory video recording requirement and would create enhanced penalties for DUI related wrecks causing moderate bodily injury, such as a bone fracture or dislocation, which currently falls short of the great bodily injury threshold required for felony DUI charges. As of the most recent available reporting, this legislation had advanced through committee but had not been enacted into final law.
Because this legislation remains pending rather than settled law, readers should treat any description of expanded felony thresholds as proposed rather than currently enforceable. Laws and enforcement may change, so readers should check official state sources for the latest rules rather than relying solely on this guide or on outdated third party summaries. The confirmed All Offender Law requiring ignition interlock devices for all convictions, described earlier, remains in force regardless of any pending 2026 legislative changes. For general information about how Lawwalls presents legal topics and the limits of this content, see the Disclaimer page.
Disclaimer
This article is for general informational purposes only. It is not legal advice. Lawwalls publishes informational content only and does not provide legal services or legal advice.
For legal advice about your specific situation contact a licensed attorney in your state. Laws change and vary by jurisdiction. Verify current rules with official government sources or a qualified lawyer.