Getting hit by a driver who has no insurance—or not enough insurance—can turn an already stressful wreck into a financial mess.

South Carolina’s UM/UIM system is designed to protect you, but it has rules that can surprise people (especially regarding notice, settlement, and “stacking”).

This article explains how uninsured motorist (UM) and underinsured motorist (UIM) claims generally work in South Carolina, what to do after a crash, and common pitfalls to avoid.

Please keep in mind that this is general information and not legal advice. Every claim is unique and depends on the specific facts, policy details, and relevant law.

UM vs. UIM in South Carolina: The Basic Difference

Uninsured Motorist (UM)

UM applies when the at-fault driver has no liability insurance that applies to the crash—or when the at-fault driver can’t be identified in certain situations (like some hit-and-run cases).

South Carolina requires auto policies to include UM coverage at least at the state minimum liability limits. See [S.C. Code § 38-77-150].

South Carolina law also defines what constitutes an “uninsured motor vehicle,” including situations in which an insurer denies coverage or the owner/operator is unknown. See [S.C. Code § 38-77-30(14)] (definitions in Title 38, Chapter 77).

Underinsured Motorist (UIM)

UIM applies when the at-fault driver has insurance, but their liability limits are too low to fully cover your damages. South Carolina requires insurers to offer UIM (and additional UM) up to your liability limits, but you can reject it. See [S.C. Code § 38-77-160].

Why UM/UIM Matters: South Carolina’s Minimum Limits Are Often Low

South Carolina’s minimum liability limits are $25,000 per person / $50,000 per accident for bodily injury, and $25,000 for property damage. See [S.C. Code § 38-77-140(A)].

That means a serious crash can burn through the at-fault driver’s coverage quickly, putting your recovery pressure on UM/UIM (or on the at-fault driver personally—which often isn’t realistic).

Step-by-Step: What to Do After a Crash With an Uninsured or Underinsured Driver

1) Call law enforcement and document everything

A police report is really helpful in understanding how the accident occurred and who was involved, including witnesses. Remember to take clear photos of the vehicles, license plates, damages, injuries, road conditions, and any visible factors that might have contributed factors.

2) Notify your insurer promptly

Even if you’re not sure whether you’ll make a UM/UIM claim, notify your carrier and ask for the claim number. UM/UIM claims often require timely notice under your policy.

3) Get medical care and keep records

Your medical records link the collision to your injuries and help establish damages. Keep copies of discharge papers, referrals, prescriptions, and work restrictions.

4) Confirm the other driver’s coverage status

Sometimes, the other driver presents an insurance card that turns out to be canceled, excluded, or otherwise not valid. UM may come into play if there’s essentially no collectible liability coverage. (South Carolina Legislature)

Special Issue: Hit-and-Run (“John Doe”) UM Claims

If the at-fault driver is unknown, South Carolina has specific requirements that may limit recovery unless certain conditions are met—such as reporting, proof requirements (like an independent witness or recording), and other statutory conditions. See [S.C. Code § 38-77-170] and the related “John Doe” procedure in [S.C. Code § 38-77-180]. (South Carolina Legislature)

Because these cases can turn on technical details (and recent statutory changes), it’s smart to treat hit-and-run claims as time-sensitive from day one.

“Stacking” UM/UIM in South Carolina: When You May (and May Not) Combine Limits

“Stacking” generally means adding UM/UIM limits from multiple vehicles or policies to increase the total coverage available.

South Carolina’s stacking law often turns on whether you are considered a Class I insured (typically a named insured/spouse/resident relative with a vehicle involved), or a Class II insured (an occupant/other situation).

The South Carolina Supreme Court’s discussion in State Farm Mut. Auto. Ins. Co. v. Windham (2022) explains stacking principles, Class I vs. Class II concepts, and how courts analyze whether a person can stack UIM under § 38-77-160.

Key takeaway: Stacking is fact- and policy-specific. Even if allowed in concept, policy wording and the “vehicle involved” requirement can impact coverage.

A Common Surprise: Did You Reject UIM (or Was It Properly Offered)?

Because UIM is optional, many disputes center on whether the insurer made a meaningful offer of UIM coverage. If the offer wasn’t meaningful under South Carolina law, courts can reform the policy to include UIM up to the liability limits.

South Carolina’s top case is [State Farm Mut. Auto. Ins. Co. v. Wannamaker], which outlines a helpful four-part standard for making a meaningful offer. This includes providing reasonably timed notice, clearly defining limits, offering an understandable explanation, and disclosing any additional premiums.

Cases addressing meaningful-offer disputes include [Bower v. National General Ins. Co.] and other appellate decisions applying these principles.

Settlement and UIM: What South Carolina Law Says About “Consent”

People often hear they need the UIM carrier’s “permission” before settling with the at-fault driver. South Carolina law is unusually direct here: “No underinsured motorist policy may contain a clause requiring the insurer’s consent to settlement with the at-fault party.” See [S.C. Code § 38-77-160].

That said, UIM claims still have procedural steps (including service/notice requirements in litigation contexts), and mishandling settlement timing can create avoidable disputes.

For example, South Carolina law also addresses serving pleadings on the UIM carrier and the carrier’s right to appear and defend in the underinsured motorist’s name. (South Carolina Legislature)

Deadlines: Don’t Sleep on the Statute of Limitations

Many South Carolina injury claims are subject to a three-year limitations period, and South Carolina applies a “discovery” concept in certain contexts. See [S.C. Code § 15-3-535].

The right deadline for your situation can depend on the claim type, the parties involved, and other factors—so it’s worth getting a limitations date on the calendar early.

Practical Tips to Strengthen a UM/UIM Claim

• Get the declarations page for every potentially applicable policy (yours, household family members, employer policies if you were working, etc.).
• Don’t assume “full coverage” includes UIM. UIM is often rejected unless the insured chooses it. (South Carolina Legislature)
• Track all out-of-pocket costs (deductibles, prescriptions, mileage, missed work).
• Be careful with recorded statements—answer truthfully, but consider getting guidance if you’re unsure about fault disputes or injury history.
• Keep a symptom journal if injuries evolve over time (common with back/neck injuries and concussions).

Talk With a South Carolina Car Accident Lawyer About UM/UIM Options

UM/UIM claims can be more complicated than people expect because you’re often dealing with your own insurer, policy language, and technical requirements—especially in hit-and-run cases, stacking situations, or disputes about whether UIM was properly offered.

If you were hit by an uninsured or underinsured driver in South Carolina, consider scheduling a consultation with the Chandler Law Firm to review your coverage, deadlines, and next steps.

A careful review early on can help you avoid preventable mistakes and understand what compensation may be available under your policy.