South Dakota Car Accident Settlements: Slight vs. Gross

Every other state guide on this site eventually reduces to a fault percentage and a numeric cutoff. South Dakota doesn’t work that way at all — and the jury isn’t even allowed to tell you the percentage it might otherwise have in mind.

Quick answer: South Dakota uses a “slight-gross” comparative negligence rule under SDCL § 20-9-2 — a genuinely different structure from the percentage-based systems most states use. You can recover only if your own negligence was “slight” compared to the defendant’s, which must have been “gross” by comparison — a qualitative judgment, not a specific percentage cutoff. Once that threshold is cleared, damages are still reduced proportionally to your fault. Case law (Wood v. City of Crooks, 1997) held 30% fault is “more than slight” as a matter of law — a rough benchmark, not a bright-line rule. The jury’s determination is kept separate from any disclosed percentage finding. The filing deadline is 3 years; minimum insurance is 25/50/25.

Slight vs. Gross: A Qualitative Gate, Not a Percentage Cutoff

Under SDCL § 20-9-2, a plaintiff can recover damages only if their own contributory negligence was “slight” in comparison with the defendant’s negligence, which must have been “gross” by comparison. This is fundamentally different from how most states — including the 51%-bar and 50%-bar states — handle the same basic question. Rather than a jury assigning specific fault percentages and applying a numerical threshold, South Dakota asks the jury to make a qualitative comparison of the character and degree of both parties’ conduct.

A Rough Benchmark From Case Law, Not a Bright Line

There’s no officially stated percentage that separates “slight” from “not slight” — but one South Dakota Supreme Court case offers a real, if narrow, data point. In Wood v. City of Crooks (S.D. 1997), the court held that 30% contributory negligence is more than slight as a matter of law, barring recovery entirely. That doesn’t establish anything under 30% as automatically “slight” — it’s a single precedent, not a formal threshold — but it does suggest the practical ceiling for “slight” sits meaningfully below the 50% or 51% cutoffs used elsewhere.

The Jury Doesn’t State a Percentage

A genuinely unusual procedural feature: SDCL § 20-9-2 specifically provides that the slight-versus-gross determination is made without disclosing any percentage finding by special interrogatory. In most comparative negligence states, a jury’s special verdict form asks it to assign a specific fault percentage to each party, which is then applied directly to the damages calculation and any bar. South Dakota’s jury makes its threshold determination — did the plaintiff clear the slight-versus-gross gate — without expressing that judgment as a stated percentage.

Once You Clear the Gate, Proportional Reduction Still Applies

South Dakota’s system isn’t purely qualitative from start to finish. Once a plaintiff’s negligence is found to be “slight” compared to the defendant’s “gross” negligence, SDCL § 20-9-2 requires damages to be reduced in proportion to the plaintiff’s own contributory negligence — the same kind of proportional reduction other comparative negligence states apply. The distinctive part of South Dakota’s rule is the initial qualitative gate, not an absence of proportional reduction once a claimant is through it.

Illustrative South Dakota Settlement Ranges

These ranges assume the slight-gross threshold is cleared. Where the defense credibly argues the plaintiff’s own conduct was more than slight, the realistic settlement value can fall dramatically, independent of injury severity — the same dynamic other threshold-based states show, but argued here on qualitative rather than percentage terms.

South Dakota’s Minimum Insurance Requirements

South Dakota requires 25/50/25: $25,000 per person and $50,000 per accident for bodily injury liability, plus $25,000 for property damage.

Deadlines in South Dakota

Claim	Deadline
Personal injury lawsuit	3 years from the accident
Wrongful death	Generally 3 years from the date of death
Claims against a government entity	Shorter notice periods generally apply — confirm the specific timeline

Practical Checklist for a South Dakota Crash

1. Document the relative character of both drivers’ conduct, not just your own actions in isolation — this is a comparative, qualitative standard.
2. Gather dashcam footage and witness accounts that help characterize the other driver’s conduct as a clear, serious departure from reasonable care.
3. Don’t assume a 50% or 51% percentage threshold applies — South Dakota’s gate is qualitative, and framing your case around a percentage argument misunderstands the actual standard.
4. Understand that even clearing the threshold still means a proportional reduction for whatever fault you did bear.
5. Calculate your three-year deadline and diary it now.
6. Consult an attorney experienced specifically with South Dakota’s slight-gross standard, given how different the threshold argument is from the percentage-based approach used in most other states.

Sources & Further Reading

• SDCL § 20-9-2 — the slight-gross comparative negligence rule, the proportional reduction once the threshold is cleared, and the special-interrogatory disclosure limitation
• Wood v. City of Crooks, 559 N.W.2d 558 (S.D. 1997) — holding that 30% contributory negligence is more than slight as a matter of law
• See our guides to comparative negligence by state for how South Dakota’s qualitative rule compares to the percentage-based systems used elsewhere, and Tennessee car accident settlements for a percentage-based 50% bar as a point of contrast