A Rule Unlike Most Other States
Most states let an injured driver recover damages as long as they were less than fifty percent at fault, reducing the payout by whatever percentage applies. South Dakota does something different. Under the state’s slight and gross comparative negligence framework, a driver who contributed to a crash can only recover if their own negligence was slight compared to the other driver’s. That single word, slight, ends up deciding a surprising number of cases before damages are ever calculated.
Where the Rule Comes From
South Dakota’s approach traces back to a statute that has stayed largely unchanged for decades. It does not define a specific percentage threshold the way many modified comparative fault states do. Instead, a jury weighs the two drivers’ conduct against each other and decides whether the injured party’s contribution was slight in relation to the other driver’s negligence. This flexibility can work in an injured driver’s favor in some cases and against that same driver in others, depending heavily on how the comparison gets framed at trial or in settlement talks.
- No fixed percentage cutoff, unlike most comparative fault states
- Fault is compared, not simply totaled
- A jury or adjuster decides what counts as slight
- Even minor contributing factors can be argued as more than slight
How Insurance Adjusters Use This Rule
Because slight has no fixed definition, insurance adjusters in Pennington County have room to argue that a claimant’s fault was more significant than it actually was. A driver who was going five miles over the limit, glanced at a phone briefly, or made a legal but imperfect lane change can find that conduct characterized as more than slight if it helps reduce a payout. This is one of the more consequential features of South Dakota law for anyone filing a claim after a crash.
What Evidence Actually Moves the Needle
Because the comparison is subjective, evidence carries even more weight than in states with a strict percentage system. Dashcam footage, witness statements, and a clear accident report all help establish which driver’s conduct was the dominant cause of the crash. A Pennington County car accident lawyer building a claim typically prioritizes gathering this kind of evidence early, before memories fade and physical evidence at the scene disappears.
Common Situations Where This Comes Up
Intersection crashes are a frequent source of slight versus gross disputes, since both drivers often had some opportunity to avoid the collision. A driver who had the right of way but was going slightly over the speed limit, for example, may still recover if a jury finds the other driver’s failure to yield was the dominant cause. Rear end collisions tend to be more straightforward, since the trailing driver is usually presumed to bear most of the responsibility.
Weather related crashes add another layer of complexity to this analysis. A driver handling an unexpected patch of ice may share some fault for not adjusting speed sooner, but if the other driver was traveling well above a safe speed for the conditions, that conduct likely outweighs any minor caution the first driver could have exercised. These comparisons rarely have an obvious answer, which is exactly why building a strong evidentiary record matters so much.
Why Filing Deadlines Still Matter
Regardless of how fault gets divided, South Dakota law still requires a personal injury claim to be filed within three years of the crash, per S.D. Codified Laws § 15-2-14. Waiting to sort out fault questions before starting the claims process can eat into that window unnecessarily, particularly in cases where liability is genuinely disputed and takes time to investigate properly.
Building a Strong Position From the Start
A crash on Interstate 90 or one of the roads feeding into the Black Hills carries the same slight and gross analysis regardless of where in Pennington County it happens. Anyone weighing how to approach a disputed claim benefits from talking with a Pennington County car accident lawyer before an insurer has the chance to frame the fault narrative first.
Getting the Right Evidence in Place Early
Loos, Sabers & Smith, LLP works to gather the evidence that shapes how that comparison plays out from the earliest stage of a claim, rather than waiting until an insurer has already committed to its version of events.