Proximate Cause
The requirement that a defendant's conduct be a legally close enough cause of the harm to justify liability.
All legal theories →Causation in a negligence case has two parts. Cause-in-fact (often the 'but-for' test) asks whether the harm would have occurred without the defendant's conduct. Proximate cause -- better named 'legal cause' -- asks a different question: even if the defendant's act was a factual cause, is it fair to hold the defendant responsible for this particular harm?
Proximate cause is a policy-driven limit on liability. The law does not extend responsibility to every remote consequence of a careless act; it draws a line where the connection between conduct and injury becomes too attenuated, unforeseeable, or interrupted by other forces.
Foreseeability and scope of risk
The dominant modern test frames proximate cause in terms of foreseeability: a defendant is liable for harms that are a reasonably foreseeable result of the negligent conduct, and within the scope of the risk that made the conduct negligent in the first place. Harms of an unforeseeable type, or to an unforeseeable class of victims, may fall outside the scope of liability.
This is why the injury usually must be the sort of thing the defendant's duty of care was meant to prevent. A harm arriving through a bizarre, unforeseeable sequence may be a but-for cause yet still not a proximate one.
Intervening and superseding causes
An intervening cause is an event that occurs after the defendant's act and contributes to the harm. If that intervening cause is itself foreseeable, it usually does not cut off liability. If it is a superseding cause -- unforeseeable and sufficiently independent -- it breaks the causal chain and relieves the original defendant.
Courts often treat foreseeable intervening acts (including some negligent or even criminal acts, when foreseeable) as within the scope of the original risk, while genuinely extraordinary intervening events sever it.
How it is litigated
Plaintiffs frame the harm as a natural and probable consequence of the defendant's conduct, emphasizing the foreseeability of both the type of harm and the general manner of its occurrence. Expert testimony often connects the conduct to the injury through a coherent, foreseeable chain.
Defendants attack the chain: arguing the harm was an unforeseeable freak result, that it fell outside the risk making the conduct negligent, or that a superseding cause intervened. Because proximate cause is often a jury question, it is a frequent battleground on summary judgment and directed verdict.
Strategic and simulation use
Proximate cause is where many otherwise-strong negligence cases are won or lost, because it is more contestable than duty or breach. It is also where the defense concentrates fire when factual causation is hard to deny.
As a claim path, cause-in-fact and proximate cause are two sequential nodes on the way to liability. In Juricratic you can war-game a case by dialing the foreseeability of the harm and the strength of an alleged superseding cause, then watch the modeled probability-weighted paths to liability shift. These are user-set exploration dials, not forecasts of the verdict.
- What is the difference between actual cause and proximate cause?
- Actual cause (cause-in-fact) asks whether the harm would have happened but for the defendant's conduct. Proximate cause asks whether the connection is close enough, and the harm foreseeable enough, to fairly impose liability. A defendant can be an actual cause yet escape liability if the harm was not a proximate result.
- What is a superseding cause?
- A superseding cause is an intervening event, occurring after the defendant's conduct, that is unforeseeable and independent enough to break the causal chain and cut off liability. Foreseeable intervening causes usually do not sever liability. Whether an intervening act rises to superseding is often a fact question for the jury.
- Is proximate cause decided by the judge or the jury?
- Often it is a fact question for the jury, framed around foreseeability. But judges resolve it as a matter of law when reasonable minds could not differ -- for example, granting summary judgment where the harm was clearly unforeseeable. That makes proximate cause a recurring battleground on dispositive motions.
This page is an educational explainer, not legal advice, and creates no attorney–client relationship. Juricratic is a simulation engine: every probability-like figure is a dial you set, not a calibrated prediction. Verify every rule, deadline, and figure against the authorities and orders that govern your matter.
A theory is a claim path you can war-game.
Juricratic turns a legal theory into elements you can test — burdens as dials, outcomes as a distribution — so you see where the case is strong and where it breaks.
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