Proximate cause is the legal idea that connects a careless act to the harm it produced. It asks: was this loss a natural, foreseeable result of what the person did, without anything unrelated breaking the chain? For a negligence claim to succeed, the injured party must show the defendant's conduct was the proximate cause of the injury—not just one of a hundred distant factors.

Why it matters

Causation is one of the four elements of negligence, and proximate cause is the part insurers and courts argue about most. A policy responds when the insured's negligence proximately caused the loss. If something unforeseeable interrupts the chain of events, the original act may no longer be considered the legal cause—and coverage or liability can change.

A simple example

A driver runs a stop sign and hits another car. The crash directly causes the other driver's broken leg. Running the stop sign is the proximate cause of that injury—it's a direct, foreseeable result.

Now twist it: weeks later, that injured driver trips on crutches and breaks a different bone. Was the stop-sign runner the proximate cause of that second injury? Courts would weigh foreseeability and whether the chain of causation held—this is exactly the kind of line proximate cause draws.

Don't confuse it with…

Actual cause (also called "cause in fact") simply asks whether the harm would have happened but for the act. Proximate cause goes further, adding the requirement of foreseeability and an unbroken chain. An act can be the actual cause of something yet be too remote to be the proximate cause.

On the exam

Tie proximate cause back to the causation element of negligence. Remember the keyword foreseeable and the phrase unbroken chain of events. If an exam scenario inserts a freak, unrelated event between the act and the harm, that's a hint the chain may be broken and proximate cause defeated.