Burden of proof

What is the burden of proof?

The burden of proof determines who must convince the jury and how convinced the jury must be. In civil injury cases it sits with the plaintiff on every element of the claim.

This is why a case can fail without the defense proving anything. If the evidence leaves the jury genuinely unable to decide, the party carrying the burden loses.

It is a practical allocation rather than a comment on credibility. Someone has to lose when the evidence is genuinely balanced, and the law places that risk on the party seeking to change the status quo.

How much proof is required?

The civil standard is preponderance of the evidence, meaning more likely true than not. Jurors are often told to think of it as tipping a scale slightly.

It is far below the criminal standard of beyond a reasonable doubt. That gap explains how someone acquitted of a crime can still lose a civil case arising from the same conduct.

What must a plaintiff prove?

The burden covers every element, and failing on any one defeats the claim.

Each element carries its own burden, so a case can be strong on some and fail on another. A clearly negligent defendant still owes nothing if the injury cannot be tied to their conduct.

• That a duty of care existed
• That the defendant breached it
• That the breach caused the injury
• That real damages resulted
• The amount of those damages, including future losses

Does the burden ever shift?

In limited circumstances. Res ipsa loquitur can permit an inference of negligence where an accident of that kind does not ordinarily happen without it, which effectively requires the defendant to respond.

New Jersey's mode of operation rule works similarly in certain retail fall cases by relieving the customer of proving notice. Defendants also carry the burden on their own affirmative defenses.

Understanding this reframes what a defense actually needs to accomplish. The defense does not have to prove an alternative explanation, only create enough doubt that the scale fails to tip.

Common questions

Does the defendant have to prove they were not negligent?

Generally no. The plaintiff carries the burden throughout, though a defendant asserting an affirmative defense must prove that defense.

What happens if the jury is evenly split on the evidence?

The party carrying the burden loses, since more likely than not has not been established. A true tie favors the defense.

Is the burden higher for punitive damages?

Yes. Punitive damages require clear and convincing evidence, an intermediate standard above preponderance.

Does the burden change once I present my evidence?

Not formally. The burden of proof stays with the plaintiff throughout. What shifts in practice is the burden of producing evidence, since a defendant facing a strong case must respond rather than rely on silence. Affirmative defenses are the exception, since the defendant must prove those. Comparative negligence and failure to mitigate both fall into that category, which is why they are pleaded specifically in the answer.