In courtroom proceedings, the preponderance standard is communicated to the jury during jury instructions in civil trials. The judge will typically instruct jurors to find for the plaintiff if they believe it is more likely than not that the plaintiff's version of events is true. Attorneys reference this standard during opening statements and closing arguments to frame the evidentiary threshold for the jury. During closing, plaintiff's counsel will often use analogies such as a balanced scale that tips even slightly in their favor, while defense counsel will argue that the plaintiff has failed to tip that scale.
Attorney: "Ladies and gentlemen, you do not need to be absolutely certain. You need only find that it is more likely than not that the defendant's negligence caused my client's injuries. If the evidence tips the scales even slightly in our favor, you must find for the plaintiff."
Judge: "Members of the jury, the plaintiff bears the burden of proof by a preponderance of the evidence. This means you must be persuaded that the plaintiff's claims are more probably true than not true."
Attorney: "Your Honor, the defense moves for judgment as a matter of law. The plaintiff has failed to establish by a preponderance of the evidence that any breach of duty occurred."
Students frequently confuse preponderance of the evidence with clear and convincing evidence, or mistakenly believe that preponderance requires a substantial margin of proof. In reality, even a 50.1% likelihood satisfies this standard — the evidence need only be slightly more convincing than the opposing evidence.
Herman & MacLean v. Huddleston, 459 U.S. 375 (1983)
Confirmed that preponderance of the evidence is the standard for civil securities fraud claims under Section 10(b), rejecting the argument that clear and convincing evidence should be required.
Grogan v. Garner, 498 U.S. 279 (1991)
Held that the preponderance standard applies to exceptions to discharge in bankruptcy, providing the default standard for civil proceedings unless Congress specifies otherwise.
| Preponderance of Evidence | Beyond a Reasonable Doubt |
|---|---|
| More likely than not (>50%) | No reasonable doubt in the mind of a reasonable person |
| Used in most civil cases | Used in criminal prosecutions |
| Lower standard — easier to meet | Highest standard — most difficult to meet |
| Balances interests of both parties equally | Protects the liberty interest of the accused |
| Jury need only find slight probability advantage | Jury must have firm conviction of guilt |
What does preponderance of the evidence mean?
Preponderance of the evidence means that a claim is more likely true than not — often described as "more than 50%" or "tipping the scales." It is the standard of proof in most civil cases. The plaintiff must show that their version of events is more probable than the defendant's. It is the lowest standard of proof used in American courts.
When is the preponderance standard used?
The preponderance standard is used in most civil litigation, including personal injury, contract disputes, property cases, and employment discrimination. It also applies in certain quasi-criminal proceedings like probation revocation hearings and immigration removal proceedings. Some affirmative defenses in criminal cases also use this standard.
How do you prove preponderance of the evidence?
To prove a case by preponderance of the evidence, you must present sufficient evidence that the factfinder believes your version of events is more likely true than not. This can be achieved through witness testimony, documents, physical evidence, and expert opinions. The quality and credibility of evidence matters more than the quantity.
The burden of proof refers to a party's obligation to prove the facts necessary to support their cla...
Jury instructions (also called jury charges) are the legal directions given by the judge to the jury...
Closing argument (or summation) is each party's final presentation to the jury, delivered after all ...
The verdict is the formal decision or finding made by a jury (or judge in a bench trial) on the fact...
