Materiality is the idea that a fact matters under the law governing the dispute.
In plain language, a material fact is important enough to affect a claim, defense, element, liability issue, remedy, or procedural decision. A fact can be interesting without being material.
Why it matters
Materiality matters because courts focus evidence and motion practice on facts that can change the legal outcome. The concept is especially important in summary judgment, fraud, contract disputes, evidence rulings, and disclosure obligations.
It helps explain why some details are excluded or ignored even when they are true.
Where it appears
Materiality appears in evidence objections, summary-judgment motions, fraud claims, discovery disputes, disclosure rules, and appellate review.
Practical example
In a breach-of-contract case, whether the contract required delivery by June 1 may be material. The color of the delivery truck probably is not material unless the contract or dispute makes it relevant.
How it differs from nearby terms
Materiality differs from relevance. Relevance asks whether evidence tends to prove something. Materiality asks whether that something matters legally.
It also differs from burden of proof, which concerns who must prove the fact and to what standard.
Related terms
Quick knowledge check
Question: What makes a fact material?
Answer: It matters under the legal issues that can affect the outcome.