Definition
In pleading, new matter is any factual allegation not previously raised by either party in the pleadings. It introduces facts that go beyond a simple denial of the opponent's allegations — facts that, if proven, would defeat, reduce, or modify the opposing party's claim or defense even if every allegation in that party's pleading were admitted as true.
New matter is most commonly encountered in two contexts:
1. In an answer or responsive pleading, where a defendant raises affirmative defenses (such as accord and satisfaction, statute of limitations, or fraud) that rest on facts outside the plaintiff's complaint. These defenses must be affirmatively pleaded because they depend on new factual ground, not merely on contesting the plaintiff's version of events.
2. In a reply, where a plaintiff responds to new matter raised in the defendant's answer by introducing additional facts that answer or avoid the effect of the defendant's new allegations.
The procedural consequence of new matter is significant: a party who raises it must plead it specifically. A general denial is insufficient. In systems that require verification, new matter typically must be verified. Failure to plead new matter in the appropriate responsive pleading can result in waiver.
Common Confusion
New matter is sometimes confused with a general denial or with facts offered merely to traverse (directly contradict) an opponent's allegation. The distinction is substantive: a traversal contests whether the opponent's alleged facts are true; new matter introduces independent facts that operate as an avoidance — conceding, for pleading purposes, that the opponent's allegations may be true while asserting facts that nonetheless defeat the claim. A statute of limitations defense is the classic example: the defendant need not deny that the plaintiff was injured, only assert that the claim is time-barred by facts the plaintiff never mentioned.
New matter should also be distinguished from an amendment. An amended pleading may introduce new matter by substituting or supplementing previously pleaded facts, but "new matter" as a term of art refers to the nature of the factual content, not to the procedural vehicle by which it is introduced.
Why It Matters in Research
The concept of new matter sits at the intersection of pleading theory and waiver doctrine, which makes it a recurring issue in both historical and modern civil procedure research.
In historical sources, new matter is a creature of formal common law pleading and carries technical weight that modern researchers may underestimate. Under special pleading systems, the rules governing what constituted new matter, when it had to be verified, and what happened if it was not properly pleaded were elaborate and unforgiving. Bouvier's references to Gould, Chitty, and Stephen on pleading signal that the doctrine was heavily treatise-driven. Researchers working in pre-code American or English sources will need to engage with those treatise frameworks to understand how courts analyzed new matter disputes.
With the shift to code pleading (mid-19th century) and then notice pleading under the Federal Rules of Civil Procedure (1938), the formal vocabulary of "new matter" receded in federal practice. Modern federal courts typically use the language of "affirmative defenses" (FRCP Rule 8(c)) rather than "new matter," though the underlying concept is identical. State courts — particularly those operating under code pleading systems derived from the Field Code — often retained "new matter" as explicit statutory terminology. Researchers working in California, Oregon, Pennsylvania, and other code-pleading states will still encounter the term in statutes and case law as a live doctrinal category.
The equity dimension flagged (but unfortunately truncated) in Bouvier's entry is worth pursuing: equity courts developed their own rules about when new matter could be raised in an answer and whether it required a cross-bill. Researchers in chancery-era equity materials should not assume that the pleading-at-law rules map cleanly onto equity practice.
A practical trap: in some jurisdictions, failure to raise new matter — particularly affirmative defenses — in the first responsive pleading constitutes permanent waiver. Researchers tracing the waiver consequences of unpleaded new matter will find the case law dense and jurisdiction-specific.
Historical Dictionary Support
Black's definition is minimal: "matter of fact not previously alleged by either party in the pleadings." It accurately captures the core concept but strips away all procedural context.
Bouvier is more instructive, confirming that under special pleading, new matter had to be pleaded in avoidance and generally required verification. The string citation to Gould, Chitty, Stephen on Pleading, Comyns's Digest, and Williams's Saunders places the doctrine squarely within the classical common law pleading tradition. Neither dictionary addresses the modern transformation of this concept into the affirmative defense framework, which is the primary gap researchers should note. Neither source addresses the Federal Rules context, nor do they capture the variation that emerged as American states diverged between code and notice pleading systems across the 19th and 20th centuries.
Jurisdictional Note
Pennsylvania's Rules of Civil Procedure explicitly use "new matter" as a defined category of responsive pleading, distinct from preliminary objections and the answer proper, making the term a live procedural category in that jurisdiction. California and other Field Code jurisdictions similarly preserve new matter terminology in their practice. Federal courts under the FRCP use "affirmative defenses" rather than "new matter," but the substance is largely coextensive with Rule 8(c).
Encyclopedia Cross-Reference
civpro_177: Impeachment by Contradiction and Collateral Matters Doctrine (The Law Mind Civil Procedure & Evidence Encyclopedia) — relevant to the boundary between contesting existing allegations and introducing new factual ground.