Definition
A statutory award of costs calculated at a multiplied rate above ordinary taxed costs, historically imposed as a penalty against a party who brought or defended an action without lawful justification or in bad faith. Despite the word "treble" suggesting three times the standard amount, the historical English calculation did not literally triple base costs. The American usage, particularly in Pennsylvania and under certain statutes, applied a more straightforward multiplication.
Treble costs must be distinguished from treble damages. Treble costs are an enhanced award of litigation expenses (filing fees, service fees, officer fees, and the like); treble damages are an enhanced award of compensatory relief for the underlying wrong.
Common Confusion
Treble costs and treble damages are routinely conflated, including in historical sources that treat them as interchangeable penalty mechanisms. They are not. Treble damages multiply the compensatory award itself — what the plaintiff lost. Treble costs multiply only the procedural expenses of litigation. Some statutes award both; many award only one. Researchers working in antitrust, patent, or consumer protection materials must be alert to which penalty a given provision imposes, because the financial consequences and the pleading requirements differ substantially. A further confusion arises from the word "treble" itself: in English practice, treble costs did not mean three times ordinary costs. The actual computation produced a result closer to one and three-quarters times ordinary costs. American statutes that use the phrase often intend a true tripling, creating a false equivalence with the English term.
Why It Matters in Research
The single greatest trap for corpus researchers is the computation problem. When a historical English source says "treble costs," the amount awarded was not three times the base figure. Burrill and Tidd (via Black's) describe a layered addition: common costs, plus half of common costs (double costs), plus half of that half (treble costs) — yielding roughly 1.75 times the base. Bouvier confirms the formula explicitly: taxed costs plus three-fourths of taxed costs added thereto. Any researcher reading a Victorian-era English case or treatise and assuming "treble" means "triple" will misread the financial stakes.
American materials diverge sharply. Bouvier's Pennsylvania rule produces a true tripling — three times the usual costs, with specified exceptions for officer fees. Modern American statutes that authorize treble costs (sometimes as a sanction for frivolous litigation or bad-faith conduct) typically use the literal tripling formula. The shift from the English fractional-addition method to the American literal-multiplication method is undocumented in most secondary sources and creates silent inconsistency across the corpus.
Historically, treble costs attached by statute in specific categories of cases — actions on penal statutes, certain trespass actions, vexatious suits — and were not a general remedy available at judicial discretion. Researchers should not assume that treble costs were available merely because a party acted improperly; the statutory predicate must be identified. This distinguishes treble costs from modern attorney-fee sanctions, which rest on court discretion rather than statutory mandate.
Jurisdictional variation also affects whether treble costs survive as a live remedy. In many American jurisdictions the remedy has been absorbed into or replaced by Rule 11 sanctions, fee-shifting statutes, or discretionary cost-award provisions. Historical references to treble costs in American state materials may therefore reflect defunct statutory schemes rather than current practice.
Historical Dictionary Support
Burrill's Law Dictionary provides the most complete technical account, drawing on Tidd's Practice for the English computation formula. The description — common costs, plus half of common costs, plus half of that half — is the governing English definition and explains why the term is a term of art rather than a literal mathematical instruction. Burrill flags the interpretive point explicitly: "treble" is not understood in its literal sense. This caveat is the most important single piece of information about the term and should be the starting point for any historical research.
Black's Law Dictionary (1st edition) reproduces the Tidd/Burrill formulation without meaningful addition. The 2nd edition entry offers only a cross-reference to the general Costs entry, which is less useful for researchers focused on the treble costs computation specifically.
Bouvier's is the most valuable source for American practice because it identifies the Pennsylvania divergence and notes that American statutes producing a true tripling represent a different rule from the English model. Bouvier also notes the officer-fee exception in Pennsylvania, a detail absent from the English sources.
None of the shelf sources address the relationship between historical treble costs statutes and modern penalty mechanisms. The historical dictionaries treat treble costs as a live English procedural remedy; they do not track its decline in American practice or its displacement by discretionary sanctions. Researchers working in 20th- or 21st-century American materials should treat the historical entries as background, not as statements of current law.
Jurisdictional Note
In English common law jurisdictions, treble costs historically rested on specific statutory authorization and followed the fractional-addition computation described in Tidd. American jurisdictions that adopted the remedy often modified both the triggering conditions and the computation, with some (like Pennsylvania) applying a true tripling. In federal practice, treble costs as a distinct remedy are largely obsolete; cost awards are governed by Rule 54(d) and 28 U.S.C. § 1920, which do not incorporate a treble-costs mechanism.
Encyclopedia Cross-Reference
civpro_142: Costs and Taxation of Costs — Rule 54(d) and 28 USC 1920 (The Law Mind Civil Procedure & Evidence Encyclopedia)