Definition
Final costs are the litigation expenses and court charges whose liability is determined by—and becomes payable at the conclusion of—a lawsuit. They are distinguished from interlocutory or provisional cost awards made during the pendency of the action. The losing party (or the party the court designates) becomes responsible for final costs only once the case reaches its terminal judgment or decree.
The concept operates in two related but distinct senses:
1. Timing: Final costs are assessed at the end of the suit, as opposed to costs awarded on individual motions or interlocutory rulings that may be collected before the litigation concludes.
2. Contingency on outcome: The ultimate liability for final costs depends on how the case resolves. A party who posts a cost bond or security for costs is not required to pay until the final result is known.
Common Confusion
FINAL COSTS vs. INTERLOCUTORY COSTS. Courts sometimes award costs on discrete pretrial motions—discovery sanctions, motions to compel, voluntary dismissals—before the case ends. These are interlocutory costs, collectible immediately regardless of who ultimately prevails. Final costs, by contrast, cannot be assessed or enforced until the litigation terminates. Researchers conflating the two may misread cost orders as dispositive when they are procedural, or vice versa.
FINAL COSTS vs. COURT COSTS vs. ATTORNEYS' FEES. "Court costs" is the broader genus—all judicially imposed charges, including filing fees, service fees, and witness fees. Final costs is a temporal subcategory, not a distinct type of charge. Attorneys' fees, unless specifically authorized by statute or contract, are generally not included in either category under the American Rule.
Why It Matters in Research
The phrase "final costs" is most commonly encountered in older common law pleading and equity practice, where cost bonds and security-for-costs motions were routine features of litigation. In modern federal practice, the analogous concept survives principally through Rule 54(d) of the Federal Rules of Civil Procedure and the taxable-costs framework of 28 U.S.C. § 1920, but the specific phrase "final costs" rarely appears in contemporary judicial opinions. Researchers working with nineteenth- and early twentieth-century case reporters, equity records, or state court filings will encounter the term frequently; those working in modern federal litigation will find it largely replaced by "costs of suit," "taxable costs," or simply "costs."
A trap in historical sources: in equity proceedings, "final costs" could include solicitor's fees and charges that would not qualify as taxable costs under modern statutes. The scope of what counted as a "cost" was broader and more discretionary in equity than at common law, and broader still in some state courts than in federal practice. A historical award of "final costs" should not be assumed to map directly onto the modern § 1920 schedule.
Jurisdictional variation matters significantly in historical research. State courts differed—and continue to differ—on whether "costs follow the event" automatically or whether the court retains discretion. In jurisdictions following the English rule, final costs to the prevailing party were nearly automatic; in American jurisdictions adopting the discretionary model, the same phrase carried a softer meaning.
The term also appears in older cost-bond practice. When a nonresident or impecunious plaintiff was required to post security, the bond was typically conditioned on payment of "final costs" if the plaintiff did not prevail. Researchers tracing security-for-costs doctrine should use "final costs" as a search term in tandem with "cost bond" and "security for costs."
Historical Dictionary Support
Black's Law Dictionary and Bouvier's Law Dictionary give identical definitions, word for word: "Such costs as are to be paid at the end of the suit; costs, the liability for which depends upon the final result of the litigation." The agreement across both dictionaries reflects that this was a settled, uncontroversial term of art in the common law tradition—there was no doctrinal dispute about what it meant, only variation in how courts applied it.
Neither historical source addresses the distinction between final costs in equity versus at law, the scope of what charges qualify, or how the concept interacts with cost-bond practice. Both sources are silent on jurisdictional variation. For researchers, this means the dictionary definitions are reliable as a baseline but insufficient as a complete guide. Supplementary research in treatises on costs—such as those by Archibald (Costs in Civil Actions) or the older English works on equity practice—will be necessary for cases where the precise scope of "final costs" is at issue.
Jurisdictional Note
In federal court, the concept of final costs is now governed largely by Rule 54(d) and 28 U.S.C. § 1920, which enumerate what may be taxed as costs. State courts vary considerably: some follow fee-shifting statutes that expand the category beyond the federal model, others limit costs to a statutory schedule, and a few retain broader equitable discretion. Historical state court records should be read against the cost statutes in force at the time of the proceeding.
Encyclopedia Cross-Reference
The Law Mind Civil Procedure & Evidence Encyclopedia: Costs and Taxation of Costs — Rule 54(d) and 28 USC 1920 [civpro_142]