Word limits are a fundamental feature of appellate practice, shaping how advocates present their arguments and how courts manage increasingly complex caseloads. Although the Federal Rules of Appellate Procedure appear straightforward on their face, applying them in appeals involving multiple parties, consolidated cases, or cross-appeals can quickly become far more complicated. Understanding these rules—and using them strategically—is an important part of effective appellate advocacy.
Under the Federal Rules of Appellate Procedure, principal briefs are generally limited to 13,000 words, while reply briefs are limited to 6,500 words, although some federal circuits impose different limits through local rules. These restrictions were introduced to replace outdated page limits, reflecting the reality that modern word-processing technology made page counts an increasingly unreliable measure of a brief’s length.
Word limits serve an important purpose. Appellate judges review hundreds of briefs each year, often alongside extensive records, appendices, statutes, and case law. Concise, focused advocacy not only respects the court’s limited time but also strengthens an attorney’s most persuasive arguments. Well-crafted appellate briefs emphasize clarity over volume, ensuring that key issues are fully developed without unnecessary repetition.
The application of these limits becomes more nuanced in complex appeals. Cases involving multiple appellants, multiple appellees, consolidated appeals, or cross-appeals may generate several separate briefs, dramatically increasing the total amount of briefing before the court. While each separately represented party may generally be entitled to its own briefing allocation, the overall volume of submissions can quickly become substantial.
To help streamline the process, Rule 28(i) permits parties to join in a single brief or adopt portions of another party’s brief by reference. This mechanism can reduce duplication and improve efficiency where multiple parties raise overlapping legal issues. However, courts generally require parties to identify the specific arguments being adopted rather than broadly incorporating another brief in its entirety. Several courts have also cautioned that incorporation by reference cannot be used simply to circumvent applicable word limits.
Federal appellate courts have taken different approaches to how incorporated material should be treated. Some courts have concluded that adopted arguments effectively count toward a party’s overall word limit, while others have held that Rule 28(i) contains no independent restriction on the number of words a party may adopt from another brief. Despite these differing views, courts consistently discourage attempts to use incorporation as a means of expanding briefing beyond what is reasonably necessary.
The Federal Rules also recognize that exceptional cases may justify oversized briefs. In particularly complex appeals involving numerous parties, multiple responding briefs, or unusually extensive factual or statutory background, appellate courts have discretion to grant motions requesting additional words where appropriate.
Ultimately, successful appellate advocacy is rarely measured by the number of words used. The strongest briefs identify the most compelling issues, develop them clearly, and eliminate unnecessary argument wherever possible. While complex appeals may require additional briefing, concise and disciplined writing remains one of the most effective tools available to appellate advocates. In many cases, saying less—and saying it well—can be the most persuasive strategy of all.