Definition
In banco (also rendered in banco, in banc, or in bank) is a Latin phrase meaning "on the bench" or "in the bench." It describes proceedings conducted before the full court sitting together in its formal judicial capacity, as distinguished from proceedings held before a single judge traveling on circuit or sitting at nisi prius.
The term carries two related but distinct applications:
1. Full court proceedings. When a court sits in banco, all or a quorum of its judges convene together to hear argument, decide motions, pronounce judgment on points of law, or discharge other formal business of the court. This is opposed to the work of a single judge sitting alone, whether at trial or on circuit.
2. English Court of Common Bench. In banco was also used specifically to identify proceedings in the Court of Common Pleas (Common Bench) in England, which historically heard civil matters before its full panel of judges sitting at Westminster, as opposed to judges dispatched to the counties under the assize system.
Common Confusion
IN BANCO / IN BANC / EN BANC: These three forms refer to the same underlying concept and are used interchangeably in historical and modern sources. The Latin in banco and in banc appear in older English and American legal writing; en banc is the French-derived form that has become standard in modern American practice, particularly in federal appellate courts. Researchers moving between historical and modern materials should treat all three as equivalent and search accordingly.
IN BANCO vs. IN CAMERA: These are sometimes confused because both describe the manner in which a court convenes. In banco means the full court sitting in open judicial session; in camera means the court or a judge sitting privately, typically in chambers and away from public view. They describe opposite settings.
IN BANCO vs. AT NISI PRIUS: Nisi prius proceedings were jury trials conducted by a single judge traveling to the counties under a commission from the superior courts. In banco proceedings were the superior court's own formal sessions at Westminster or at its fixed seat. A case might be tried at nisi prius but argued on a point of law in banco. Understanding this distinction is essential for reading older English and early American reports correctly.
Why It Matters in Research
The phrase appears throughout English common law reports and early American case law, often without explanation, because contemporaneous readers understood the procedural geography it described. Researchers working in pre-twentieth-century sources will encounter it regularly and must recognize that it marks a jurisdictional and procedural distinction — not merely a logistical one.
Several traps await the unwary reader:
First, the spelling varies. In banco, in banc, in bank, and en banc all appear in the corpus. Database keyword searches should account for all variants, especially in older digitized reports where OCR may introduce additional corruptions (e.g., "in bane" for "in banc").
Second, the significance of the in banco/nisi prius distinction collapses in American practice much earlier than researchers sometimes assume. As American courts consolidated their structures through the nineteenth century, the nisi prius system faded, and with it the functional contrast that gave in banco its meaning. By the late nineteenth century, American writers were already using en banc primarily to mean a full appellate panel, stripped of the English procedural context.
Third, Bouvier's entry ties in banco directly to the English superior courts of common law — King's Bench, Common Pleas, and Exchequer — and their specific sitting arrangements, including the rotation of puisne judges. This historical specificity matters when dating legal sources: a reference to proceedings in banco in an English report before 1873 (the Judicature Acts) carries different institutional weight than the same phrase in a post-consolidation context.
Fourth, the term appears in American state court opinions well into the twentieth century, particularly in states with multi-judge trial courts, to indicate that all judges of a division or district are sitting together. This usage is substantively equivalent to en banc but may not be indexed that way.
Historical Dictionary Support
Black's Law Dictionary (both editions) gives a compact but accurate definition, correctly pairing in banco against nisi prius and noting the Court of Common Bench connection. The entry is brief because the concept was assumed to be familiar; Black's was writing for practitioners who already knew their English procedural history.
Bouvier's is more instructive. It situates in banco within the actual structure of the English superior courts, noting that the puisne judges (associate justices, in American terms) sat by rotation so that no more than three sat in banco at any one time except when absences required otherwise. This detail illuminates why in banco proceedings were prestigious and definitive: they represented the considered judgment of the court as an institution, not the work of a single itinerant judge. Bouvier's cross-reference to "in banc" signals that he treats the terms as identical.
Neither Black's nor Bouvier's fully addresses the American evolution of the concept or its modern survival as en banc in the federal appellate context. That gap is significant: a researcher relying solely on the historical dictionaries would not learn that the term lived on, transformed, and acquired a new technical home in appellate procedure.
Jurisdictional Note
In modern American federal practice, the functional successor to in banco is en banc, governed by Federal Rule of Appellate Procedure 35 for the circuit courts. Most states have parallel rules. In England, the Judicature Acts 1873–1875 reorganized the superior courts and made the in banco/nisi prius distinction structurally obsolete, though the vocabulary persisted in legal writing for some decades after.
Encyclopedia Cross-Reference
See Law Mind Encyclopedia — En Banc (for modern doctrine and federal appellate practice); Common Law Courts of England (for the institutional context of King's Bench, Common Pleas, and the nisi prius system).