Definition
Dead freight is the freight charge payable by a charterer who has contracted for the use of a vessel's full cargo capacity but fails to supply a complete cargo. When a merchant charters a whole vessel — committing to fill it — but loads only a partial cargo, the shipowner is nonetheless entitled to payment for the unoccupied space. The sum paid for that unoccupied capacity is called dead freight.
The liability arises from the charterer's contractual obligation, not from any goods actually carried. Because the shipowner has reserved the vessel's entire carrying capacity for the charterer and foregone other cargo, the charterer owes compensation for the shortfall whether or not any freight is physically moved in those empty holds.
A secondary usage found in older sources treats "dead freight" as the unoccupied portion of the cargo space itself — the unfilled capacity — rather than the money paid for it. Context generally makes clear which sense is intended, but researchers should note the distinction.
Common Language
Modern common usage (Wiktionary): "A sum of money paid by a person who charters a whole vessel but fails to make out a full cargo. The payment is made for the unoccupied capacity."
The Wiktionary definition tracks the legal meaning closely, which is itself a term of art from maritime commerce. There is no ordinary lay use of "dead freight" outside shipping and charter contexts. The word "dead" here functions as it does in "dead capital" or "dead weight" — describing something unproductive or unused — not as a term with independent common meaning that diverges from the legal one.
Common Confusion
Dead freight should not be confused with demurrage. Demurrage is compensation owed to a shipowner when a charterer detains the vessel beyond the agreed laydays for loading or unloading. Dead freight addresses the failure to supply cargo at all; demurrage addresses delay in the loading or discharge process. Both arise from a charterer's failure to perform, but they attach to different breaches and are calculated differently. Researchers working through charter party disputes in historical case law will frequently encounter both claims pleaded together, but they remain distinct obligations.
Why It Matters in Research
Dead freight is a specialized maritime and commercial term that appears primarily in admiralty case law, charter party litigation, and shipping treatises. Researchers should be alert to several features of the historical record:
The term is stable in meaning across the major dictionaries, but its dual usage — sometimes the unfilled space, sometimes the money paid for it — can create ambiguity in older pleadings and judicial opinions. Read surrounding context before assuming which sense an older source intends.
The master's right to mitigate matters practically. Bouvier notes that unless restrained by the charter party's specific terms, the master may take on other goods to fill the unoccupied space. When the master does so, the dead freight obligation is reduced or eliminated for the space actually filled by substitute cargo. This point is often buried in treatise discussions and is important for calculating damages in historical disputes.
Because dead freight liability is contractual in origin, its contours are shaped heavily by the specific language of individual charter parties. Researchers examining historical disputes should locate the charter party itself — not just the court's summary — to understand what the parties actually agreed.
American and English case law both recognize dead freight, and the English cases are routinely cited in American admiralty courts. The two leading cases appearing in the historical dictionaries — Gray v. Carr and Phillips v. Rodie — are English decisions, and their reasoning was widely adopted in U.S. admiralty practice.
Historical Dictionary Support
The historical dictionaries are in close agreement on the core definition. Black's (2nd Ed.) provides the clearest formulation: when a merchant charters a whole vessel but puts on board only part of the intended cargo, "the freight thus due is called 'dead freight.'" Bouvier emphasizes the master's practical remedy — taking on substitute goods — and frames dead freight as the amount paid for contracted-but-unoccupied capacity. Rapalje & Lawrence offers the most compressed definition, capturing both the spatial sense (the unsupplied part of a cargo) and the monetary sense (the freight payable for the part not shipped), and is the only source among these to make the dual meaning explicit in a single entry.
None of the historical dictionaries address how dead freight interacts with bill of lading practice, freight prepayment clauses, or the calculation of damages when substitute cargo is only partially obtained. Researchers needing that depth should move from the dictionary sources into admiralty treatises and the case law directly.
Jurisdictional Note
Dead freight is recognized in both English and American admiralty law, with no significant divergence in the basic doctrine. Calculation of the amount owed — particularly when the master takes substitute cargo — may be handled differently depending on the charter party's governing law clause and the applicable admiralty jurisdiction. Researchers dealing with modern international shipping disputes should also consult applicable charter party standard forms, as industry-standard clauses frequently modify the common law baseline.