Definition
Special assumpsit is a common law form of action brought to enforce a specific, express contract. The plaintiff's declaration sets out the precise terms or legal effect of the actual agreement between the parties — the contract itself is the stated foundation of the claim. Recovery is sought for breach of that identified agreement, not for a generalized debt said to arise from it.
Special assumpsit stands in contrast to general assumpsit, in which the plaintiff does not plead the original contract directly but instead declares for a debt or obligation implied by law to have arisen from the transaction. In special assumpsit, the agreement is front and center; in general assumpsit, it recedes behind the implied-in-law obligation.
Common Confusion
Special assumpsit vs. general assumpsit: These two forms of action are closely related and are sometimes treated as interchangeable in casual historical writing, but they are procedurally and substantively distinct. In special assumpsit, the declaration must spell out the particular contract — its terms or their legal effect — and the plaintiff is bound by what is pleaded. A variance between the contract as pleaded and the contract as proved at trial was fatal. In general assumpsit, the plaintiff instead relies on one of the common counts (such as indebitatus assumpsit for money had and received, or quantum meruit), which did not require pleading the original agreement. This meant general assumpsit was both more flexible and more forgiving of proof variance. Researchers should be cautious: historical sources sometimes use "assumpsit" alone to mean either form, and the specific procedural consequences described may not apply uniformly to both.
Special assumpsit vs. covenant: Where a contract was under seal, the proper action at common law was covenant, not assumpsit. Special assumpsit was available only for simple (unsealed) contracts. Historical sources occasionally blur this line when discussing hybrid instruments or part-performance situations.
Core Elements
For a declaration in special assumpsit to be sufficient at common law, the plaintiff was required to establish:
1. Existence of a specific, express contract — the agreement must be identified; a mere implied obligation was insufficient.
2. Pleading of terms or legal effect — the declaration had to set out either the precise language of the agreement or its operative legal effect with enough particularity to define the obligation.
3. Consideration — as with all assumpsit actions, the contract had to be supported by consideration, distinguishing it from obligations enforceable by debt or covenant.
4. Breach — the defendant's failure to perform the specific obligation as pleaded.
5. Damages — resulting loss to the plaintiff traceable to that breach.
Why It Matters in Research
Special assumpsit is a foundational concept for reading any English or American common law contract case decided before the merger of law and equity, and in many American jurisdictions before the mid-nineteenth century procedural reforms (Field Code and its successors). The form of action chosen governed what could be pleaded, what evidence was admissible, and what remedy was available. A researcher encountering an old contract dispute needs to identify which form of assumpsit was pleaded before the substantive analysis makes sense.
The variance trap is particularly important: because special assumpsit tied the plaintiff to the contract as declared, courts were strict about mismatches between pleading and proof. Cases were lost not on the merits but on formal discrepancies between the contract as stated in the declaration and the contract as established at trial. When reading older opinions, what appears to be a holding about contract law may actually be a ruling on pleading sufficiency.
After procedural merger under codes and modern rules, the distinction between special and general assumpsit lost its formal significance — plaintiffs no longer had to elect a form of action. However, the substantive distinction between express contract and implied-in-law obligation survives in modern contract doctrine, and courts occasionally invoke assumpsit terminology when tracing doctrinal history. Researchers working in restitution and unjust enrichment will find the special/general assumpsit distinction directly relevant to understanding how quasi-contract claims separated from express contract claims historically.
In the Law Mind corpus, special assumpsit appears most heavily in pre-1850 English and American case law and treatise literature. Chitty on Contracts and the pleading treatises of the same era are the primary practical sources. Cross-referencing with entries on general assumpsit, indebitatus assumpsit, and the common counts will be necessary to fully map the assumpsit family.
Historical Dictionary Support
Black's and Bouvier's agree on the core definition without meaningful divergence: both identify special assumpsit as the form of action in which the plaintiff declares upon the specific contract, setting out its particular language or legal effect, and both contrast it with general assumpsit by reference to the debt/agreement distinction. Bouvier's formulation is marginally more precise in articulating why general assumpsit differs — it emphasizes that in general assumpsit the plaintiff "declares as for a debt arising out of the execution of the contract, where that constitutes the debt" — which is useful for understanding the implied-obligation logic underlying the common counts.
Neither source addresses the procedural consequences of variance, the seal limitation, or the post-code collapse of the distinction. Researchers relying solely on the dictionary definitions will have a correct but incomplete picture. The practical architecture of special assumpsit — its pleading requirements, the fatal variance rule, its relationship to the other forms of action — must be reconstructed from treatise literature and the cases themselves.
Jurisdictional Note
Special assumpsit as a distinct form of action was abolished or rendered obsolete in most American jurisdictions by nineteenth-century procedural reform codes, and in England by the Common Law Procedure Acts of 1852 and 1854 and the Judicature Acts of 1873–1875. In a handful of states that retained common law pleading for an extended period, the distinction remained operative into the late nineteenth century. Researchers should check local procedural history before assuming uniform obsolescence.
Encyclopedia Cross-Reference
See Law Mind Encyclopedia: Assumpsit; Forms of Action; Common Counts; History of Contract Law