Definition
In accounting and financial law, "rests" refers to the periodic striking of a balance in an ongoing account — particularly in mortgage accounts and trust accounts — at fixed intervals, for the purpose of computing interest. At each rest, accumulated interest is added to the principal, and the resulting balance becomes the new base on which future interest accrues. The practical effect is to permit compound interest: interest earns interest from the date of each rest forward.
The term operates as a plural noun referring to these periodic settlement points, not as a verb. A "rest" (singular) is one such balancing; "rests" describes the practice or the series of balancing dates as a whole.
Common Language
Modern common usage (Wiktionary): Third-person singular simple present indicative of the verb "rest" — as in "she rests."
Historical common usage (Webster's 1913): "Rests" appears primarily as the conjugated verb form of "rest" (to repose, to cease from action) or as the plural of the noun "rest" (a pause, a state of repose).
The gap here is total. Nothing in ordinary English usage of "rests" anticipates the technical accounting meaning. A researcher encountering "rests" in a mortgage instrument, trust account record, or chancery proceeding would have no intuitive footing from common usage. The term functions as specialized financial vocabulary embedded in legal documents, easily misread as the common verb form.
Common Confusion
"Rests" in this technical sense should not be confused with the verb "rests" as it appears in procedural contexts — as in "plaintiff rests" (meaning the party has concluded presenting evidence at trial). These are entirely distinct uses. In a trial transcript, "plaintiff rests" is a procedural declaration; in a mortgage or trust account document, "rests" describes interest-compounding intervals. The surrounding document type is the clearest signal: financial instruments and equity accounting records signal the technical meaning; pleadings and transcripts signal the procedural one.
Why It Matters in Research
Researchers working with historical mortgage documents, trust accountings, or chancery records will encounter "rests" as a term of art in financial calculations. Its significance lies in what it implies about interest computation: a document specifying "annual rests" or "quarterly rests" is authorizing compound interest at those intervals, not simple interest. Missing this distinction can cause fundamental misreading of what a party was owed or what a trustee was authorized to charge.
The term appears most frequently in nineteenth-century equity practice, where courts of chancery supervised trust and mortgage accounts and were alert to whether compound interest had been properly authorized. Unauthorized compounding — taking rests without authority — was a recognized ground for surcharging a trustee or mortgagee. Researchers tracing fiduciary liability or mortgage disputes in this period should treat the presence or absence of "rests" as a substantive fact, not background language.
The term is largely absent from modern legal drafting, where "compound interest" and explicit compounding schedules have replaced it. This creates an asymmetry: the concept survives in modern law, but the vocabulary has shifted. Researchers moving between historical and modern sources need to recognize that a historical instrument authorizing "rests" is the functional equivalent of a modern clause specifying compounding frequency.
Cross-jurisdictional use was broadly consistent in common-law systems, but the permissibility of compound interest — and thus the legal effect of authorized rests — varied by jurisdiction and era. Some courts were hostile to compound interest absent express authorization; others permitted it in specific contexts such as trust surcharges.
Historical Dictionary Support
The sources are consistent and narrow. Bouvier's provides the most complete statement: rests consist in "striking a balance of the account, at the end of any fixed period, upon which interest is allowed, thus giving the benefit of compound interest," citing Parsons on Contracts. Black's confirms the definition as "periodical balancings of an account, particularly in mortgage and trust accounts, made for the purpose of convert—" (the entry appears truncated in the corpus). Anderson's cross-references "REST, 2" without restating the definition independently, signaling that the term was understood as settled enough to need only a pointer.
What the historical dictionaries do not address: they treat the definition as self-evident once the accounting mechanism is described, but they do not discuss when rests were legally permissible, what authorization was required, or the remedial consequences of unauthorized compounding. Researchers should not read the dictionary definitions as resolving those substantive questions — those answers live in treatises and case law, not in the definitional sources.
Jurisdictional Note
The permissibility of compound interest in mortgage and trust accounts — and therefore the legal consequence of authorized rests — has historically varied across American jurisdictions and has shifted over time within jurisdictions. Some states required express contractual or statutory authorization; others allowed it by custom in trust accountings. Researchers should not assume that a document authorizing rests produced the same legal effect in all forums.