Definition
Per year means for each year; at a yearly rate. The phrase operates as a unit-of-time modifier, specifying that a quantity — interest, rent, wages, damages, a penalty, or a recurring obligation — accrues, is measured, or becomes due on an annual basis.
In legal instruments, per year functions identically to "per annum," "annually," and "yearly." When attached to a rate or sum, it fixes the temporal denominator: a payment of $1,200 per year means $1,200 accrues over each full calendar or contract year, typically pro-rated for partial periods unless the instrument specifies otherwise.
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Common Language
Modern common usage (Wiktionary): "Per year" is a standard English adverbial phrase meaning "for each year" or "in every year," used in everyday contexts such as salary descriptions, subscription costs, or statistical rates.
Historical common usage (Webster's 1913): Webster's 1913 does not give per year a dedicated entry, treating it as a transparent compositional phrase: "per" (by, for each) combined with "year" (a period of twelve months).
The common meaning and the legal meaning are essentially coextensive. The only gap worth noting is precision: in legal drafting, per year carries consequences for computation of interest, penalties, and limitations that ordinary usage does not foreground. A reader scanning a contract who treats "per year" as informal shorthand may miss its role as a term of art fixing the accrual period.
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Why It Matters in Research
**Interchangeability with per annum.** Courts and commentators treat per year and per annum as fully equivalent. Researchers searching historical instruments, pleadings, or judicial opinions should query both forms. Latin-preferring nineteenth-century sources lean heavily on per annum; twentieth-century plain-language drafting shifts toward per year. Missing one form can produce an incomplete picture of how a rate or obligation was expressed.
**Accrual and pro-ration problems.** When a legal dispute turns on whether an obligation accrued daily, monthly, or annually, the phrase per year is often the operative language. Research into damages calculations, interest awards, or rent disputes should locate the instrument's exact wording, because courts have disagreed on whether a per year rate implies daily accrual (dividing by 365) or lump annual accrual. The research question is usually not what per year means in the abstract but how the surrounding instrument structures the payment schedule.
**Ambiguity between calendar year and contractual year.** Unless the instrument defines "year," per year can refer to a calendar year (January–December), a fiscal year, or a rolling twelve-month period measured from execution or first payment. Historical cases involving leases, annuities, and salary disputes frequently turn on this ambiguity. Researchers should check whether the instrument or the governing jurisdiction supplied a default definition of "year."
**Statutory rate contexts.** Many statutes fixing interest rates, penalty rates, or fee schedules use per year or per annum as the unit. When researching pre-modern rate statutes, note that the face rate per year may be nominal (not compounded), while modern equivalents are often expressed as annual percentage rates with compounding assumptions built in. The surface-level equivalence of "per year" across eras can obscure a real economic difference.
**Single historical source.** Law Mind's dictionary corpus contains only the Bouvier's entry for this phrase, which is spare — it confirms equivalence with "annually" and cites a New York case without elaboration. Researchers should not expect deeper historical dictionary treatment of what was considered a self-evident phrase.
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Historical Dictionary Support
Bouvier's Law Dictionary states simply that per year is "Equivalent to the word 'annually,'" citing a New York authority. This entry is deliberately minimal: Bouvier treats per year as a definitional pass-through rather than a term requiring independent analysis. The brevity reflects the era's assumption that the phrase needed no more explanation than per diem or per capita.
No divergence exists among the available historical sources because only one source covers the term. The absence of treatment in other historical dictionaries (Black's, Burrill, Wharton) is itself informative: per year was regarded as too plain to require a formal entry, its meaning borrowed from ordinary English and anchored by its Latin equivalent per annum. Researchers should treat the Bouvier entry as a cross-reference marker rather than a substantive definition.
What historical sources collectively miss is the interpretive work courts actually perform around per year: the accrual method disputes, the calendar-versus-fiscal-year ambiguities, and the compounding questions that make the phrase legally consequential despite its apparent simplicity.
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Jurisdictional Note
No significant jurisdictional variation affects the core meaning of per year. However, default accrual rules — how courts fill gaps when instruments say "per year" without specifying payment intervals — vary by jurisdiction and by the type of obligation (interest, rent, wages). Researchers working across jurisdictions should not assume that a uniform face meaning produces uniform legal results.
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Encyclopedia Cross-Reference
No single Law Mind Encyclopedia entry is a natural primary match for per year as a general term. For specialized contexts where the phrase does interpretive work, see:
- The Law Mind Tax Encyclopedia: Credit for Prior Year Minimum Tax (tax_21) — for annual computation periods in tax contexts
- The Law Mind Constitutional Law Encyclopedia: The Takings Clause — Physical Takings and Per Se Rules (constitutional_66) — for per se rate structures in regulatory contexts
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