Definition
A historical English tax on personal property, levied periodically by act of Parliament, equal to one-fifteenth of the assessed value of the movable goods of every subject in each city, township, and borough throughout England. The tax was not a standing impost but was granted to the Crown by Parliament on specific occasions as an "aid" — a revenue measure tied to particular royal needs.
Under Edward III, the taxable property of the kingdom was formally assessed and a fixed valuation recorded in the Exchequer. From that point forward, a grant of a fifteenth did not require fresh assessment; Parliament could vote to levy a fifteenth and the sum due from each locality was simply read off the existing Exchequer record, then set at approximately £29,000 for the whole kingdom. This made fifteenths administratively predictable but increasingly unrealistic over time, as the recorded valuations grew stale and bore little relationship to actual wealth.
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Common Language
Modern common usage (Wiktionary): Simply the plural of "fifteenth" — an ordinal number.
Historical common usage (Webster's 1913): One of fifteen equal parts; an ordinal position in a sequence.
The gap here is significant. In legal and historical sources, "fifteenths" is not a reference to ordinal fractions in the abstract but to a specific, named fiscal instrument of medieval English public law. A researcher encountering the term in a parliamentary record, plea roll, or treatise on English taxation should not read it as a generic fraction. It names a discrete levy with a defined history, a fixed administrative machinery, and a technical parliamentary procedure for its grant.
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Why It Matters in Research
This term belongs almost exclusively to English legal history and will surface in Law Mind materials dealing with medieval and early modern parliamentary finance, royal prerogative, and the development of representative government's power over taxation. Several research traps apply.
First, the term is plural by convention even when describing a single grant. Parliament voted "a fifteenth and tenth" (combining the rate applicable to boroughs and cities with that applicable to rural areas) as a paired levy. Researchers finding "tenths and fifteenths" in a source should treat this as a standard compound grant formula, not two separate analytical categories.
Second, the fixed valuation problem is a recurring theme in historical legal scholarship. After Edward III's reign the assessments became fossils. Parliament continued to vote fifteenths — and the Crown continued to count on them — but the amounts collected no longer reflected the nation's actual wealth. By the Tudor period, this had become a recognized deficiency, and new direct taxes (notably the subsidy) were developed partly to work around it. Sources written before and after this transition use the same vocabulary but describe fiscally very different realities.
Third, the term has no modern legal life in any common law jurisdiction. Researchers who encounter it in secondary sources discussing constitutional history — particularly the development of Parliament's power to control taxation — should understand it as a historical antecedent concept, not a living doctrine. It is relevant background for understanding why parliamentary consent to taxation became constitutionally required, a thread that runs directly into later Anglo-American constitutional law.
Fourth, the encyclopedia entries tagged to this term address the Fifteenth Amendment to the U.S. Constitution. That amendment concerns voting rights and racial equality — it has no substantive connection to the English fiscal term. The orthographic overlap is a false cognate. Researchers should not carry analysis from one to the other.
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Historical Dictionary Support
The source dictionaries are in close agreement on core substance. All five sources identify fifteenths as a Parliamentary grant to the Crown, assessed against personal property, and equal to one-fifteenth of assessed value. Bouvier adds the most useful institutional detail, noting that the Edward III valuation fixed the sum at £29,000 and that subsequent grants drew on that static record rather than fresh assessment — a point that explains both the administrative convenience and the long-term fiscal distortion of the system.
Burrill flags the Latin and French equivalents (decima quinta; quinzieme), which is useful for researchers working with Latin Year Book entries or French law dictionaries of the same period.
Rapalje & Lawrence is the least expansive, folding the definition into a broader discussion with compressed treatment. Black's (both editions) gives the clearest narrative account of the Edward III standardization. None of the historical dictionaries address the paired "tenths and fifteenths" formula in depth, which is a gap for researchers working with parliamentary records from the fourteenth century onward, where that compound grant appears routinely.
No source addresses the eventual obsolescence of the instrument or its relationship to the later Tudor subsidy system — researchers needing that evolution must move beyond the dictionary shelf to fiscal history sources.
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Jurisdictional Note
Fifteenths are a creature of English law with no direct counterpart in Scots law, Irish law, or American law. The term may appear in early colonial American sources as part of background discussions of English constitutional history, but it never took root as an operational legal concept in any American jurisdiction.
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Encyclopedia Cross-Reference
Note: The Law Mind Encyclopedia entries tagged to this term address the Fifteenth Amendment (U.S. constitutional voting rights). Those entries are not relevant to the fiscal and parliamentary law meaning of FIFTEENTHS. Researchers should treat those links as a false match generated by orthographic similarity, not substantive connection.
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