Definition
A defeasible fee is a fee simple estate in land that can be terminated or divested upon the occurrence of a specified condition or event. The holder of a defeasible fee owns the property in fee simple — with the full bundle of ownership rights — but that ownership is not permanent. If the triggering condition occurs, the estate either automatically ends or becomes subject to termination at the election of another party, depending on the subtype.
A defeasible fee differs from a fee simple absolute only in this conditionality. The owner holds what looks and functions like full ownership, but a qualifying event written into the original grant can cut it short. The three recognized forms each achieve this result through distinct legal mechanisms and carry different consequences for how and when the defeasance occurs.
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Common Confusion
Defeasible fee is frequently confused with fee simple absolute, and its three subtypes are frequently confused with one another. A fee simple absolute carries no conditions and cannot be divested. A defeasible fee always carries some condition that can end or disturb ownership. The confusion among the subtypes — determinable, subject to condition subsequent, and subject to executory limitation — is among the most consequential distinctions in property law: it determines whether a future interest is a possibility of reverter, a right of entry, or an executory interest, each of which has different rules governing transferability, alienability, and in some jurisdictions, expiration by statute. Researchers who encounter "defeasible fee" without a subtype specified should treat the characterization as incomplete.
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Core Elements
Because the legal consequences of a defeasible fee depend entirely on which subtype is present, identification requires examining three things in the original grant:
1. THE CONDITION. What event or circumstance would trigger defeasance? The condition must be set out in the grant itself. Courts read durational language ("so long as," "while," "during") as creating a fee simple determinable, and conditional language ("but if," "provided that," "on condition that") as creating a fee simple subject to condition subsequent. The distinction is grammatical and formal, but the legal consequences differ sharply.
2. WHAT HAPPENS IF THE CONDITION OCCURS. Does the estate end automatically by operation of law, or must some party act to reclaim it? Automatic termination signals a fee simple determinable; a right to reclaim signals a fee simple subject to condition subsequent.
3. WHO HOLDS THE FUTURE INTEREST. If the grantor retains the future interest, it is either a possibility of reverter (determinable) or a right of entry/power of termination (condition subsequent). If the future interest passes to a third party, the arrangement is a fee simple subject to executory limitation, and the third party's interest is an executory interest.
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Recognized Forms
/SUBTYPES
FEE SIMPLE DETERMINABLE: The estate automatically ends when the stated condition occurs. Ownership reverts to the grantor (or grantor's heirs) by operation of law without any action required. The grantor's retained interest is called a possibility of reverter.
FEE SIMPLE SUBJECT TO CONDITION SUBSEQUENT: The estate does not end automatically when the condition occurs. Instead, the grantor (or grantor's heirs) acquires the right to re-enter and reclaim the property. Until the grantor exercises that right, the grantee's estate continues. The grantor's retained interest is called a right of entry or power of termination.
FEE SIMPLE SUBJECT TO EXECUTORY LIMITATION: The estate is defeasible in favor of a third party, not the original grantor. When the condition occurs, the estate shifts automatically to the named third party. The third party's future interest is an executory interest. This subtype is a creature of the Statute of Uses (1535) and was not available at common law before that.
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Why It Matters in Research
The primary research trap with defeasible fees is subtype misidentification in older sources. Bouvier and other historical dictionaries tend to treat "defeasible fee" as a single concept, illustrating it with examples that most modern analysts would classify specifically as a fee simple subject to condition subsequent or fee simple determinable. Researchers using nineteenth-century sources should not assume that the historical author made, or relied on, the subtype distinctions that modern property law treats as essential.
A second trap is jurisdictional variation in the treatment of possibilities of reverter and rights of entry. Many states have enacted statutes limiting the duration of these future interests or converting them into fee simple absolutes after a set period. A defeasible fee created in a deed or will generations ago may have already been extinguished by statute in the jurisdiction at issue — a result that would not appear in the instrument itself and must be checked against current state law.
Third, the Rule Against Perpetuities applies differently across subtypes. Possibilities of reverter and rights of entry were traditionally exempt from the Rule; executory interests were not. This distinction drove significant litigation and strategic drafting for centuries and explains why subtype identification matters not just conceptually but practically in older title chains.
In the Law Mind corpus, defeasible fees appear most heavily in property law materials, deed construction cases, and testamentary devise disputes. The encyclopedia entry at property_3 provides the doctrinal framework that corpus sources often assume without stating. Researchers working through historical title documents or will construction cases should use that entry as the structural baseline before approaching primary sources.
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Historical Dictionary Support
Bouvier's treatment of defeasible fee illustrates the historical approach clearly: the entry defines the concept through a testamentary example — devise to A, but if A dies without children then to B — and describes the estate as a fee simple "subject to be divested" on a contingency. This is functionally accurate, but Bouvier does not distinguish between the three modern subtypes. The example given (devise over to a third party on a condition) corresponds to what modern doctrine calls a fee simple subject to executory limitation, but Bouvier presents it as the paradigm case of defeasible fees generally.
This compression was common in nineteenth-century dictionaries, which tended to treat the defeasible fee as a unified category defined by its susceptibility to divestment, rather than as a family of distinct estates with different future interests and different rules. The modern tripartite classification — determinable, condition subsequent, executory limitation — reflects doctrinal refinement that post-dates most historical dictionary sources.
Bouvier's entry is useful for understanding how courts and practitioners of the era understood the concept, but researchers should not rely on it to distinguish among subtypes or to resolve questions about future interests that turn on those distinctions.
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Jurisdictional Note
Several states, including New York and California, have enacted statutes that modify the common law treatment of possibilities of reverter and rights of entry, imposing durational limits or requiring re-recording to preserve them. The Uniform Statutory Rule Against Perpetuities, adopted in various forms by many states, also affects executory interests following defeasible fees. The common law rules described above are not uniform across jurisdictions, and the subtype distinction can have different practical consequences depending on the state.
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Encyclopedia Cross-Reference
property_3: Estates in Land — Defeasible Fees (Determinable, Subject to Condition Subsequent, Subject to Executory Limitation) (The Law Mind Property Law Encyclopedia)
property_2: Estates in Land — Fee Simple Absolute (The Law Mind Property Law Encyclopedia)
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