Estates in Land and Future Interests: A 1L Property Map

Future interests are the unit that makes 1L Property feel like a foreign language. The way through is a two-step habit: first name the present possessory estate someone holds right now, then ask what happens to the property when that estate ends. Every future interest is just the answer to "what happens next?"

This guide maps the present estates, the future interests that follow them in the grantor, and the future interests that follow them in a third party — then gives you a method for parsing any conveyance.

Fee simple absolute is complete ownership with no future interest attached — "to A" or "to A and her heirs." Nothing follows it. The interesting estates are the ones that can end.

A fee simple determinable ends automatically when a stated event occurs. It uses durational language — "so long as," "while," "during," "until." "To A so long as the land is used as a library" gives A a fee simple determinable.

A fee simple subject to condition subsequent does not end automatically; the grantor must act to retake the land. It uses conditional language — "but if," "provided that," "on condition that" — together with a reserved right to re-enter. "To A, but if liquor is ever sold on the land, the grantor may re-enter" is the classic form.

A fee simple subject to an executory limitation ends automatically and passes to a third party (not the grantor) when the event occurs. A life estate lasts for the measuring life — "to A for life" — and may be measured by another's life (pur autre vie, "to A for the life of B"). A life tenant is bound by the doctrine of waste, which limits damage to the future holder's interest.

When the grantor holds back the future interest, there are exactly three possibilities, and each pairs with a specific present estate.

A reversion is what remains when a grantor transfers less than they own without giving away the rest — most often after a life estate. "To A for life" leaves the grantor a reversion in fee simple.

A possibility of reverter follows a fee simple determinable; it springs back to the grantor automatically when the durational event happens. A right of entry (also called a power of termination) follows a fee simple subject to condition subsequent and must be expressly reserved — and unlike the possibility of reverter, it does not operate automatically; the grantor must exercise it.

When the future interest goes to someone other than the grantor, it is either a remainder or an executory interest, and telling them apart is the heart of the unit.

A remainder waits politely: it becomes possessory at the natural end of the prior estate, usually a life estate, without cutting it short. Remainders split into vested and contingent. A vested remainder is held by an ascertained, identifiable person and is not subject to any condition precedent — "to A for life, then to B" gives B a vested remainder. A contingent remainder is held by an unascertained person or is subject to a condition precedent — "to A for life, then to B if B has graduated law school" gives B a contingent remainder.

An executory interest does not wait politely — it cuts short (divests) a prior estate. A shifting executory interest divests another transferee; a springing executory interest divests the grantor. Executory interests are what follow a fee simple subject to an executory limitation.

Vested remainders come in three flavors worth knowing. An indefeasibly vested remainder is certain to become possessory and cannot be taken away — "to A for life, then to B" where B is alive and identified.

A vested remainder subject to open is a class gift where at least one member is identified but more could still join — "to A for life, then to A's children," when A already has one child but might have more. A vested remainder subject to complete divestment is certain as to its holder but could be eliminated by a stated condition that follows it.

Take "O conveys to A for life, then to B and her heirs." Step one, the present estate: A has a life estate. Step two, what happens next: at A's death the land goes to B, an ascertained person with no condition attached, so B holds an indefeasibly vested remainder in fee simple. O keeps nothing.

Now "O conveys to A so long as the premises are used as a farm." A has a fee simple determinable (durational "so long as"); O keeps a possibility of reverter. Change the wording to "to A, but if the premises stop being used as a farm, O may re-enter," and A now has a fee simple subject to condition subsequent with O holding a right of entry — the difference is automatic termination versus a power O must choose to exercise.

The Rule Against Perpetuities (RAP) polices how long a contingent future interest can stay unresolved. The common-law statement: no interest is valid unless it must vest, if at all, no later than 21 years after the death of some life in being at the creation of the interest.

RAP targets contingent remainders, executory interests, vested remainders subject to open, and certain options — not future interests retained by the grantor (reversions, possibilities of reverter, rights of entry) or indefeasibly vested remainders. Many states have softened the common-law rule through reforms such as wait-and-see and the Uniform Statutory Rule Against Perpetuities (a 90-year period). This is the high-level map; the validating-life analysis is its own deep topic.

The single most-tested distinction here is fee simple determinable versus fee simple subject to condition subsequent. Determinable estates use durational words ("so long as," "until") and end automatically, leaving the grantor a possibility of reverter. Condition-subsequent estates use conditional words ("but if," "provided that"), do not end on their own, and leave the grantor a right of entry that must be exercised.

Read the granting language closely: the difference between automatic reversion and an optional power to re-enter often turns on a single phrase, and it changes who owns the land the moment the condition occurs.