You know that sinking feeling when an MBE question starts with “O conveys Blackacre to A and his heirs, but if the property is ever used for commercial purposes, then to B”? Your mind races through fee simple absolute, determinable, condition subsequent, executory limitation—and suddenly you’re guessing. Estates in land questions are testing machines on the MBE because they require you to decode language with surgical precision. One word changes everything.

Let me walk you through the framework that turns these questions from guesswork into points.

The Foundation: Fee Simple Absolute

Start here because it’s your baseline. A fee simple absolute is the largest estate recognized by law—unlimited duration, full ownership rights, freely transferable. It’s created by the simplest language: “to A” or “to A and his heirs.”

Here’s what matters for the MBE: If you see clean conveyance language with no strings attached, you’re looking at a fee simple absolute. No conditions. No limitations. No future interests lurking in the background. The analysis ends.

But the examiners rarely make it that easy.

The Defeasible Fees: Where the MBE Gets Tricky

Defeasible fees are fee simple estates with strings attached. They can terminate based on the occurrence (or non-occurrence) of some condition. The MBE loves these because the language distinctions are subtle, and the future interests that follow are different for each type.

Fee Simple Determinable

This estate automatically terminates when a stated condition occurs. The magic is in the durational language: “so long as,” “while,” “during,” or “until.”

Example: “O conveys Blackacre to the City so long as the property is used as a public park.”

What happens if the City builds a parking garage? The estate automatically reverts to O (or O’s heirs if O is dead). No lawsuit needed. No election required. Automatic.

The future interest that follows a fee simple determinable is a possibility of reverter, which stays with the grantor. This matters because possibilities of reverter are not subject to the Rule Against Perpetuities—a critical distinction when you’re sorting through answer choices.

Fee Simple Subject to Condition Subsequent

This one looks similar but operates differently. The estate may be terminated at the grantor’s election if a condition occurs. The language shifts to conditional terms with a carve-out for re-entry: “but if,” “provided that,” “on condition that,” followed by language giving the grantor a right to re-enter or reclaim.

Example: “O conveys Blackacre to the City, but if the property ceases to be used as a public park, O may re-enter and reclaim the property.”

The critical difference: The estate does not automatically terminate. It continues until the grantor affirmatively exercises the right of entry (also called a power of termination). If the City violates the condition but O does nothing, the City keeps the property.

On the MBE, watch for answer choices that confuse automatic termination with elective termination. The examiners know students mix these up under time pressure.

Fee Simple Subject to Executory Limitation

Now we add a third party to the mix. This defeasible fee automatically divests to someone other than the grantor when the condition occurs.

Example: “O conveys Blackacre to A, but if A uses the land for commercial purposes, then to B.”

If A opens a coffee shop, the property automatically shifts to B. The future interest is an executory interest, and here’s where it gets nasty: executory interests are subject to the Rule Against Perpetuities. If the condition might occur beyond a life in being plus 21 years, the executory interest is void.

This is a frequent MBE trap. You’ll see a facially valid executory limitation that violates the Rule, which means the condition is stricken and the estate becomes a fee simple absolute in the first grantee.

Life Estates: Measuring Duration by a Life

A life estate lasts for the duration of a designated life—usually the grantee’s, but not always. Created by simple language: “to A for life.”

Example: “O conveys Blackacre to A for life, then to B.”

A is the life tenant. A has the right to possess, use, and enjoy the property, including collecting rents and profits. But A cannot commit waste—and this is where the MBE tests you.

The Three Types of Waste

Voluntary waste is affirmative harm: tearing down structures, extracting minerals beyond permissible limits, clear-cutting timber (unless the land was used for timber before the life estate began). Life tenants are liable for this.

Permissive waste is neglect: failing to make ordinary repairs, not paying property taxes to the extent of income from the property, letting the place fall apart. Life tenants must maintain the premises in reasonably good repair.

Ameliorative waste is trickier. It’s technically unauthorized changes that increase property value—like renovating an old house in a now-upscale neighborhood. The modern trend permits ameliorative waste if it reflects changed conditions, but the traditional rule holds the life tenant liable even for improvements. The MBE often uses the traditional rule unless the fact pattern signals otherwise.

A life estate pur autre vie is measured by someone else’s life. “To A for the life of B” means A’s estate lasts as long as B lives. If A dies first, A’s heirs or devisees hold the estate until B dies. If B dies first, the estate terminates regardless of whether A is alive.

Future Interests: What Comes Next

Every time you spot a life estate or defeasible fee, ask: What future interest follows?

Reversions

A reversion is what the grantor keeps when conveying less than a fee simple absolute. “To A for life” creates a life estate in A and an automatic reversion in O. Reversions are vested, freely transferable, and not subject to the Rule Against Perpetuities.

Remainders

A remainder is a future interest in a third party that takes effect upon the natural termination of the preceding estate. It never cuts short the prior estate—it waits patiently.

“To A for life, then to B” gives B a remainder.

Remainders come in two flavors:

Vested remainder: Created in an ascertained person with no condition precedent other than the natural end of the prior estate. B’s remainder above is vested—B is identified, and there’s no condition blocking B from taking when A dies.

Contingent remainder: Either the person is unascertained (“to A for life, then to A’s children” when A has no children yet) or there’s a condition precedent (“to A for life, then to B if B graduates from law school”). Contingent remainders are subject to the Rule Against Perpetuities.

One nasty subcategory: vested remainder subject to open. “To A for life, then to A’s children.” If A has one child, that child has a vested remainder—but it’s subject to open because A might have more children who will share the estate. The class closes when any member is entitled to immediate possession (A dies) or under the rule of convenience.

Executory Interests

We covered these above with defeasible fees, but remember: an executory interest always divests someone. A shifting executory interest divests another transferee (“to A, but if B passes the bar, then to B”). A springing executory interest divests the grantor (“to A when A marries”).

Both are subject to the Rule Against Perpetuities, and both are MBE favorites because students forget to check the Rule.

Decoding MBE Fact Patterns: A Practical Approach

When you see a conveyance, work through this checklist:

  1. Identify the language: Durational (“so long as”) vs. conditional (“but if”) vs. clean conveyance.
  2. Classify the present estate: Fee simple absolute, determinable, condition subsequent, executory limitation, or life estate?
  3. Identify any future interests: Who holds them (grantor or third party)? What type?
  4. Check the Rule Against Perpetuities: Does any future interest potentially vest too remotely?
  5. Apply any special rules: Waste for life tenants, automatic vs. elective termination for defeasible fees.

Let’s apply this to a hypo:

“O conveys Blackacre to A for life, then to B if B survives A, otherwise to C.”

Now change one word:

“O conveys Blackacre to A for life, then to B’s children who reach age 25.”

If B has no children, or only children under 25, this is a contingent remainder subject to the Rule. Could a child of B reach 25 more than 21 years after the death of all lives in being at the conveyance? Yes—if B has another child after the conveyance, that child might not reach 25 within the perpetuities period. Under the common law Rule, the remainder to B’s children is void.

This is the level of precision the MBE demands.

What You Must Memorize

The MBE will not give you time to reason through these rules from first principles. You need instant pattern recognition:

If you’re looking for all these rules organized for active recall, FlashTables Real Property covers every estates and future interests rule in a two-column format that makes the distinctions crystal clear. The side-by-side structure is particularly helpful here because you can compare fee simple determinable vs. condition subsequent vs. executory limitation on a single page—exactly what you need when you’re drilling these under timed conditions.

Final Takeaway

Estates in land questions reward precision. The examiners are testing whether you can decode conveyance language, classify estates correctly, identify future interests, and apply the Rule Against Perpetuities without hesitation. Master the language triggers—“so long as” vs. “but if” vs. clean conveyance—and you’ll move through these questions with confidence instead of dread. The rules don’t change. The patterns repeat. Learn them cold, and you’ll bank points every time an estates question appears.