What Is a Vested Remainder Subject to Open?
A vested remainder subject to open is a remainder held by a class of people — most often “children” or “grandchildren” — where at least one member is already ascertained and qualified to take, but the class hasn’t closed yet. Additional members can still join and dilute everyone’s fractional share.
This shows up constantly in estate planning and on the California Bar Exam whenever a grant runs to “the children of” someone who might have more children later. Getting the class-closing timing right is the difference between a clean answer and a missed issue.
Vested remainder subject to open, in one sentence: it’s a remainder vested in a class where at least one member is ascertained and entitled to take, but membership remains open to new arrivals — each of whom dilutes the existing members’ shares — until the class closes under the rule of convenience.
How the Interest Vests and Opens
Take a grant: “To Aunt Rosa for life, then to the children of Marco.” Before Marco has any children, the class is unascertained — nobody can take yet, so the grantor holds a reversion, and the future interest in the yet-unborn children is a contingent remainder. The moment Marco’s first child, Diego, is born, Diego holds a vested remainder subject to open: vested because Diego is ascertained and there’s no remaining condition precedent other than Rosa’s death, but “subject to open” because Marco might have more children who will each dilute Diego’s share.
The Rule of Convenience: When Does the Class Close?
The class closes automatically the moment any member can first demand possession — typically when the preceding estate ends, or earlier if the class-defining person (Marco, in the example) dies first, since a dead person can have no more children. A child born after that closing moment takes nothing, even if the property hasn’t physically been distributed yet.
- Rosa dies while Marco is alive and has two children, Diego and Elena → the class closes at Rosa’s death; Diego and Elena split the gift 50/50.
- A third child, Felipe, is born to Marco after Rosa’s death → Felipe is excluded entirely under the rule of convenience.
The Womb Rule
One important exception softens the closing line: a child who is conceived but not yet born at the moment the class closes is still included, on the theory that the child was within the grantor’s contemplation even before birth. A child conceived after the class closes is excluded, no matter how close in time.
Worked Example
A grants “to my daughter Renee for life, remainder to Renee’s grandchildren.” At the time of the grant, Renee already has two grandchildren through her son Caleb — Ana and Bea. Renee’s daughter, Julia, is pregnant when Renee dies. Julia gives birth two months after Renee’s death.
Who shares in the remainder?
Analysis: Renee’s death is the class-closing event under the rule of convenience — that’s when the grandchildren can first demand possession. Ana and Bea are already ascertained members. Julia’s child was conceived (in utero) before Renee’s death, so the womb rule pulls that child into the class even though the birth itself happened afterward. All three grandchildren — Ana, Bea, and Julia’s newborn — share the remainder equally, each taking a one-third interest.
The All-or-Nothing Rule Under RAP
Class gifts face a uniquely harsh version of the Rule Against Perpetuities. The question isn’t whether some members’ shares will vest in time — it’s whether every possible member’s share will vest within the perpetuities period. If even one hypothetical, not-yet-existing class member could vest too remotely, the entire class gift fails, even the shares of members who would clearly vest on time. California’s Uniform Statutory Rule Against Perpetuities, under Cal. Prob. Code § 21205, gives the whole class a second chance: if all shares actually vest within 90 years of creation, the gift survives even if it would have failed the traditional common-law worst-case test.
Vested Subject to Open at a Glance
| Feature | Before First Class Member Born | After First Member Born, Before Closing | After Class Closes |
|---|---|---|---|
| Interest type | Contingent remainder | Vested remainder subject to open | Vested remainder, indefeasible |
| New members can join? | N/A — no one ascertained yet | Yes — dilutes existing shares | No |
| Grantor holds | Reversion | None (divested) | None |
Common Mistakes
- Calling it contingent. Once at least one class member is ascertained, the remainder is vested — “subject to open” describes dilution risk, not contingency.
- Including children born after closing. The rule of convenience cuts off membership at closing, regardless of when the property is physically handed over.
- Forgetting the womb rule. A child conceived but not yet born at closing is still included — students often wrongly exclude every child not yet delivered.
- Skipping the all-or-nothing RAP test for class gifts. This is far harsher than ordinary RAP analysis: one remote potential member can void the entire gift, including shares that would vest in time.
FAQ
When does a class gift to “children” typically close?
Under the rule of convenience, it closes when any member can first demand possession — usually at the end of the preceding life estate, or earlier if the class-defining parent dies first and can have no more children.
Does a child conceived but not yet born at closing get a share?
Yes. The womb rule includes a child in utero at the moment of class closing, treating that child as within the grantor’s contemplation even though birth hasn’t yet occurred.
Can a class gift fail entirely under RAP even if most members clearly qualify in time?
Yes. The all-or-nothing rule voids the entire class gift if even one hypothetical member’s interest could vest too remotely — though California’s 90-year USRAP savings period under Cal. Prob. Code § 21205 may still rescue it.
Key Takeaways
- A vested remainder subject to open exists once at least one class member is ascertained, even though later-born members can still dilute shares.
- The rule of convenience closes the class automatically when any member can first demand possession — later-born members are excluded.
- The womb rule includes a class member conceived, but not yet born, at the moment of closing.
- The all-or-nothing rule under RAP can void an entire class gift over just one remote hypothetical member.
- California’s 90-year USRAP window (Cal. Prob. Code § 21205) can save a class gift that would otherwise fail the traditional common-law test.
This article is educational and is not legal advice. Consult a licensed California attorney about your situation.
Related guides
- the rule against perpetuities in California
- executory interests, shifting and springing
- modern rule against perpetuities reforms in California