How to Actually Solve Perpetuities Problems Without Losing Your Mind
The Rule Against Perpetuities shows up on every property exam and in more closing objections than anyone cares to count. Most people fail because they try to apply it mechanically instead of understanding what the rule is actually testing. Here is how you approach it. Start with the measuring lives. Before you write a single word about contingencies, scan the conveyance for any person alive at creation whose life affects whether the interest vests. These are your measuring lives. If you miss one, everything downstream is wrong. I once spent forty-five minutes on a bar question because I overlooked a cousin who was mentioned in passing in the fourth sentence of the facts. The interest failed because cousin Margaret was the only measuring life that mattered, and she was a minor. The vesting could have happened decades after her death. The answer was straightforward once I identified her. The test itself is simple but easy to botch in application. An interest must vest, if at all, within twenty-one years of the death of some life in being at the time of creation. Not might vest. Must vest. If there is any possible scenario, however unlikely, where vesting occurs outside that window, the interest is void ab initio. The hypothetical method is everything here. You do not look at what actually happens. You ask whether it is possible that something could happen to violate the rule.
Consider this standard pattern: to A for life, then to A's children who reach age twenty-five. The class of A's children is the contingent remainder. A is the life in being. But A might have a child after A's death, through artificial reproduction or adoption, and that child would not be a life in being. That child could reach twenty-five more than twenty-one years after A's death. The interest fails entirely, even though in the real world A already has three adult children and no more kids are expected. Courts do not care about expectations. They care about possibility. The exception that trips people up is the two-step vesting problem. When you have a condition like reaching a certain age over twenty-one, the rule requires you to consider whether any possible member of the class could satisfy the condition outside the permissible period. A gift to grandchildren who reach twenty-one is typically valid because every grandchild is a life in being and will reach twenty-one within twenty-one years of their own death. But a gift to grandchildren who reach twenty-five is invalid because a grandchild could survive past the measuring lives plus twenty-one years and still hit twenty-five later. Another trap is the springing executory interest disguised as a shifting one. Look at: to A, but if B marries C, then to D. A's fee simple is subject to an executory interest in D. B is a life in being. But what if B never marries C? Then D's interest never vests, and A keeps the estate forever. The issue is whether D's interest violates the rule at creation. If B could theoretically not marry C until well beyond the permissible period, the executory interest is void. In practice, courts sometimes save these by construing the condition differently, but on an exam, you should flag the problem and move on.
The uniform statutory reform is worth knowing because most jurisdictions have adopted something like it. The wait-and-see approach changes the analysis from hypothetical possibility to actual events. Instead of striking down an interest because it might vest too remotely, you wait and see whether it actually does. Under the Uniform Statutory Rule Against Perpetuities, an interest is valid if it actually vests within ninety years from creation, regardless of measuring lives. This is a massive shift and it means practice problems in reform jurisdictions look completely different from traditional ones. If your exam specifies a jurisdiction, check whether it uses the common law rule or a statutory version before you begin. Here is a practical technique I use. Draw a timeline. Mark the creation date. Mark the death of every life in being. Extend twenty-one years from the last death. Place the vesting condition on that timeline. If the earliest possible vesting falls after your line, the interest is void. This visual method eliminates about eighty percent of mistakes I see students make. It forces you to confront the worst-case scenario instead of assuming the facts as written will play out conveniently. A counter-intuitive point that barely gets covered: the rule applies to options and rights of first refusal, not just traditional future interests. A right of first refusal granted to a non-life-in-being can violate the rule if it might be exercised too remotely. Some courts apply a twenty-one year limit from the creation of the option. Others invalidate it outright. Check your jurisdiction's treatment because this area is not uniform.
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The charitable exception is another thing you need to memorize but rarely use correctly. Gifts to charities or charitable classes are exempt from the rule. So is a gift from one charity to another. But a gift to a charity followed by a gift over to a non-charity is not exempt. The second interest still must comply. Students routinely miss this distinction and either strike down valid interests or save invalid ones. One limitation I have found with practice problems is that they tend to over-narrow the fact patterns. Real transactions are messier. Multiple contingencies stack on top of each other. Class gifts include after-born members. Contingencies reference events that might never occur. Practice problems usually isolate one issue at a time, which is fine for studying but gives you a false sense of confidence. The real test is when you encounter a deed with five different future interests and you have to determine which ones survive and which do not. If you want to practice, look for problems that involve class gifts with age conditions, executory interests following defeasible fees, and options coupled with interests. Those are the patterns that appear most often and the ones where students lose the most points. Avoid problems that are pure memorization of exceptions. Those are less useful unless you are studying for a jurisdiction-specific exam.
I recommend working through at least twenty problems before you consider yourself competent. The first ten will feel slow and frustrating. By number twenty, you will start recognizing patterns automatically. You will see the measuring lives before you even finish reading the facts. That is the goal. Not memorization. Pattern recognition. There is no shortcut around actually doing the work. Reading explanations of perpetuities problems gives you the illusion of understanding without giving you the ability to solve them under time pressure. Sit down with a blank page. Read the facts. Identify the interests. Identify the measuring lives. Apply the test. Check your work against the answer. Repeat until the process is automatic.
