Per Stirpes vs. Per Capita: The Default That Disinherits Your Grandchildren

What Per Stirpes Means

Per stirpes is a Latin term meaning "by the branch" or "by the roots." When assets are distributed per stirpes, the estate is divided into equal shares based on the number of branches at the first generation of beneficiaries. If a beneficiary in that generation has already died, their share does not disappear — it passes down to their own descendants.

Consider a parent with three children: Alice, Bob, and Carol. The parent's estate is worth $900,000 and is to be divided equally among the three children, per stirpes. If all three children survive the parent, each receives $300,000. But if Bob dies before the parent, Bob's $300,000 share passes down to Bob's two children — each grandchild receives $150,000. Alice and Carol still receive $300,000 each. The family branch is preserved.

This is the result most families intend. The share follows the bloodline. The grandchildren step into their deceased parent's shoes.

What Per Capita Means

Per capita means "by the head." When assets are distributed per capita, only the living beneficiaries at the designated level receive a share. If a beneficiary has died, their share is redistributed among the surviving beneficiaries rather than passing to their descendants.

Using the same scenario — a parent with three children and a $900,000 estate distributed per capita — if Bob dies before the parent, the estate is divided equally among the two surviving children. Alice receives $450,000. Carol receives $450,000. Bob's children — the grandchildren — receive nothing.

This is the result that shocks most families. The grandchildren are effectively disinherited, not because anyone intended it, but because the form defaulted to per capita and nobody changed it.

The Flowchart Scenario Every Family Should Walk Through

The easiest way to understand the per stirpes vs per capita distinction is to walk through a concrete scenario with a simple family tree.

The family: A parent has three children — Alice, Bob, and Carol. Bob has two children of his own (the grandchildren). The parent's $900,000 estate is divided equally among the three children.

If all three children survive: Both per stirpes and per capita produce the same result. Each child receives $300,000. The distribution method only matters when someone dies first.

If Bob dies before the parent (per stirpes): Alice gets $300,000. Carol gets $300,000. Bob's two children each get $150,000. Total distributed: $900,000. Every branch of the family is represented.

If Bob dies before the parent (per capita): Alice gets $450,000. Carol gets $450,000. Bob's two children get nothing. Total distributed: $900,000. One branch of the family is erased.

Most Forms Default to Per Capita

This is the critical point that catches families off guard. The majority of beneficiary designation forms — for life insurance policies, retirement accounts, bank accounts, and investment accounts — default to per capita distribution unless the account holder specifically elects per stirpes.

Many forms do not even mention per stirpes as an option. They simply ask for beneficiary names and percentages. When a named beneficiary dies and no contingent beneficiary is listed, the default rule at most financial institutions is per capita: the deceased beneficiary's share is split among the surviving named beneficiaries.

Some forms include a checkbox for "per stirpes" or "by representation." Others require the account holder to write the words "per stirpes" next to each beneficiary's name. The specific method varies by institution, which is why reviewing every beneficiary form — and confirming the distribution method in writing — is essential.

Per Stirpes by Representation: A Third Option

Some states and institutions recognize a variation called "per capita at each generation" or "per stirpes by representation." Under this method, the assets are divided equally at the first generation where there are living descendants, and then the remaining shares are pooled and redistributed equally at the next generation.

In the scenario above, per capita at each generation would produce the same result as per stirpes when only one child predeceases. But in more complex scenarios — where multiple children predecease and leave different numbers of grandchildren — the results can differ. Families with complex family trees should work with an attorney to specify exactly which method they intend.

How to Specify Per Stirpes on Every Form

The fix is straightforward but requires diligence. For every beneficiary designation form — life insurance, 401(k), IRA, bank account, brokerage account — the account holder should write "per stirpes" after each beneficiary's name or check the per stirpes box if one exists.

The designation should read something like: "To my children, Alice Smith, Bob Smith, and Carol Smith, in equal shares, per stirpes." If the form does not have a per stirpes option, the account holder should contact the institution to ask how to add the designation, or attach a written addendum specifying per stirpes distribution.

The same language should appear in the will and in any trust documents. Consistency across all documents and forms prevents conflicting instructions and ensures the family's intent is honored regardless of which asset is being distributed.

The Bottom Line

Per stirpes vs per capita is not a technicality — it is the mechanism that determines whether an entire branch of a family is included or excluded from an inheritance. Most beneficiary forms default to per capita, which means most families are one unexpected death away from accidentally disinheriting their grandchildren. The solution is simple: review every beneficiary designation form, specify per stirpes on each one, and confirm the same language appears in the will and trust. Two Latin words, written in the right place, protect every branch of the family tree.