Per Stirpes vs Per Capita Beneficiary Designation

When a named beneficiary dies before the account owner, the account’s assets don’t automatically go to that beneficiary’s heirs—the distribution method depends on whether the owner chose per stirpes or per capita. These two approaches produce drastically different outcomes for a family.

The fundamental difference

Per stirpes and per capita are two competing formulas that answer a single question: if a beneficiary named in your will or on a financial account dies before you do, who gets that person’s share?

Under per stirpes (Latin for “by the branch”), the deceased beneficiary’s share passes down to their descendants—children, grandchildren, and so on—as if the deceased beneficiary were still alive. Think of a family tree: each branch keeps its original share and redistributes internally. If you name your three children as equal beneficiaries and your eldest child dies before you, leaving two children of her own, that branch still gets one-third of your estate, but it’s split between your two surviving children and two grandchildren.

Under per capita (Latin for “by the head”), the deceased beneficiary’s share does not pass to their heirs. Instead, it reverts to the surviving beneficiaries and is divided among them equally. Using the same example: if you die and your eldest child has predeceased you, only your two surviving children split the entire estate, even though your deceased child left heirs.

Why the distinction matters in practice

The practical stakes are enormous. Imagine you leave $300,000 to be divided equally among three children. One child dies before you, leaving two young grandchildren.

Under per stirpes: Your two surviving children each receive $100,000. The $100,000 that would have gone to your deceased child is divided between your two grandchildren ($50,000 each). Total: your deceased child’s branch still captures one-third of the estate, now split among three people.

Under per capita: Your two surviving children each receive $150,000. Your grandchildren receive nothing. Your deceased child’s branch forfeits its share entirely.

For families where you want to ensure assets stay within each family line (particularly in blended families or where some branches have more beneficiaries than others), per stirpes preserves the original intent. For situations where you want only currently living beneficiaries to receive assets, per capita ensures no descendants of a deceased beneficiary inherit.

Where per stirpes is the default

Many states default to per stirpes in wills and trusts unless you explicitly state otherwise. The reasoning is intuitive: if you wanted to benefit your child’s family, you probably wanted to benefit your grandchildren if that child predeceased you. Federal law also leans per stirpes for 401k-plan and IRA beneficiary designations in many contexts, though the rules vary.

However, the beneficiary designation form on your account (whether it’s a brokerage account, bank account, or life insurance policy) controls those assets outside your will or trust. Many financial institutions default to per capita on their forms, meaning you must actively request per stirpes if you want it. This distinction is why it’s critical to review your beneficiary designation paperwork, not just your will.

Complications with multiple generations

The real complexity arises when you have multiple generations named or implied. If you name “my children, per stirpes” and a child dies, per stirpes kicks in naturally. But if you name “my children and grandchildren, per capita,” and a child dies, the surviving grandchildren of that deceased child typically receive nothing—only your two surviving children split the estate.

In some blended-family scenarios, naming specific individuals rather than categories (“my son John, my daughter Sarah, and my stepson Michael”) can be clearer than trying to design a multi-generational distribution formula. Courts often have to untangle whether “my children, per stirpes” was truly intended when a will uses ambiguous language.

Changing your designation

Most beneficiary forms allow you to update your election. If you named your spouse and adult children as equal beneficiaries under per capita, and later realize that if your spouse dies, you’d rather his share pass to his own adult children (your in-laws) rather than to your children, you can usually update the form to per stirpes. The same applies to trust documents: amending the distribution language from per capita to per stirpes (or vice versa) is a standard trust modification.

State law variation

While per stirpes is common in wills, state intestacy laws (rules governing what happens if you die without a will) don’t always follow the same default. Some states use per stirpes, others per capita, and some use a hybrid approach depending on the branch. If you’re relying on intestacy—which is almost never advisable—your state’s law determines the outcome. Written beneficiary designations and wills give you explicit control and override default rules.

The distinction also appears in ERISA qualified plans (such as 401(k)s), where federal law may impose per stirpes treatment or allow the plan document to specify per capita. Always verify what your specific plan document and beneficiary form actually say, rather than assuming.

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