“Per stirpes” in a will is a Latin phrase meaning “by branch.” It tells the probate court that if one of your named beneficiaries dies before you do, that person’s share should pass down to their own children and grandchildren rather than being split among your surviving beneficiaries. The designation keeps each family line intact, so no branch of your descendants gets accidentally written out.
How the Distribution Actually Works
A worked example makes the mechanics clear. Say your estate is worth $900,000 and your will leaves everything in equal shares, per stirpes, to your three adult children: Alex, Ben, and Chris. Alex dies before you, leaving behind two children of his own, David and Emily.
At distribution, the estate splits into three equal shares at your children’s generation. Ben receives $300,000. Chris receives $300,000. Alex’s $300,000 does not get redistributed to his siblings. Because of the per stirpes designation, his share drops to his descendants: David and Emily each inherit $150,000.
If Emily had also died before you, leaving a child named Frank, David would still receive $75,000 (half of Alex’s $300,000) and Frank would receive the other $75,000 that would have gone to Emily. The principle repeats at each level. A deceased person’s share always flows to their own descendants.
When a Branch Has No Survivors
Per stirpes only operates when the deceased beneficiary left descendants who are still alive. If Alex had died without any surviving children or grandchildren, his branch would receive nothing, and his $300,000 would be redistributed among the remaining branches. Ben and Chris would each receive $450,000. This is the one scenario in which per stirpes produces the same result as if you had never named Alex.
Traditional Per Stirpes vs. Modern Per Stirpes
Two versions of per stirpes are used across the country, and the specific language in your will can produce different results.
Traditional per stirpes, sometimes called the English method, always divides the estate at the children’s generation, even if no children are still alive. Each child who is living or who left living descendants gets a share. Grandchildren from different branches can end up with unequal amounts.
Modern per stirpes, also called modified per stirpes or distribution “by representation,” starts the division at the first generation that has at least one living member. If all your children have died but your grandchildren survive, the estate splits equally among the grandchildren rather than tracing back through each child’s branch.
The difference only shows up when every member of the first generation has died. Suppose both Alex and Chris predecease you, Alex leaving two children and Chris leaving one. Under traditional per stirpes, Alex’s two children split his one-third share ($150,000 each) and Chris’s single child receives Chris’s full one-third ($300,000). Under modern per stirpes, since the first generation with a living member is the grandchildren, the pooled shares are divided equally among the three grandchildren. Which version your state follows as the default varies, so the specific wording in your will matters.
How Per Stirpes Differs From Per Capita
Per capita means “by the head,” and it works on a different principle. Instead of preserving family branches, it counts each living beneficiary as an equal recipient.
Using the same family: if your will left your estate to your “then-living descendants, per capita,” the distribution would ignore branches. With Alex deceased, the living descendants are Ben, Chris, David, and Emily. The estate splits four ways at $225,000 each. Compare that to the per stirpes result, where Ben and Chris each received $300,000 and David and Emily each received $150,000.
Per capita appeals to people who want strict equality among all living descendants, but it means grandchildren dilute the shares of their aunts and uncles.
Per Capita at Each Generation
A third approach blends the two methods and serves as the default rule under the Uniform Probate Code. First, the estate is divided at the nearest generation to you that has a living member. Living members of that generation each take a share. Any leftover shares from deceased members of that generation who left descendants get pooled together and redistributed equally at the next generation down.
The result is that cousins at the same generational level receive equal amounts, even if their parents came from different branches. If Alex and Chris both predecease you, Ben takes his one-third. The remaining two-thirds get pooled and split equally among all surviving grandchildren, so Alex’s two children and Chris’s one child each receive an equal portion of that pool.
Who Counts as a Descendant
When a will directs a share to a beneficiary’s “descendants,” the question of who qualifies becomes important. In virtually every state, adopted children are treated identically to biological children for inheritance purposes. Once the adoption is finalized, the child has the same legal standing as a biological child and inherits through the adoptive family line, including per stirpes distributions from adoptive grandparents and other relatives.
Finalized adoption typically severs inheritance rights from the biological parents. An adopted child generally cannot inherit through a biological parent’s per stirpes chain unless the biological parent names them specifically in a will. Stepchildren who were never formally adopted usually have no automatic inheritance rights at all, which catches many blended families off guard. If you want stepchildren included in a per stirpes distribution, you need to name them explicitly or legally adopt them.
What Happens if Your Will Doesn’t Say Per Stirpes
If a will leaves property to someone who has already died and says nothing about where that share should go, the gift is considered “lapsed.” Every state has an anti-lapse statute that supplies a default rule, generally redirecting the lapsed share to the deceased beneficiary’s own descendants. The result often looks like per stirpes.
Anti-lapse protection only applies if the deceased beneficiary was closely enough related to you. Under the Uniform Probate Code model that many states follow, the beneficiary must be a grandparent, a descendant of a grandparent, or a stepchild. A gift to an unrelated friend who predeceases you gets no anti-lapse protection and typically falls into the residuary clause or passes through intestacy. The exact relationship requirements vary by state. Some apply anti-lapse only to children and siblings; others extend it to any blood relative.
Relying on these defaults is a gamble. A will that spells out per stirpes removes the ambiguity.
The 120-Hour Survival Rule
A related issue arises when a beneficiary dies shortly after you rather than before. Nearly every state has adopted a version of the Uniform Simultaneous Death Act, which treats a person who dies within 120 hours of the decedent as having predeceased them. For per stirpes purposes, a beneficiary who dies within five days of you is treated the same as one who died first: the share flows down to their descendants.
Disclaimers
A living beneficiary can voluntarily refuse their inheritance through a formal process called a qualified disclaimer. Under federal tax rules, a qualified disclaimer causes the property to be treated as though it was never transferred to the person disclaiming it.1eCFR. 26 CFR 25.2518-1 – Qualified Disclaimers of Property; In General Under most state laws, the disclaiming person is treated as having predeceased the person who left them the inheritance.2eCFR. 26 CFR 25.2518-2 – Requirements for a Qualified Disclaimer If your will leaves your estate to your three children per stirpes and one child disclaims, that child’s share passes to their own children just as it would if they had died.
Making Per Stirpes Stick Across Your Estate
A per stirpes clause in a will is straightforward to draft. A typical residuary clause reads: “I give the residue of my estate to my then-living descendants, in equal shares, per stirpes.” For a specific gift: “I give my home to my son, John Smith, but if he does not survive me, then to his descendants, per stirpes.”
The will is only one piece of the puzzle. Retirement accounts like IRAs and 401(k)s, life insurance policies, annuities, and payable-on-death bank accounts all pass to whoever is named on their beneficiary designation forms, regardless of what your will says. If your will specifies per stirpes but your IRA form just lists your children by name with no contingency, a child’s death before yours could send that account somewhere you never intended.
Most financial institutions and insurance companies accept per stirpes designations on their beneficiary forms. Checking “per stirpes” or writing it next to a beneficiary’s name directs the account custodian or insurer to send that person’s share to their descendants if they predecease you.3National Association of Insurance Commissioners. Life Insurance Beneficiaries – Per Capita vs. Per Stirpes Not every institution accepts the designation. Federal Employees’ Group Life Insurance, for instance, does not allow per stirpes designations at all.4U.S. Office of Personnel Management. What Is a Per Stirpes Designation? Can I Use One When Designating Beneficiaries for My FEGLI Life Insurance? If a form will not accept per stirpes, name contingent beneficiaries explicitly so the proceeds don’t default to your estate and get tangled in probate.
If your family includes adopted children, stepchildren, or blended dynamics, the generic word “descendants” may not capture everyone you intend. Naming individuals alongside the per stirpes designation gives you the most control, and an estate planning attorney can make sure the will and your beneficiary forms work together rather than contradicting each other.