Per Stirpes vs. Per Capita: How One Latin Phrase Decides Whether Your Grandchildren Inherit

Your IRA beneficiary form has a checkbox you have probably never noticed. It sits next to each name you list, labeled with two Latin words — per stirpes or per capita — and most people skip right past it. That skipped checkbox quietly decides what happens if one of your beneficiaries dies before you do: under one option, their children step into their share; under the other, their share is redistributed to your surviving beneficiaries and their children get nothing.

This is not a corner case. Out-of-order deaths happen in ordinary families all the time, and the difference between these two elections can redirect hundreds of thousands of dollars. Here is what each one does, where the choice appears, and how to make sure your forms say what you actually mean.

What Per Stirpes Means: Inheritance "By Branch"​

Per stirpes is Latin for "by branch" or "by roots." When you leave something to your beneficiaries per stirpes, you are dividing it by family branch: if a beneficiary dies before you, that beneficiary's share flows down their own branch of the family tree to their descendants.

Picture a parent with two children, each of whom has two children of their own. One child dies before the parent. Under a per stirpes distribution:

• The surviving child receives their full half.
• The deceased child's half is split evenly between that child's two children — the parent's grandchildren each receive a quarter.

The branch is preserved. Every line descending from the original beneficiary keeps exactly the share that beneficiary would have received. Two details matter:

• Spouses are not included. Per stirpes follows bloodline descent — children, grandchildren, great-grandchildren. A deceased beneficiary's surviving spouse does not step into the share under this rule.
• It only activates on an out-of-order death. If all your named beneficiaries outlive you, per stirpes changes nothing: each receives exactly the share you named. The election is purely a contingency plan.

What Per Capita Means: Inheritance "By Head"​

Per capita means "by the heads." When you leave something per capita, the assets are divided equally among the surviving individuals in the named group. If a beneficiary dies before you, their share lapses back into the pot and is re-divided among whoever is left.

Take the same family — two children, one of whom predeceases the parent, leaving two children of their own. On most account beneficiary forms, per capita means the deceased beneficiary simply drops out and the surviving named beneficiaries split everything: the surviving child receives the entire account, and the deceased child's children receive nothing.

That is the stark version, and it is the one that surprises families. In will-drafting there is a related variant worth knowing: some per capita distributions include the next generation as equal takers, so the surviving child and the two grandchildren would each receive a third. The wording on your specific document controls which version applies — one more reason to read the form rather than assume.

The Two Options Side by Side​

Assume your IRA names your two children as equal beneficiaries, and one of them dies before you, leaving two children.

Same account, same family, same tragedy — and the grandchildren's inheritance swings from half the account to zero based on one checkbox. Neither answer is inherently right. If your priority is keeping each branch of the family equally provided for, per stirpes does that. If your priority is that only the people you personally named ever receive the money, per capita does that. The mistake is not choosing one or the other; the mistake is leaving the election blank and letting a custodian's default choose for you.

Where This Choice Actually Appears​

These phrases show up in more places than most people realize, and each document makes its own independent election:

• Wills and trusts. The classic setting. Standard phrasing is "to my descendants, per stirpes" — the words "descendants" or "issue" must appear for the clause to work as intended.
• IRA beneficiary forms. Most major custodians include a per stirpes / per capita election per beneficiary — sometimes a checkbox, sometimes a dropdown, sometimes a blank line where you write the words in yourself.
• 401(k) and other employer plans. Some plans allow per stirpes designations; others do not offer the option at all, in which case a deceased beneficiary's share typically passes to your contingent beneficiaries or back to the plan's default order. Check your plan's form rather than assuming the IRA rules carry over.
• Life insurance and annuities. Many carriers support per stirpes language on the beneficiary designation, either as a printed option or as a write-in.
• Payable-on-death and transfer-on-death accounts. Bank and brokerage TOD designations sometimes offer the election; many do not.

The critical point: each form stands alone. Electing per stirpes in your will does nothing for your IRA, because the IRA passes outside your will entirely. You must make the election separately on every account that offers it.

The Fine Print: State Defaults and "Per Capita at Each Generation"​

If you die without a will, you do not get to choose — your state's intestacy statute chooses for you, and states disagree with each other. Some states distribute intestate estates per stirpes (strictly by branch, divided at the child level). Others use a system called per capita at each generation, associated with the Uniform Probate Code: shares are pooled at the nearest generation with a living member, and everyone in the same generation takes equally. The two systems produce different numbers whenever survivors span more than two generations.

This matters in a second, subtler way: the same Latin words can be interpreted differently depending on when and where your documents were executed. A few states have statutes redefining what "per stirpes" or "by representation" means for instruments signed after a certain date. You do not need to memorize any of this. The practical takeaway is narrower: if your estate plan is more than a few years old, or if you moved states since signing it, have a local estate attorney confirm your documents still mean what you think they mean.

How to Elect Per Stirpes on Your Accounts​

The mechanics are unglamorous, which is exactly why they get skipped. For each account that passes by beneficiary designation:

1. Pull the current designation for every account. Log in to each custodian — IRAs, 401(k)s, life insurance, annuities, TOD accounts — and look at what the form actually says today, not what you remember saying when you opened the account decades ago.
2. Find the distribution-method option. Look for a checkbox, dropdown, or write-in line next to each beneficiary's name. If the form has no such option, write "per stirpes" next to the beneficiary's name if the custodian accepts write-ins — many do — or ask the custodian for its per stirpes addendum form.
3. Name contingent beneficiaries. Per stirpes handles the case where a beneficiary's descendants should step in. Contingent beneficiaries handle the case where an entire branch is gone. You need both: if a beneficiary dies leaving no descendants, someone still has to be next in line, or the account falls into your estate and through probate.
4. Confirm it in writing. After submitting, request the custodian's confirmation of the designation on file. Custodians process thousands of these forms, and a checkbox that did not scan is the same as a checkbox you never checked.

Five Mistakes That Send Money to the Wrong Person​

1. Assuming your will overrides your beneficiary forms​

It does not — it is the other way around. Assets with a valid beneficiary designation pass directly to the named person, entirely outside your will and outside probate. You can rewrite your will to leave everything to your children, but if your IRA form still names your sibling from thirty years ago, your sibling inherits the IRA. Every estate planner has a story about the ex-spouse who inherited a 401(k) because nobody updated the form after the divorce.

2. Leaving the per stirpes / per capita election blank​

On many forms this field is optional, so it stays empty — and then the custodian's default provision decides. Defaults vary: some custodians treat a blank election as per capita among survivors, others apply per stirpes. "Whatever the default is" is not an estate plan. Make the election explicitly on every form.

3. Naming beneficiaries once and never reviewing them​

Marriage, divorce, births, deaths, a child developing creditor problems or a disability that needs a special-needs trust — every one of these can obsolete a designation. Review every beneficiary form on the same schedule as the rest of your estate plan, at minimum every two to three years and after every major life event.

4. Naming minor children outright​

A minor cannot directly receive a large account. Without a trust or custodial arrangement, the court appoints a guardian to manage the money — an expensive, supervised process — and the child receives the full balance at the age of majority with no strings attached. If per stirpes could route money to young grandchildren, pair the election with a trust that receives their shares instead.

5. Expecting one document to cover everything​

Your will, your IRA, your 401(k), your life insurance, and your TOD accounts each carry their own designation, each with its own per stirpes election — or none. Coordinating them is the actual job. A per stirpes election in the will while the IRA (often the largest asset) sits on a stale per capita default is the most common mismatch.

Which Should You Choose?​

Start from what you want to be true the day after an out-of-order death:

• Choose per stirpes when you want each branch of the family treated equally no matter what — the standard choice for parents leaving assets to children, where cutting out a deceased child's family would feel like punishing grandchildren for their parent's death.
• Choose per capita when you want only the specific people you named to receive the money — for example, leaving an account to siblings with no interest in passing shares to nieces and nephews, or when the named beneficiaries are friends rather than family branches.
• Name a trust instead when control matters more than either default: minor or young-adult takers, a beneficiary with creditor exposure or means-tested benefits, or a blended family where "equal branches" needs custom definition. The trust document then contains its own distribution scheme, and the account form simply names the trust.

None of this is a substitute for counsel on a large or complicated estate. But for the ordinary case — retirement accounts passing to children — an explicit per stirpes election plus named contingents covers the scenario most families actually face.

Keeping the Paper Trail in Your Books​

Beneficiary designations are records before they are legal instruments: a dozen accounts, each with its own form, its own election, and its own last-reviewed date. Keep a master register — account, custodian, primary beneficiaries, per stirpes or per capita election, contingent beneficiaries, date last confirmed — alongside your financial records and review it with the rest of your estate plan. The register itself has no legal force; its job is to make staleness visible before it becomes a surprise.

On the bookkeeping side, inheritances also create tracking work for the recipient. An inherited traditional IRA keeps its own identity — its distributions are taxable income to you, and under current law most non-spouse beneficiaries must empty it within ten years. Recording the account separately from your own retirement savings keeps the required distributions visible:

2026-01-15 open Assets:Retirement:Inherited-IRA:Vanguard
2026-01-15 open Income:Inherited-IRA-Distributions
 
2026-03-02 * "Year 1 distribution from inherited IRA"
  Assets:Checking:Main                            18500.00 USD
  Assets:Retirement:Inherited-IRA:Vanguard       -18500.00 USD
 
2026-03-02 * "Taxable portion of inherited IRA distribution"
  Expenses:Taxes:Federal-Withheld                  3700.00 USD
  Income:Inherited-IRA-Distributions               -3700.00 USD

Separate accounts, separate income postings: when the ten-year clock forces a distribution schedule, your books already show what arrived and what was withheld, instead of burying it in one commingled retirement balance.

Your Next Step​

Log in to your largest beneficiary-designated account today — for most readers, the IRA or 401(k) — and check two things: whether the named beneficiaries are still the people you want, and whether the per stirpes election is made explicitly. Then work down the list to every other account. The whole review takes an afternoon; the checkbox it fixes decides where a lifetime of savings goes.