Most people believe their will controls who inherits their money. They have an attorney draft a careful document, sign it before witnesses, store it somewhere safe, and assume the matter is settled.
For a sizable portion of their assets, they are wrong.
Retirement accounts, life insurance policies, annuities, transfer-on-death bank accounts, and many investment accounts pass not by your will but by beneficiary designation — the name you wrote on a form, often years ago, often without thinking about it. These designations override your will. Always. Even when the will is more recent. Even when it explicitly contradicts them.
This is one of the most consequential, and most overlooked, parts of an estate plan.
How Beneficiary Designations Actually Work
When you opened your 401(k), bought a life insurance policy, or set up an IRA, the application asked you to name a beneficiary. That name became part of a contract between you and the financial institution. The institution agreed: when you die, we will pay the assets in this account directly to whoever is on this form.
That contract operates outside the probate system. The probate court — which is what enforces a will — never touches these assets. They go to the named person, period.
This has two big practical implications.
First, the assets pass quickly. No waiting for the will to be admitted to probate, no executor delays, no court oversight. The beneficiary submits a death certificate and a claim form, and within weeks the money is theirs.
Second, your will cannot redirect them. If your will leaves "everything to my children equally" but your IRA still names your ex-spouse from twenty years ago, your ex-spouse gets the IRA. Courts have upheld this outcome in case after case, including a unanimous 2009 U.S. Supreme Court decision (Kennedy v. Plan Administrator) where a man's ex-wife inherited his entire pension because he forgot to update the form after the divorce.
What Passes by Beneficiary Designation
A surprising amount of the typical American household's wealth.
- 401(k)s, 403(b)s, and other employer retirement plans
- Traditional IRAs and Roth IRAs
- Life insurance policies (term and permanent)
- Annuities
- Health Savings Accounts (HSAs)
- Pensions that offer a survivor benefit
- Transfer-on-death (TOD) brokerage accounts
- Payable-on-death (POD) bank accounts
- 529 college savings plans (with successor account owner designations)
For households whose largest assets are a retirement account and a life insurance policy — which describes the median American family — the beneficiary form may control more wealth than the will does.
The Categories That Trip People Up
Primary vs. contingent. Every form has two slots. The primary is your first choice. The contingent inherits if the primary has died before you. People routinely fill in only the primary and leave the contingent blank — which means if both you and your primary die together, or your primary predeceases you, the asset reverts to your estate, where probate fees and delays apply.
"Per stirpes" vs. "per capita." If you name three children as primary beneficiaries and one predeceases you with kids of their own, per stirpes means the deceased child's share goes to their children. Per capita means it gets divided among the surviving siblings, and the grandchildren get nothing. Most people, asked plainly, want per stirpes. Most forms default to per capita.
Naming a minor child directly. Insurance companies and IRA custodians cannot pay assets directly to a minor. If the only beneficiary is a child under 18, the assets get tied up in court until a guardian is appointed — exactly the opposite of why you set up the designation. The fix is usually to name a trust for the minor's benefit, or an UTMA custodian.
Naming "my estate." This sounds clean — let the will sort it out — but it's almost always a mistake. It drags the asset into probate (slow, public, expensive), and for retirement accounts it can trigger compressed distribution rules that accelerate income tax for your heirs.
When You Need to Update Them
- Marriage or divorce — almost always. Some states automatically revoke designations naming an ex-spouse, but federal law (ERISA) preempts state rules for many retirement accounts, which is exactly how the Kennedy case was decided.
- Birth of a child or grandchild — to add them as a contingent.
- Death of a named beneficiary — to fill the empty slot.
- Change of trustee or major change in family circumstances.
- At least every five years as a default review, even if nothing has changed. Forms get lost, plans change administrators, and old designations from a job you left a decade ago may still be active.
A 2017 review by Vanguard found that roughly 1 in 4 retirement account holders had outdated or incomplete beneficiary information. The financial cost of that gap is paid not by the account holder, who is gone, but by the family left behind.
A Practical Plan
Take an afternoon. Make a list of every account and policy that could pay out at your death — retirement, insurance, HSA, brokerage, bank. For each one, log in or call the institution and confirm:
- Who is named as primary?
- Who is named as contingent?
- Is "per stirpes" elected?
- Are minors handled correctly (through a trust or UTMA)?
- Are the legal names spelled correctly and the relationships documented?
Save a copy of every confirmation. Tell the executor of your will where the list is.
This is unglamorous work. It is also one of the highest-leverage things you can do for the people you love. A two-page form, completed correctly, can save your family months of grief, thousands in legal fees, and a great deal of sorrow they should not have to bear.
The will is important. But the form is what most of your money will actually follow.
