This is one of the most common and most costly surprises in estate planning: a beneficiary designation is a legally binding instruction that sits outside your will, and it takes priority over it.
Certain accounts pass directly to whoever is named on the account's beneficiary form, bypassing probate and bypassing your will entirely. This applies to:
- Retirement accounts — 401(k)s, IRAs, and similar accounts transfer directly to the named beneficiary on file with the plan administrator or custodian.
- Life insurance policies — the death benefit goes to whoever is named on the policy, regardless of what any other estate document says.
- Payable-on-death (POD) bank accounts — a POD designation lets a bank account pass directly to a named person without going through probate.
Here's why that matters in practice: imagine you open a 401(k) at 25 and name a girlfriend, boyfriend, or first spouse as beneficiary. Years later you get divorced, remarry, and write a will leaving everything to your current spouse. If you never went back and updated that old 401(k) form, your ex could still legally inherit that account when you die — your will has no power to override it. This isn't a hypothetical edge case; it's one of the more common estate-planning mistakes, precisely because beneficiary forms are easy to fill out once and forget about.
Review beneficiaries after these events
- Marriage — add a new spouse where intended.
- Divorce — remove an ex-spouse from every account, not just the ones that feel obvious.
- Birth or adoption of a child — add them as a contingent beneficiary, or set up a trust to receive funds on their behalf while they're a minor.
- Death of a named beneficiary — update the form so the account doesn't default back into probate.
A good habit: check beneficiaries on every retirement, insurance, and bank account once a year, as part of an annual financial review, not just after a major life event.