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Beneficiary Forms: The Overlooked Estate Step

Updated October 2026 · About 5 min read

A will does not touch your 401(k) or IRA. Beneficiary designations on retirement accounts override whatever a will says — and an outdated form has redirected seven-figure balances to ex-spouses, sent accounts into five-year payout rules, and triggered avoidable tax bills. It is the most commonly forgotten step in retirement planning.

Why the Form Beats the Will

Retirement accounts pass by contract, not probate. When the custodian asks who the beneficiary is, the named person on file receives the account regardless of what the will, a divorce decree memory, or family expectations say. Courts have consistently enforced stale designations, including cases where the will named new heirs but the form still listed a former spouse. Checking each account once a year takes minutes and costs nothing.

Designations That Work Best

Life Events That Demand a Review

Marriage, divorce, births, deaths, and job changes all change the right answer. Divorce is the sharpest edge: some states automatically revoke an ex-spouse's designation, others do not, and federal ERISA rules for 401(k)s generally require a signed spousal waiver to name anyone else. After a divorce, verify every account — including old employer plans still sitting with former employers, which is also where the largest share of forgotten accounts lives.

Charitably minded savers can name a charity as a partial beneficiary of pre-tax accounts; charities pay no income tax, making them efficient recipients of the most tax-heavy dollars, while heirs inherit the Roth money.

Hand holding a pen over a document with a checkbox
The custodian's form outranks the will — check it yearly.

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