Beneficiary Designations: The Most Overlooked Estate Document

For most American households the largest non-real-estate asset passes outside the will. IRAs, 401(k)s, life insurance, and annuities transfer by contract — specifically, by the beneficiary designation form on file with the custodian. A meticulously drafted will and trust are irrelevant to those assets. A stale beneficiary form, by contrast, controls regardless of subsequent marriages, divorces, deaths, or estate plans. Beneficiary forms are the most consequential single page in the estate plan.

The contractual override

Under the Employee Retirement Income Security Act of 1974, plan administrators must distribute qualified plan benefits in accordance with the plan documents and the beneficiary designation. The Supreme Court confirmed in Kennedy v. Plan Administrator for DuPont Savings & Investment Plan, 555 U.S. 285 (2009), that the plan administrator was required to pay benefits to the ex-spouse named on file, even though the divorce decree purported to waive her rights. The Court held that ERISA §404(a)(1)(D) requires the administrator to follow plan documents. The will was irrelevant; the divorce decree was irrelevant; the form controlled.

For IRAs (not ERISA plans) similar principles apply under state contract law. Custodian agreements universally direct the IRA to the named beneficiary.

What overrides what

• Beneficiary designation controls qualified plans, IRAs, HSAs, life insurance, annuities, transfer-on-death brokerage accounts, payable-on-death bank accounts.
• Joint titling with right of survivorship controls jointly titled real estate, brokerage, and bank accounts.
• Will and trust control everything else.

The order matters because beneficiary designations and joint titling pass outside probate. The probate court never sees them. The will applies only to the residue.

Worked example: the unintended ex-spouse

A 58-year-old executive marries in 1995, names his wife as 100% primary beneficiary of his 401(k) ($1.2M) and term life ($2M). They divorce in 2008. He remarries in 2012. He executes a new will leaving "all property" to his current wife and two minor children. He dies in 2024 without updating either beneficiary form.

Result: The $1.2M 401(k) and $2M life insurance proceeds — $3.2M, the bulk of the estate — pass to the ex-spouse. The current wife and children receive only the residual estate (house, cars, taxable brokerage), valued at approximately $900,000. The will did not override the form. Litigation against the ex-spouse generally fails under Kennedy and progeny; a few state revocation-on-divorce statutes apply only to non-ERISA assets and only sometimes.

What a competent beneficiary review covers

• Every account. Every retirement plan at every current and former employer. Every IRA. Every life insurance contract (including small employer-provided group policies). Every annuity. Every HSA. Every TOD/POD designation.
• Primary and contingent. Naming only a primary beneficiary leaves the contingent as the estate by default — which forces probate, eliminates the spousal rollover option, and accelerates required distributions to a five-year payout under §401(a)(9)(B)(ii).
• Per stirpes versus per capita. Determines whether a deceased child's share passes to that child's children or is reallocated among surviving children.
• Trust beneficiaries. A trust as IRA beneficiary requires careful drafting to qualify as a "see-through" trust under Treas. Reg. §1.401(a)(9)-4. See our companion article on trusts as IRA beneficiaries.
• Spousal consent for non-spouse beneficiary of qualified plans. Under §417 the spouse of a 401(k) participant must consent in writing to a non-spouse beneficiary; without consent the spouse takes regardless of the form.

Common mistakes

• Naming "my estate" as beneficiary. The estate is not a "designated beneficiary" under Treas. Reg. §1.401(a)(9)-4. Result: if death occurs before the required beginning date, the 5-year rule under §401(a)(9)(B)(ii) applies; if death occurs on or after the RBD, distributions follow the decedent's remaining single-life expectancy (the "ghost life-expectancy" rule). Either way the 10-year rule and life-expectancy stretch options available to designated beneficiaries are lost. Probate and creditor exposure also increase.
• Naming a minor child directly. Forces a court-supervised guardianship for the assets until the child reaches age of majority (18 or 21 depending on state), at which point the entire balance pays to a young adult with no spending controls. Use a custodian under UTMA or a trust.
• Failing to update after life events. Marriage, divorce, birth of a child, death of a named beneficiary. Each is a trigger to review.
• Assuming a divorce decree updated the forms. It did not. The forms must be updated separately with each custodian.

Sources

• Kennedy v. Plan Administrator for DuPont Savings & Investment Plan, 555 U.S. 285 (2009): supremecourt.gov/opinions/08pdf/07-636.pdf
• ERISA §404(a)(1)(D), 29 U.S.C. §1104: law.cornell.edu/uscode/text/29/1104
• Internal Revenue Code §401(a)(9), required minimum distributions: law.cornell.edu/uscode/text/26/401
• Internal Revenue Code §417, spousal consent: law.cornell.edu/uscode/text/26/417
• Treasury Regulation §1.401(a)(9)-4, designated beneficiary rules: ecfr.gov §1.401(a)(9)-4

A beneficiary audit takes thirty minutes and is the highest-leverage hour in estate planning. Explore the free educational tool.