This article is general information, not legal or tax advice. Unless otherwise labeled inline, all figures reflect 2026 data as published by the IRS, FDIC, and named state authorities; consult a licensed estate planning attorney before acting.
TL;DR — Quick Verdict
- Your will does not control your 401(k), IRA, life insurance, or payable-on-death bank account. The beneficiary designation on file with Fidelity, Vanguard, Northwestern Mutual, or your bank controls those assets outright.
- In Kennedy v. Plan Administrator for DuPont Savings and Investment Plan, 555 U.S. 285 (2009), the U.S. Supreme Court ordered a 401(k) paid to an ex-wife even though a divorce decree waived her rights — the plan document won.
- A single stale form on a $24,500-per-year 401(k) funded over 20 years can misdirect a mid-six-figure balance to the wrong person with zero court review.
- Comparison result: routing $1,000,000 through California probate costs roughly $46,000 in combined statutory attorney and executor fees under Probate Code § 10810. Routing it by beneficiary designation costs $0 in statutory fees.
- FDIC coverage on payable-on-death accounts runs $250,000 per eligible beneficiary, capped at five beneficiaries and $1,250,000 per owner per bank, effective April 1, 2024.
- Recommendation: pull every designation form annually, name contingent beneficiaries on all of them, and never assume a will amendment reached your custodian.
The National Association of Insurance Commissioners reported in September 2024 that its Life Insurance Policy Locator had connected consumers with more than $10 billion in unclaimed life insurance and annuity benefits since launching in November 2016. That number exists because beneficiary paperwork fails quietly. Nobody sues. No judge reviews it. A form sits in a Fidelity or Prudential file drawer naming a person who divorced, died, or was never meant to inherit — and the custodian pays them anyway.
Most people believe a will is the master document. It is not. A will governs probate assets only, and the largest accounts most Americans own are not probate assets. Retirement plans, IRAs, life insurance, annuities, and payable-on-death bank accounts pass by contract, and that contract names a beneficiary. The Supreme Court has twice confirmed that the form controls.
This article maps exactly which assets bypass your will, prices the cost of getting it wrong against the cost of attorney and online will pricing, models the tax consequence of a misrouted inherited IRA under the SECURE Act 10-year rule, and gives you the audit sequence to fix it.
Which Assets Ignore Your Will Entirely
Estate assets divide into two categories, and the dividing line is whether a contract already names a recipient. Probate assets — the house titled in your name alone, the brokerage account with no transfer-on-death registration, the car, the coin collection — pass under your will. Non-probate assets pass under their own paperwork, and your will is legally irrelevant to them.
The confusion causes real damage because the non-probate category holds most of the money. A retiree with a $600,000 rollover IRA, a $400,000 group life policy, and a $200,000 house has 83% of gross estate value sitting outside the will’s reach.
Sources: Employee Retirement Income Security Act of 1974, 29 U.S.C. § 1104(a)(1)(D); FDIC deposit insurance rules effective April 1, 2024. Verify at fdic.gov.
Joint tenancy deserves separate scrutiny because it functions as an accidental beneficiary designation on real estate. Adding an adult child to a deed transfers the property at death without probate, but it also exposes the property to that child’s creditors during your lifetime — a trade-off worth weighing against joint tenancy versus trust probate avoidance.
Why the Supreme Court Made the Form Unbeatable
Two decisions settled this. In Egelhoff v. Egelhoff, 532 U.S. 141 (2001), the Court struck down a Washington statute that automatically revoked a spouse’s beneficiary designation on divorce, holding that ERISA preempted the state law because it interfered with uniform plan administration. The ex-spouse collected.
Eight years later, Kennedy v. Plan Administrator for DuPont Savings and Investment Plan, 555 U.S. 285 (2009), closed the remaining gap. William Kennedy divorced Liv Kennedy under a decree that divested her of any interest in his savings and investment plan. He never filed a new designation form. When he died, his daughter — executrix of his estate — demanded the funds. A unanimous Court held that the administrator had to follow the plan documents and pay Liv, reasoning that ERISA forecloses inquiries into external expressions of intent in favor of an uncomplicated rule.
Read that carefully. A federal court order, signed by a judge, containing an explicit waiver, lost to a form. Your will — a document no plan administrator ever sees — has no chance.
State law offers thin protection for non-ERISA assets. Roughly half the states have revocation-on-divorce statutes covering IRAs, POD accounts, and individually purchased life insurance, but coverage is inconsistent, litigation is common, and those statutes stop at the ERISA line. Relying on one is a bet that your state’s version applies to your specific asset and that no one contests it.
One meaningful exception cuts the other way. ERISA-governed plans require spousal consent for a married participant to name someone other than the spouse as primary beneficiary of a qualified plan. That protection does not extend to IRAs. A rollover from a 401(k) to a Vanguard or Schwab IRA quietly strips a surviving spouse of a federal right they had the day before, which is why rollovers belong on the same review checklist as will update triggers and amendment costs.
The Real Cost of a Stale Form: Two Scenarios Priced
Numbers make the abstraction concrete. Consider Marcus, 58, who divorced in 2019 and remarried in 2022. His 401(k) at a large plan sponsor holds $780,000. The designation form still names his first wife. His 2023 will, drafted for $2,400 by an attorney, leaves everything to his current spouse.
Marcus dies in 2026. Under Kennedy, the plan administrator pays $780,000 to his first wife. His widow’s options are litigation with a low probability of success and a legal bill that routinely runs into five figures — see the cost of challenging or defending a will. The $2,400 will accomplished nothing for the largest asset he owned.
Now the tax layer. Suppose instead the form correctly names his widow’s adult son rather than the widow herself. A non-spouse beneficiary who is not an eligible designated beneficiary falls under the SECURE Act 10-year rule. The IRS finalized those regulations in July 2024 (T.D. 10001), effective for distribution calendar years beginning January 1, 2025, and confirmed that where the account owner died after the required beginning date, the beneficiary must take annual distributions during years one through nine and empty the account by the end of year ten.
Original modeling by Real Cost Report. Assumes a $780,000 traditional 401(k) balance, no growth, and flat marginal rates of 24%, 33%, and 38% respectively across each distribution window. Distribution rules per IRS final regulations T.D. 10001. Verify at irs.gov.
The spread between the best and worst outcome is $109,200 on a single account — driven entirely by which name appears on one page. Naming the estate is the costliest error, because an estate is not a designated beneficiary, which compresses distribution into five years and stacks income into the compressed trust and estate tax brackets.
Beneficiary Designation vs. Living Trust: Which Is Better for a Blended Family?
Both routes avoid probate. They diverge on control, and blended families are where the divergence bites.
A beneficiary designation is a single-shot instruction: the named person receives the asset outright, immediately, with no strings. Cost is $0 — the form is free at every custodian. Speed is the other advantage; a life insurance claim typically pays within weeks of a death certificate reaching the insurer, while a California probate for a $1,000,000 estate generates roughly $23,000 in statutory attorney fees and another $23,000 in personal representative fees under Probate Code § 10810, plus a $435 petition filing fee, across a 12- to 18-month timeline.
Trusts buy something a form cannot: conditions. A trust can pay income to a surviving spouse for life and direct the remainder to children from a first marriage. A designation naming the spouse outright gives them full ownership and full freedom to redirect the money — including away from your children. The setup cost is real, and living trust attorney fees by complexity vary widely by state and asset mix, but it purchases enforceable structure.
The trust route also has a failure mode of its own. A trust controls nothing it does not own. Signing the document and never retitling assets to fund the trust produces the same probate you paid to avoid, which is exactly why a pour-over will exists as a backstop. Retirement accounts complicate this further — naming a trust as IRA beneficiary requires see-through trust drafting to preserve favorable distribution treatment, and getting it wrong triggers the five-year rule.
Verdict
For a first marriage with adult children and no special circumstances, direct beneficiary designations win outright — $0 cost, near-instant transfer, no probate. For blended families, minor children, spendthrift heirs, or a disabled beneficiary, the designation is inadequate on its own; name a properly drafted trust and accept the setup fee, because the alternative is an outright transfer you cannot condition or claw back.
Five Mistakes That Redirect Money to the Wrong People
Every one of these appears in probate litigation with predictable regularity.
1. Leaving the contingent beneficiary line blank
If the primary beneficiary predeceases you and no contingent is named, the asset usually defaults to your estate. Consequence: the account enters probate and, for retirement accounts, loses designated beneficiary status and the 10-year window. Correct action: name at least one contingent on every account, and specify per stirpes if you want a deceased child’s share to pass to their children.
2. Naming a minor directly
Insurers will not write a check to a 9-year-old. Consequence: a court appoints a guardian of the estate, billing fees against the child’s money, and the child receives the full balance outright at 18 or 21 depending on state law. Correct action: name a custodian under your state’s Uniform Transfers to Minors Act or a trust, and pair it with a guardian designation for minor children.
3. Naming a disabled beneficiary outright
Consequence: a lump-sum inheritance can disqualify the recipient from Supplemental Security Income and Medicaid until the funds are spent down. Correct action: direct the share to a special needs trust drafted to preserve means-tested eligibility.
4. Assuming a divorce decree updated the form
It did not. Kennedy settles the ERISA side, and state revocation statutes are inconsistent everywhere else. Correct action: file new designation forms with every custodian within 30 days of a decree, and confirm receipt in writing.
5. Treating a rollover as neutral
Moving a 401(k) to an IRA does not carry the old designation forward, and it eliminates the ERISA spousal consent requirement. Consequence: the new IRA may default to the estate or to a stale form from a prior account opening. Correct action: complete a fresh designation at the receiving custodian on the day the rollover settles.
Is a Full Designation Audit Worth Your Time?
Yes, if any of the following is true — and the audit itself costs nothing but an afternoon.
You have married, divorced, remarried, had a child, lost a beneficiary, or changed jobs since the last time you signed a form. You hold accounts at more than two custodians. You have an old employer plan you never rolled over. You named a trust as beneficiary of a retirement account without confirming the see-through language. You hold more than $250,000 at one bank in POD accounts, where FDIC coverage runs $250,000 per eligible beneficiary up to five beneficiaries and a $1,250,000 ceiling per owner per institution.
Federal estate tax is not the constraint for most readers. The One Big Beautiful Bill Act, Public Law 119-21, set the basic exclusion amount at $15,000,000 per person for 2026, with a 40% top rate above that and portability allowing married couples to shelter $30,000,000. State estate and inheritance taxes bite at far lower thresholds in roughly a dozen states, so verify your own state independently.
The audit sequence: list every account and policy; request a current beneficiary confirmation in writing from each custodian rather than trusting an online portal display; reconcile the list against your will and any trust; correct discrepancies; and re-run it annually. If the reconciliation reveals structural problems — a blended family, a business interest, a taxable state estate — that is the signal to compare living trust versus will lifetime costs rather than patching forms one at a time.
Frequently Asked Questions
Can I use my will to override a beneficiary designation?
No. In Kennedy v. Plan Administrator for DuPont Savings and Investment Plan, 555 U.S. 285 (2009), the Supreme Court held unanimously that ERISA requires administrators to pay according to plan documents, rejecting even an explicit divorce-decree waiver. A will is weaker evidence of intent than a court order, and plan administrators never see it. Change the form itself at the custodian.
What happens if no beneficiary is named on my IRA?
The custodial agreement’s default applies — commonly the surviving spouse, otherwise the estate. If the estate takes it, there is no designated beneficiary, so the five-year rule applies rather than the SECURE Act 10-year rule. In our modeled $780,000 scenario that difference cost $39,000 in additional tax versus the 10-year outcome, plus probate exposure.
Does a payable-on-death account keep full FDIC coverage?
Under FDIC rules effective April 1, 2024, POD and in-trust-for accounts fall in the single trust accounts category: $250,000 per eligible primary beneficiary, capped at five beneficiaries, for a maximum of $1,250,000 per owner per insured bank. Naming a sixth beneficiary adds no coverage. Two owners double the ceiling to $2,500,000.
Should I name my living trust as my 401(k) beneficiary?
Only with see-through trust drafting. A trust that fails the IRS see-through requirements is treated as a non-designated beneficiary, forcing the five-year rule and compressed trust tax brackets. Naming a spouse directly preserves the ability to roll the account into their own IRA — the most tax-efficient outcome in nearly every model we ran.
How We Researched This Article
Legal authority in this article comes from primary sources only. Case holdings were verified against the published opinions in Egelhoff v. Egelhoff, 532 U.S. 141 (2001) and Kennedy v. Plan Administrator for DuPont Savings and Investment Plan, 555 U.S. 285 (2009) as reported by the Cornell Legal Information Institute. Statutory citations to ERISA reference 29 U.S.C. §§ 1104 and 1056.
Retirement contribution and distribution figures were drawn from IRS News Release IR-2025-111 (November 13, 2025) and Notice 2025-67 for 2026 limits, and from final regulations T.D. 10001, published July 2024 and effective for distribution calendar years beginning January 1, 2025, for the 10-year rule. Estate tax figures come from the IRS 2026 inflation adjustment release implementing the One Big Beautiful Bill Act, Public Law 119-21, signed July 4, 2025. Readers can confirm current limits directly at IRS.gov.
Deposit insurance figures reflect the FDIC trust accounts rule effective April 1, 2024, as published by the Federal Deposit Insurance Corporation. The unclaimed benefits figure is the NAIC’s own reported total for its Life Insurance Policy Locator as of its September 2024 announcement; more recent cumulative totals may exist and the figure is labeled to its publication period rather than presented as current.
California probate fee figures apply the statutory schedule in California Probate Code §§ 10800 and 10810 — 4% of the first $100,000, 3% of the next $100,000, 2% of the next $800,000, 1% of the next $9,000,000, and 0.5% of the next $15,000,000 — computed independently by Real Cost Report rather than taken from a secondary summary. Filing fees were verified against published Superior Court schedules; county-level supplemental fees vary and were excluded.
Limitations: the tax figures in the distribution comparison table are modeled, not measured. They assume flat marginal rates, no account growth, and no state income tax, and they are intended to show the relative spread between beneficiary structures rather than to predict any individual outcome. Actual liability depends on filing status, bracket movement, state residency, and account performance. State revocation-on-divorce statutes were not surveyed jurisdiction by jurisdiction; readers should verify their own state’s rule with counsel. Research last conducted July 2026.
All figures were verified against named primary sources before publication.