A carefully drafted will can be worth less than a two-page form somebody filled out at their first job. That form, the beneficiary designation on a 401(k), IRA, or life insurance policy, is what decides where the money goes. A will names an executor and divides an estate. A beneficiary form moves the money. When the two disagree, the form wins, and the family finds out at the worst possible moment.
The stakes are not theoretical. Retirement accounts and life insurance often make up the largest slice of a household’s net worth, and every dollar of it can bypass the will completely.
That’s a feature of how these accounts are built, not a loophole. It also means an outdated form can hand hundreds of thousands of dollars to the wrong person without anyone noticing until the check clears.
The Paperwork Nobody Re-Reads Decides the Money
Beneficiary designations are contracts between you and the account custodian. They pass outside probate, which is why they are so useful and so dangerous. The custodian doesn’t read your will. It reads the form on file and pays whoever is on it.
The Supreme Court settled the point for ERISA retirement plans in Kennedy v. DuPont. A man had divorced years earlier, and the decree said his ex-wife gave up any claim to his savings plan. He never updated the form.
When he died, the plan paid the entire balance, a six-figure sum, to the ex-wife because her name was still on it. The daughter, who was named in the will, got nothing from that account.
That’s the whole lesson in one case. Divorce decrees, wills, side letters, family agreements, promises made at Thanksgiving, none of them override the form. If you want a different result, change the form.
Why ‘I’ll Fix It in the Will’ Fails
Most people, when they hear this, assume their attorney handled it. The estate plan is a thick binder. The will is signed and notarized. Surely the trust language sweeps in everything.
But a will can only distribute what the probate estate actually owns at death. If your IRA lists your brother as primary beneficiary, that IRA is not part of your probate estate. It goes to your brother.
The trust your attorney drafted can be beautifully written and completely bypassed. Coordinating those documents with the beneficiary lines is exactly the kind of work a financial planning team handles alongside an estate attorney, so the paperwork actually reflects the plan.
The intuitive fixes fall short for predictable reasons:
- A divorce decree waiver. State family law can order an ex-spouse to disclaim benefits, but the plan administrator still pays the name on the form. Enforcement then becomes a lawsuit against the ex-spouse, not a phone call to the custodian.
- A will contest. Contesting the will accomplishes nothing when the disputed money never entered the will’s reach in the first place.
- A verbal understanding. Aunts, siblings, and adult children often say they’ll pass the money along to the ‘right’ person. That is a gift from them, taxable and voluntary, not a substitute for correct paperwork.
- Naming ‘my estate’ as beneficiary. This routes the account through probate, which usually accelerates taxes on retirement accounts and drags the family through months of court process for no real benefit.
Update the Forms, Then Coordinate Everything Else
The fix is boring, which is why it works. Pull every account that has a beneficiary line and read what it says today. That includes 401(k)s from old employers, rollover IRAs, Roth IRAs, HSAs, pensions, life insurance through work, life insurance you bought yourself, annuities, and any transfer-on-death registration on a brokerage account.
Do not skip the old 401(k) sitting at a prior employer. That is the one most likely to still name a college roommate or a first spouse. A few rules make the rest of the work easier:
- Name primary and contingent. If the primary beneficiary predeceases you and there is no contingent, the account usually defaults to the estate, which is the outcome you were trying to avoid.
- Mind the spousal rules. For a workplace plan, federal law generally requires that a married participant’s balance go to the surviving spouse unless the spouse consents in writing. Naming the kids without that consent doesn’t stick.
- Coordinate with the trust. Some accounts should name individuals; some should name a properly drafted trust for tax and control reasons. That is a decision to make with an advisor, not a default to guess at.
- Re-check after life events. Marriage, divorce, a birth, a death, a rollover to a new custodian: any of these can reset or invalidate a designation. The rollover in particular often blanks the old form and starts you at ‘estate’ by default.
None of this is hard. It is tedious, which is why it doesn’t get done. Put a recurring calendar reminder every two years and after any major life change, and you will avoid the outcome that has cost other families the biggest asset on the balance sheet.
