Your will does not control your 401(k).

It does not control your IRA either. You can write the most careful, expensive, lawyer-reviewed will in your county, specify exactly who gets what, sign it in front of witnesses, and none of it will touch your retirement accounts.

A form does that. A form you filled out at a desk, possibly during onboarding, possibly in 2009, possibly while a benefits coordinator waited.

That form wins. Every time. Against the will, against your stated wishes, against what everyone in the family knows you wanted.

Courts have upheld this in cases where the outcome was plainly not what the deceased intended. An ex-spouse named in 1998 and never removed inherits the account. The will saying otherwise does nothing.

Here is the uncomfortable question this article is built around.

Can you name, right now, the beneficiary on every retirement account you own?

Most people cannot. Some cannot even name all the accounts.

That gap is where the damage happens, and it is entirely fixable in about an hour.

The form beats the will. Always.

Retirement accounts pass by beneficiary designation, outside probate. That is generally a feature rather than a bug.

It means the money moves quickly, privately, without court supervision, and without waiting for the estate to settle. A surviving spouse can access it in weeks rather than months.

The catch is that the form is a standing instruction that nobody reviews and nothing updates automatically.

Divorce does not update it. Remarriage does not update it. The death of the person you named does not update it. A new child does not update it.

Some state laws attempt to revoke an ex-spouse's designation automatically after divorce, but those statutes can be preempted for employer plans governed by federal law. So the protection you assume exists may not apply to the account that matters most.

The IRS covers beneficiary designations here, and the mechanics differ meaningfully between IRAs and workplace plans.

The difference nobody expects: your spouse's rights

This is the single biggest structural difference between the two account types, and it surprises almost everyone.

401(k) and most workplace plans

IRA

Default beneficiary if married

Spouse, by federal law

Whoever you named

Naming someone else

Generally needs written spousal consent

No consent required

Consent formality

Often notarized or witnessed by plan rep

Not applicable

If no valid beneficiary named

Plan document decides, usually spouse

Custodian agreement decides

Ex-spouse protection after divorce

State revocation laws may be preempted

Varies by state

Payout speed for beneficiaries

Plan may force a lump sum

Generally the full legal period

Read row two twice.

In a 401(k), you generally cannot disinherit your spouse without their written, formal consent. Federal law protects them.

In an IRA, you can name anyone. Your brother. A charity. A friend. Your spouse has no automatic claim, and in most states no consent is required.

Which means the same person, with the same intentions, gets two completely different outcomes depending on which account the money sits in.

And it means a rollover is not a neutral act. Moving a 401(k) into an IRA can quietly strip your spouse of a protection federal law gave them.

Who you name changes what they get

Not all beneficiaries are treated alike. The law sorts them into categories, and the category determines how fast the money must come out.

Beneficiary

Category

Payout window

Surviving spouse

Eligible designated

Can treat as own, or stretch over life expectancy

Minor child of the owner

Eligible designated

Life expectancy until majority, then ten years

Disabled or chronically ill person

Eligible designated

Life expectancy

Person within ten years of your age

Eligible designated

Life expectancy

Adult child

Designated

Ten years

Grandchild, friend, most others

Designated

Ten years

Most trusts

Depends on trust terms

Ten years, or worse

Your estate

Not designated

Five years, or faster

Charity

Not designated

Five years, but tax-exempt anyway

Nobody named

Depends on document

Often the worst available

Look at the last three rows. Those are the failure states, and they happen by accident rather than by choice.

Leaving an IRA to your estate is almost always the worst outcome. The money goes through probate, becomes public, gets delayed, and compresses into a much shorter payout window that stacks income into fewer tax years.

And "nobody named" produces exactly that result in many custodial agreements.

The charity row is interesting in the opposite direction. A charity pays no income tax on inherited pre-tax retirement money, so the short window costs nothing.

Which produces a genuinely useful estate insight: leave the traditional IRA to charity and the Roth to your children. Each asset goes where it is worth the most. Most people do the reverse without thinking.

The IRS covers beneficiary distribution rules here, and Publication 590-B goes through the categories in detail.

The trust question

Every estate attorney gets asked this, and the answer is more nuanced than either side of the internet suggests.

You can name a trust as your IRA beneficiary. Sometimes you should.

Good reasons to use a trust

You have a minor child and do not want a large account handed to them at eighteen. You have a beneficiary with a disability and want to preserve their benefits eligibility. You are in a second marriage and want to provide for a spouse while ensuring the remainder reaches your children. You have a beneficiary with creditor problems, an addiction, or a difficult marriage.

These are real problems that a trust solves and a beneficiary form cannot.

The cost

A trust is a legal entity, not a person, so it does not automatically qualify for the friendlier beneficiary categories.

A properly drafted see-through trust can look through to the individual beneficiaries. A poorly drafted one cannot, and then the account gets treated as though no person was named, with a much shorter payout window.

The drafting requirements are technical, and a trust written before the ten-year rule arrived may no longer behave the way its author intended.

There is also a tax problem. If the trust accumulates the distributions rather than passing them out, trust tax brackets compress extremely quickly. Income that would have been taxed modestly in your child's hands can be taxed at the top rate inside a trust.

The honest summary

Do not name a trust because it sounds responsible. Name one because you have a specific problem it solves, and have it drafted by someone who does this work regularly.

And if you already have a trust named, find out when it was drafted. Anything written before the current beneficiary rules deserves a review.

What happens if your beneficiary dies before you

This is the failure nobody plans for, and it is more common than it sounds. People name a sibling, or a spouse, or a parent, and then outlive them.

What happens next depends entirely on one thing: did you name a contingent beneficiary?

If yes, the account goes to them. Clean, fast, exactly as intended.

If no, you are relying on the custodial agreement or plan document, and the default is rarely good. It often routes the money to your estate, which triggers probate and the shortest payout window available.

So the contingent beneficiary line, the one most people leave blank because it felt optional, is the difference between a smooth transfer and a court process.

A few related mechanics worth knowing.

Per stirpes versus per capita. If you name three children and one predeceases you, does that share go to their kids or get split among the surviving two?

Per stirpes sends it down to the deceased child's descendants. Per capita splits it among the survivors. Most forms default to per capita, and most people assume per stirpes.

If you have grandchildren, this single word choice can redirect a large sum.

Disclaimers. A beneficiary can refuse an inheritance, in which case it passes to the contingent beneficiary. This is sometimes used deliberately, for example a surviving spouse who does not need the money disclaiming so it passes directly to the children.

The rules are strict and time-limited, generally requiring the disclaimer within nine months and before accepting any benefit. It is a planning tool, not something to figure out afterwards.

Simultaneous death. Plans and custodial agreements have provisions for this. They are usually reasonable, but they are decisions someone else made on your behalf.

Three families, three forms

Harold named his wife in 1994. They divorced in 2011.

He remarried in 2014. He updated his will carefully, leaving everything to his second wife and his two children.

He never opened the 401(k) portal. Why would he? The money was there, the statements came, the balance grew.

He died at 71 with $610,000 in that plan.

His first wife received it. Not because anyone was malicious, but because the form said so and the plan administrator's job is to follow the form.

His widow sued. The case turned on federal preemption of the state statute that would otherwise have revoked the designation. She spent two years and a large sum on legal fees.

The will never mattered. It was never going to matter.

Elaine named her estate, because she thought that was the tidy answer.

Her reasoning made sense to her. The will already spelled out who gets what, so routing the IRA through the estate would keep everything consistent.

The result: her $280,000 IRA went through probate. It became a public record. Her children waited fourteen months.

And because an estate is not a designated beneficiary, the payout window compressed to five years rather than ten. The same money came out in half the time, stacking into fewer tax years at higher rates.

Her tidiness cost her children roughly a fifth of the account in avoidable tax, plus the delay.

Priya named her two adult children, per stirpes, with her sister as contingent.

Her son died in a car accident three years before she did, leaving two young children.

Because she had selected per stirpes, her son's half passed to his children rather than being absorbed by her surviving daughter.

That single checkbox, chosen in about four seconds on a web form, redirected $190,000 to her grandchildren exactly as she would have wanted.

She never discussed it with anyone. She just read the form properly.

Three families. Three outcomes. None of them determined by a will, an attorney, or a conversation.

All three determined by what was typed into a beneficiary field.

A note on what your family will actually face

Worth saying plainly, because the practical side rarely gets covered.

A beneficiary cannot simply take over your account. They must open a new inherited account in a specific registration format, then have the assets transferred into it.

Done wrong, and it is done wrong constantly, the transfer becomes a full taxable distribution. The entire balance, in one year, as ordinary income.

There is no undo. A non-spouse beneficiary generally cannot roll the money back in once it has been paid out to them personally.

Which means the highest-value thing you can leave behind is not just a correct beneficiary form. It is a note that says: do not accept a check, ask for a trustee-to-trustee transfer into an inherited IRA, and speak to a tax professional before signing anything.

That sentence has saved families more money than most estate planning documents.

What beneficiaries need to do from their side is covered in inherited IRA rules.

The mistakes, ranked by damage

  1. An ex-spouse still named. The most common catastrophic error. Divorce decrees do not reliably override beneficiary forms, particularly for employer plans.

  2. No beneficiary at all. Sends the account to your estate, into probate, with the shortest payout window and full public visibility.

  3. No contingent beneficiary. Fine until your primary predeceases you, then identical to the problem above.

  4. A minor named directly. Courts get involved. A guardian may have to be appointed. And the child may receive full control at the age of majority.

  5. A trust named without proper drafting. Loses the friendlier payout categories and can land in compressed trust tax brackets.

  6. Forms out of sync across accounts. Five accounts, five different sets of instructions, nobody knows which is current.

  7. Accounts nobody can find. Old 401(k) plans from former employers, with statements going to an address you left years ago.

Number seven is the quiet one. Billions of dollars sit unclaimed in forgotten workplace retirement accounts, and the people who could claim them do not know they exist.

If you cannot list your accounts from memory, your family will have a much harder time than you think. The clean-up is covered in can you have multiple 401(k) accounts.

The edge cases

You live in a community property state.

Your spouse may have a claim to IRA assets accumulated during the marriage, even though IRAs generally lack the federal spousal protection that plans have. State law matters here and it varies.

You are in a second marriage.

The classic conflict. Naming your current spouse means your children from the first marriage may receive nothing, because your spouse controls where it goes next once they inherit it.

This is the single most common reason to use a properly drafted trust.

Your beneficiary is not a US person.

Withholding rules and treaty positions complicate things considerably, and some custodians handle it badly. Worth raising specifically rather than assuming.

You have a Roth and a traditional account.

They should probably go to different people. Tax-free money to individuals, pre-tax money to charity, because only one of those recipients pays income tax on it.

Your plan forces a fast payout.

Some employer plans require beneficiaries to take everything within a short window, sometimes a single lump sum, even when the law would allow longer. That is a plan document decision your employer made.

Find out before you decide to leave money in a plan rather than rolling it to an IRA.

You die with an outstanding plan loan.

The unpaid balance is generally offset and treated as a distribution, which becomes a tax event on your final return rather than a debt your family inherits.

You die before taking that year's required withdrawal.

If you were already subject to required distributions, that year's amount still has to come out. It becomes the beneficiary's responsibility, and missing it carries a penalty they did not cause.

Roth or traditional changes what you are handing over

The beneficiary form decides who. The account type decides what that person actually receives.

Traditional IRA or 401(k)

Roth IRA or Roth 401(k)

Tax to a non-spouse heir

Ordinary income on every dollar

Generally tax-free

When they usually inherit

Peak earning years

Peak earning years

Effect on their bracket

Stacks on their salary

None

Payout window

Ten years for most

Ten years for most

Must they take annual amounts?

Sometimes, depends on your age at death

Generally no, just empty by year ten

Value to a charity

Full, charity pays no income tax

Full, but the tax break is wasted

Row one is the whole point. A $400,000 traditional IRA left to a 48-year-old earning well is not $400,000 to them. After ten years of forced withdrawals stacked on top of their salary, a substantial share goes to tax.

The same $400,000 in a Roth arrives intact.

Row five is a subtlety worth knowing. For an inherited traditional account, whether annual withdrawals are required during the ten years can depend on whether you had already started your own required distributions before you died.

An inherited Roth generally has no such annual requirement. The beneficiary just has to empty it by the deadline, which means they can leave it growing tax-free for nine years and take it all at the end.

That flexibility is worth real money, and it is a reason to convert during your lifetime if your heirs are the ultimate destination. The case for doing that in your sixties is in converting an IRA to a Roth after 60.

What to actually do this hour

This is a task, not a project.

List every retirement account you own. Current 401(k), old 401(k)s, every IRA, every Roth.

Log into each one and read the beneficiary section. Not what you remember. What it says.

Name a primary and at least one contingent on every single account.

Check the per stirpes option if you have grandchildren or want shares to pass down.

If you are married and naming someone other than your spouse in a workplace plan, get the consent form completed properly.

Write the list down somewhere your family will find it. Not a password manager they cannot access. Somewhere findable.

Then set a calendar reminder to repeat this after any marriage, divorce, birth or death in the family.

The paperwork your family will actually hit

One practical section, because the emotional part is hard enough without administrative surprises.

Custodians and plan administrators will not act on a phone call. They need a certified death certificate, usually more than one copy, and their own claim forms.

Order ten certified copies. Every institution wants an original and most will not return it. Families routinely order two and then wait weeks for more.

Each beneficiary handles their own share separately. If you named three children, that is three claims, three new accounts, three sets of forms. They cannot do it collectively.

Expect the process to take one to three months per institution even when everything is correct. Employer plans are generally slower than IRA custodians, because there is often a layer of HR between the family and the recordkeeper.

And there is a deadline nobody mentions in the first month. If multiple beneficiaries are named, splitting the account into separate inherited accounts by the applicable deadline lets each person use their own category and timeline.

Miss that split and everyone can be forced onto the least favourable schedule in the group. One beneficiary who is a charity or an estate can drag the others down.

So the single most useful instruction to leave behind is short. Split the account first, then decide what to do with your share.

The other one is shorter still. Do not accept a check.

The bottom line

Your retirement accounts do not follow your will. They follow a form, and that form has been sitting untouched since whenever you last filled it in.

Workplace plans protect your spouse by default. IRAs do not. Which means the same decision produces different outcomes depending on the wrapper, and a rollover can quietly change who is protected.

Who you name determines not just who receives the money but how quickly they must take it and how much tax it costs them. An adult child gets ten years. Your estate gets five or fewer, plus probate.

And the blank contingent line is the one that turns a smooth transfer into a court case.

None of this requires a lawyer for most people. It requires an hour, a list of your accounts, and the willingness to read what you actually wrote down years ago.

The person who has to deal with the consequences will not be you.

See you next issue. 🪙

This is general education, not financial, tax or legal advice. Beneficiary categories, payout windows, spousal consent requirements, trust qualification rules, disclaimer deadlines and state revocation statutes are set by federal law, plan documents and state law, and all of them change over time. Estate planning depends entirely on individual circumstances and is worth reviewing with a qualified attorney.

Sources: IRS guidance on retirement plan beneficiaries, required minimum distributions for IRA beneficiaries, required minimum distribution FAQs, and Publication 590-B on distributions from individual retirement arrangements; U.S. Department of Labor Employee Benefits Security Administration materials on participant and beneficiary rights under employer plans.