When you picture who inherits your accounts, it is natural to think first of your will. Yet for many accounts, a beneficiary form can quietly override your will, and so can the way the account is titled. That raises an obvious question: how does each of your accounts actually transfer?
This is the field guide. We will walk through the five most common ways individuals & families hold investment and retirement accounts, and for each one answer the same three questions.
- How does it pass to the next owner?
- Where does the control actually live?
- What is the surprise that catches people off guard?
None of this is a substitute for advice from your estate attorney or tax advisor. Think of it as a map, so that when you sit down with them, you already know the territory.
The Individual Account
How it transfers: Through your will, by way of probate, the court-supervised process for settling an estate.
Where control lives: Your will. If you have no will, state law decides for you.
The surprise: This is the one account that behaves the way most people expect, and that is exactly why it is worth understanding. A plain individual brokerage account with no beneficiary designation does not pass to anyone automatically. It waits for probate, which takes time, carries cost, and becomes part of the public record. For many families that is perfectly acceptable. For others, it is the very outcome the rest of their planning was meant to avoid.
The Transfer on Death (TOD) Account
How it transfers: Directly to the person you name, the moment you pass, skipping probate entirely.
Where control lives: The TOD beneficiary form on file with your custodian. (Banks offer a close cousin called Payable on Death, or POD, for checking and savings accounts.)
The surprise: A TOD designation quietly overrides your will for that account. During your lifetime nothing changes: you keep full control, and the named person has no rights to the money. But the day you are gone, the form governs. If it names someone you would no longer choose, or splits assets in a way your will contradicts, the form wins.
Joint Tenants With Right of Survivorship (JTWROS)
How it transfers: Automatically to the surviving owner, by operation of law, the instant one owner passes.
Where control lives: The account title itself. There is no beneficiary form to consult; ownership simply consolidates in whoever is left.
The surprise: This is where good intentions most often go sideways. A common move is adding an adult child to an account “for convenience,” so they can help with bills or step in if needed. What many people do not realize is that this makes the child a full legal co-owner today, not merely an heir tomorrow. The account can be exposed to that child’s creditors or a divorce, and when you pass, the entire account belongs to that child, regardless of what your will says about treating your children equally. A step meant to add convenience can quietly rewrite your estate.
(Worth noting: a similar-sounding title, Tenants in Common, does not include survivorship. The distinction matters, and it is easy to get wrong on a new-account form.)
The Trust Account
How it transfers: According to the terms of your trust document, with your trustee carrying out the instructions you set.
Where control lives: The trust itself, not a beneficiary form. This is often the most precise tool available, because a trust can spell out timing, conditions, and contingencies that a simple form cannot.
The surprise: A trust only governs what you actually put into it. People frequently create a trust, then never retitle their accounts into its name. The document sits in a drawer, technically valid and controlling nothing. An empty trust is a plan on paper only. Funding it, the unglamorous step of moving accounts into the trust’s name, is what gives it force.
The Retirement Account (IRA, Roth IRA, 401(k))
How it transfers: To the beneficiary named on the account, bypassing both your will and probate.
Where control lives: The beneficiary designation on file with your plan administrator or custodian.
The surprise: Retirement accounts hold more traps than any other category, for two reasons. First, the designation travels with the account, but a rollover creates a new account. When you roll a 401(k) into an IRA, the old beneficiary choices do not always come along, and the new account can default to no beneficiary at all. Second, who you name carries real tax consequences. A surviving spouse has options no one else does. Most non-spouse beneficiaries are now subject to what is known as the 10-year rule, introduced by the SECURE Act, which generally requires an inherited retirement account to be emptied within ten years. That can meaningfully change the tax bill your heirs face, and it is a subject worth its own conversation. Naming your estate as the beneficiary, meanwhile, can pull the account into probate and accelerate taxes, usually the opposite of what people intend.
Reading the whole map
Step back and a pattern emerges. Only one of these five account types, the plain individual account, actually follows your will. The other four march to their own instructions: a form, a title, or a trust document. That is not a flaw to be feared. Each of these tools exists for a good reason, and used deliberately they can pass wealth more smoothly than a will alone ever could. The trouble, when it comes, tends to arise not from the tools themselves but from a handful of avoidable missteps.
The flip side is that instructions left unattended tend to drift out of step with your life. The value of a map is knowing where you stand before you set out. Once you can see how each account transfers, the practical question becomes when to review those designations, and which moments in life should prompt a fresh look.