The asset that isn't an account

When a solo founder thinks about what they'd leave behind, they picture things they can point to: the Stripe balance, the bank account, the domain renewing on autopay. Tangible boxes someone could open. But the most valuable thing many founders own isn't in any of those boxes. It's the business entity itself — the LLC — and it behaves nothing like a bank account when you die.

A bank account has a beneficiary or, failing that, a clear place in your estate. The money is just money. An LLC is a creature of state law, and state law has opinions about what happens to it when its only member is gone. Those opinions are often the opposite of what the founder assumed. Understanding the difference is the whole game, because it determines whether your family inherits a functioning business or watches a profitable one quietly evaporate while they grieve.

Membership interest is not the same as control

The first thing to separate is ownership from management. When you formed a single-member LLC, you became its member — the owner of the membership interest, which is the economic and governance stake in the company. You were also, almost certainly, its only manager: the person allowed to sign things, move money, make decisions.

When you die, those two roles split apart in an instant. Your membership interest is property. Like a house or a stock certificate, it passes through your estate to whoever you've named — through your will, a trust, or default inheritance law. That part usually works the way people expect.

Management does not pass automatically. The right to run the company doesn't ride along with the right to own it. Your heir may legally own 100% of the membership interest and still have no authority to log into the bank, talk to a vendor, or sign a contract until a court or the operating agreement installs them as manager. For a software business that needs someone making decisions weekly, that gap is where value bleeds out.

The default rule almost no one chose

Here is the part that surprises founders most. In many states, the default statutory rule is that the death of the sole member triggers dissociation — the member is treated as having left the company. And in a single-member LLC, the member leaving can put the company on a path toward dissolution unless something affirmatively prevents it.

State law varies, and this is exactly the kind of detail worth confirming with a lawyer in your jurisdiction rather than trusting a blog. But the pattern across versions of the Uniform Limited Liability Company Act is consistent enough to plan around: when there's no operating agreement saying otherwise, the death of the only member can leave the LLC with no member, and an LLC generally cannot exist with no members. Some states give the heirs a window — often described in terms of a fixed number of days — to agree to continue the company or admit a new member. Miss the window, or fail to take the steps, and the entity can wind down. The estate may still collect the value of the assets, but the living business — the thing customers pay, the thing with momentum — stops being a going concern.

The cruel irony is that this default isn't a punishment for negligence. It's just the rule that applies when you never wrote a different one. Most solo founders never wrote a different one, because single-member LLCs feel like a formality. You file once, you get an EIN, you move on. The operating agreement sits unwritten because, with one member, who exactly are you agreeing with?

The one document that changes the outcome

The answer to that question — who are you agreeing with — is your future heir. The operating agreement is where you write the company's own succession rules, and for a single-member LLC it does the heaviest lifting of any document you'll ever sign.

A well-drafted single-member operating agreement can name a successor manager who steps in the moment you die, so the company never has a leaderless day. It can include a transfer-on-death or continuation provision stating explicitly that the company does not dissolve upon the member's death and that the membership interest passes to a named person or trust. It can grant that successor immediate authority to act — pay AWS, answer the registered agent, keep the lights on — during the months before probate finishes sorting out formal ownership.

This is the difference between two families. One inherits an LLC that, on paper, already knew what to do: a named successor, a continuation clause, authority that activates without a courtroom. The other inherits a legal question mark and a 90-day clock they don't know is running, advised by a probate attorney who has never heard of their loved one's business and bills by the hour to figure it out.

Sole proprietors have it worse, and don't know it

If you never formed an entity at all — if you're running on your personal name and a Schedule C — the picture is starker. A sole proprietorship has no separate legal existence to inherit. It is you. When you die, the business doesn't transfer; it ends, and your individual assets (the bank account, the domain, the codebase) pass through your estate as ordinary property. There's no entity for an heir to step into, which often makes it harder, not easier, for someone to keep operating under continuity.

This matters because a lot of profitable solo SaaS runs as a sole proprietorship for years out of pure inertia. The founder means to incorporate "once it's real," and revenue arrives faster than paperwork. If that's you, the succession question and the entity question are the same question, and they're worth answering before they're answered for you.

What to actually do this quarter

The steps are unglamorous and finite. Confirm what entity you actually have — pull the formation documents, not your memory of them. If you have a single-member LLC with no operating agreement, that's the gap; an agreement with a successor-manager clause and an explicit continuation-on-death provision is the fix, and a business attorney can draft one in far less time than it took to build your product. Check your state's default rule for a deceased sole member so you know what you're overriding. Make sure the person who'd inherit the interest is named consistently across your will or trust and the operating agreement, so the two documents don't contradict each other. And write down, in plain language, where all of this lives — because the most airtight succession clause is useless if no one knows it exists.

That last point is the one founders skip. The legal architecture and the human knowledge have to travel together. Your heir needs the operating agreement and the EIN, the registered agent's name, the state filing portal, the bank login path, and a one-line explanation of what the business even does. The law decides who may act. The information decides whether they can.

Where Heirloom fits

This is the seam Heirloom was built for. It holds the documents that decide succession — the operating agreement, the EIN, the entity filings — alongside the operational knowledge your heir needs to actually use them: who steps in, where everything lives, what to do in the first week. The legal answer and the practical answer in one place, handed to the right person at the right moment instead of reconstructed under deadline. If you've been meaning to write the operating agreement you never got around to, this is a good place to keep it findable: https://heirloom.lumenlabs.works