What Happens to Your Business Taxes When You Die — and the Personal Liability Your Executor Never Sees Coming

What happens to your business taxes when you die? At least two returns come due, and one federal statute can make your executor personally liable. Here's the sequence.

Six weeks after the funeral, your spouse is going to do something loving, sensible, and legally catastrophic. A vendor invoice will arrive — hosting, a contractor, the design firm you owed for the rebrand — and she will pay it out of the account she now controls, because you were a person who paid your bills and she wants to keep being married to that person. She will feel briefly, quietly good about it.

Then, months later, the IRS will send a letter noting that your business owed federal taxes, that the estate no longer has the money to cover them, and that under 31 U.S.C. § 3713(b), a fiduciary who pays other creditors before the government's claim is personally liable for that payment. Not the estate. Her. Out of her own money.

That is the sentence nobody puts in the death binder. We write down passwords. We write down the accountant's phone number. We do not write down: do not pay anyone until you have paid the government, and here is why.

The estate is a taxpayer nobody applied to become

When a solo founder dies, one taxpayer ends and another one is born. Most people never learn the second one exists.

The first is you. Your final individual return — the Form 1040 for the year you died — still comes due on the ordinary deadline, the following April. It reports your income and, if you operated as a sole proprietor or a single-member LLC treated as a disregarded entity, your Schedule C business income, from January 1 through the date of death. Death does not create an extension. The calendar does not know.

The second taxpayer is your estate. From the moment of death forward, income that your business generates no longer belongs to you, because there is no you. It belongs to the estate, which is a separate legal entity with its own tax identity. That means the estate needs its own Employer Identification Number — a new one, not yours, because your EIN belonged to a person or an entity that no longer files. If the estate takes in $600 or more of gross income in its tax year, it files Form 1041, the income tax return for estates and trusts.

So picture your Stripe account. It is still charging cards. Money is still landing. Some of that revenue was earned before you died and paid out after — the tax code calls this income in respect of a decedent, and it gets treated differently from revenue the estate earned on its own. Some of it was earned entirely after. The MRR line on your dashboard is one number. To the tax code it is two or three different animals, and someone has to tell them apart, retroactively, using records only you knew how to read.

The order of operations that protects your family

Here is the part that a will does not do. A will says who gets what. It does not tell the person holding your assets what sequence to do things in. And in estate administration, sequence is nearly everything.

The fiduciary — your executor, personal representative, administrator, whatever your state calls the person left holding the bag — has a duty to pay the estate's debts before distributing anything to beneficiaries. Federal claims sit near the front of that line. When a fiduciary pays a lower-priority creditor, or hands your brother the $40,000 he's owed under the will, while a known federal tax debt goes unpaid and the estate goes dry, that fiduciary can be held personally liable up to the amount they paid out. The statute has been on the books, in one form or another, since the eighteenth century. It is not obscure to tax professionals. It is completely invisible to a grieving spouse with a laptop and a stack of envelopes.

There are three specific forms that exist almost entirely to protect this person, and almost nobody's binder names them.

Form 56 notifies the IRS that a fiduciary relationship exists — that this person, not you, is now the one the agency should be talking to. Without it, notices go to a dead man's mailbox.

Form 4810 is a request for prompt assessment. Normally the IRS has three years to assess additional tax on a return. Filing Form 4810 asks the agency to do it within eighteen months, which lets the estate close in a human timeframe instead of hanging open for years while your family waits to find out whether they can bury the business.

Form 5495 requests discharge from personal liability for the fiduciary. It is, quite literally, the form that says I have paid what was owed; please confirm I am not on the hook.

None of these are exotic. Any competent estate attorney or CPA knows them. The failure mode is not ignorance among professionals. It is that your family does not know to hire the professional, because they do not know there is a category of problem here at all. They think the business is a sad, quiet thing that will simply stop.

Why the business makes this worse than an ordinary death

A salaried employee dies and their tax situation is legible. A W-2 arrives. The numbers are on it. The final return practically writes itself.

A solo founder dies and the tax situation lives in your head, distributed across a Stripe dashboard, a business checking account, a personal card that quietly paid for the AWS bill, a 1099 you were going to send to a contractor in Lisbon, a state where you registered for sales tax two years ago and haven't thought about since, and a quarterly estimated payment schedule that only you knew you were behind on.

Estimated taxes are the sharpest edge. If you were setting aside money for a quarterly payment and died in March, the estate owes that money, but the money looks like cash in an account. It looks available. It looks like exactly the reserve your family should use to keep the lights on while they figure out what to do. Every dollar of it is spoken for, and no label on the account says so.

And if you had employees or contractors and payroll taxes were withheld and not remitted, the responsible-person exposure under the trust fund rules can follow whoever steps in and keeps operating the business. Someone trying to be helpful — keeping the payroll running, keeping the customers served — can walk into a liability they did not create.

This is the cruelty of it. Every instinct a loving person has in the first month after a death — pay the bills, honor the debts, keep it running, take care of people — is the exact instinct that creates the exposure.

Your next moves

Write one page titled "Before You Pay Anyone." Put it at the front of your estate documents, above the passwords. First line: Do not pay any business creditor, contractor, or beneficiary until a CPA or estate attorney has reviewed what is owed to the IRS and the state. Name the specific CPA. Include their phone number and the fact that they have your prior-year returns.
Email your CPA today and ask one question: If I died tomorrow, what would you need from my family in the first thirty days? Save the reply verbatim into your estate file. That email is a better continuity document than anything you'll write from memory.
Find your last three quarterly estimated payments and your unpaid tax reserve. Write down, in dollars, how much of the money currently sitting in your business account is not yours. Update that number the same week you make each estimated payment. Put it where the money is.
List every jurisdiction you have a tax registration in — federal, home state, any state where you registered for sales tax or nexus, any foreign entity. Include the login and the registration number. Your family cannot close accounts they cannot find, and unfiled returns accrue penalties in the dark.
Name the three forms in your instructions: Form 56, Form 4810, Form 5495. You do not need to explain them. You need your executor's attorney to see the words and recognize them. That single line can be worth more than the rest of the binder.

One caveat worth stating plainly: this is a description of the U.S. federal landscape, not tax advice, and the details of your entity, state, and situation matter enormously. The point is not that you should file these forms yourself. The point is that your family needs to know these questions exist before they touch a dollar.

What a binder can't hold

The deep problem is that tax obligations are not documents. They are relationships between numbers over time — what was earned when, what was withheld, what was owed, what was paid. A folder of PDFs cannot express that. A person in the second month of grief cannot reconstruct it. And you, the only person who could, are the reason it's needed.

Heirloom exists for exactly this gap: not a place to dump files, but a structured handoff — your entity details, tax registrations, the reserve that isn't yours, your CPA's name, the sequence of who must be consulted before anyone spends anything — held together so that the person opening it is reading instructions rather than performing an excavation. The vault, the beneficiaries, and the order of operations, in one place, updated as your business changes.

If you've been meaning to write it all down and haven't, start with the one page. You can do that this afternoon. And if you want somewhere to put it that your family will actually find — heirloom.lumenlabs.works is there when you're ready.