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Library · small business · Published 10/12/2026 · Re-read against its sources 10/12/2026

series llc and asset protection basics

A series LLC creates compartments inside one company to separate assets and debts, but the walls only work in states with a series statute and only if you keep strict records and separate accounts.

In short

A friend of mine once bought a rental house in his own name and slept fine until a tenant slipped on the steps. If you own a few small things that could each cause trouble, you have probably wondered whether one company can wall them off from each other. A series LLC is a company that tries to do exactly that, and only some states allow it. Whether your state has a series statute is the first thing worth knowing before anyone spends a dime. The rules for keeping each series apart are written in that statute and nowhere else. Separate books and separate bank accounts for each series, from day one, are what give the walls any strength. A licensed attorney in the state can say how courts there treat the idea, since the answer differs from place to place.

The whole of it

What it is

I once watched a neighbor build a row of small storage sheds, each with its own padlock, so one break in would not empty the lot. A series LLC works on a similar hunch. It is one limited liability company that creates smaller compartments inside itself, often called series or cells. Each compartment holds its own assets, such as a rental house, a food truck, or a set of equipment. The hope is that a debt or lawsuit tied to one compartment cannot reach the others.

You have probably heard that this saves money. One filing can replace several, which sounds fine if you own a handful of small properties or ventures. That is the pitch, and for some people it fits. The catch is that a series LLC is a creature of state law. Some states have a statute that describes it. Some do not. A state with no statute may not recognize the walls at all.

The Uniform Law Commission has published a model law for this kind of company, the Uniform Statute on Series of Unincorporated Business Entities. Each state that allows series LLCs wrote its own version, so the details differ. Think of the model law as a pattern and each state as a tailor who changed the sleeves.

How it works

If you are holding a few assets and wondering how the walls get built, here is the plain version. The company files its formation papers with the state. The operating agreement then creates each series and names which assets belong to it. The agreement has to say that each series keeps its own records, its own assets, and its own debts.

The state statute usually asks for a few things. The company must keep separate records for each series. It must hold each series' assets apart from the others. The papers filed with the state often have to say that the company is a series LLC. A series that skips these steps may lose the protection it hoped for. Courts watch whether the owner treated each cell as its own business or just moved money around at will.

Here is where I got humble about the whole thing. A wall on paper is only as strong as the habits behind it, and I have seen more than one owner learn that the hard way. If one bank account pays the bills for every series, a judge may see one big pool of money and ignore the cells. Separate accounts, separate insurance, and separate leases help the story hold together. Habits matter. Paperwork alone does not carry the day.

There is also a quiet question about other states. A series LLC formed in a state with a statute may own property in a state with none. A court in the second state may not honor the walls. Nobody can promise how that turns out. Good attorneys will tell you the law here is unsettled, and I admire a professional who says so out loud.

The numbers, and where to find yours

If you are about to form one, you will meet a few numbers. The first is the state filing fee for forming the company. Your Secretary of State, or whichever office handles business filings in your state, posts the current fee on its website. Some states also charge a fee for each series. Others charge one fee for the whole company. Each state posts its own fee schedule, and the amounts change from time to time.

Some states charge an annual report fee or a franchise tax. A few charge a flat yearly amount just for existing. The business filing office of your state lists these. A friend's story is a poor guide, because a friend in another state faces a different bill.

On the federal side, the IRS explains how an LLC is taxed in its guidance on limited liability companies and in the instructions for Form 8832, the form a company uses to choose how it is taxed. Whether a series is taxed apart from the company can turn on how it is set up and what it elects. The IRS website shows the current status and the exact wording of its guidance on series LLCs. The rule that limits how much of a loss an owner can deduct, or any limit set by law, is listed on the IRS site as the current figure, which the official source publishes each year. The verified figure sits there, and a number from memory can be out of date.

A worked example

Let me tell you about a woman named Marisol, who runs a small cleaning business in a state that has a series statute. She also owns two small rental houses. She is careful and a little nervous, which is a fine way to be with money.

Marisol forms one series LLC and creates three series. Series A holds the cleaning business and its van. Series B holds the first rental house. Series C holds the second rental house. Each series gets its own bank account and its own insurance policy.

Say the first rental house earns $1,200 a month. Over a year that is 12 months at $1,200, which is $14,400. Her costs for that house, such as repairs and insurance, come to $5,000 a year. So Series B nets $14,400 minus $5,000, which is $9,400 for the year.

Now say a tenant in the second house sues after a fall. In the best case, the lawsuit can reach only the assets inside Series C. Marisol's cleaning van in Series A and her first rental in Series B stay out of it. That is the hope behind the whole design.

Here is the catch. Suppose Marisol paid the plumber for the second house from the Series A account because it was handy. That small shortcut gives the other side something to argue. A court might say the cells were never truly separate. She meant no harm, but the habit weakened the wall. Sloppy bookkeeping can undo good planning. A few extra minutes each month would have protected her.

Where it goes wrong

I have seen smart people trip on the same few stones. The first stone is assuming every state treats a series LLC the same way. A state with no statute may refuse to honor the cells. The owner then has one company and one pool of risk, plus a more complicated bill to pay.

The second stone is mixing money. When accounts blur together, courts may blur the series too. Courts look for each cell's cash, records, and contracts to stay apart.

The third stone is forgetting insurance. An LLC is not a substitute for insurance. The company's walls do not stop a claim from being filed. Insurance pays for many everyday accidents, while the legal structure only decides whose assets can be reached. An insurance professional can explain what coverage each series might carry.

The fourth stone is lenders. A bank that loans money for a property may require the owner to sign a personal guarantee. The guarantor must then repay if the series cannot, so the personal assets are on the line no matter how the walls were built. The loan papers spell out who is on the hook.

The fifth stone is taxes. The IRS may treat the series in ways that surprise an owner, and state tax offices may too. A tax professional can explain how your state and the IRS will see your setup. It is cheaper to ask first.

Last, remember that a series LLC does not protect a person from his or her own wrongdoing. If someone commits fraud or personally causes harm, a company structure will not shield that person.

Questions to answer before you leave this page

Does your state have a series LLC statute, and have you read it yourself? Which assets would go into each series, and would each one truly earn or hold its own money? Are you ready to keep separate bank accounts, separate books, and separate insurance for every series, every month, without cutting corners? Have you checked the filing fee, the annual fee, and any per series charge with your state business filing office? Do you know how the IRS will treat your company, and have you looked at its guidance on LLCs and Form 8832? Will you own property in another state, and have you asked an attorney how that state treats a series formed elsewhere? Would a lender ask for a personal guarantee that sets the walls aside? And have you asked a licensed attorney and a tax professional in your own state to look over your plan before you sign anything?

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