The series LLC, a decade in
Twenty years after Delaware wrote the statute, the form is widely adopted and still not battle-tested
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elaware enacted the series LLC in 1996. Twenty years later the structure is on the books in roughly a dozen states, a handful of proposed Treasury regulations treat each series as its own taxpayer, and practitioners still cannot tell you with confidence what happens when one of these things enters bankruptcy.
That gap — between statutory maturity and doctrinal maturity — is the whole story. The form works well for the narrow problem it was built for and poorly for everything else.
What the statute actually gives you
A series LLC is a single parent LLC that can establish one or more internal series. Each series has its own members or managers, its own assets, its own liabilities, and its own business purpose. The parent is formed with an ordinary certificate and a registered agent. The series themselves are usually established within the operating agreement, though a few states require a separate certificate of designation for each.
The statutory promise is an internal liability shield: creditors of Series A cannot reach the assets of Series B, and creditors of the parent cannot reach either, provided the series are kept as separate books and records and held out separately to the world. No additional filing with the state is required to create a new series. In Delaware, Illinois, and Texas — three of the largest series jurisdictions — the mechanics are substantially parallel, with modest variations in whether a separate certificate is needed and how the records must be maintained.
The states that have adopted some version of the form include Delaware, Illinois, Iowa, Kansas, Missouri, Montana, Nevada, Oklahoma, Tennessee, Texas, Utah, and Wisconsin, with a handful of others offering narrower protected-cell structures. The statutes are not uniform. Delaware's is terse and leaves much to the operating agreement; Illinois requires a certificate of designation for each series and treats each as something closer to a separately filed entity. Texas sits in between. A practitioner who has done a Delaware series is not automatically competent to do an Illinois one.
The appeal, on paper, is administrative. A real-estate investor with fifteen rental properties can put each one in its own series, segregate the liabilities, and pay one franchise tax instead of fifteen. A fund sponsor can spin up a new sub-fund without a new filing. That arithmetic is real. It is also the easy part.
The tax picture, still proposed
In September 2010 Treasury and the IRS released proposed regulations under Section 7701 that would treat each series of a domestic series LLC as a separate entity for federal tax purposes. Under the proposal, each series independently elects its classification — disregarded, partnership, or corporation — and files accordingly. This matched the practice that had already developed among planners and resolved a significant ambiguity about whether the whole series LLC was one partnership for federal purposes or a stack of them.
As of mid-2016, those regulations are still proposed. They have not been finalized. The preamble permits taxpayers to rely on the proposed rules in the interim, and most practitioners do, but the absence of final regulations six years on is its own datapoint. State tax treatment is messier: some states follow the federal check-the-box analysis series by series, some tax the parent as a single entity, and a few have no published guidance at all and leave the question to audit.
For a series LLC with any cross-state footprint, the tax diligence is not obviously lighter than the diligence for a stack of standalone LLCs. Each series that does business in a non-series state must typically qualify as a foreign LLC there, and the foreign state will apply its own rules about what the series even is. Some states accept the series as a separate registrant. Others do not and require the parent to qualify, which defeats much of the point.
Where the form does not hold up
Three problems recur. None are theoretical.
The first is bankruptcy. The Bankruptcy Code does not contemplate the series LLC. It defines a debtor as a person, and a series is not obviously a person separate from its parent. Whether an individual series can file its own Chapter 7 or 11, whether the parent's filing sweeps all series into the estate, whether the internal liability shield survives a trustee's administration — none of this is settled. The early commentary, including discussion around In re Dominion Ventures and related secondary literature, leans skeptical. A creditor negotiating a loan against a single series should assume that if the deal goes sideways the venue will not be as friendly to segregation as the state statute suggests.
The second is non-series states. If your series LLC owns property in a state that has not adopted the form, the courts of that state are under no obligation to honor the internal shield when applying their own law to their own real estate. Full-faith-and-credit arguments exist and are not frivolous. They are also untested in the ways that matter. A plaintiff's lawyer in a state without series legislation will sue the parent and every sibling series and argue that the structure is a bookkeeping convention, not a separation of legal persons. The argument may lose. It may also win, and the cost of finding out is a trial.
The third is creditor-side skepticism, which is less a doctrinal problem than a market fact. Institutional lenders and sophisticated counterparties have, as a group, decided they would rather deal with fifteen ordinary LLCs than one series LLC with fifteen cells. Loan documents get more expensive. Title insurance underwriters sometimes require parent-level guarantees that collapse the shield in practice. Deals close on the lender's template, not the borrower's preferred structure, and the lender's template in 2016 generally prefers standalone entities.
Who this form is actually for
A serial real-estate holder operating entirely within a series-recognizing state, holding each property for long-term rent, self-financing or using portfolio lenders who understand the structure: this is the core use case and it works. The administrative savings are real, the tax treatment under the proposed regulations is workable, and the liability segregation is at least as good as the alternative inside the home state.
A fund sponsor running a series of parallel single-investor vehicles in Delaware, where counsel is familiar and the counterparties are institutional and repeat: this also works, with careful drafting.
Everything else is harder to defend. For a venture-backed operating company with employees, debt, and customers in multiple states, the series LLC adds structural complexity to a balance sheet that will eventually be scrutinized by acquirers and underwriters who would rather see a conventional holding-company-and-subsidiaries chart. For a small operating business with one line of work, the form is overkill and the filing savings are modest.
The honest summary at the twenty-year mark is that the series LLC is a useful tool for a specific kind of asset holder and a speculative choice for anyone whose risks are large enough to end up in front of a judge who has never seen one. Until the bankruptcy courts, the foreign-state courts, and the Treasury regulations all say the same thing for a while, the structure carries an undiscountable quantum of legal-research risk that sophisticated capital has mostly decided it would rather not underwrite.
If you are forming this quarter to hold rental properties in Texas or Illinois or Delaware, the series LLC is worth the time to do it right. If you are forming to raise money or to run an operating company, pick the conventional structure and revisit the series question when the case law catches up to the statute.