Series LLCs: The Half-Recognized Structure

A series LLC sounds like an obvious win. One parent entity creates an unlimited number of internally-insulated "cells" or "series", each holding its own assets and liabilities. Fewer filings, less administrative overhead, comparable liability protection to separate LLCs. So why doesn't everyone use them? Because only about twenty states recognize them — and the law on what happens when liability crosses a state line is genuinely unsettled.

States that recognize series LLCs

As of 2026, series LLCs are explicitly authorized in: Alabama, Arkansas, Delaware, District of Columbia, Illinois, Indiana, Iowa, Kansas, Missouri, Montana, Nebraska, Nevada, North Dakota, Oklahoma, Puerto Rico, South Dakota, Tennessee, Texas, Utah, Virginia, and Wyoming. Other states have varying levels of recognition, hostility, or silence.

Tier-one jurisdictions for serious users

• Delaware — original series LLC statute, most case law, strong charging-order protection.
• Texas — robust statute, very landlord-friendly, no state income tax.
• Nevada — strong asset protection statutes, no state income tax, but $350 annual filing.
• Wyoming — low cost, strong privacy, no state income tax.

The cross-border problem

Imagine you form a Delaware series LLC. Series A holds a rental in Texas (series-LLC-friendly). Series B holds a rental in California (no series LLC statute and an $800 minimum tax per LLC).

If a tenant in California sues, will the California court honor the inter-series liability shield? The honest answer: nobody knows for sure. The "internal affairs doctrine" suggests Delaware law should govern the LLC's internal structure, but California's franchise tax board has historically taken aggressive positions on out-of-state LLCs doing business in California, and there's limited case law on what happens when a California plaintiff challenges the series shield.

A traditional structure — one Delaware parent LLC owning multiple Delaware child LLCs, each registered as a foreign LLC where it does business — is more defensible across jurisdictions, but more expensive to maintain.

Where series LLCs make sense

The structure is most defensible when all activities stay inside states that recognize series LLCs. Real-world fit:

• Texas landlord with 5+ properties all in Texas. Single TX series LLC, each property in its own series. Strong fit.
• Multi-state portfolio across recognizing states (TX, NV, DE). Defensible.
• National portfolio crossing into non-recognizing states (especially CA, NY). Use traditional parent-child structure instead.

Cost comparison

For a 5-property landlord in Texas:

• Series LLC: ~$300 to form the master, ~$0 per series, one annual franchise filing. Total: ~$300 setup, ~$300/year ongoing.
• 5 separate LLCs: ~$300 × 5 = $1,500 setup, ~$300 × 5 = $1,500/year ongoing.

The savings compound as you add properties. Once you cross into non-recognizing states, the calculation flips.

Federal tax treatment is also unsettled

The IRS issued proposed regulations in 2010 treating each series as a separate entity for federal tax purposes, but those regulations were never finalized. Most practitioners treat each series as a separate entity (separate EIN, separate tax filings) to be safe. Some treat the entire series LLC as a single entity. There's professional disagreement here.

The pragmatic recommendation

If your entire footprint is inside one or two series-LLC-friendly states, the structure earns its keep. If you have any meaningful exposure to California, New York, or other non-recognizing jurisdictions, use traditional parent-child LLCs and accept the higher overhead.

For the parent-child architecture and charging-order mechanics, see our asset protection pillar guide.