What is a series LLC?

A series LLC is a special type of LLC that allows you to create multiple 'series' (sub-LLCs) under one parent LLC. Each series has its own assets, liabilities, and members — and the liabilities of one series are shielded from the others. Think of it as one umbrella LLC with multiple protected compartments underneath.

Which states allow series LLCs?

As of 2026, approximately 20 states allow series LLCs, including Delaware (the pioneer), Texas, Illinois, Nevada, Wyoming, Iowa, Oklahoma, Tennessee, Utah, and others. However, series LLC recognition across state lines is uncertain — not all states will respect the liability shields of a series formed elsewhere.

Is a series LLC good for real estate?

Yes, series LLCs are most commonly used for real estate investors. Instead of forming a separate LLC for each rental property, you create one series LLC with a separate series for each property. This isolates liability — a lawsuit from one property can't reach the assets of another. It's also cheaper than forming multiple standalone LLCs.

Series LLC Explained: How It Works, Pros & Cons (2026)

A series LLC lets you create multiple protected “cells” under one parent LLC — each with its own assets, liabilities, and members, shielded from each other.

Quick answer: A series LLC creates separate liability compartments under one LLC. Each series is protected from the others’ liabilities. Most commonly used by real estate investors holding multiple properties. Available in ~20 states (Delaware, Texas, Illinois, Wyoming, Nevada, and others). Cost: one filing fee for the parent LLC, plus registration fees per series (varies by state). Cross-state recognition is uncertain — this is the biggest risk.

How a Series LLC Works

Component	Role
Parent LLC (Master)	Umbrella entity filed with the state
Series 1	Separate liability shield — own assets, liabilities, members
Series 2	Separate liability shield — own assets, liabilities, members
Series 3…	Additional series as needed

Liability Shield Diagram

Scenario	Parent LLC	Series 1	Series 2	Series 3
Series 1 gets sued	Protected	At risk	Protected	Protected
Series 2 gets sued	Protected	Protected	At risk	Protected
Parent LLC gets sued	At risk	Protected*	Protected*	Protected*

*Protection of individual series from parent LLC claims depends on state law and proper maintenance.

Series LLC vs. Multiple Standalone LLCs

Factor	Series LLC	Multiple Standalone LLCs
Filing fees	One filing ($50–$300) + per-series ($0–$100)	Each LLC: $50–$300
Annual fees	One fee (varies)	Each LLC has its own annual fee
Tax returns	May file one return (IRS guidance unclear)	Each LLC files separately
Registered agent	One agent for parent	One agent per LLC
Bank accounts	Separate per series recommended	Separate per LLC
Operating agreements	One master + series supplements	Separate per LLC
Liability separation	Yes (within same entity)	Yes (separate entities)
Cross-state recognition	Uncertain	Universally recognized
Complexity	High	Moderate (more paperwork)
Cost (5 properties)	~$300–$800 total	~$500–$2,500 total

States Allowing Series LLCs

State	Year Adopted	Notes
Delaware	1996	Pioneer — most developed series LLC law
Illinois	2005	Requires public filing for each series
Iowa	2009
Nevada	2005
Oklahoma	2004
Tennessee	2006
Texas	2009
Utah	2013
Wyoming	2018
Alabama	2014
Arkansas	2017
Indiana	2016
Kansas	2018
Missouri	2018
Montana	2017
Nebraska	2020
North Dakota	2017
Puerto Rico	2010
Virginia	2019
Washington D.C.	2011

States that do NOT allow series LLCs: California, New York, Florida, and most others. However, you can form a series LLC in a state that allows them (like Delaware or Texas) and operate in any state — though whether other states will respect the internal liability shields is uncertain.

Common Use Cases

Real Estate Investment

Without Series LLC	With Series LLC
Property A in its own LLC ($200/year)	Property A: Series 1
Property B in its own LLC ($200/year)	Property B: Series 2
Property C in its own LLC ($200/year)	Property C: Series 3
Total annual: $600 (3 LLCs)	Total annual: $60–$350 (1 LLC)
3 tax returns	1 tax return (potentially)
3 registered agents	1 registered agent

Multiple Business Lines

Business	Series
Consulting practice	Series 1
Online course sales	Series 2
E-commerce store	Series 3

Formation Process

Step	Details
1. Choose a state that allows series LLCs	Delaware, Texas, Illinois, etc.
2. File Articles of Organization	Must include provision allowing series
3. Create master operating agreement	Covers parent LLC governance
4. Establish individual series	Series supplements to operating agreement
5. Maintain separate records per series	Separate bank accounts, books, contracts
6. File per-series with state (if required)	Illinois requires public filing per series
7. Get separate EIN per series (recommended)	IRS has not issued final guidance

Tax Treatment (IRS Uncertainty)

The IRS has not issued final regulations on how series LLCs should be taxed. Current positions:

Approach	Details
IRS proposed regulations (2010)	Each series treated as a separate entity for tax purposes
No final regulations yet	Proposed rules never finalized
Common practice	Many CPAs treat each series as separate for tax filing
Conservative approach	File separate returns per series
Aggressive approach	File one return for entire series LLC

Recommendation: Consult a tax professional familiar with series LLCs. The safest approach is to treat each series as a separate entity for tax reporting.

Maintaining Liability Protection

For the series liability shields to hold up in court:

Requirement	Details
Separate bank accounts	Each series must have its own bank account
Separate books and records	Track income, expenses, assets per series
Separate contracts	Contracts signed on behalf of specific series
No commingling	Never transfer funds between series without documenting
Operating agreement	Must specifically establish and define each series
Series identification	Use series name on all documents (e.g., “XYZ LLC – Series 1”)

Advantages

Advantage	Details
Cost savings	Cheaper than forming multiple LLCs
Liability separation	Each series protected from others
Administrative simplicity	One parent entity, one registered agent
Flexibility	Add new series easily
Asset protection	Isolate high-risk assets from low-risk ones

Disadvantages

Disadvantage	Details
Cross-state recognition uncertain	Other states may not respect series liability shields
Tax uncertainty	IRS hasn’t finalized regulations
Banking challenges	Some banks don’t understand series LLCs, won’t open accounts per series
Limited case law	Few court cases testing series protections
Complexity	More complex than a single LLC
Insurance complications	Some insurers don’t know how to insure series LLCs
Not available everywhere	~20 states only

When a Series LLC Makes Sense

Situation	Series LLC?
Real estate investor (3+ properties in same state)	Yes
Multiple business lines under one owner	Maybe — if in a series-friendly state
Single business, one location	No — regular LLC is simpler
Interstate businesses	Risky — cross-state recognition uncertain
Small portfolio (1–2 properties)	No — regular LLC(s) sufficient
Large portfolio (10+ properties)	Yes — significant cost savings

When to Use Standalone LLCs Instead

Situation	Why Standalone Is Better
Properties/businesses in different states	Universal recognition
High-value assets needing maximum protection	Tested legal framework
Need bank financing (mortgage per property)	Lenders prefer standalone LLCs
State doesn’t allow series LLCs	No choice
Want certainty over cost savings	Standalone LLCs are universally understood

Bottom Line

Series LLCs are a powerful tool for real estate investors and multi-business owners operating in states that support them — primarily Delaware, Texas, Illinois, and Wyoming. They save money ($60–$350/year vs. hundreds per standalone LLC) while maintaining liability separation between series. The biggest risks are cross-state recognition uncertainty and lack of IRS guidance on taxation. If maximum certainty matters more than cost savings, use standalone LLCs for each asset or business.