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.
WealthVieu researches and writes data-driven personal finance guides using primary sources including the IRS, Bureau of Labor Statistics, Federal Reserve, and Census Bureau.
The content on Wealthvieu is for informational purposes only and should not be considered financial, tax, or investment advice. Consult a qualified professional before making financial decisions. Full disclaimer · Editorial policy
