What Is a Series LLC? How to Form One

If you own multiple properties or run several related businesses, you’ve probably wondered about the best way to protect each one without creating a mountain of paperwork and fees. That’s where Series LLCs come in — though they’re more complex than they initially appear.

This guide covers what a Series LLC actually is, how to form one, and whether it makes sense for your situation. You’ll also learn the real costs, common mistakes, and why this structure isn’t available everywhere.

This takes about 8 minutes to read and will save you hours of research — plus help you avoid some expensive misconceptions about how Series LLCs actually work.

What You Need to Know First

Think of a Series LLC like an apartment building. You have one main structure (the master LLC), but inside you can create separate “units” (individual series) that are legally protected from each other. Each series can have its own assets, debts, members, and business purpose.

Here’s a real example: Sarah owns five rental properties. Instead of creating five separate LLCs at $100+ each, she forms one Series LLC in Delaware for $90. Then she creates five series within it — one for each property. If a tenant sues over an incident at Property A, they can’t touch the assets in Properties B through E.

Who this works best for:

Real estate investors with multiple properties
Business owners with several related ventures (like someone who owns a restaurant, catering company, and food truck)
Franchisees operating multiple locations
Investment fund managers with different investment strategies

Here’s the reality check: Series LLCs are only available in about 20 states, including Delaware, Texas, Illinois, and Nevada. If you form one in Delaware but operate in California, you’ll likely need to register as a foreign entity anyway — which can eliminate the cost savings.

This doesn’t apply to you if:

You only have one business or property
Your businesses are completely unrelated (a dental practice and a car dealership don’t belong in the same Series LLC)
You operate primarily in states that don’t recognize Series LLCs

How to Form a Series LLC — Step by Step

What to have ready before you start:

Your chosen state (Delaware and Texas are most popular)
Business name for the master LLC
Registered agent with an address in your chosen state
Names and purposes for your initial series

Step 1: Choose Your State and Check Availability

Pick a state that both allows Series LLCs and makes sense for your operations. Delaware offers strong legal protections and business-friendly courts. Texas has no state income tax. Illinois allows series to have different managers.

Check name availability through the state’s business search tool. Your master LLC name must be available, but individual series names don’t need to be pre-approved.

Time required: 30 minutes

Step 2: File articles of organization

File the Articles of Organization (the document that creates your LLC) with your chosen state. The filing must specifically state that the LLC is authorized to establish series. You can’t add this power later without amending your articles.

Most states use their standard LLC form but require you to check a box or add specific language about series authority.

Time required: 15 minutes to complete, 5-15 business days for state processing

Step 3: Create Your Operating Agreement

This is where Series LLCs get complex. Your operating agreement must establish how the master LLC works AND how individual series operate. You need to specify:

How new series get created
How profits and losses are allocated
Management structure for each series
What happens if someone wants to sell their interest

Unlike regular LLCs, skipping the operating agreement here is asking for trouble. The law around Series LLCs is still evolving, so you need clear written rules.

Time required: 2-4 hours if using a template, longer for complex situations

Step 4: Establish Individual Series

Create each series according to your operating agreement. This usually involves filing a simple notice with the state and updating your records. Each series should have:

Its own business purpose
Separate bank account
Distinct accounting records
Clear asset ownership

Time required: 30 minutes per series

Step 5: Get Your EIN and Open Bank Accounts

Apply for a federal tax ID number (EIN) for the master LLC. Depending on how you elect to be taxed, you may need separate EINs for each series.

Open separate bank accounts for each series. This is crucial — mixing funds destroys the liability protection you’re trying to create.

Time required: 1-2 hours total

What It Costs

State Filing Fees:

Delaware: $90 for the master LLC
Texas: $300 for the master LLC
Illinois: $150 for the master LLC
Most other states: $50-$200

Individual Series Fees:
Some states charge additional fees when you create each series. Texas charges $25 per series, while Delaware includes unlimited series in the initial fee.

Formation Service Costs:
Professional formation services typically charge $200-$500 for Series LLC formation, including state fees, registered agent service, and basic operating agreement templates.

Hidden Costs to Watch:

Annual registered agent fees: $100-$300 per year
State annual reports: $50-$300 per year for the master LLC
Separate EINs if needed: Free but time-consuming
Professional operating agreement drafting: $1,500-$5,000

Cost Comparison:

DIY: $90-$300 in state fees plus your time
Formation service: $300-$800 total first year
Attorney: $2,000-$5,000 for proper setup

Bottom line: Most people spend $500-$1,200 to get a Series LLC properly established, then $200-$500 annually in maintenance costs.

Mistakes That Cost People Money

Mixing Assets Between Series
This is the big one. If you use Series A’s bank account to pay Series B’s expenses, you’ve just destroyed the liability protection. Keep everything separate — bank accounts, records, contracts, insurance policies.

Assuming Other States Will Recognize the Structure
Just because you formed a Series LLC in Delaware doesn’t mean California courts will respect the series separation. Many states still treat the entire structure as one entity for liability purposes.

Not Getting Separate Insurance for Each Series
Your insurance company needs to understand your Series LLC structure and write policies accordingly. Standard business insurance might not provide the coverage you think you have.

Using Cookie-Cutter Operating Agreements
Generic templates don’t address the complex issues that arise with Series LLCs. How do you handle disputes between series? What if one series wants to dissolve? These need clear answers in writing.

Forgetting About Securities Law Issues
If you’re raising money from investors, each series might be considered a separate security offering. This can trigger complex federal and state registration requirements.

Not Keeping Detailed Records
The IRS and state agencies expect series-level financial records. If you can’t prove which income and expenses belong to which series, you lose credibility and potential tax benefits.

For International Founders

Non-U.S. citizens can absolutely form Series LLCs in any state that allows them — no visa or residency required. This structure can be particularly attractive for international real estate investors or business owners with U.S. operations.

Popular states for international founders:

Delaware: Strong legal protections and business-friendly courts that international investors recognize
Texas: No state income tax and relatively straightforward Series LLC rules
Nevada: Privacy protections and no state income tax

You’ll need a registered agent with a physical U.S. address in your chosen state. We provide registered agent services in all states that allow Series LLCs.

EIN challenges: Getting tax ID numbers for Series LLCs as a non-resident can be complex. You may need separate EINs for each series, and the IRS application process for non-residents takes 4-8 weeks by mail or fax.

Banking reality: Opening U.S. bank accounts remains the biggest challenge. You’ll need separate accounts for each series to maintain liability protection. Consider digital banks like Mercury or Relay, which are often more welcoming to international business owners.

Tax obligations: Foreign-owned LLCs (including Series LLCs) must file Form 5472 annually, with penalties starting at $25,000 for non-filing. Each series may trigger separate filing requirements. Work with a CPA who specializes in international tax — this gets complicated quickly.

FAQ

Can I convert my existing LLC to a Series LLC?
Usually yes, but it requires amending your Articles of Organization and costs the same as forming a new entity. You can’t just start calling it a Series LLC — the state needs to approve the change.

Do I need separate tax returns for each series?
It depends on your tax election. By default, all series report on one return. But you can elect to have each series taxed separately, which requires separate returns and EINs.

What happens if I do business in a state that doesn’t recognize Series LLCs?
You’ll likely need to register as a foreign entity, which means paying fees and appointing a registered agent in that state too. This can eliminate the cost advantages.

Can series have different owners?
Yes, each series can have different members with different ownership percentages. This makes Series LLCs useful for joint ventures or investor groups.

How do I dissolve just one series?
Your operating agreement should specify this process. Generally, you follow the dissolution procedures for that series while leaving the master LLC and other series intact.

Are Series LLCs recognized by bankruptcy courts?
This is still evolving. Some bankruptcy courts treat each series as separate, others don’t. The law isn’t settled, which creates risk.

Can I trademark a series name?
Yes, each series can apply for its own trademarks and intellectual property protections, assuming the name meets trademark requirements.

Do I need a lawyer to form a Series LLC?
Not required, but recommended if you have complex ownership structures or significant assets at stake. The operating agreement is more complex than a standard LLC.

Conclusion

Series LLCs can provide elegant solutions for multi-property or multi-business owners, but they’re not the simple money-saver they initially appear to be. The key is understanding both the benefits and limitations before you commit.

If you’re ready to explore whether a Series LLC makes sense for your situation, we can walk you through entity selection, state filing, EIN registration, and compliance requirements all in one place. [Get started here](https://www.businessformations.com/get-started/) and we’ll help you make the right choice for your specific needs.