Series LLC vs. Holding Company: Are You Protecting Your Business or Creating More Risk?

Neither structure automatically shields you. Holding companies have well-constructed liability walls, but for every entity you add, there are costs, filings, and taxes. A series LLC has lower costs, is easier to form, and has fewer bureaucratic hurdles, but is riskier and newer. Both fail when money is freely moved between units.

The choice between a series LLC and a holding company reflects founders’ need to contain a bad contract, a lawsuit, or a failing venture. A holding company uses legally formed entities, and a series LLC uses cells, which are cheaper to form but rest on newer laws. For a definition of a series LLC, check out what a series LLC is.

Where does a series LLC vs. a holding company protect you?

How a series LLC protects you

A series LLC is a single entity. Articles need to be amended to form a series. The first is called the parent, and each subsequent cell is named as such. So, “XYZ LLC Series A.” A judgment against Series A does not touch Series B.

How a holding company protects you

A holding company is a parent company, usually an LLC or corporation, that controls a group of subsidiaries. Control is usually a majority interest, and most founders control 100% of the parent. A suit against a subsidiary does not touch the parent.

	Series LLC	Holding company
Legal entities	One, with internal series	Parent plus separate subsidiaries
Source of protection	State series statute and operating agreement	Separate legal entities
Court history	Thin	Long and well-tested
Availability	About 22 states plus DC and Puerto Rico	All 50 states
Can the parent operate?	Yes, the master can run a business	Usually holds only
Main risk	Walls are not honored outside the statute	Fees and paperwork multiply per entity

Where does a series LLC create more risk?

The protection the laws afford is still thin. Courts have yet to decide whether creditors of a series can reach the assets of another series. There is little protection for a series that holds property in a state that does not recognize series statutes. California does not allow domestic series, but permits properly formed series from other states to register.

There is pushback. Many banks require a state certificate and a separate EIN for each series and will refuse to open an account for a series if these are not provided. Lenders require the master LLC to be the borrower to collapse the cells.

The walls of a master can be undone. The master can run a business, and if it does, any assets it holds are exposed to the business’s creditors. Check the title of any assets to determine if they are held in the name of a series or of the master.

It is okay for series to share costs; it is not okay for series to share accounts. Series can split duties and expenses. Shared records and bank accounts can increase your liability exposure.

Why does a holding company cost more to run

What creates greater risk? Each subsidiary is treated as a separate entity, and paperwork must be filed for each. Each must have a registered agent, bank account, and set of records. Each must file reports with the state. If a subsidiary operates in California, it must pay the $800 minimum franchise tax.

Tax forms for non-resident owners

Non-resident owners deal with a stack of IRS forms. An LLC wholly owned by a foreign individual, either directly or through other disregarded entities, files a Form 5472, and a pro-forma of a U.S. Federal income tax return (Form 1120), for any reportable transaction. Capital contributions, loans, and distributions all trigger this reporting requirement. The penalty for failing to file is $25,000 per form, which is filed on paper or by fax.

Where the parent becomes the weak point

The parent can be the weak point. If the parent signs contracts for the subsidiary, guarantees the subsidiary’s debts, or commingles the parent’s and the subsidiary’s funds, a court can find the two organizations to be one and the same.

Foreign registration is often overlooked. A Delaware subsidiary doing business in New York, for example, needs to register as a foreign LLC in New York.

What does each structure cost as of October 2026?

State	Master LLC filing	Series-specific costs
Delaware	$110	Protected series: no extra filing or tax. Registered series: $110 filing plus $100 annual tax. Master owes $400 in annual tax due June 1.
Texas	$300	Protected series need no extra state filing
Illinois	$400	$50 per Certificate of Designation; annual report $75 plus $50 per series

Under HB 400, Delaware raised its annual tax on LLCs from $300 to $400, effective in the 2026 tax year, with the first payment due on June 1, 2027. The state also increased the tax on registered series from $75 to $100.

Five-entity comparison by state:

• Texas: Five separate LLCs cost $1,500, and a Series LLC costs $300, making the Series LLC the more economical option.
• Illinois: Five standard LLCs cost approximately $ 750 to form ($ 150 each) and $ 375 to retain ($ 75 each), for a total of $1,125 for the year, compared to a master LLC plus four Series costing approximately $600 to form and $275 to retain, totaling $875 for the year.
• Delaware: Five standard LLCs cost $2,000 to maintain per year. One Series LLC with protected series costs $400, and one Series LLC with four registered series costs $800.

How does each entity interact with the IRS and FinCEN?

The IRS never finalized its 2010 proposed rules on series; therefore, any series with employees or a bank account would need to apply for an EIN. Each subsidiary would also need to apply for an EIN, as would the Series LLC if it did not have a founder’s Social Security number. The IRS gives EINs by fax within four business days or by mail in about four weeks, and international customers can apply by phone.

On the BOI, FinCEN’s final rule from August 2026 permanently exempts companies formed in the U.S.; therefore, neither structure would file a report. Companies formed outside the U.S. and registered to do business in the U.S. would still be required to file a report.

A C-corporation’s dividends received deduction allows a 100% exclusion of qualifying dividends received from a corporate subsidiary in the same affiliated group. An LLC just passes the income to the owner.

How do you set up each structure while keeping the walls strong?

Holding company

When creating the parent, Delaware, home to more than 2 million entities, is a top choice for future investors, and Wyoming is common for non-residents.

1. In the US, form the parent LLC and get its EIN.
2. Form each subsidiary and get its EIN.
3. For each subsidiary, create an operating agreement and name the parent as the sole member.
4. Have each subsidiary register to do business in the state where it isn’t located.
5. For each entity, open a separate business bank account and get a registered agent.

Series LLC

1. Choose a name ending in LLC and confirm the state allows for Series.
2. Appoint a registered agent in the state.
3. Create the Series with formation documents.
4. Create an operating agreement for each Series.
5. For each Series, create and maintain its own assets and debts.
6. Make the required filings for each state. Illinois has a standard processing time of 7-10 business days, and Delaware offers expedited processing. File all documents with the IRS to get an EIN at the same time to speed up the process.

Which mistakes cancel the protection?

• Commingling. When you combine funds, you erase the boundaries between structures. Keep your bookkeeping separate for each.
• Signing the wrong name. A contract signed by a parent or master binds the parent or master.
• Starving a subsidiary. Courts view unfavorably units that cannot meet their financial obligations.
• Using a series where the law doesn’t apply. The series statute protects only the series in which it is enacted.
• Lapsed annual filings. Failing to maintain annual filings causes a series to lose its good standing.

What’s your risk profile?

Choose a series LLC if you plan to rent in one state, your assets are largely the same, and your bank and lender agree. Our series covers rental properties in more detail.

Choose a holding company if you plan to operate unrelated businesses, raise money, or sell your business, or if you live outside the U.S. A C Corp as a parent company is a better choice if you expect to have a priced round. If you run a small business, see our post about operating multiple businesses as one LLC.

Send us your states, owners, what each entity will hold, and we’ll give our assessment of your risks, costs, and structure before you pay a state fee. Our company formation team in the U.S. can help get you started.

Series LLC vs. Holding Company: Frequently Asked Questions

Is a series LLC more risky than a holding company?

In most cases, yes. The holding company costs more to maintain, but uses entities that courts understand.

Can a series LLC function like a holding company?

Yes. In practice, a parent LLC can sit above cells and hold them. The difference is that the cells in a series LLC are not separately filed entities.

Is a series LLC better than a regular LLC?

It is better from a cost perspective if you intend to form many LLCs, and fees add up. However, some owners prefer to keep LLCs separate for greater certainty.

Can an LLC function as a holding company?

Yes. Many holding companies are formed as LLCs because they are easy to maintain, offer a degree of privacy, and protect owners from personal liability.

Can a non-resident use either structure?

Yes. Expect the same EIN and Form 5472 duties as any foreign-owned LLC, plus additional bank scrutiny for a series.