You do not need multiple LLCs for multiple businesses. A single LLC can legally run several business lines, usually under different trade names, and the law does not force you to split them up. Whether you should use one entity or several comes down to how much liability each venture carries, what the extra filings and tax returns will cost you every year, and how you want your taxes to flow. Most owners pick from four realistic structures: one LLC operating under multiple DBAs, a separate LLC for each business, a holding company with subsidiaries, or a Series LLC in the roughly 20 states that authorize them.
When One LLC With DBAs Is Enough
The simplest setup is running everything through a single LLC. Each business that operates under a name different from the LLC’s registered name gets a “Doing Business As” registration filed with your state or county. Filing fees usually run $10 to $150, with most jurisdictions landing between $20 and $50. The DBA tells the public which LLC is actually behind each brand.
Taxes stay simple. The IRS treats every business line as one taxpayer because they share a single Employer Identification Number. All revenue and expenses land on one set of forms. A single-member LLC reports it all on Schedule C; a multi-member LLC files one partnership return on Form 1065.1Internal Revenue Service. Single Member Limited Liability Companies
The trade-off is that every business line sits inside the same pool of assets and liabilities. A creditor who wins a judgment against one venture can go after bank accounts, equipment, and receivables belonging to any other line operating under the same LLC. For low-risk work like consulting, freelance design, or content creation, that shared exposure is usually tolerable. Pair a catering operation with a rental property under one LLC and the math gets uncomfortable fast.
When Separate LLCs Are Worth the Cost
Giving each venture its own LLC gives it its own legal identity, its own EIN, and its own asset pool. A judgment against LLC “A” generally cannot reach the bank account or equipment owned by LLC “B.” That firewall is the entire point, and it earns its keep when at least one of your businesses carries real liability exposure.
The overhead is real. State formation fees run from about $35 to $500 per entity, and annual report or renewal fees range from $0 to $500 depending on the state. Each LLC needs a registered agent, and each separately taxed entity needs its own return. Two LLCs can add $500 to $1,500 a year in overhead before accounting fees. Five can push past $3,000.
Separate entities also require discipline. Each one needs its own bank account, its own books, and its own contracts. The moment you start paying one LLC’s bills from another LLC’s account, you create exactly the commingling courts look for when deciding whether to ignore the LLC structure entirely. This is where most multi-entity owners slip in practice, and it is the fastest way to lose the protection you paid for.
The Holding Company Route
A holding company structure puts a parent LLC at the top, with each operating business organized as a subsidiary LLC underneath it. The parent is listed as the sole member of each subsidiary in its operating agreement. The parent often holds the most valuable assets, including intellectual property, real estate, and major equipment, while the subsidiaries handle daily operations and customer-facing risk.
For taxes, a single-member subsidiary LLC is treated as a disregarded entity by default. Its income and expenses roll up onto the parent’s return as if it were a division, not a separate taxpayer, unless you file Form 8832 to elect corporate treatment.1Internal Revenue Service. Single Member Limited Liability Companies You get consolidated reporting while keeping legal separation between entities.
One rule trips up holding-company owners more than any other: transactions between the parent and its subsidiaries must be at arm’s length. If the parent licenses intellectual property to a subsidiary or lends it money, the price or interest rate has to approximate what unrelated parties would charge. Under 26 U.S.C. ยง 482, the IRS has broad authority to reallocate income between related entities whenever it finds the pricing does not clearly reflect each entity’s actual income.2Office of the Law Revision Counsel. 26 USC 482 – Allocation of Income and Deductions Among Taxpayers Informal handshake deals between your own companies draw scrutiny.
The Series LLC Option
A Series LLC lets you create separate “series” or “cells” inside a single master LLC. Each series can hold its own assets, have its own members, and pursue its own business purpose, all under one filing with the secretary of state. When the record-keeping rules are met, the debts of one series cannot be enforced against the assets of another. It costs less than forming entirely separate LLCs because you file and pay formation fees once for the master entity.
The catch is availability. Only about 20 states and territories currently authorize Series LLCs, with Delaware and Texas among the most commonly used. If you form a Series LLC in one of those states but do business in a state without a Series LLC statute, the walls between your series may not hold. Courts in the second state have no local law requiring them to honor the separation, and some states that allow foreign Series LLCs to register still provide no statutory guarantee that the series will be treated as distinct. For an owner operating across state lines, that uncertainty can erase the savings.
Even within a state that authorizes the structure, the protection depends on strict record-keeping. Each series must maintain its own books, its own asset records, and its own accounting, separate from both the master LLC and every other series. The operating agreement has to contain specific language about liability separation. Skip any step and a court can treat the whole thing as one undivided entity.
What Each Added Entity Costs You
Beyond the first LLC, budget for the following per additional entity:
- State formation filing: a one-time fee, typically $35 to $500.
- Annual report or renewal fee: $0 in roughly a dozen states up to $500 in the most expensive, with a national average around $90.
- Registered agent: required in every state where the LLC is formed or qualified. Professional services run $50 to $300 per year per entity.
- Tax preparation: each separately taxed LLC needs its own return. Expect $300 to $1,000 per entity for a CPA-prepared return.
- Foreign qualification: if an LLC does business in a state other than where it was formed, registration fees typically run $100 to $300 per state, plus the ongoing annual fees in that state.
A Series LLC can trim some of these because formation and annual fees apply to the master entity in most states that offer the structure. The savings shrink once you factor in legal work to draft a compliant operating agreement and the risk that other states will not honor your series boundaries. For owners with two or three businesses, separate LLCs are often the cleaner choice despite costing more. For an owner managing a dozen rental properties or franchise units, the Series LLC or holding-company model starts to pay off.
Keeping the Liability Shield Intact
No structure protects you if you treat the entities as one operation. Courts will “pierce the veil” and let creditors reach assets across your LLCs when the evidence shows the separation was only on paper. The factors that come up over and over:
- Commingling funds: paying one LLC’s expenses from another LLC’s bank account, or depositing revenue into the wrong entity’s account.
- Undercapitalization: forming an LLC with no meaningful assets of its own, so it could never pay a claim independently.
- Ignoring formalities: never holding meetings, never documenting major decisions, using one operating agreement for what are supposed to be separate companies.
- Treating the entity as personal: running personal expenses through the business account or withdrawing cash without documenting it as a distribution.
The fix is simple in concept and tedious in practice. Every LLC gets its own bank account, its own bookkeeping, its own contracts, and its own paper trail. When money moves between related entities, document it as a loan or a payment for services with real terms. Judges look at whether the entities function as separate businesses day to day, not whether the filing cabinet looks tidy.
Tax Rules That Change Once You Own More Than One Entity
The Qualified Business Income Deduction
Section 199A lets owners of pass-through businesses, LLCs included, deduct up to 20 percent of their qualified business income. The One Big Beautiful Bill Act made the deduction permanent, so it applies for 2026 and beyond.3Internal Revenue Service. Qualified Business Income Deduction Aggregation rules let you combine multiple businesses when calculating the deduction, which helps when one business has significant W-2 wages (a factor in the deduction cap) and another does not. Aggregation is optional and must be elected on your return, so run the numbers both ways before filing.
Controlled Group Rules for Retirement Plans
If you own 80 percent or more of multiple businesses, the IRS treats all of them as a single employer for retirement-plan purposes. You cannot set up a generous 401(k) for one LLC and exclude employees of another LLC you control. All employees across the group must be counted together for coverage, vesting, and contribution limits.4Internal Revenue Service. Controlled and Affiliated Service Groups Owners who plan to offer retirement benefits to some employees but not others often discover this rule during a plan audit.
Payroll Across Related Entities
When employees work for more than one of your related LLCs, payroll taxes stack because each entity applies the FICA and FUTA wage bases independently. The common-paymaster rules under IRC Section 3121(s) let you designate one entity to run payroll for all of them, applying the wage base once per employee. The designated paymaster has to actually disburse all wages, maintain the payroll records, and meet specific “related corporation” tests.5Internal Revenue Service. Common Paymaster Even a few employees crossing between entities can mean thousands a year in duplicate Social Security taxes if you don’t use it.
Matching the Structure to Your Situation
A single LLC with DBAs works well when every venture is low-risk, closely related, or too small to justify separate filings. Freelancers picking up projects under different brand names, or small e-commerce operators in adjacent niches, rarely need more.
Separate LLCs make sense when at least one business carries meaningful liability exposure. Construction, food service, rental property with tenants, or anything involving physical products are the usual candidates. The goal is to keep a lawsuit or bankruptcy in one venture from pulling down the others. If the combined cost of maintaining separate entities is small compared with the assets you are protecting, separation is the right call.
The holding company route fits owners who want centralized control and asset protection in one package. Parking real estate or intellectual property in the parent while subsidiaries handle operations is a proven way to shield your most valuable assets. The intercompany documentation and arm’s-length pricing are the price of admission.
A Series LLC is worth considering if your state authorizes it, your businesses operate primarily within that state, and you are managing enough ventures that the filing-fee savings matter. If your operations cross into states without Series LLC statutes, the liability protection becomes uncertain enough to undermine the point.