More than two thirds of all new business entities registered in the United States are limited liability companies. Not corporations, not partnerships: LLCs. The structure did not even exist nationally until the 1990s. It now dominates because it solved a real problem. It gave small business owners corporate-grade liability protection without corporate-grade paperwork or double taxation.
This guide explains what an LLC actually is, in plain language. You will see how the liability shield works and where it fails. You will see how the IRS treats LLC income. You will see what the structure costs to create and maintain. You will see the major LLC variants, and the honest cases where an LLC is the wrong tool.
The Definition, and How an LLC Actually Works
A limited liability company (LLC) is a business entity created under state law. It legally exists separately from its owners. The company signs contracts, owns property, borrows money, and gets sued. The owners do not do those things personally. Owners are called members. Ownership shares are called membership interests. The document that creates the entity is called the Articles of Organization. You file it with a state agency, usually the Secretary of State.
Three design choices define the structure:
It is a creature of state law. There is no federal LLC. You form in a specific state, follow that state's statute, and pay that state's fees. An LLC formed in Ohio is an Ohio LLC. If it later operates in Michigan, it registers there as a foreign LLC. This is why choosing a formation state is a real decision.
It separates liability, not taxes. The entity shields personal assets from business creditors. But by default the IRS ignores it completely for income tax purposes. Profits land on the members' personal returns either way. Liability separation and tax separation are independent dials. That is precisely what makes the LLC flexible.
It runs on contract, not statute. Corporations must follow rigid statutory governance: boards, officers, annual meetings, minutes. An LLC's internal rules live in a private contract called the operating agreement. Members can arrange ownership, management, and profit splits almost any way they agree to.
What "Limited Liability" Actually Means, and Where It Fails
If the business cannot pay its debts or loses a lawsuit, creditors can take what the business owns. That means its bank account, equipment, and receivables. What they generally cannot take is what you own personally. That means your house, personal savings, car, and retirement accounts. Your losses are limited to what you put into the company. That is the entire meaning of "limited liability."
The shield is real. It is also narrower than most founders assume. The exceptions matter more than the rule:
Six things the LLC shield does not protect you from
- Personal guarantees. Banks and landlords routinely require them from small LLCs. A guaranteed debt is your debt, entity or not.
- Your own wrongdoing. You always answer personally for your own negligence, malpractice, or fraud. The LLC protects you from the business's liabilities, not from your own conduct.
- Trust fund taxes. Payroll taxes withheld from employees and unremitted sales tax follow the responsible person individually.
- Commingling. Run personal spending through the business account and a court can "pierce the veil" and treat the LLC as your alter ego.
- Undercapitalization plus formality failures. An entity with no operating agreement, no records, and no real assets invites veil-piercing arguments.
- Administrative dissolution. Miss annual reports long enough and the state erases the entity, and the shield with it.
The practical lesson: you do not buy the shield once at formation. You maintain it. That takes a separate bank account, an operating agreement, adequate insurance, and on-time state filings. Compliance monitoring exists to automate the last part.
Form your LLC
We prepare it, file it with the agency, and confirm it came back accepted. Or keep reading and file it yourself; this guide covers both.
How LLCs Are Taxed
By default, an LLC pays no federal income tax itself. The IRS classifies it based on its member count and taxes the owners directly:
| LLC type | Default IRS treatment | Where income is reported |
|---|---|---|
| Single-member LLC | Disregarded entity | Schedule C on the owner's Form 1040 |
| Multi-member LLC | Partnership | Form 1065 + Schedule K-1 to each member |
| LLC with S election | S corporation | Form 1120-S + K-1s; owner takes a salary |
| LLC with C election | C corporation | Form 1120; entity pays 21% corporate tax |
Active members also owe 15.3% self-employment tax on their share of profits. That number eventually drives profitable LLCs toward the S-corp election. Pay yourself a reasonable salary, and the remaining distributions escape self-employment tax. The full picture is in our LLC taxes guide, including state-level franchise taxes and quarterly estimates.
None of that is elective. Classification follows the member count from the day the entity exists, under the default rule in Treas. Reg. 301.7701-3(b)(1). An LLC that wants a different answer files Form 8832, or Form 2553 for S treatment.
Two federal numbers size the default bill in 2026. The 12.4% Social Security half of self-employment tax, imposed by IRC 1401, stops at the first $184,500 of combined wages and net earnings. The qualified business income deduction of IRC 199A runs up to 20% of profit. It begins to phase down above $201,750 of taxable income on a single return, and $403,500 on a joint one.
Both follow the classification rather than the label. That is why an LLC and a sole proprietorship with equal profit owe equal federal tax.
LLC vs the Other Structures
Every entity choice trades off protection, tax treatment, cost, and formality. The honest comparison:
Vs sole proprietorship. A sole proprietorship is free and automatic. It offers zero liability protection. The moment the business has real revenue, contracts, or risk, the LLC's fee is cheap insurance. Full breakdown: LLC vs sole proprietorship.
Vs general partnership. A handshake partnership makes each partner personally liable for the other partner's business acts. A multi-member LLC provides the same pass-through taxation without that exposure.
Vs S corporation. "S corp" is a tax status, not an entity. An LLC can take the S election and get the same tax result with less governance. A statutory corporation with an S election makes sense mainly when investors or stock option plans are involved. See LLC vs S corporation.
Vs C corporation. Venture capital, stock options for employees, and eventual IPO plans all favor a Delaware C-corp. Everyone else pays double taxation for formality they do not need. See LLC vs C corporation.
Types of LLCs
Single-member LLC. One owner, disregarded for taxes, the most common entity in America. The shield holds only with clean separation of finances. Details in the single-member guide.
Multi-member LLC. Two or more owners, with partnership taxation. The operating agreement matters enormously here. It governs money splits, authority, and exits.
Member-managed vs manager-managed. A governance choice made at filing: either every member can bind the company, or only designated managers can. Passive-investor deals choose manager-managed.
PLLC (professional LLC). Licensed professions (medicine, law, accounting, architecture) must use the professional variant in many states, and the shield never covers your own malpractice. See professional entities explained.
Series LLC. One parent LLC with internal "series," each holding assets walled off from the others. Available in about 20 states, popular for real estate portfolios, and treated inconsistently across state lines, so use with counsel.
Anonymous LLC. New Mexico, Wyoming, and Delaware do not put member names on the public record. Privacy from the public is not privacy from the IRS, banks, or courts. See anonymous LLCs.
Holding company LLC. An LLC that owns assets or other entities rather than operating a business, used to isolate valuable assets from operating risk.
What an LLC Costs
One-time state filing fees run from $35 (Montana) to $520 (Massachusetts). The median state charges $100. Most fall between $50 and $200.
The recurring costs matter more over a company's life. Most states charge annual or biennial report fees. California adds an $800 annual franchise tax and Delaware a $400 annual tax. A registered agent runs $100 to $300 per year if you use a commercial service. The complete picture for every state is in our formation cornerstone and the state cost comparison tool, including the fee table and the four expensive-state footnotes.
How to Form an LLC (the Short Version)
The full process is eight steps and about a week. Choose your state, which is the home state for most founders. Clear the name against the state database. Appoint a registered agent. File the Articles of Organization with the state fee. Adopt an operating agreement. Get the free EIN from the IRS. Get licenses. Open a dedicated bank account. Each step is covered in How to Start an LLC: The Complete Step-by-Step Guide, with fees for all 50 states and the six most expensive mistakes.
When an LLC Is the Wrong Choice
Honesty requires the other side of the ledger. An LLC is usually the wrong tool when:
You are raising venture capital. Institutional investors want Delaware C-corp stock, preferred shares, and option pools. LLC membership interests complicate all three. Founders planning a priced round should incorporate, or expect to convert.
You are testing an idea with zero exposure. A weekend project with no revenue and no risk does not need $200 of state fees and an annual report obligation. Form when the business becomes real.
You want to retain earnings at scale. Pass-through taxation means you pay tax on profits whether or not you distribute them. Businesses reinvesting large profits sometimes prefer C-corp treatment at the 21% corporate rate.
Your profession restricts it. Some states bar licensed professionals from standard LLCs entirely. The PLLC or professional corporation is the required route.
What a Failed Shield Costs: the Penalty Arithmetic
The exceptions are easier to remember once they carry prices. Each row is a place where the entity stops standing between you and a bill.
| Where the shield stops | What lands on you personally |
|---|---|
| A personal guarantee | The whole guaranteed balance. A five-year lease at $3,200 a month is $192,000 of exposure the entity never touched. |
| Withheld payroll tax | The trust fund recovery penalty equals the unpaid withheld income tax plus the employee share of FICA, assessed against the responsible person and collected from personal assets. |
| A late partnership return | $260 per member per month, up to 12 months. Three members, six months late, is $4,680 before any tax is due. |
| Administrative dissolution | The entity leaves the register and the shield leaves with it, retroactively arguable for the whole lapsed period. |
The recurring state charge is the quiet one. It runs whether the business trades or not. From the File.Business fee table: a California LLC owes $820 a year. A Delaware LLC owes a $300 annual tax and files no annual report at all.
A Massachusetts LLC owes $520. A Nevada LLC owes $350 once the annual list and the state business license are added. Stop paying and the ladder starts, as set out in the annual report guide and reinstating a dissolved LLC.
Five Mistakes That Come From Misreading the Definition
These are not filing errors. They are errors about what the thing is, and each produces the same expensive surprise later.
Mistake 01: Reading "limited liability" as "no liability"
The mistake: Treating the entity as a shield against being sued personally rather than against the debts of a separate company.
Why it happens: The phrase names the limit on your investment, not a limit on your conduct.
What it costs: You answer personally for your own negligence and your own promises regardless of the entity.
Prevention: Insure the conduct, form for the debts. Neither substitutes for the other.
Mistake 02: Treating the LLC as a tax structure
The mistake: Forming in the belief that the federal tax bill changes the day the state approves it.
Why it happens: LLC and S corp get discussed in the same breath, although only one is a tax status.
What it costs: Identical tax, plus a fee and a permanent recurring obligation.
Prevention: Separate the dials: the entity decides liability, the classification decides tax. What an S corp actually is covers the second.
Mistake 03: Expecting the shield to reach backwards
The mistake: Forming after a dispute has started and assuming the entity absorbs the old exposure.
Why it happens: The business feels continuous to its owner, so the legal discontinuity is invisible.
What it costs: Everything done before the formation date was done by a sole proprietor. That liability stays personal permanently.
Prevention: Form before the activity that creates the risk. The triggers are listed in why founders form LLCs.
Mistake 04: Hearing "disregarded entity" as "not a real entity"
The mistake: Using the IRS classification of a one-owner LLC as license to run the company from a personal account.
Why it happens: The word is doing tax work and sounds like a verdict on the entity.
What it costs: It is disregarded for income tax only. The commingling it seems to permit is the most cited fact in veil cases.
Prevention: Stay fully real for banking, contracts and records. Detail in the one-owner guide.
Mistake 05: Assuming the operating agreement lives at the state
The mistake: Believing the Articles of Organization hold the ownership split, the profit shares and the exit terms.
Why it happens: The Articles are the only document most founders see, and the state asks for nothing else.
What it costs: Internal rules fall back to the statute, which rarely matches what the members agreed. The gap surfaces during a dispute or a sale.
Prevention: Adopt the agreement separately. Operating agreement essentials covers what belongs in it.
Three Owners, Three LLCs: How the Structure Behaves in Practice
Example 1: Juniper Slate Consulting LLC, sued by a client
Juniper Slate Consulting LLC is a one-member Denver practice billing about $210,000 a year. It runs as a properly maintained single-member LLC. It has a separate bank account, an operating agreement, and contracts signed as the LLC. A client dispute becomes a $90,000 lawsuit. Settlement negotiations start and end with the LLC's assets: its account balance and receivables.
Outcome: Her house, savings, and retirement accounts never enter the conversation. The $50 formation fee did exactly what it promised.
Example 2: Brackenhurst Tile LLC, commingled into a piercing claim
Brackenhurst Tile LLC has two members and about $480,000 of annual revenue. It runs payroll from a personal account. It pays the owner's car lease from business funds. It never adopts an operating agreement. A $118,000 vendor judgment then exceeds the $26,000 in business assets. The plaintiff argues alter ego, and the financial records make the case.
Outcome: The court disregards the entity. The same filing fee bought nothing, because the owners never treated the LLC as real.
Example 3: Selvedge Row LLC, same entity, different classification
Selvedge Row LLC sells denim online. Its profit stabilizes at $140,000 across two consecutive years. The owner keeps the LLC and files Form 2553. The owner then sets a defensible $75,000 salary and takes the rest as distributions exempt from self-employment tax.
Outcome: Same entity, same shield, better math: the flexibility that makes the LLC the default chassis for a growing business.
A liability wall with a tax pass-through
The LLC gives a real business corporate-grade asset protection at small-business cost. Taxes flow straight to your return. It rewards owners who maintain the separation. It punishes those who treat it as a magic label. If your business has revenue, contracts, or risk, the LLC is almost always the right first entity.
Frequently asked questions
What does LLC stand for?
LLC stands for limited liability company. It is a state-registered business entity. It combines the liability protection of a corporation with the tax simplicity of a sole proprietorship or partnership. Owners are called members. You create the entity by filing Articles of Organization with a state.
Is an LLC a corporation?
No. Corporations and LLCs are separate entity types with different statutes, documents, and governance. A corporation has shareholders, directors, and bylaws. An LLC has members and an operating agreement. An LLC can elect to be taxed like a corporation without becoming one. See LLC vs C-corporation.
How is an LLC taxed?
By default the IRS ignores the entity. A single-member LLC reports on the owner's Schedule C. A multi-member LLC files an informational Form 1065 with K-1s to members. Profits are taxed once, on personal returns. Add 15.3% self-employment tax on active income. LLCs may elect S-corp or C-corp treatment instead. See our LLC tax guide.
How much does an LLC cost?
State filing fees range from $35 (Montana) to $520 (Massachusetts). Most states charge $50 to $200 one time. Recurring costs include annual report fees and a registered agent if you use one. Some states also charge franchise taxes, and California charges $800 per year. Compare all 50 states in our cost comparison.
Does an LLC protect my personal assets?
Yes, when maintained properly. Creditors of the business generally cannot reach members' personal property. The shield does not cover personal guarantees you sign, your own professional malpractice or negligence, unpaid payroll taxes, or fraud. Courts can also pierce the veil if you commingle funds or ignore formalities.
Can one person own an LLC?
Yes. Every state allows single-member LLCs. They are the most common type in the country. A single-member LLC is taxed as a disregarded entity by default. It still provides the liability shield, provided you keep business finances separate. See our single-member LLC guide.
Do I need an LLC if I have no revenue yet?
Not necessarily. A business with no revenue, no employees, and no liability exposure can operate as a sole proprietorship while testing an idea. Form the LLC before signing contracts, taking payments at scale, hiring, or doing anything that creates real liability. Our comparison guide covers the crossover point.
Form your LLC
We prepare it, file it with the agency, and confirm it came back accepted. Or keep reading and file it yourself; this guide covers both.
This guide is written from the official sources below. Fees, forms, and deadlines change. Confirm the current requirement with the agency before you file.
Disclosure. File.Business is a private filing service, not a government agency and not a law firm. We prepare and submit filings at your direction, and nothing on this page is legal or tax advice. Filing fees, deadlines, and statutory references are current as of the last-updated date shown above and can change. Confirm current requirements with the relevant state agency before you file.
