A limited liability company, or LLC, is a business entity created under state law that keeps your personal assets separate from your business obligations while letting you pick how the business is taxed. If the company gets sued or can’t pay its debts, creditors can generally reach only the LLC’s assets, not your house or personal bank account. Setup usually costs a few hundred dollars in state filing fees, and the entity can be taxed as a sole proprietorship, partnership, S-corporation, or C-corporation depending on how many owners it has and what elections they make. That combination of legal protection and tax flexibility is why the LLC has become the default choice for most small businesses in the United States.
What the Liability Shield Actually Does
When you form an LLC, the law treats it as a separate legal person. The business signs its own contracts, holds its own bank account, and owes its own debts. If it defaults on a loan, loses a lawsuit, or runs up unpaid invoices, creditors can pursue the LLC’s assets but generally cannot touch personal property you own outside the business.
That separation is the whole point. A sole proprietor or general partner has no legal barrier between business obligations and personal savings; an LLC member does. The protection applies whether you’re the only owner or one of many, and it doesn’t matter whether the members are individuals, other LLCs, corporations, or trusts.
The shield has real limits, though. It does not protect you from your own conduct. If you personally commit fraud, injure someone through your own negligence, or engage in criminal conduct, the LLC won’t insulate you. And if you personally guarantee a business loan, which banks often require from small LLC owners, you’re personally liable for that specific debt regardless of the LLC’s existence.
How Owners Lose the Shield
Courts can collapse the barrier between you and your LLC, a process called piercing the veil, if you treat the business as an extension of yourself rather than a separate entity. When that happens, you become personally liable for the LLC’s debts, which defeats the point of forming one.
Courts typically look at several factors:
- Commingling funds. Using a personal account for business expenses, or paying personal bills from the business account, is the most common trigger and the easiest to avoid.
- Undercapitalization. Starting the LLC with so little money that it could never realistically pay its debts suggests the entity was never a genuine business.
- Ignoring formalities. Failing to keep separate records, skipping required filings, or making major decisions without documenting them.
- Fraud or misrepresentation. Using the LLC specifically to dodge existing obligations or mislead creditors.
The practical takeaway: open a dedicated business bank account from day one and never let personal and business money cross streams. Sign contracts in the LLC’s name. Keep basic records of significant decisions. These habits cost almost nothing and make veil-piercing claims far harder to win.
How LLCs Are Taxed
The IRS doesn’t have a tax category called “LLC.” Every LLC gets slotted into an existing classification, either automatically based on how many members it has, or by election if the owners want a different treatment. This flexibility is one of the LLC’s biggest advantages over a corporation, which is locked into corporate taxation unless it qualifies for and elects S-corp status.
The Default Classifications
A single-member LLC is automatically treated as a “disregarded entity,” meaning the IRS ignores it for income tax purposes and the owner reports all business income and expenses on their personal return, just like a sole proprietorship.1Internal Revenue Service. Single Member Limited Liability Companies You still get the liability protection of an LLC, but your tax filing looks the same as if you were operating without one.
A multi-member LLC defaults to partnership taxation. The LLC files an informational return (Form 1065) but doesn’t pay income tax itself. Each member receives a Schedule K-1 showing their share of the LLC’s income, deductions, and credits, and reports those amounts on their individual return.2Internal Revenue Service. Partner’s Instructions for Schedule K-1 (Form 1065) The profit split follows whatever the operating agreement specifies, which doesn’t have to match ownership percentages.
Under both defaults, business profits pass through to the owners and are taxed only once on their personal returns. That avoids the double taxation that hits traditional C-corporations.
The Self-Employment Tax Problem
The tradeoff for pass-through simplicity is self-employment tax. Under the default classifications, LLC members owe 15.3% on their share of the LLC’s net earnings: 12.4% for Social Security (on earnings up to $184,500 in 2026) and 2.9% for Medicare with no cap.3Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes)4Social Security Administration. Contribution and Benefit Base Traditional employees split these taxes with their employer; self-employed LLC owners pay both halves. On $100,000 in net profit, that’s roughly $15,300 in self-employment tax alone, before income tax.
This is the main reason profitable LLCs consider electing S-corporation status.
Electing S-Corp Status
An LLC can elect to be taxed as an S-corporation by filing Form 2553. The form must be filed no later than two months and 15 days after the start of the tax year the election should take effect (March 15 for calendar-year businesses), or anytime during the prior tax year.5Internal Revenue Service. Instructions for Form 2553
The election lets owner-employees split their income into a salary and a distribution. The salary is subject to payroll taxes (the same 15.3%, split between employer and employee portions). Distributions of remaining profit are not subject to self-employment tax. For an LLC earning well above what the owner would need to pay themselves in salary, the savings can be substantial.
The catch: the IRS requires the salary to be “reasonable compensation” for the work the owner actually performs. Courts have consistently ruled that S-corp shareholders who provide more than minor services must receive appropriate wages, and the IRS will reclassify distributions as wages, with back taxes and penalties, if the salary is unreasonably low.6Internal Revenue Service. S Corporation Employees, Shareholders and Corporate Officers There’s no bright-line rule for what counts as reasonable. Industry norms, job duties, and the company’s revenue all factor in.
S-corp status also comes with eligibility requirements: no more than 100 shareholders, only one class of stock, and no nonresident alien shareholders.7Internal Revenue Service. S Corporations Other LLCs and corporations cannot be shareholders. The S-corp must file its own annual tax return (Form 1120-S), adding complexity and accounting costs compared to the default pass-through treatment.
Electing C-Corp Status
An LLC can also elect C-corporation treatment by filing Form 8832. The election can take effect up to 75 days before the filing date or up to 12 months after it.8Internal Revenue Service. Form 8832 Entity Classification Election C-corp status subjects profits to the federal corporate rate of 21%, and any dividends distributed to owners get taxed again on their personal returns.
Despite that double-taxation drawback, the C-corp election makes sense in specific situations. Venture capital firms and institutional investors often prefer or require C-corp structure. LLCs that plan to reinvest most profits rather than distribute them may benefit from the flat 21% rate if the owners’ personal income tax rates are higher. And C-corps face no restrictions on the number or type of shareholders.
The Qualified Business Income Deduction
LLC owners taxed under the default pass-through classifications, or as an S-corp, may qualify for the qualified business income (QBI) deduction under Section 199A. Eligible taxpayers can deduct up to 20% of their qualified business income from the LLC, effectively reducing the income tax rate on that income.9Office of the Law Revision Counsel. 26 USC 199A – Qualified Business Income The deduction was originally set to expire after 2025 but has been extended, with a minimum deduction of $400 for qualifying active business owners beginning in 2026. The deduction phases out for higher-income taxpayers, and certain service-based businesses face additional restrictions once income exceeds inflation-adjusted thresholds. QBI reduces income tax only, not self-employment tax.
Who Runs the Company
Every LLC has to decide who’s in charge. In a member-managed LLC, all owners share in daily operations and each can sign contracts on behalf of the company. In a manager-managed LLC, one or more designated people handle operations while other owners stay passive. The manager doesn’t have to be a member; you can hire an outside professional to run things.
Member management is the natural fit when all owners are actively involved. Manager management works better when some owners are investors who don’t want operational responsibility, or when the LLC has grown large enough to need professional executives.
The document that spells all of this out is the operating agreement. It’s a private contract among the members that covers ownership percentages, how profits and losses get divided, who has authority to do what, how new members can join, and what happens if someone wants to leave or the business needs to dissolve. Many states don’t legally require one, but operating without an agreement means your LLC defaults to whatever generic rules your state’s LLC statute provides, and those rules almost certainly won’t match what you and your co-owners actually intended.
A good operating agreement also sets voting thresholds for major decisions, spending limits for managers, and procedures for resolving disputes. The time to negotiate these terms is before a disagreement arises, not during one.
How You Form One
LLCs are created under state law, and the process varies by jurisdiction, but the core steps are consistent.
Choose a name. Your LLC name must be distinguishable from other entities already registered in your state and must include “Limited Liability Company,” “LLC,” or “L.L.C.” Search your state’s business entity database, usually through the Secretary of State’s office, to confirm availability before filing anything.
Designate a registered agent. Every state requires your LLC to have a registered agent: a person or company with a physical street address in the state who will accept legal documents and official notices on the LLC’s behalf. You can serve as your own agent, but many owners use a commercial service for privacy and reliability.
File articles of organization. This is the document that formally creates your LLC. Some states call it a certificate of formation. You file it with the state’s business filing office, pay a filing fee, and include basic information like the LLC’s name, address, registered agent, and whether it will be member-managed or manager-managed. Filing fees range from under $50 to over $500 depending on the state.
Get an EIN. An Employer Identification Number is the LLC’s federal tax ID. You need one if your LLC has more than one member, hires employees, or elects corporate tax status.10Internal Revenue Service. Employer Identification Number A single-member LLC with no employees can technically use the owner’s Social Security number for federal tax purposes, but most banks require an EIN to open a business account, and getting one is free through the IRS website.
Draft an operating agreement. Even if your state doesn’t require one, write it before starting operations. This is especially important for multi-member LLCs, where disputes over money and control can destroy a business.
Handle local requirements. Depending on your location and industry, you may need business licenses, professional permits, or local tax registrations before operating.
Keeping the LLC in Good Standing
Forming the LLC is only the first step. Maintaining it requires ongoing compliance, and letting things lapse can cost you the liability protection you formed the LLC to get in the first place.
Most states require an annual or biennial report updating basic information like the LLC’s address, its members or managers, and its registered agent. Fees range from under $10 in some states to several hundred dollars in others. A handful of states also impose franchise taxes or annual minimum taxes on LLCs regardless of whether the business earned any revenue.
Miss the filing deadline and most states will send a notice and give you a grace period. Ignore that too, and the state will administratively dissolve your LLC. A dissolved LLC loses its ability to do business and may lose its liability protection. Reinstatement is usually possible by filing back reports and paying overdue fees and a reinstatement penalty, but the gap between dissolution and reinstatement is a period of real legal vulnerability.
The most important compliance task, though, is keeping the LLC separate from your personal life. Use the LLC’s bank account for all business transactions. Sign every contract with your title (for example, “Jane Smith, Manager of XYZ LLC”), not just your name. Keep records of major decisions, especially ones involving significant spending or changes in ownership. Even brief written notes documenting a business decision can demonstrate that the LLC operated as a genuine entity.
Doing Business in More Than One State
An LLC formed in one state that does business in another must register as a “foreign LLC” in that second state. Foreign qualification typically involves filing paperwork similar to the original articles of organization, appointing a registered agent in the new state, and paying an additional filing fee. You’ll also owe annual report fees in every state where you’re registered.
State statutes don’t always define exactly what constitutes “doing business” in their jurisdiction, but the triggers usually include having a physical office, warehouse, or storefront in the state, employing people there, or regularly conducting sales within the state. Activities like holding a bank account in another state or making occasional sales into the state typically don’t require registration.
Operating in a state without registering can bring fines, inability to file lawsuits in that state’s courts to enforce contracts, and back fees for every year you should have been registered. If your operations regularly cross state lines, budget for the additional registration and compliance costs up front.
When an LLC Isn’t the Right Fit
The LLC isn’t the right structure for every situation, and the enthusiasm surrounding it sometimes obscures real downsides.
Self-employment tax on all net earnings. Under default tax treatment, every dollar of LLC profit is subject to the 15.3% self-employment tax. For a single-member LLC earning $150,000, that’s nearly $23,000 before income tax even enters the picture. The S-corp election can reduce this burden, but it adds accounting complexity and requires paying yourself a reasonable salary.3Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes)
Ongoing state costs. Between formation fees, annual reports, and potential franchise taxes, maintaining an LLC costs money every year whether or not the business is profitable. For a low-revenue side project, those fees might exceed the practical value of the liability protection.
Limited life and transferability. Many state statutes provide that an LLC dissolves when a member leaves, dies, or goes bankrupt unless the operating agreement says otherwise. Transferring ownership interests can be more complicated than selling shares of stock; the operating agreement may require consent from other members, and finding a buyer for a partial LLC interest is harder than selling publicly traded shares.
Cannot go public. If your long-term plan involves an IPO, the LLC won’t get you there. Only corporations can issue publicly traded stock. Converting an LLC to a corporation later is possible but triggers tax consequences and legal costs that could have been avoided by choosing the right structure from the start.
Varying state rules. Because LLCs are creatures of state law, the rules governing them differ from one state to the next. An LLC operating across multiple states faces layers of regulatory compliance that a corporation, governed by more uniform bodies of law, might handle more simply.