An LLC — limited liability company — has become the default wrapper for millions of American small businesses, side hustles, rental properties and consulting practices. It promises two things: a wall between your personal assets and your business obligations, and a tax profile that avoids the double taxation built into corporations. Both promises are genuine. Neither is automatic. The protection depends on how you operate the company, and the tax treatment depends on elections you file and rules you follow.

What an LLC actually is

An LLC is a creation of state law, not federal law. You file articles of organization with a state agency — usually the secretary of state — pay a filing fee, and the state recognizes a business that exists separately from the people who own it. Those owners are called members, and their stakes are membership interests rather than shares of stock. The entity can open a bank account, sign contracts, own property and continue to exist when an owner dies or leaves.

That separateness is the entire point. If the company is sued or cannot pay its bills, creditors generally look to the company's assets rather than the members' homes and savings. Many states also add charging order protection, limiting what a member's personal creditors can reach.

The liability shield has limits

The shield protects you from the company's obligations. It does not protect you from your own negligence, from contracts you sign personally, or from taxes you are responsible for withholding. Courts can also pierce the veil — set the entity aside — when a business is run as a personal piggy bank.

  • Commingling money. Paying business costs from a personal account, or depositing client checks into your own account, is the most common way owners lose the shield.
  • Personal guarantees. Landlords, equipment lenders and many vendors insist on one. When you sign, you are personally on the hook regardless of the LLC.
  • Fraud or reckless conduct. No entity structure insulates deliberate misrepresentation.
  • Ignoring formalities. No records, no resolutions, no operating agreement — especially for a single-member LLC — makes it easier for a plaintiff to argue the company was never real.
  • Unpaid payroll taxes. The IRS can pursue responsible persons directly.

Forming one, step by step

The mechanics are simple; the judgment calls are not.

  • Choose a state. Most owners form where they actually operate. Delaware and Wyoming are popular, but forming out of state usually forces you to register as a foreign LLC at home anyway, doubling fees and paperwork.
  • Check the name. It must be distinguishable from existing entities and usually must contain "LLC," "L.L.C." or "Limited Liability Company."
  • Appoint a registered agent. A person or company with a physical street address in the state, available during business hours to receive legal documents.
  • File articles of organization. Fees range from roughly $50 to $500 depending on the state.
  • Adopt an operating agreement.
  • Get an EIN. Free from the IRS, and required for a business bank account even if you have no employees.
  • Register for taxes and licenses. Sales tax permits, local business licenses, professional licenses, and foreign registration in any other state where you have a physical presence or employees.

The operating agreement matters more than people think

Most states do not file it, but it governs ownership percentages, capital contributions, voting, how profits are split, and what happens if a member dies, quits or wants out. Multi-member LLCs without one are essentially inviting a lawsuit. A single-member version is still worth having: it is evidence that you treated the company as separate.

How an LLC is taxed

By default, the IRS ignores the LLC and taxes its owners. That default can be changed, and choosing well is worth more than most people realize.

Single member: disregarded entity

One owner means the LLC files nothing federally; profit and loss flow to your personal return, typically on Schedule C. You pay income tax and self-employment tax on the net.

Multiple members: partnership

The LLC files an informational return and issues each member a Schedule K-1. Members pay income tax and self-employment tax on their distributive share, whether or not cash was actually distributed.

The S-corp election

An LLC can elect to be taxed as an S corporation by filing Form 2553. The appeal is payroll: instead of paying self-employment tax on all net profit, an owner takes a "reasonable salary" subject to payroll taxes and the remainder as distributions. The catch is real — you need payroll, a separate business return and often higher accounting costs. Many advisors suggest running the numbers somewhere around $60,000 to $80,000 of consistent net profit before the election pays for itself, and the IRS does police the reasonable salary requirement.

Member-managed or manager-managed

In a member-managed LLC, owners run the business and vote on major decisions. In a manager-managed LLC, owners are investors and a designated manager handles day-to-day operations. The choice belongs in the operating agreement. Related variations include the professional LLC, required in many states for doctors, lawyers and accountants, and the series LLC, which lets one parent entity hold multiple protected cells — but only a handful of states recognize series structures, so do not assume portability.

Ongoing obligations

Formation is the cheap part. Most states require an annual or biennial report plus a franchise tax or fee; a few, like California, add income-based charges on top of a flat annual tax. New York makes LLCs publish a notice in two newspapers shortly after formation. Keep your registered agent current, keep licenses renewed, and keep business and personal money strictly apart.

Federal disclosure rules have also been moving. Beneficial ownership reporting under the Corporate Transparency Act briefly applied to small companies in 2024, then was narrowed in 2025 so that domestic LLCs are exempt; foreign entities registered in the United States still report. Check current FinCEN guidance before filing.

When an LLC is the wrong tool

A solo consultant with no inventory, no employees and little litigation exposure may find the shield worth less than the annual fees. Venture-backed startups usually want a Delaware corporation, because investors need preferred stock. And if you expect to elect S-corp status immediately, some accountants prefer starting as a corporation. Conversion is routine, though: an LLC can become a corporation, and often the reverse.

The practical takeaway: an LLC is a container, not a strategy. It works when you fund it, document it, and keep it at arm's length from your personal life. Skip those steps and you have paid a filing fee for a logo.