What Is an LLC? A Step-by-Step Guide to Formation, Costs & Taxes

Two freelance graphic designers each get sued by a client over a botched project. One operates as a sole proprietor; the other formed an LLC eighteen months earlier for about the cost of a nice dinner out. If the lawsuit succeeds, the sole proprietor’s personal savings, car, and home equity are all fair game to satisfy the judgment. The LLC owner’s personal assets, in almost every normal circumstance, are not — only what the business itself owns is on the line. Same mistake, same lawsuit, completely different personal exposure.

That protection is the entire reason the limited liability company (LLC) has become the most popular business structure for new small businesses in the United States. This guide covers exactly what an LLC is, why that liability protection works the way it does, a real step-by-step walkthrough of forming one, what it actually costs, and how LLCs are taxed — including the one tax election decision that trips up more new LLC owners than almost anything else.

(A quick note before diving in: this article explains how LLCs generally work, but state rules and tax details vary and change. Nothing here is formal legal or tax advice — talk to a licensed attorney or CPA before making a final decision for your specific situation.)

What Is an LLC?

A limited liability company (LLC) is a business structure formed under state law that combines two features that used to require choosing one or the other: the liability protection of a corporation, and the simpler, pass-through taxation of a sole proprietorship or partnership. It’s a U.S. legal entity — most other countries use different structures with different names for similar liability protection (the UK’s limited company, India’s private limited company, and similar entities elsewhere aren’t legally identical to a U.S. LLC, even though the underlying goal is similar).

An LLC exists as its own legal entity, separate from its owners (called “members”). It can own property, sign contracts, open bank accounts, and be sued — all in its own name, distinct from the people who own it. That separation is exactly what creates the liability shield described above. The U.S. Small Business Administration’s own overview of choosing a business structure is a good official reference to read alongside this guide.

Why Business Owners Choose an LLC

An LLC’s popularity comes down to a small number of concrete advantages:

• Limited personal liability. As long as the business is run properly and the owner hasn’t personally guaranteed a debt or committed fraud, an LLC’s debts and legal judgments generally can’t reach the owner’s personal assets — only what the business itself owns.
• Pass-through taxation by default. Unlike a traditional corporation, an LLC generally doesn’t pay federal income tax at the entity level. Profit “passes through” to the owners’ personal tax returns instead, avoiding the double taxation a C corporation can face (covered in more detail in our guide to what a C corporation is).
• Flexible ownership and management. An LLC can be owned by one person or many, managed by its owners directly or by appointed managers, and doesn’t face the same rigid formalities — a formal board, required meeting minutes, structured bylaws — that a corporation typically does.
• Added credibility. For many freelancers and solo entrepreneurs, moving from operating under their own name to operating as “[Business Name], LLC” signals a level of seriousness and permanence to clients, vendors, and lenders that a sole proprietorship doesn’t always convey.
• Flexible tax treatment. An LLC can also elect to be taxed differently than its default treatment — including electing S corporation status, covered in detail in our guide to what an S corporation is, which is one of the most consequential tax decisions many growing LLCs eventually face.

LLC vs. Sole Proprietorship: The Core Tradeoff

For a solo founder, the comparison almost always comes down to this:

A sole proprietorship is what you’re operating as by default the moment you start doing business under your own name, with no paperwork at all — our full guide on what a sole proprietorship is covers that default structure in depth. The tradeoff is straightforward: a sole proprietorship costs nothing and requires no paperwork, but offers zero separation between business and personal liability. An LLC costs a modest filing fee and a bit of ongoing paperwork, in exchange for real personal asset protection.

LLC vs. C Corporation: The Other Common Comparison

The other frequent comparison is against a traditional corporation. Our guide to what a C corporation is covers that structure in full, but the short version:

Most small businesses that don’t have specific plans to raise institutional venture capital are better served by an LLC’s simplicity. Businesses planning to raise significant outside investment often eventually convert to a C corporation anyway, since most venture investors prefer the stock structure and tax treatment a corporation offers.

Single-Member vs. Multi-Member LLCs

An LLC can have one owner or many, and the distinction matters for both liability and taxation:

• A single-member LLC has one owner and is taxed by default as a “disregarded entity” — meaning the IRS treats it as if it doesn’t exist separately from its owner for tax purposes, and profit is reported directly on the owner’s personal return (typically via Schedule C). Legally, though, it’s still a fully separate entity for liability purposes — the disregarded treatment applies only to taxation, not to the liability shield itself.
• A multi-member LLC has two or more owners and is taxed by default as a partnership, filing its own informational return (Form 1065) and issuing each member a Schedule K-1 reporting their share of the profit or loss to include on their personal return.

Both structures can additionally elect corporate or S corporation tax treatment, which changes the tax mechanics without changing the underlying liability protection.

How to Form an LLC: A Step-by-Step Walkthrough

Here’s the actual formation process most states follow, in order:

1. Choose and check your business name. Your name typically needs to include “LLC” or “Limited Liability Company,” and it can’t already be in use by another registered business in your state. Our guide to choosing a company name covers this step in more depth, including checking trademark conflicts before you commit.
2. Appoint a registered agent. Every LLC needs a registered agent — a person or service authorized to receive legal documents and official state correspondence on the business’s behalf, with a physical address in the state of formation. Many owners act as their own registered agent; others pay a service to handle it, often for privacy reasons.
3. File Articles of Organization. This is the core formation document, filed with your state’s Secretary of State (or equivalent agency), officially creating the LLC as a legal entity. It typically requires the business name, registered agent information, and management structure.
4. Create an operating agreement. Not every state legally requires one, but skipping it is one of the most common early LLC mistakes. This internal document spells out ownership percentages, profit-sharing, decision-making authority, and what happens if a member wants to leave — without it, state default rules apply, and those defaults rarely match what the owners actually intended.
5. Get an EIN (Employer Identification Number). This free number from the IRS functions like a Social Security number for the business — it’s required to open a business bank account, hire employees, and file most business tax returns.
6. Open a dedicated business bank account. Mixing personal and business funds is one of the fastest ways to undermine the liability protection an LLC is supposed to provide (more on this below) — a separate account is essential, not optional.
7. Obtain any required licenses and permits. Depending on your industry and location, this might include a general business license, a seller’s permit, or industry-specific certifications — requirements vary significantly by city, county, and state.
8. Understand your ongoing compliance obligations. Most states require an annual or biennial report and fee to keep the LLC in good standing — missing these can result in the state administratively dissolving the LLC without the owner even realizing it happened.

Every one of these steps is worth planning for in your business startup budget before you begin, since filing fees, registered agent costs, and license fees all add up before the business generates its first dollar of revenue. H&R Block’s own walkthrough of how to form an LLC is worth a look for a second, tax-focused take on this same process.

What Does It Actually Cost to Form an LLC?

State filing fees for Articles of Organization vary widely — commonly somewhere in the range of $35 on the low end to $500 on the high end, depending on the state, with most states falling somewhere in the middle of that range. Some states also charge separate, sometimes substantial, annual report or franchise tax fees on top of the initial filing fee, so the first-year cost and the ongoing annual cost can look quite different. Because these fees change and vary so much by location, always check your specific state’s current fee directly with its Secretary of State website — treat any number you read online, including the range above, as a starting estimate rather than the final word. If you’re comparing formation costs and requirements across states — for example, if you’re deciding how to start a business in Michigan, how to start a business in Virginia, or simply looking at the best city to start a business in the USA more broadly, state-specific fees and requirements are one of the concrete factors worth weighing alongside taxes and market size.

How LLCs Are Taxed

This is the part of LLC ownership that catches the most new owners off guard: an LLC is a legal structure, not a tax structure. The IRS’s own page on LLC tax classification confirms there’s no dedicated “LLC tax return” — instead, an LLC is taxed according to whichever category it falls into or elects:

• Single-member LLC, default: Taxed as a disregarded entity — profit and loss reported on the owner’s personal return via Schedule C, and subject to self-employment tax on the full amount of net profit.
• Multi-member LLC, default: Taxed as a partnership — the LLC files an informational return, and each member reports their share of profit or loss on their personal return, also generally subject to self-employment tax.
• LLC electing C corporation taxation: The LLC is taxed as its own entity at corporate tax rates, and owners are taxed again on any dividends distributed — the same double-taxation structure a traditional C corporation faces.
• LLC electing S corporation taxation: Profit still passes through to the owners’ personal returns, avoiding double taxation, but owners who work in the business must be paid a “reasonable salary” subject to payroll tax, while remaining profit can potentially be distributed without the added 15.3% self-employment tax. This is frequently the single biggest tax-saving move available to a profitable LLC owner, and it’s covered in complete detail — including a full worked numeric example — in our guide to what an S corporation is.

Under the default pass-through treatment, LLC owners typically pay themselves through an owner’s draw rather than a traditional payroll paycheck — a distinction that matters a great deal for bookkeeping and estimated tax payments, and one that changes entirely if the LLC elects S corp taxation instead. The self-employment tax implications of the default treatment are also worth understanding fully before assuming it’s the right long-term choice; our guide to self-employment covers how that tax applies more broadly.

Should You Elect S Corp Taxation for Your LLC?

Not automatically, and not for every LLC — but for a profitable, established LLC where the owner is actively working in the business, the S corp election can mean real self-employment tax savings once profit reaches a meaningful level. It’s also not free: S corp status adds payroll processing requirements, a “reasonable salary” test the IRS actively scrutinizes, and its own election deadlines. Because this decision depends heavily on your specific profit level and how the mechanics actually work, we cover it as its own complete topic — with a full worked example showing exactly how the tax savings are calculated — in what is an S corporation.

LLC Liability Protection: What It Does and Doesn’t Cover

The liability shield is the whole point of an LLC, but it’s not unconditional. Courts can “pierce the corporate veil” — disregarding the liability protection entirely — in situations like:

• Commingling personal and business funds. Paying personal expenses directly from the business account (or vice versa) is the single most common way owners accidentally undermine their own protection.
• Personal guarantees. Many small business loans and leases require the owner to personally guarantee the debt, which makes that specific debt collectible from personal assets regardless of the LLC structure.
• Fraud or personal wrongdoing. An LLC doesn’t shield an owner from liability for their own fraudulent or illegal actions, even when those actions happened in the course of running the business.
• Failing to maintain the entity properly. Not filing required annual reports, not keeping business and personal finances separate, or treating the LLC’s bank account like a personal one all weaken the argument that the LLC is a genuinely separate entity — which is exactly the argument a court relies on to pierce the veil in the first place.

The protection is real, but it depends on actually treating the LLC as a distinct entity — on paper and in practice — not just filing the paperwork once and assuming the shield takes care of itself from there.

Ongoing LLC Compliance

Forming an LLC isn’t a one-time task. Most states require an annual or biennial report confirming the business’s current address, registered agent, and ownership information, often paired with a renewal fee. Missing these deadlines is one of the most common — and most avoidable — ways small business owners accidentally lose their LLC’s good standing, sometimes without realizing it until a lender, client, or the state itself flags the lapse. It’s worth treating this the same way you’d treat any recurring bill: calendared, budgeted for, and not left to memory. Using accounting or compliance-tracking tools to flag these deadlines alongside your regular bookkeeping is a simple habit that prevents an entirely avoidable problem.

Common LLC Mistakes

• Skipping the operating agreement, even for a single-member LLC — it strengthens the argument that the LLC is a genuine, separate entity, and it’s essential the moment a second member joins.
• Mixing personal and business finances, which is the fastest way to undermine liability protection that took real effort to set up correctly.
• Not budgeting for ongoing compliance costs, then getting blindsided by an annual report fee or, worse, an administrative dissolution notice.
• Assuming “LLC” automatically means lower taxes. Its default tax treatment is simply pass-through — it doesn’t automatically reduce the tax bill unless paired with a deliberate election like S corp status, and even that only helps once profit crosses a meaningful threshold.
• Treating a creditor’s claim or a debtor’s obligation as automatically separate from personal finances, without actually maintaining the entity separation that makes that true.

Frequently Asked Questions

What does LLC actually stand for? LLC stands for Limited Liability Company — a U.S. business structure that combines a corporation’s personal liability protection with a sole proprietorship or partnership’s simpler, pass-through taxation.

Is an LLC the same as a corporation? No. Both offer limited personal liability, but an LLC has simpler formation requirements, fewer ongoing formalities, and pass-through taxation by default, while a corporation faces more formal governance requirements and, in the case of a C corporation, potential double taxation.

How much does it cost to form an LLC? State filing fees typically range from about $35 to $500 depending on the state, plus potential ongoing annual report or franchise tax fees. Always check your specific state’s current fee directly, since these vary widely and change over time.

Do I need a lawyer to form an LLC? Not necessarily — many owners file the paperwork themselves or use a formation service. That said, a lawyer or accountant is worth consulting for anything beyond a simple single-member LLC, particularly around the operating agreement and tax election decisions.

Can a single person own an LLC? Yes. A single-member LLC is fully valid in every state, taxed by default as a disregarded entity, and still provides the same liability protection as a multi-member LLC.

Does forming an LLC protect me from all lawsuits? No. It generally protects personal assets from business debts and most business-related lawsuits, but it doesn’t protect against personally guaranteed debts, personal fraud or wrongdoing, or situations where a court finds the LLC wasn’t properly maintained as a separate entity.

What’s the difference between an LLC’s default taxation and electing S corp status? By default, all LLC profit is subject to self-employment tax when it passes through to the owner. Electing S corp status splits owner compensation into a “reasonable salary” (subject to payroll tax) and remaining distributions (which can avoid the added self-employment tax), which can meaningfully lower the total tax bill once profit is high enough to justify the added payroll complexity.

Can an LLC raise money from investors? Yes, though it’s less common than for a corporation. Many investors — particularly venture capital firms — prefer investing in C corporations because of the more familiar stock structure, which is why LLCs seeking significant startup capital or seed capital sometimes convert to a corporation before a major fundraising round.

Final Thoughts

An LLC exists to solve one specific problem: letting a business owner separate their personal financial life from their business’s legal and financial risk, without taking on the full formality and double taxation of a traditional corporation. The formation process is genuinely manageable — a name check, a state filing, an EIN, and a handful of ongoing compliance habits — but the protection it provides only holds up if the entity is actually treated as separate in practice, not just on paper.

If you’re currently operating as a sole proprietor and weighing whether the switch is worth it, the graphic designers at the start of this guide are the whole argument in miniature: the cost of forming an LLC is small and one-time; the cost of not having one, if something goes wrong, can be everything you personally own.