LLC vs. sole proprietorship: how to choose

If you have started doing paid work and filed nothing, you already have a business structure. You are a sole proprietor by default, the moment the first invoice goes out. The real question is whether to stay one, and it comes down to a trade. An LLC costs money and paperwork to maintain, and in exchange it puts a legal wall between your business's debts and your personal savings.

This guide compares the two structures on the dimensions that actually decide it: liability, taxes, cost, and ongoing paperwork. It also covers how to convert when your answer changes, which it often does as a business grows. Choosing a structure is step 4 of our full guide to starting a business.

The short answer

A sole proprietorship is the simplest possible arrangement: you and the business are legally the same person, which means zero formation cost and zero separation from business liabilities. An LLC is a state-registered entity that exists apart from you, which costs a filing fee and some annual upkeep and in return generally shields your personal assets from business debts and lawsuits.

By default the IRS taxes both the same way, so for many owners the decision reduces to whether the liability exposure is worth more than the filing fee.

The sections below take each row in turn.

What a sole proprietorship is

A sole proprietorship is an unincorporated business owned by one person, and it is the default structure for anyone who starts doing business without registering an entity. Freelancers, consultants, rideshare drivers, and market vendors are usually sole proprietors whether or not they have ever used the term.

There is no legal distinction between you and the business. Its income is your income, reported on Schedule C with your personal tax return. Its debts are your debts. Contracts are signed in your name, and if a client sues the business, they are suing you.

The only filing a sole proprietor commonly makes is a DBA, short for "doing business as," which registers a trade name with the state or county so you can operate as something other than your legal name. A DBA changes your branding and nothing else. It creates no entity and no liability protection.

What the structure offers is friction-free operation. The state has nothing on file for you to maintain, and tax season means the return you already file. For work with little liability exposure, that simplicity is a legitimate advantage.

What is an LLC?

A limited liability company is a business entity created under state law. Once the state approves the filing, the LLC exists as its own legal person: it can own property, sign contracts, borrow money, and be sued, all in its own name. Its owners are called members, and an LLC can have one member or many.

That separate existence is the point, and one of the main reasons entrepreneurs form an LLC is to separate personal assets from business liabilities. When a creditor pursues an LLC's debts, the claim generally stops at what the company owns, leaving the members' homes, savings, and personal accounts outside its reach.

Forming one involves a few standard pieces:

• Articles of Organization, the document filed with the state, usually the Secretary of State, that brings the LLC into existence.
• A registered agent, a person or service with a physical address in the state who receives legal documents on the company's behalf.
• An operating agreement, the internal document that sets out ownership shares, management, and what happens when a member leaves. Most states allow you to skip it. Skipping it is how single-member LLCs lose credibility with banks and how multi-member LLCs end up in disputes.

LLCs are also flexible about taxes. By default the IRS ignores the entity and taxes members directly, and an LLC can instead elect to be taxed as an S corporation or a C corporation when the math favors it. The election changes tax treatment only; the company remains an LLC under state law.

The LLC sits between the sole proprietorship and the corporation on the spectrum of formality, which is why it has become the default choice for small businesses that want protection without a board and bylaws. For the wider map of entity types, including corporations and partnerships, see our guide to business structures.

Liability, side by side

This is the dimension where the two structures genuinely differ, and it deserves an unglossed look.

Sole proprietorship. There is no wall. If the business owes a supplier, defaults on a lease, or loses a lawsuit, every personal asset you own is available to satisfy the claim. Business insurance can absorb many of these risks, and for some low-exposure businesses insurance alone is a reasonable answer. The exposure it leaves behind is unlimited by design.

LLC. The wall exists, and it holds under normal conditions. A member's risk is generally capped at what they have put into the company. Three situations reach past it:

• Personal guarantees. Lenders and landlords routinely require members of a young LLC to guarantee its obligations personally, which waives the protection for that specific debt.
• Your own conduct. The LLC shields you from the business's liabilities. It does nothing about liability for your own wrongful acts. A member who injures someone or commits fraud answers for it personally, LLC or no LLC.
• A pierced veil. Courts can disregard an LLC whose owners treated it as an extension of themselves, and commingled money is the classic evidence. Separating personal and business finances is an important way to help safeguard your liability, which makes a dedicated business account part of the protection itself.

The honest summary is that an LLC's protection is real and conditional on maintaining the entity properly, while a sole proprietorship has no protection to maintain in the first place.

Taxes, side by side

By default, federal income tax treats the two structures almost identically. Both are pass-through arrangements, meaning the business itself pays no federal income tax and profits land on the owners' personal returns.

Sole proprietorship. You file Schedule C with your Form 1040 and pay income tax on the business's net profit. You also pay self-employment tax, which covers Social Security and Medicare at a combined 15.3% on net earnings, made up of 12.4% for Social Security up to the annual wage base plus 2.9% for Medicare. Because no employer withholds anything for you, the IRS generally expects quarterly estimated payments if you will owe $1,000 or more for the year.

Single-member LLC. By default, exactly the same. The IRS calls it a disregarded entity, meaning the LLC's existence is invisible for income tax and everything above applies unchanged, Schedule C and self-employment tax included. Forming an LLC changes your legal position and, by default, leaves your federal income tax bill exactly where it was.

Multi-member LLC. Taxed as a partnership by default. The LLC files an informational return, Form 1065, and issues each member a Schedule K-1 reporting their share of profit, which each member picks up on their personal return.

The S corporation election. Here is the tax difference that can eventually matter. An LLC can elect S corporation treatment by filing Form 2553, generally within two months and 15 days of the start of the tax year the election covers. Under the election, an owner who works in the business takes a reasonable salary through payroll, paying Social Security and Medicare taxes on the salary, and can take remaining profit as distributions that avoid self-employment tax. At sufficient profit levels the savings are real. They come with payroll costs, an additional tax return, and IRS scrutiny of what counts as a reasonable salary, so the election tends to make sense only after profits comfortably clear the owner's salary. The structural point for this comparison is that a sole proprietor has no entity and therefore nothing to elect. The LLC is what makes this option available later.

State taxes are too varied to compress into a paragraph, though one pattern matters for this comparison. Some states impose an annual franchise or LLC tax regardless of profit, and that cost folds into the next section.

Cost and paperwork, side by side

Sole proprietorship. Existence is free. A DBA filing, if you want a trade name, typically costs a modest state or county fee. Licenses and permits apply based on what you do and where, and they apply equally to both structures, so they cancel out of this comparison.

LLC. Three layers of cost:

• Formation. State filing fees run from $40 to $500 depending on the state. Including all fees and services, the upfront cost of forming an LLC typically ranges from $300 to $1,000.
• Annual upkeep. Most states require an annual or biennial report, with fees ranging from $0 to $800. Eight states charge no annual fee or franchise tax at all: Arizona, Idaho, Minnesota, Mississippi, Missouri, New Mexico, Ohio, and South Carolina.
• Optional services. A registered agent service typically bills yearly, and an accountant becomes more valuable once elections and separate filings enter the picture.

Our state-by-state breakdown of what it costs to start an LLC has the specific figures for your state.

The paperwork gap is habits as much as forms, since an LLC needs its report filed on time, its registered agent current, and its finances kept separate from the members' personal money.

None of it is hard. All of it is mandatory if the liability wall is going to hold. Letting an LLC lapse can cost reinstatement fees, and in the worst case the protection itself.

When a sole proprietorship fits

The structure tends to fit when the risks it leaves uncovered are small:

• The work carries low liability exposure. A freelance designer's worst-case scenario looks different from a contractor's. Where a project gone wrong means a refund, the value of a liability wall is limited.
• You are testing an idea. A structure can wait until the business has proven it will exist next quarter. Converting later is routine, and the section below covers it.
• The business is a side income. Modest revenue alongside a job often does not justify an annual fee and a filing calendar, particularly in high-fee states.
• You work alone and plan to keep it that way. The moment a co-owner enters, the default becomes a general partnership, which shares the sole proprietorship's unlimited liability and multiplies it by someone else's decisions. Co-ownership is a strong reason to formalize.

Insurance deserves a mention in all of these cases, since general liability or professional liability coverage addresses many of the same risks the LLC wall does, and plenty of sole proprietors carry coverage as their protection strategy.

When an LLC fits

The calculus shifts as exposure and commitments accumulate:

• You sign contracts, leases, or loans. Each obligation is a claim that would otherwise reach your personal assets.
• You hire employees. Payroll brings obligations and risks that most owners prefer to house inside an entity.
• The work itself carries risk. Physical premises, physical products, food, vehicles, client property, anything where an accident produces a claim larger than a refund.
• The business has co-owners. An LLC with an operating agreement turns the default partnership's handshake terms into written ones.
• You expect profits that make the S corporation election attractive. The LLC is the container that makes the election possible.
• Credibility matters in your market. Some clients and vendors treat an entity, an EIN, and a business bank account as table stakes for larger engagements.

Cost rarely decides this in the long run. The formation fee is one-time and the annual fee is known in advance, so the question is whether the protection and options are worth a few hundred dollars a year in your state.

How to convert from one to the other

Sole proprietorship to LLC. This is the common direction, and the path is well worn.

1. Form the LLC. Check name availability, appoint a registered agent, and file Articles of Organization. Our guide to starting an LLC walks each step.
2. Get a new EIN. A sole proprietor who forms an LLC generally needs a fresh number, even if the old business had one. The application is free and takes about fifteen minutes; how to get an EIN covers it.
3. Move your registrations. Transfer or refile licenses, permits, and any DBA under the LLC's name, since these generally attach to the owner of record.
4. Open a business bank account in the LLC's name. For a registered entity this step is strongly advisable, because commingled funds are the classic evidence used to pierce the liability wall you just paid to build. You will generally need your Articles of Organization, your EIN confirmation letter, and your operating agreement. Our walkthrough of opening a bank account for your LLC lists the documents, and Bluevine Business Checking can be opened online once they are in hand.
5. Update everything that carries the old identity. Contracts, invoices, insurance policies, payment platforms, and vendor W-9s all need the LLC's name and EIN. Old obligations signed personally stay personal until the counterparty agrees to move them.

LLC back to sole proprietorship. Rarer, and mostly a wind-down. You file dissolution paperwork with the state, settle the LLC's debts, distribute what remains, file final tax returns, and cancel registrations and permits held in the company's name. Business then continues under your own name and taxpayer ID. States charge a dissolution fee, and skipping the formal dissolution leaves annual fees accruing on an entity you no longer use.

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