01ExplainerFoundational
How to choose a legal structure for your business
Sole proprietorship, LLC, or corporation, explained in plain English for US founders, with the questions to answer before you file and when to bring in a professional.
By Khalel Dumaz, Founder of Vora IQ
Published
The short answer
In the US, most new businesses choose between a sole proprietorship, an LLC, and a corporation. The choice affects your personal liability for business debts, how you're taxed, how much paperwork you take on, and how easily you can raise money. The right answer depends on your risks, co-owners, and funding plans, so confirm it with an attorney or accountant before you file.
- Level
- Foundational
- Reading time
- 6 minutes
- Updated
- Sources
- 3 cited
- Useful for
- All business types
Understand
The direct answer, in plain language, and why it matters.
What a legal structure is
Your legal structure is the form your business takes in the eyes of the government. The SBA's guidance lays out the stakes: your structure affects your taxes, your ability to raise money, the paperwork you file, and your personal liability.[1] The IRS adds that your form of business determines which income tax return you file.[2]
The main options in plain English
Sole proprietorship
A sole proprietorship is a business owned by one person, with no separate legal entity. If you start doing business without registering as anything else, the SBA notes that you're automatically considered a sole proprietor.[1]
It's the simplest way to start, but you can be held personally liable for the business's debts and obligations. The SBA also notes that it can be hard to raise money, because you can't sell stock and banks are hesitant to lend to sole proprietorships.[1]
If you have co-owners, the closest equivalent is a partnership, which the SBA describes as the simplest structure for two or more people to own a business together.[1]
Limited liability company (LLC)
An LLC is a business structure created under state law, and its owners are called members.[3] According to the SBA, an LLC protects you from personal liability in most instances. Profits and losses can pass through to your personal income rather than being subject to corporate taxes, and members are considered self-employed and must pay self-employment tax.[1]
By default, the IRS treats a single-member LLC as part of its owner and a multi-member LLC as a partnership, and an LLC can elect to be taxed as a corporation instead.[3] Whether an election makes sense is a question for an accountant.
Corporation
A corporation, sometimes called a C corp, is a legal entity separate from its owners. The SBA says corporations offer the strongest protection from personal liability, but they require more extensive record-keeping, operational processes, and reporting. Corporations pay income tax on their profits, and in some cases profits are taxed twice: once when the company makes a profit, and again when owners receive dividends. On the other hand, corporations can raise money by selling stock.[1]
An S corporation is a special type of corporation designed to avoid that double taxation. Profits, and some losses, pass directly to owners' personal income. Not every business qualifies, and the IRS sets the eligibility requirements.[1]
The SBA's guide also covers less common structures, including cooperatives, benefit corporations, and nonprofit corporations.[1]
A side-by-side comparison
| Question | Sole proprietorship | LLC | Corporation |
|---|---|---|---|
| Legally separate from you? | No | Yes | Yes |
| Personal liability protection | None | In most instances | Strongest |
| Paperwork | Least | More | Most |
| How profits are taxed | On your personal return | Passed through by default, with the option to elect corporate treatment | At the corporate level, unless it qualifies for and elects S corp status |
| Raising investment | Hardest | Possible | Easiest, through selling stock |
Apply
The framework, a worked example, and the steps to take.
How to decide
- 01
Ask how much risk the business creates
Think about what could go wrong: a customer injured at a job site, a product that causes harm, a client who says your advice cost them money, or debts the business can't repay. The more serious the potential claims, the more liability protection matters. Ask about insurance too.
- 02
Count your owners
On your own, every option is open. With co-owners, you'll choose between a partnership, a multi-member LLC, and a corporation, and you'll want a written agreement about who owns what and what happens if someone leaves.
- 03
Decide whether you'll raise outside investment
If you plan to sell shares to investors, structure matters early, since corporations can raise money through the sale of stock.[1] If you're likely to raise venture capital, talk to a startup attorney before you form anything, because investors may have specific expectations.
- 04
Be honest about how much admin you'll keep up with
More protection usually comes with more formality. Choose a structure whose requirements you'll actually keep up with, and ask a professional what maintaining it involves where you operate.
- 05
Check the details for your state, then file
Registration, fees, and ongoing requirements depend on where you operate. The SBA's launch guide covers registering, getting tax ID numbers, and applying for licenses and permits. It also cautions that converting to a different structure later may be restricted by location and can have tax consequences.[1]
Worked example
Hypothetical scenarioA mobile dog groomer weighs her options
Sasha is starting a mobile dog-grooming business from a converted van. She's the only owner, doesn't plan to raise investment, and expects modest profits in her first year.
Her main risks are physical: a dog injured during grooming, or an accident with the van. She wants liability protection, but a corporation's extra formality buys her nothing, since she isn't selling shares.
She leans toward a single-member LLC and gets insurance quotes. Before filing, she books an hour with an accountant to ask how the LLC would be taxed, and checks her state's filing office for registration and annual requirements.
Advance
Your next action, the right tool, and where to go next.
Prepare for the professional conversation
An AI assistant can help you organize your situation and questions before a meeting. It can't tell you what's right for your state or your taxes.
I'm starting a [type of business] in [state]. It will have [number] owners. I expect about [revenue estimate] in revenue in my first year, and my main risks are [describe risks, such as physical injury, product defects, or professional advice]. I [do or don't] plan to raise outside investment.
Help me prepare for a meeting with an accountant or attorney about choosing between a sole proprietorship, an LLC, and a corporation. List the questions I should ask, grouped by liability, taxes, paperwork, and future plans. Don't recommend a structure, and don't state tax rates or fees. Flag anything I should confirm for my state.
Your next step
Read the SBA's guide to business structures, write down your answers on risk, owners, investment, and admin, and book a short meeting with an accountant or attorney. If you haven't settled how the business will make money, read how to choose a business model first. Once you've formed it, learn the difference between cash flow and profit.
Key takeaways
- Your legal structure affects personal liability, taxes, paperwork, and your ability to raise money.
- A sole proprietorship is the default and simplest, but offers no separation between you and the business.
- An LLC protects you from personal liability in most instances. A corporation offers the strongest protection and the most formality.
- Rules vary by state. Confirm your choice with an attorney or accountant before you file.
Questions founders also ask
Frequently asked questions
What's the difference between an LLC and a sole proprietorship?
A sole proprietorship isn't legally separate from you, so you can be held personally liable for business debts. An LLC is a separate structure created under state law that, according to the SBA, protects you from personal liability in most instances, though it involves more paperwork. By default, a sole proprietorship's profit is taxed on your personal return, and an LLC's profit passes through to your personal income. Confirm which fits you with an attorney or accountant.
Do you need an LLC to start a business?
No. In the US, if you start doing business without registering as anything else, the SBA says you're automatically considered a sole proprietor. That's the simplest way to start, but it offers no separation between you and the business, so you can be held personally liable for its debts. Whether forming an LLC is worth it depends on your risks, co-owners, and plans, so ask an attorney or accountant.
When should you choose a corporation instead of an LLC?
A corporation is worth considering if you plan to sell shares to investors, since corporations can raise money by selling stock. According to the SBA, a corporation offers the strongest liability protection but requires the most record-keeping and reporting, and its profits can be taxed twice in some cases. If you expect to raise venture capital, talk to a startup attorney before you form anything, because investors may have specific expectations.
How is an LLC taxed?
By default, the IRS treats a single-member LLC as part of its owner and a multi-member LLC as a partnership, so profits pass through to the owners' personal income. The SBA notes that LLC members are considered self-employed and must pay self-employment tax. An LLC can also elect to be taxed as a corporation. Whether an election makes sense depends on your situation, so ask an accountant or tax professional.
Does an LLC replace business insurance?
No. Liability protection and insurance do different jobs, so forming an LLC doesn't replace business insurance. According to the SBA, an LLC protects you from personal liability in most instances. Whatever structure you choose, think through what could go wrong, such as a customer injured at a job site, a product that causes harm, or a client who says your advice cost them money, and ask about insurance too.
Sources
Every externally sourced claim links back here. We explain ideas in our own words and link to the original work. See the full source index.
- [1]Launch your business: business structure, registration, licenses, and permits
U.S. Small Business Administration
Official guidance · Accessed November 3, 2026
- [2]
- [3]Limited liability company (LLC)
Internal Revenue Service
Official guidance · Accessed November 3, 2026
Khalel Dumaz is the founder of Vora IQ, which publishes The Founder Almanac, and the author of The Vibe Code Bible, a free guide to building software with AI.
Keep building
Related reading
Start a BusinessExplainer8 min
How to choose a business model that fits your idea
A business model is how your business creates value for customers and gets paid for it. Choose one by matching how your customers already prefer to buy, how often they have the problem, what each sale costs you to deliver, and how much cash you need before money comes in. Then test it with real customers before you commit.
Money & FinanceExplainer7 min
Why profitable businesses still run out of cash
Profit is what's left after you subtract expenses from the revenue you've earned in a period. Cash flow is the money that actually moves in and out of your bank account. The two drift apart when customers pay late, when you pay for inventory or equipment upfront, or when you grow quickly, so a profitable business can still be unable to pay its bills.
Start a BusinessField guide13 min
How to validate a business idea before spending money
Validating a business idea means collecting evidence that a specific group of people has a problem and will pay you to solve it, before you invest heavily. Write down your riskiest assumptions, talk to people who have the problem, then ask for a real commitment, such as a deposit, pre-order, or paid pilot. A commitment is far stronger evidence than a compliment.