Quick Comparison
| Structure | Liability Protection | Taxation | Best For |
|---|---|---|---|
| Sole Proprietorship | None | Pass-through (Schedule C) | Side hustles, low-risk solo businesses |
| LLC | Yes | Pass-through (can elect S-Corp) | Most small businesses, freelancers, consultants |
| S-Corporation | Yes | Pass-through (save on SE tax) | Businesses earning $50K+ in profit |
| C-Corporation | Yes | Double taxation (21% corp + dividends) | Businesses seeking venture capital |
The Simple Decision Tree
- Just starting out / testing an idea - Sole Proprietorship
- Want liability protection - LLC
- LLC earning $50K+ profit and want tax savings - LLC taxed as S-Corp
- Seeking venture capital - C-Corp
Start With the Two Questions That Drive the Answer
Entity choice usually comes down to two things: what liability exposure you are trying to separate from your personal assets, and how you want profits taxed. Everything else — the paperwork, the name, the impression it makes — is secondary and reversible.
The Distinction People Miss
An LLC is a legal entity created under state law. An S corporation is a federal tax election, not an entity type. An LLC can elect to be taxed as an S corporation, which is why "LLC vs. S-Corp" is not really a like-for-like comparison. You are usually choosing an entity first and a tax treatment second, and the second choice can change later as the business changes.
What Each One Is Generally Used For
- Sole proprietorship / general partnership: no separate entity, no liability separation. Simple, and the simplicity is the entire argument for it.
- LLC: liability separation with light administration and flexible tax treatment. The common default for small operating businesses.
- LLC or corporation taxed as an S corp: considered when profits are consistently well above what you would pay yourself as reasonable compensation. It adds payroll and filing obligations, so it is a tradeoff, not an upgrade.
- C corporation: the structure outside investors generally expect, with its own tax filing at the entity level. Usually chosen because of who you intend to raise money from.
The Costs Nobody Mentions Up Front
Beyond formation fees, ask about the recurring obligations before you choose: state annual reports or franchise filings, registered agent fees, separate business bank accounts, payroll administration if you elect S corp treatment, and a more involved tax return. None are dramatic individually. They add up, and they are the part people regret not knowing.
Protecting the Liability Separation You Paid For
Forming an entity does not by itself protect you if you then operate as though it does not exist. The practices that matter are unglamorous and consistent:
- A separate business bank account, with no personal spending run through it
- Contracts signed in the entity's name, by you in your role, not personally
- Keeping up with state filings so the entity stays in good standing
- Documenting significant decisions, even in a single-member business
- Not personally guaranteeing obligations unless you have decided to
Signals That It May Be Time to Revisit the Choice
- Profit has grown well past what you would pay yourself for the same work elsewhere
- You are adding owners, or someone wants equity
- You are raising outside investment, or being asked about your cap table
- You have hired employees rather than contractors
- You have entered a licensed or regulated activity
- You are operating in additional states and may need to register there
How to Have This Conversation Efficiently
Bring three things to an attorney or CPA and the meeting gets much shorter: your current and expected revenue and profit, who owns or will own the business, and your realistic risk exposure — what would actually go wrong and who would be harmed. That is enough for a professional to give you a specific answer instead of a general one.
DISCLAIMER: This is general educational information, not legal or tax advice. Entity and tax rules vary by state and change over time. Consult a licensed attorney and a CPA about your specific situation.