One of the first big decisions in starting a business is how to legally structure it. The main forms — sole proprietorship, partnership, corporation, and LLC — differ in who owns them, who's on the hook for debts, how they're taxed, and how easily they can raise money.
Sole Proprietorship
A sole proprietorship has one owner and is the easiest and cheapest business to start. The owner keeps all the profit and makes all the decisions. The big drawback is unlimited liability: legally, the owner and the business are the same, so if the business owes money or is sued, the owner's personal assets — savings, car, even home — are at risk.
Partnership
A partnership has two or more owners who share ownership, profits, and responsibilities. It's still fairly easy to form and brings more skills and capital than going solo. But partners usually share unlimited liability, and disagreements between partners can create problems, so a clear partnership agreement matters.
Corporation
A corporation is a separate legal entity owned by shareholders. Its biggest advantages are limited liability (owners generally aren't personally responsible for the company's debts) and the ability to raise large amounts of money by selling stock. The trade-offs: corporations are more complex and expensive to set up and run, and profits can face “double taxation” — taxed as company profit and again as shareholder income.
Limited Liability Company (LLC)
An LLC blends the best of both worlds: it gives owners the limited liability of a corporation while keeping much of the simplicity and tax flexibility of a proprietorship or partnership. That balance makes the LLC a very popular choice for small businesses today.
How to Choose
There's no single “best” form — it's about trade-offs. A business weighs how much liability protection it needs, how simple and cheap it wants setup to be, how it will be taxed, and whether it needs to raise money from investors. A one-person side hustle and a company planning to sell stock will land in very different places.
Key Takeaways
- Sole proprietorship: one owner, simple, but unlimited personal liability.
- Partnership: shared ownership and profits, usually shared unlimited liability.
- Corporation: separate legal entity, limited liability, can sell stock, but complex and double-taxed.
- LLC: limited liability with simpler taxes — popular for small businesses. Choice depends on liability, taxes, simplicity, and raising money.
Keep Studying
Related: What Is a Business?, Competitive Advantage.
These guides are educational and written for the AP Business with Personal Finance course. They explain concepts in simplified terms for study purposes.