"Should I form an LLC?" is one of the first questions people ask when they start working for themselves, often before they have a single client. The structure of a business does matter. It affects who is responsible for debts and claims, how the business is taxed, what forms you file, and what it costs to maintain. But for many one-person businesses, the right structure at the start is the simplest one, with a change later when the business gives you a reason. This section explains the options so you can make that decision deliberately.
The main options
In the United States, the common structures for small businesses are:
- Sole proprietorship. The default when one person does business without forming an entity. No formation filing, and business income is reported on the owner's personal tax return. The owner is personally responsible for the business's debts and obligations.
- Partnership. The default when two or more people do business together for profit without forming another entity. Partners generally share responsibility, and the partnership files its own information return.
- Limited liability company (LLC). An entity formed under state law that can separate business liabilities from personal assets when properly maintained. It is flexible in how it is taxed.
- Corporation. A separate legal entity with its own tax treatment, formalities and costs, including the option for eligible small corporations to elect S corporation tax treatment.
Liability: what separation actually means
The main reason people form an LLC or corporation is to separate business liabilities from personal assets. That separation is real but not absolute. It depends on keeping the business genuinely separate, with its own bank account and records, and it does not protect you from your own professional negligence in many situations. Insurance often plays as large a role in managing risk as structure does. The guides explain where the protection applies and where it does not.
Tax treatment
Structure and tax treatment are related but not identical. A single-member LLC, for example, is typically treated like a sole proprietorship for federal income tax unless it elects otherwise. Corporations and S corporations follow different rules. The tax effect of a structure depends on profit levels, how you pay yourself and your state's rules, which is why general claims that one structure always saves tax should be treated with caution.
Cost and paperwork
Each structure carries its own costs and obligations: formation fees, annual reports or fees in many states, separate tax returns for some entities, and formalities such as minutes or payroll for others. Those costs are worth paying when the structure brings a real benefit. They are a drag when it does not.
When to reconsider
Common reasons to revisit your structure include taking on significant contracts or risks, bringing in a partner, hiring employees, a large rise in profit, or a client requiring you to contract through an entity. The guides set out the questions to ask at each point.
Getting advice
Structure decisions have legal and tax consequences that depend on your state and circumstances. The guides in this section explain the concepts and the official sources, but for a decision with significant money at stake, a conversation with an accountant or attorney who knows your state is worth having.
Where to start
Read the guide on sole proprietorships first, because it is where most people begin and it explains the baseline every other option is compared against. Then read about LLCs and the other structures when you have a specific reason to consider them.
Guides in this section
- How to form an LLC: the steps for a single-member business
How to form a single-member LLC: state and name, registered agent, articles, operating agreement, EIN, bank account, licenses and annual reports.
- LLC vs sole proprietorship: how to decide for a one-person business
LLC or sole proprietorship for a one-person business: liability, federal tax treatment, paperwork, state costs and the questions to ask first.
- Sole proprietorship: what it is, what it costs you, and when to move on
A sole proprietorship is the default when you work alone without forming an entity. What it means for liability, taxes, names and banking, and when to move on.