The most common source of confusion here is that people compare "LLC versus S-corp" as though they were the same kind of thing. They are not. An LLC is a legal entity created under state law. An S-corp is a federal tax election that certain entities — including LLCs — can make. You can have both at once.

The four structures at a glance

Structure Liability Default taxation Admin burden
Sole proprietorship None — you and the business are the same legal person Profit flows to your personal return; self-employment tax on net earnings Lowest; no formation filing
General partnership None, and each partner can bind the others Pass-through; partnership files an information return, partners are taxed Low, but needs a partnership agreement
LLC Separates personal assets from business liabilities, if respected Pass-through by default; can elect corporate or S-corp treatment Moderate; formation plus annual state obligations
Corporation Strongest separation; established body of law C-corp taxed at entity level; S-corp election makes it pass-through Highest; bylaws, board, minutes, formalities

Question one: how much liability exposure do you have?

This is usually the deciding question, and the honest version of it is: if something goes badly wrong, what could a claimant reach?

A sole proprietorship offers no separation at all. A business debt or judgment is your personal debt, and personal assets are exposed. That is acceptable for genuinely low-risk activity with few assets to protect, and much less so once you have employees, premises, physical work, or significant contracts.

Liability protection is not automatic

An LLC protects you only if you treat it as separate: its own bank account, no commingling of personal and business money, contracts signed in the entity's name, and state filings kept current. Where those break down, a claimant can argue the entity is a formality and reach the owner personally. See opening a business bank account.

It is also worth being clear about what an entity does not cover: your own negligence, obligations you personally guarantee — most small business leases and loans — and unpaid payroll taxes, which the IRS can pursue responsible individuals for regardless of structure.

Question two: how will profits be taxed?

Pass-through, the default for most

Sole proprietorships, partnerships and LLCs are pass-through by default. The business itself pays no federal income tax; profit is reported on the owners' returns and taxed at their individual rates. A single-member LLC is disregarded for federal tax purposes and reported on Schedule C much like a sole proprietorship.

Self-employment tax, and what the S-corp election changes

Pass-through owners pay self-employment tax on business earnings, covering Social Security and Medicare. This is the cost people are usually trying to reduce when they ask about S-corps.

With an S-corp election, an owner-operator becomes an employee of their own business, takes a salary subject to payroll taxes, and can take remaining profit as a distribution not subject to self-employment tax. The salary has to be reasonable compensation for the work performed — this is an IRS requirement, and setting an artificially low salary to shift income into distributions is a well-known audit trigger.

The election has running costs

An S-corp means payroll, a separate business return, and usually more accounting fees. Below a certain profit level those costs exceed the tax saved. This is a genuine calculation, not a rule of thumb — worth running with an accountant on your actual numbers before electing.

C-corp and double taxation

A C-corporation pays tax at the entity level, and dividends are taxed again at the shareholder level. That is a real cost for a business distributing its profits, which is why most small businesses avoid it. It becomes attractive when you are retaining earnings to reinvest, or raising institutional investment — most venture investors expect a Delaware C-corp because of how stock, preferences and options work there.

Question three: what administration will you actually keep up?

A structure you do not maintain is worse than a simpler one you do. Corporations carry the heaviest formalities: bylaws, a board, officers, recorded resolutions and minutes. LLCs are lighter but not free — most states require an annual or biennial report, and many charge an annual franchise tax or fee regardless of profit.

Missing those filings can put an entity out of good standing, and in the worst case lead to administrative dissolution — which removes the liability protection you formed it for. See the annual compliance checklist.

How this usually resolves

  1. Testing an idea, minimal risk, no employees

    A sole proprietorship is often proportionate to start. It converts easily later.

  2. Real customers, contracts, premises or employees

    An LLC is the common answer — meaningful liability separation without corporate formalities.

  3. Two or more owners

    A multi-member LLC with a thorough operating agreement, which matters far more than the entity choice itself.

  4. Consistent profit well above your salary needs

    Model the S-corp election with an accountant. It is a calculation with a break-even, not a status symbol.

  5. Raising outside investment

    A C-corp, usually in Delaware, because that is what institutional investors are set up for.

Questions owners ask

Should I form in Delaware or Nevada for the tax benefits?

For most small businesses, no. If you operate in your home state you generally have to register as a foreign entity there anyway, which means two sets of fees, two registered agents and two annual filings — and you are still taxed where you do business. Forming out of state is aimed at companies raising institutional capital, not at avoiding home state tax.

Can I change structure later?

Yes, and it is common. Sole proprietor to LLC is straightforward. LLC to S-corp treatment is an election. Converting to a corporation is more involved but routine. Choosing something reasonable now is better than delaying while you optimise.

Does an LLC reduce my taxes?

By default, no. A single-member LLC is taxed essentially the same as a sole proprietorship. The tax change comes from the S-corp election, which is separate from forming the LLC. People often conflate the two and are disappointed.

Do I need a lawyer to choose?

Not always for a simple single-owner business. It is worth it when there are multiple owners, outside investment, significant assets, or an industry with unusual liability — the cost of getting those wrong dwarfs the fee.

Where to check

Next chapter

If an LLC is the answer, the next chapter walks the formation steps in the order that avoids rework.

How to form an LLC