How to Choose a Business Structure

Almost everyone starts with the wrong question. They ask, “Should I be an LLC or an S-corp?” — as if those are two items on the same menu. They aren’t. An LLC is a legal structure. An S-corp is a tax election. You can be both at the same time, and plenty of my clients are.

Get that straight first and most of the confusion clears up. There are really two separate questions hiding inside “what should my business be,” and they have different answers:

• Who’s on the hook if something goes wrong? (the liability question)
• How does the IRS tax what I make? (the tax question)

Answer them in that order.

The liability question

If you operate as a sole proprietor — just you, no paperwork filed — there’s no legal wall between you and the business. A lawsuit or a business debt can reach your personal bank account, your car, your house. Same goes for a general partnership: you’re personally exposed, and so is your partner’s share of trouble.

Form an LLC (limited liability company) or a corporation and you build that wall. Done right, a creditor or plaintiff is limited to the assets inside the business, not your personal ones. That separation is the entire reason most small businesses form an entity at all. It’s also fragile — commingling personal and business money, skipping the basic formalities, or signing personal guarantees can let someone “pierce the veil” and reach you anyway. Forming the entity is step one; respecting it is step two.

For most owners, the liability answer is simple: form an LLC. It’s cheap to maintain, light on formalities, and it does the job. The corporation route matters mainly when you’re raising outside investment or issuing stock — a smaller slice of the small-business world than the internet suggests.

The tax question (where the LLC/S-corp confusion lives)

Here’s the part the generic articles get wrong. An LLC has no tax status of its own. By default, the IRS ignores it and taxes the income the simplest way it can:

• One owner? Taxed as a sole proprietorship — profit flows onto your personal return (Schedule C).
• Two or more owners? Taxed as a partnership.

That’s the default. On top of it, an LLC (or a corporation) can elect to be taxed as an S-corp or a C-corp. The election changes the tax math; it doesn’t change the legal entity. Your LLC is still an LLC.

So the real decision tree looks like this: pick the legal entity for liability, then choose how it gets taxed as the numbers justify it.

Why the S-corp election eventually comes up

The reason owners reach for the S-corp election is self-employment tax. As a sole proprietor or partner, your net business profit gets hit with 15.3% self-employment tax — 12.4% for Social Security on the first $184,500 of earnings in 2026, plus 2.9% for Medicare with no cap — on top of regular income tax. (You do get to deduct half of it, which softens the blow a little.)

An S-corp election splits your take into two buckets: a reasonable salary that runs through payroll and gets hit with those payroll taxes, and the remaining profit as a distribution that doesn’t. That second bucket is where the savings come from.

It is not free money. The S-corp brings real costs and rules:

• You have to run actual payroll, which means a payroll service, more filings, and more bookkeeping.
• The IRS requires that salary to be reasonable for the work you do — paying yourself $0 and taking everything as distributions is the fastest way to get the election unwound in an audit.
• State fees and franchise taxes can apply.

So the election only makes sense once the tax savings clearly outrun those added costs. As a rough rule of thumb, that’s when net profit is sitting comfortably above what you’d reasonably pay yourself in salary — but a rule of thumb is not your answer. The honest answer is to run your own numbers, because the breakeven moves with your salary, your state, and your profit.

What usually doesn’t decide it

A few things people fixate on that rarely move the needle:

• The QBI deduction. The 20% qualified business income deduction (Section 199A) is available to sole proprietors, partnerships, and S-corps alike — and OBBBA made it permanent, so it’s no longer the expiring perk older guides warn about. Because all three can claim it and it’s not going away, it almost never tips the choice between them.
• “Sounding official.” An LLC in your business name doesn’t make you more legitimate to the IRS or more creditworthy to a bank. Liability protection and tax treatment are the substance; the name is not.

How to actually decide

For most people starting out, the path is straightforward:

1. Just testing an idea, tiny revenue, low risk? A sole proprietorship is fine to start. You can form an entity the day it stops being fine.
2. Real revenue, customers, any liability exposure? Form an LLC. This is the default home for the overwhelming majority of small businesses.
3. Profit climbing past what you’d pay yourself in salary? Look at the S-corp election on that LLC — and decide with the calculator, not a blog post’s threshold.
4. Raising outside capital or planning to issue stock? That’s the conversation where a C-corp earns its place. Bring a CPA and an attorney to it.

The mistake I see most often isn’t picking the “wrong” entity — it’s picking one and then never revisiting it as the business grows. The right structure at $30k of profit is frequently the wrong one at $120k. Treat the decision as something you review, not something you set once and forget.

If you want the head-to-head on the three most common starting points, I broke them down here: S-Corp vs LLC vs Sole Prop.

This article is general information, not tax or legal advice. The right answer depends on details specific to you and your state. Talk to a qualified preparer before you form an entity or make a tax election.