Short answer: for most new U.S. small businesses, an LLC is the simplest place to start. An S-Corp isn't a separate business type at all — it's a tax election you can add on top of an LLC or corporation once your profit is high enough that the tax savings outweigh the extra payroll and paperwork. Here's how to think about it.
They're not the same kind of thing
This trips up almost everyone. An LLC (Limited Liability Company) is a legal entity you form with your state. An S-Corporation is a federal tax status you elect with the IRS using Form 2553. You don't pick "LLC or S-Corp" like two doors — you form an entity, then decide how it's taxed. A very common setup is an LLC that has elected to be taxed as an S-Corp.
How each is taxed by default
A single-member LLC is, by default, a "disregarded entity" — its profit flows to your personal return, and generally all of that net profit is subject to self-employment tax (Social Security and Medicare) on top of income tax. A multi-member LLC is taxed as a partnership by default, with similar self-employment exposure for active owners.
With an S-Corp election, you become an owner-employee. You pay yourself a reasonable salary through payroll (which is subject to payroll taxes), and any remaining profit can be taken as distributions that are generally not subject to self-employment tax. That split is where the potential savings come from.
The trade-off: savings vs. overhead
An S-Corp election adds real obligations:
- You must run payroll for yourself and file payroll-tax returns (Form 941, Form 940, W-2s).
- You file a separate business tax return (Form 1120-S), usually with a CPA.
- You need cleaner bookkeeping and a defensible "reasonable salary."
Those costs are roughly fixed, while the tax savings scale with profit. So an S-Corp tends to make sense once you're consistently profitable enough that the self-employment tax you'd save clearly exceeds the added payroll and filing expense. There's no magic number — it depends on your profit and salary, which is exactly the kind of thing to model with a CPA.
A simple way to decide
- Just getting started, modest profit? An LLC keeps things simple and cheap.
- Consistently profitable owner-operator? Ask a CPA whether an S-Corp election would net you savings.
- Planning to raise venture capital or issue stock? A C-Corporation is usually the better fit.
This guide is general information, not legal or tax advice. Entity choice and tax elections have consequences that depend on your specific situation and change over time. Confirm your decision with a licensed CPA or attorney. She Assist USA prepares and coordinates business filings and payroll but does not provide legal or tax advice.
Frequently asked questions
Is an S-Corp a type of business entity?
Not exactly. "S-Corp" is a federal tax election, not an entity type. You first form an entity — usually an LLC or a corporation — and then elect S-Corp tax treatment with the IRS by filing Form 2553. So you can have an "LLC taxed as an S-Corp."
How can an S-Corp save on taxes?
With a default LLC, all net profit is generally subject to self-employment tax. With an S-Corp election, an owner-employee pays themselves a reasonable salary (subject to payroll taxes) and can take remaining profit as distributions that are not subject to self-employment tax. The potential savings depend on your profit level and the salary you pay yourself.
What is a reasonable salary for an S-Corp owner?
The IRS requires S-Corp owner-employees who provide services to take a reasonable salary before distributions. "Reasonable" depends on your role, industry and what similar work pays. Setting it too low is a common audit risk, so this is a good question for your CPA.
Does an S-Corp mean more paperwork?
Yes. An S-Corp generally requires running payroll for owner-employees, filing a separate business return (Form 1120-S), issuing W-2s, and more bookkeeping discipline. Those added costs can offset the tax savings for lower-profit businesses.
When does an S-Corp election usually make sense?
Often once a business is consistently profitable enough that the self-employment tax savings clearly exceed the added payroll and filing costs. There's no universal threshold — it depends on your numbers, so confirm with a CPA before electing.