S Corp vs LLC: What's the Difference?
An LLC is a legal business structure, while an S corp is a tax election — and you can actually be both at once. Most people compare them like they're two competing business types, but that framing is wrong: you form an LLC (or a corporation) with your state, then separately choose how the IRS taxes it. Understanding that distinction is the fastest way to figure out what you actually need.
The key difference most people miss
An LLC is a legal entity you create by filing paperwork with your state. It defines who owns the business and shields your personal assets from business debts. An S corp isn't a legal entity at all — it's a tax status you elect with the IRS by filing Form 2553, and either an LLC or a corporation can make that election. So the real comparison isn't "LLC vs. S corp" — it's "default LLC taxation vs. LLC-taxed-as-S-corp."
| Factor | Default LLC | LLC with S-corp election |
|---|---|---|
| What it is | A legal business structure | A tax election on top of an LLC or corporation |
| How it's taxed | Pass-through to owner's personal return (sole proprietor or partnership rules) | Pass-through, but income splits into salary + distributions |
| Self-employment tax | Owner pays SE tax on all net profit | Owner pays payroll tax only on salary, not on distributions |
| Paperwork/formalities | Minimal — annual report, no payroll required | Payroll runs, reasonable-salary documentation, separate tax return |
| Ownership limits | None — any number or type of owner | Max 100 shareholders, generally U.S. individuals only, one stock class |
When an LLC by itself is enough
If you're just starting out, testing an idea, or your net profit is modest, a plain LLC is usually the right call. There's no payroll to run, no reasonable-salary debate, and no extra tax return. You get the liability protection and the simplicity of reporting everything on your personal taxes. Most small businesses never need to layer an S-corp election on top, and adding one too early just adds cost and complexity for savings that don't exist yet.
When electing S-corp status can save on taxes
The S-corp election earns its keep once your LLC's net profit is high enough that the self-employment tax savings outweigh the cost of running payroll and filing an extra return. In practice, that threshold tends to land somewhere around $40,000 to $80,000 in net profit, though your exact break-even point depends on state payroll costs and accounting fees. Below that range, the payroll and compliance overhead usually eats up whatever you'd save. To make the switch, you file IRS Form 2553 to elect S-corp tax treatment for your existing LLC — no need to form a new entity.
Disadvantages of an S corp
The tax savings come with real strings attached. You'll need to run payroll, which means payroll tax filings, withholding, and often a payroll service subscription. The IRS also requires you to pay yourself a "reasonable salary" before taking any distributions — pay yourself too little and you risk an audit and back taxes. On top of that, you're on the hook for more filings (a separate S-corp tax return, Form 1120-S), and you have to live within stricter ownership restrictions: no more than 100 shareholders, generally only U.S. individuals as owners, and just one class of stock.
Practical takeaway: keep the default LLC taxation until your profit is consistently strong enough to justify payroll and extra filings — then talk to a CPA about electing S-corp status with Form 2553. If you're closing down instead of growing, see how to dissolve an LLC the right way, or browse more guides on running and winding down a small business.
Form or convert your business the right way
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Not legal or tax advice. Every business's numbers and situation are different — consult a licensed CPA or attorney for your situation before electing S-corp status or changing how your business is taxed.
S corp vs LLC: FAQ
What are the disadvantages of an S corp?
You have to run payroll and pay yourself a "reasonable salary," which means more paperwork and payroll-tax filings even in a slow month. S corps also face stricter ownership rules — no more than 100 shareholders, all must be U.S. individuals (with narrow exceptions), and only one class of stock — plus separate tax filings that usually mean higher accounting fees.
Should I switch my LLC to an S corp?
It depends on your net profit and whether you can justify a reasonable salary. Once your LLC is consistently clearing roughly $40,000–$80,000 in profit after expenses, the self-employment tax savings from an S-corp election often start to outweigh the added payroll and filing costs. Below that, the extra complexity usually isn't worth it.
What is the purpose of an S corporation?
An S corp exists purely as a tax election — it lets a qualifying business pass its income, losses, and deductions through to the owners' personal tax returns while avoiding corporate-level tax. Its main draw is letting owners split income between salary and distributions, potentially lowering the self-employment or payroll tax bill.
Is my single-member LLC an S corp or C corp?
By default, neither. The IRS treats a single-member LLC as a "disregarded entity," meaning it's taxed like a sole proprietorship unless you file paperwork to change that. You can elect S-corp tax treatment for it by filing Form 2553, but until you do, it's just an LLC taxed on your personal return.
These answers are general information, not legal, tax, or financial advice. Rules and fees change and vary by state — confirm current requirements with the relevant government agency and, for your situation, a licensed professional.