Most business owners pick their entity structure based on what their friend did, what a Google article said, or what sounded official at the time. That single decision quietly costs them thousands of dollars every year. If you are weighing LLC S Corp or C Corp as your business structure, the difference is not cosmetic. It determines how much self-employment tax you pay, whether your profits get taxed once or twice, and how much of your income you actually keep. This is one of the few decisions where getting it right can mean a five-figure swing in your tax bill, and getting it wrong can lock you into years of overpayment.

Here is the part nobody tells you: the “best” entity is not a fixed answer. It changes based on your profit level, your goals, and your willingness to run payroll. Let’s break down exactly how each structure taxes your money, who each one is built for, and the specific dollar thresholds where switching makes sense.

Quick Answer: LLC, S Corp, or C Corp in Plain English

An LLC is a legal structure, not a tax structure, which means by default it gets taxed like a sole proprietorship or partnership and you pay self-employment tax on all profits. An S Corp is a tax election that lets you split income between salary and distributions, cutting your self-employment tax. A C Corp is a separate taxpaying entity that pays a flat 21 percent corporate rate but exposes you to double taxation when profits are distributed as dividends.

For most profitable small businesses earning between $60,000 and $400,000 in net profit, the S Corp election wins. For businesses planning to reinvest heavily, raise venture capital, or retain earnings, the C Corp can make sense. The plain LLC is best for brand-new or low-profit businesses that want simplicity.

How an LLC Is Taxed (And Why It Costs More Than You Think)

An LLC, or Limited Liability Company, is the most popular starting point for new business owners, and for good reason. It gives you liability protection, separating your personal assets from your business debts, with minimal paperwork. But here is the trap: by default, the IRS does not tax an LLC as its own thing. A single-member LLC is taxed as a sole proprietorship, and a multi-member LLC is taxed as a partnership.

That matters because every dollar of net profit from a default LLC is subject to self-employment tax, which is 15.3 percent covering Social Security and Medicare, on top of your regular income tax. There is no salary-versus-distribution split to reduce that burden.

Real Example: The Freelancer Who Overpaid for Years

Consider Marcus, a freelance marketing consultant with a single-member LLC netting $120,000 per year. Under the default LLC tax treatment, his self-employment tax alone comes to roughly $16,955 (the 15.3 percent applies to 92.35 percent of net earnings). Add federal income tax on top, and Marcus is handing over a significant chunk he never had to.

Marcus assumed forming an LLC “handled” his taxes. It did not. The LLC protected his assets but did nothing to optimize how his income was taxed. Many self-employed professionals make this exact mistake, treating a legal entity like a tax strategy.

When the Plain LLC Actually Makes Sense

Do not write off the default LLC entirely. It is the right call when:

• Your net profit is under $40,000 to $50,000, where S Corp payroll costs outweigh savings
• You are in your first year and want to keep bookkeeping simple
• Your income is unpredictable and you want flexibility before committing to payroll
• You want the lowest possible administrative burden while you test the business

Key Takeaway: An LLC gives you legal protection but zero tax advantage by default. Once your profit crosses roughly $50,000, you are likely leaving money on the table by not electing S Corp status.

Why the S Corp Election Is the Secret Weapon for Profitable Owners

Here is where the real tax savings live. An S Corp is not a different legal entity. It is a tax election you make, often on top of your existing LLC, by filing Form 2553 with the IRS. The S Corp lets you split your income into two buckets: a reasonable salary (subject to payroll taxes) and distributions (not subject to self-employment tax).

That split is the entire game. Only your salary gets hit with the 15.3 percent payroll tax. The remaining profit flows to you as distributions, completely free of self-employment tax.

Step-by-Step: How the S Corp Saves You Money

1. Determine a reasonable salary based on what someone in your role would earn, since the IRS requires this per Fact Sheet guidance on S corporation compensation
2. Run payroll on that salary, paying Social Security and Medicare taxes only on that amount
3. Take remaining profit as distributions, which skip the 15.3 percent self-employment tax entirely
4. File Form 1120-S as your business return and report the pass-through income on your personal return via Schedule K-1

Real Example: The $9,000 Swing

Back to Marcus with his $120,000 profit. If he elects S Corp status and pays himself a reasonable salary of $70,000, only that $70,000 is subject to the 15.3 percent payroll tax, costing about $10,710. The remaining $50,000 comes to him as distributions with zero self-employment tax. Compared to his default LLC self-employment tax of nearly $17,000, Marcus saves roughly $6,000 to $9,000 per year, every year, just from the entity election.

For a deeper breakdown of how this works specifically in high-tax states, our team has published a complete guide to S Corp tax strategy in California that walks through the state-level nuances most owners miss.

KDA Case Study: LLC Owner Saves Big With S Corp Restructure

One of our clients, Priya, ran a boutique design agency structured as a single-member LLC. She was netting about $185,000 per year and paying self-employment tax on the entire amount, which came to roughly $24,000 annually before income tax even entered the picture. She came to us frustrated that her “successful” business felt like it was barely leaving her anything after taxes.

We restructured her LLC to elect S Corp status and set a reasonable salary of $95,000 based on market data for agency owners in her role. That salary carried the payroll tax, roughly $14,500, while the remaining $90,000 in profit flowed to her as distributions free of self-employment tax. The net result was a first-year tax savings of approximately $9,400.

Priya paid us $3,100 for the restructure, the S Corp election filing, and the payroll setup. That means her first-year return on investment was about 3x, and the savings repeat every single year she stays an S Corp. We also helped her set up clean bookkeeping and payroll so the reasonable salary documentation would hold up under any IRS scrutiny. Three years later, her cumulative savings have passed $28,000.

Ready to see how we can help you? Explore more success stories on our case studies page to discover proven strategies that have saved our clients thousands in taxes.

How a C Corp Is Taxed and When It Beats the Alternatives

A C Corp is a fully separate taxpaying entity. It pays corporate income tax at a flat 21 percent rate on its profits. The catch, and it is a big one, is double taxation: the corporation pays tax on its profits, and then shareholders pay tax again when those profits are distributed as dividends.

For a small business owner who wants to pull all the profit out each year, that double hit usually makes the C Corp the worst choice. But C Corps shine in specific situations where the 21 percent flat rate and the ability to retain earnings become powerful advantages.

When the C Corp Actually Wins

• You plan to raise venture capital, since most investors require a C Corp structure
• You want to retain and reinvest earnings in the business rather than distribute them, avoiding the second layer of tax
• You qualify for Qualified Small Business Stock treatment, which can exclude up to 100 percent of gains on sale under Section 1202
• You want robust tax-free fringe benefits like health insurance and certain reimbursements that are harder to structure in an S Corp

Real Example: The Reinvesting Founder

Consider David, a software founder whose company nets $300,000 but who reinvests nearly all of it into hiring and product development. As a C Corp, his company pays 21 percent on profits but faces no second layer of tax because he is not distributing dividends. He is also positioning the company for an eventual investment round that requires C Corp status. For David, the structure that double-taxes most owners is actually the smartest play.

Key Takeaway: The C Corp is a growth-and-reinvestment vehicle, not an income-extraction tool. If you pull all your profit out each year, the double taxation usually makes it a costly mistake.

LLC vs S Corp vs C Corp: Side-by-Side Comparison

If you want to see how these numbers play out with your specific profit figures, plug them into this small business tax calculator before committing to any structure.

Should You Elect S Corp Status? A Decision Framework

Yes, elect S Corp if:

• Your net business profit exceeds roughly $60,000 per year
• You can justify and document a reasonable salary for your role
• You are willing to run formal payroll and file an 1120-S return
• You plan to distribute most of your profit to yourself

No, stay an LLC or consider C Corp if:

• Your profit is under $40,000, where payroll costs eat the savings
• You want to raise venture capital (go C Corp)
• You plan to retain and reinvest nearly all earnings (consider C Corp)
• Your income is unpredictable and you are not ready for payroll commitments

These decisions get complicated fast when multiple entities, real estate, or high income are involved. That is exactly where business owners benefit most from a strategist rather than a one-size-fits-all answer.

Why Most Business Owners Choose the Wrong Entity

The single most common mistake we see is business owners who form an LLC, assume they are “optimized,” and never revisit the decision as their profit grows. The LLC that made sense at $30,000 in profit becomes a tax liability at $150,000 because they are paying full self-employment tax on money that could flow as distributions.

The second mistake is going the opposite direction: electing S Corp too early. If your profit is under $40,000, the cost of running payroll, filing a separate return, and maintaining compliance can exceed the self-employment tax savings. Timing matters.

The third mistake is choosing a C Corp because it “sounds more legitimate,” then getting crushed by double taxation when they pull profits out. The C Corp is a specialized tool, not a status symbol.

This is why working with professional entity formation services matters. The right structure at $50,000 is often wrong at $250,000, and the whole point is to match the entity to where your business actually is.

What If I Already Have the Wrong Entity?

Good news: entity structure is not permanent. If you are a default LLC and your profit has grown, you can file Form 2553 to elect S Corp status, usually effective for the current tax year if filed within the deadline (generally within two months and 15 days of the start of the tax year, or later with reasonable cause relief).

If you are a C Corp that should be an S Corp, you can make the S election as well, though you need to watch for built-in gains tax rules. Moving from an S Corp back to a C Corp is also possible but comes with a five-year waiting period before you can re-elect S status. The point is, you are rarely stuck. You just need to make the change deliberately rather than drifting along in a structure that no longer serves you.

Does the Entity Choice Affect My Audit Risk?

It can. S Corps draw IRS attention specifically on the “reasonable salary” question. If you pay yourself a $10,000 salary and take $190,000 in distributions, you are inviting scrutiny because the IRS sees that as an attempt to dodge payroll taxes. The fix is straightforward: set a defensible salary backed by market data and document it. A clean reasonable-compensation analysis is your best protection, and it is one of the first things we build for every S Corp client.

Frequently Asked Questions

Can I switch from an LLC to an S Corp without forming a new company?

Yes. An S Corp is a tax election, not a new legal entity. You keep your existing LLC and file Form 2553 to have it taxed as an S Corp. Your business name, EIN, and bank accounts all stay the same.

What counts as a reasonable salary for an S Corp?

A reasonable salary is what you would pay someone else to do your job, based on your industry, location, experience, and the work involved. The IRS looks at comparable wage data. Paying yourself an artificially low salary to maximize distributions is one of the most common triggers for an S Corp audit.

Is a C Corp ever better for a solo business owner?

Occasionally. If you reinvest nearly all profit, plan to raise outside capital, or want to take advantage of Qualified Small Business Stock gain exclusion under Section 1202, a C Corp can win. For owners who pull profit out annually, the double taxation usually makes it the most expensive option.

Stop Guessing and Lock In the Right Structure

Choosing between an LLC, S Corp, or C Corp is not a one-time box to check. It is a decision that should evolve as your profit grows, and getting it right can put five figures back in your pocket every year. Our strategy team will analyze your exact numbers, model all three structures side by side, and show you precisely which one keeps the most money in your business. Book your entity strategy session now and find out exactly how much the right structure could save you this year.

This information is current as of 10/30/2026. Tax laws change frequently. Verify updates with the IRS or FTB if reading this later.