LLC vs S Corp: Why Entity Choice Matters More Than You Think

Most business owners treat entity selection like picking a business name. They grab whatever's available, file the paperwork, and move on.

Here's the uncomfortable truth: that decision compounds over the life of your business—in taxes, in protection, in flexibility. Get it right early, and you build on solid ground. Get it wrong, and you're paying for it every April 15th for the next decade.

What I've learned helping Michigan business owners navigate these decisions is that the "right" answer depends entirely on where you're trying to go. Let me walk you through what actually matters.

The $5,000 Question Nobody Asks

Here's a number that stops conversations: $14,130.

That's approximately what a single-member LLC owner with $100,000 in profit pays in self-employment tax. Every year. Just in self-employment tax—not income tax.

The Same Business, Different Structure:

How this works: With an S corp election, you pay yourself a $60,000 salary (subject to payroll taxes), while the remaining $40,000 flows through as distributions—not subject to self-employment tax.

Over a decade? That's $50,000—a down payment on a house you're handing to the IRS because nobody explained your options.

It's the equivalent of paying full sticker price on every car you buy because nobody told you negotiation was an option. The tax code allows this structure. You just have to know to ask.

What We're Actually Comparing

Let me cut through the noise. Here's what matters:

The LLC (Default Setup)

When you form an LLC and do nothing else, the IRS treats it as a "disregarded entity" (single-member) or a partnership (multi-member). All profit flows through to your personal tax return. Simple.

The catch? Every dollar of profit gets hit with self-employment tax—15.3% (12.4% Social Security, 2.9% Medicare) on 92.35% of net earnings.

The S Corp Election

Here's where it gets interesting. You don't form an S corp—you elect S corp tax treatment for your existing LLC by filing Form 2553 with the IRS.

Your LLC stays an LLC legally. But for tax purposes, the IRS treats it differently. You pay yourself a "reasonable salary" (subject to payroll taxes), and the remaining profit passes through as distributions (NOT subject to self-employment tax).

The Numbers in Practice

At $120,000 profit, savings grow to roughly $5,600/year. At $200,000? We're talking $10,000+ annually.

The Operating Agreement: The Document That Actually Matters

This catches business owners off guard when disputes arise. "But we agreed..." doesn't mean anything in a Michigan courtroom if there's no written document.

Why Judges Care About This Document

When disputes arise—and they always arise eventually—courts look to your operating agreement first. It's the primary evidence of what the members actually intended.

Without one? The court applies default state rules that might have nothing to do with your actual arrangement. Partners split profits equally regardless of contribution. Major decisions require unanimous consent. Dissolution happens whenever any member says so.

Is that what you want? Because that's what you get by default.

What It Actually Needs

The math is straightforward:

Which would you rather pay?

Even Single-Member LLCs Need One

"But I'm the only owner. Who am I making an agreement with?"

Yourself. Your future self. Your creditors. Any bank that might want to see documentation. The court that might someday evaluate whether your LLC is actually a separate entity or just an alter ego.

A single-member LLC operating agreement establishes that you treat this business as a real, separate entity—not just a checking account with a fancy name. That documentation matters when someone tries to "pierce the veil" and come after your personal assets.

Need an operating agreement? let's talk. Whether you're forming a new LLC or realizing your existing one isn't properly documented, getting this right from the start costs a fraction of fixing it later.

The Delaware Question (And Why the Answer Is Usually "No")

Every few months, someone asks: "Should I incorporate in Delaware? I heard that's what the big companies do."

Yes, 60%+ of Fortune 500 companies are incorporated in Delaware. They have sophisticated reasons for that involving the Court of Chancery, predictable case law, and complex multi-state tax planning.

But here's what most articles don't tell you: Delaware incorporation rarely makes sense for small businesses operating locally.

What Delaware Actually Gives You

So you're paying an extra $400-500+ per year for benefits that rarely apply to Michigan small businesses.

When Delaware Actually Makes Sense

Bottom line: For most Michigan small businesses, Michigan incorporation is simpler, cheaper, and provides equivalent protection.

When To Make the S Corp Election

This is probably the most practical advice I can give you:

The key word is "consistently." One good year doesn't justify restructuring. Three good years means you should probably have done this already.

The Process

Filing Form 2553 is straightforward but time-sensitive:

• Submit within 2 months and 15 days of the start of the tax year you want S corp treatment
• All LLC members must consent
• You must meet eligibility requirements (no more than 100 shareholders, all U.S. residents, one class of stock)

Miss the deadline? You can request late election relief if you have reasonable cause, but it's messier. Plan ahead.

The "Reasonable Salary" Trap

Here's where business owners get in trouble: they elect S corp status, then pay themselves $25,000 on $200,000 profit to minimize payroll taxes.

The IRS catches this. Regularly.

"Reasonable salary" means what someone with your skills and responsibilities would earn doing the same work for someone else. Industry data matters. Your role matters. If you're a consultant billing $200/hour, a $25,000 salary isn't reasonable—it's a red flag.

Get this wrong, and the IRS reclassifies your distributions as wages, hits you with back payroll taxes, and adds penalties and interest. The savings you thought you captured disappear plus extra.

Work with a CPA who understands this. Document your salary justification. Don't get greedy.

Liability Protection: What Actually Keeps You Safe

The LLC's main job is creating a wall between your business and your personal life. Business creditors can pursue business assets—your equipment, inventory, business bank accounts. They generally can't touch your house, personal savings, or personal vehicles.

But that wall isn't magic. It requires maintenance.

What Breaks the Wall

Single-Member LLC Vulnerability

Here's something most business owners don't hear: single-member LLCs have weaker protection in some situations.

Against business creditors, you're generally fine. But personal creditors (from your own debts, not business debts) may be able to foreclose on or even dissolve a single-member LLC to reach the underlying assets.

Multi-member LLCs have stronger "charging order" protection because courts are reluctant to interfere with other members' interests.

This doesn't mean single-member LLCs are bad—just that adequate insurance becomes even more important. Don't rely solely on the entity structure for protection.

The Real Decision Framework

Forget the legal technicalities for a moment. Here's how to think through this:

→ Where Are You in Your Business?

→ What's Your Tolerance for Complexity?

→ What Are You Actually Worried About?

The reality: There's no universal "best" structure. There's only the best structure for your specific situation, goals, and risk tolerance.

Common Mistakes to Avoid

What To Do Next

If you're starting a business:

1. Form your LLC properly (Michigan for Michigan businesses)
2. Get a written operating agreement—even if you're the only member
3. Project your income realistically for the next 3 years
4. If profit will exceed $50-80k, model the S corp election with your CPA
5. Set up separate business banking and accounting from day one

If you have an existing business:

1. Do you have a written operating agreement? If not, fix that immediately.
2. When did you last review your structure with professional advice?
3. Are you paying more self-employment tax than necessary?
4. Has anything changed (partners, profit levels, risk exposure) that affects your structure?

The Bottom Line

Entity choice isn't about picking the "right answer" from a multiple choice test. It's about understanding your specific situation—where you are now, where you're going, what keeps you up at night—and building a structure that serves those realities.

The business owners who get this right work with advisors who understand both the numbers AND the human side of running a business. They make informed decisions, document everything properly, and review periodically as circumstances change.

The ones who get it wrong treat formation as a checkbox exercise, skip the operating agreement, and wonder years later why they're bleeding money in taxes or exposed in ways they never anticipated.

Your entity structure is the foundation everything else builds on. Make it solid.

Ready to evaluate your entity structure? schedule a strategy call. Whether you're questioning your current setup or forming something new, we'll look at your actual numbers, your goals, and your risk tolerance—not just give you a generic answer.