S-Corp vs. LLC vs. Sole Prop: The Brutal Tax Math Every Founder Needs | S-Corp tax, LLC tax, Sole Proprietor taxes | Tax Strategy insight from Fat Wallet SalesS-Corp vs. LLC vs. Sole Prop: The Brutal Tax Math Every Founder Needs | S-Corp tax, LLC tax, Sole Proprietor taxes | Tax Strategy insight from Fat Wallet Sales
🧮Tax Strategy3 min read▶ Video

S-Corp vs. LLC vs. Sole Prop: The Brutal Tax Math Every Founder Needs

Stop guessing your tax structure. This guide breaks down the cold, hard tax math of Sole Proprietor, LLC, and S-Corp to save you thousands in self-employment

October 8, 2026·Fat Wallet Sales · The Playbook
TL;DR

Choosing between Sole Proprietor, LLC, and S-Corp impacts your tax bill significantly, especially self-employment taxes. S-Corp election can save thousands by allowing you to pay yourself a reasonable salary and take the rest as distributio

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S-Corp vs. LLC vs. Sole Prop: The Brutal Tax Math Every Founder Needs

Starting a business is about making money, not giving it away to Uncle Sam. Yet, countless entrepreneurs blindly pick a business structure - Sole Proprietor, LLC, or S-Corp - without understanding the brutal tax math. This isn't about avoiding taxes; it's about optimizing your legal entity to pay what you owe, not a dime more. Understand this: the IRS views these entities differently, and those differences hit your wallet hard, especially when it comes to self-employment taxes. This isn't financial advice; it's education on how the tax code works for different business structures.

Sole Proprietor: The Easy Trap

Most people start as a Sole Proprietor. It's easy, requires no paperwork beyond local business licenses, and integrates seamlessly with your personal taxes. You report all your business income and expenses on Schedule C of your personal 1040. Sounds simple, right? It is, until you hit a certain income threshold, and the IRS decides you're a juicy target for self-employment taxes.

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As a Sole Prop, you pay 15.3% self-employment tax on your net business earnings. This covers Social Security (12.4% on earnings up to the annual limit) and Medicare (2.9% with no earnings limit). You also pay your ordinary income taxes on top of that. For a business bringing in real money, say $70,000 in net profit, that's over $10,000 right off the top, before a single federal income tax dollar is even calculated. It's a penalty for not structuring smartly.

LLC: Protection, Not Always Tax Savings

An LLC (Limited Liability Company) offers a crucial layer of liability protection. Your personal assets - house, car, savings - are generally shielded from business debts and lawsuits. This alone is worth the paperwork for most growing businesses. However, an LLC by itself doesn't change your tax situation much. By default, a single-member LLC is treated as a Sole Proprietor for tax purposes. A multi-member LLC is taxed as a partnership. Both still subject you to the full 15.3% self-employment tax on all net earnings.

So, while an LLC protects your personal assets, it doesn't automatically cut your tax bill. This is a common misconception. Many founders get an LLC and think they've unlocked some secret tax loophole, only to find their Schedule C tax burden unchanged. The magic comes when you elect for your LLC to be taxed differently. This is where the S-Corp election enters the scene.

Understanding which tax forms apply to your business structure is critical.
Understanding which tax forms apply to your business structure is critical.

S-Corp Election: The Self-Employment Tax Shield

Here's where the real money-saving move happens for many profitable small businesses. An S-Corporation - or an LLC that elects to be taxed as an S-Corp - allows you to pay yourself a

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