Choosing the right business structure is one of the most important financial decisions you'll make as a business owner. Both LLCs and S-Corps offer liability protection, but they differ dramatically in how they're taxed. Understanding the nuances can mean the difference between keeping more of what you earn and overpaying the IRS.
Let's start with the defaults. An LLC with a single member is taxed as a sole proprietorship by default. All profits and losses flow directly to your personal tax return, and you're subject to self-employment tax on the entire net profit. A multi-member LLC is taxed as a partnership by default, with similar pass-through taxation but with the added complexity of partnership returns.
An S-Corp election changes this dynamic. When you file Form 2553 to elect S-Corp status, your LLC (or corporation) becomes a pass-through entity for income tax purposes—but with a crucial twist. You must pay yourself a reasonable salary, which is subject to payroll taxes. Any additional profits can be taken as distributions, which are NOT subject to payroll taxes.
This is where the significant tax savings come in. Let's compare the two structures with a concrete example.
Imagine you run a consulting business with $250,000 in net profit. As a single-member LLC (sole proprietorship), you'd pay self-employment tax of 15.3% on the entire $250,000—that's $38,250. Add your income tax, and your total tax burden is substantial.
As an S-Corp, you pay yourself a reasonable salary of $100,000, which is subject to payroll taxes of $15,300. The remaining $150,000 flows to you as distributions, free from payroll taxes. You've just saved $22,950 in self-employment tax alone.
