If you own a business in Miami, choosing the right entity structure is one of the most consequential tax decisions you will make. The difference between an LLC taxed as a sole proprietorship and an S-Corp election can mean thousands of dollars in annual tax savings, or thousands wasted on unnecessary complexity.
This guide breaks down the real numbers so you can make an informed decision. No jargon, no theory, just the math that matters.
The Core Tax Difference: Self-Employment Tax
The single biggest tax difference between an LLC and an S-Corp comes down to self-employment (SE) tax. SE tax is 15.3% and covers Social Security (12.4%) and Medicare (2.9%). As an LLC owner, you pay SE tax on your entire net business income.
With an S-Corp, you split your income into two categories: a reasonable salary (subject to payroll taxes) and distributions (not subject to SE tax). This split is where the savings come from.
The $40,000 Breakeven Threshold
The S-Corp election only makes financial sense when your net business income exceeds approximately $40,000 per year. Below that threshold, the additional costs of running an S-Corp, including payroll processing, separate tax returns, and compliance requirements, typically outweigh the SE tax savings.
Here is why: an S-Corp requires you to pay yourself a reasonable salary and run payroll. Payroll processing costs $50 to $150 per month. You need a separate S-Corp tax return (Form 1120-S), which costs $500 to $1,500 to prepare. These costs eat into your savings if income is too low.
Real Numbers: LLC vs S-Corp at Different Income Levels
| Net Income | LLC SE Tax | S-Corp Payroll Tax* | Annual Savings | Worth It? |
|---|---|---|---|---|
| $30,000 | $4,590 | $4,590 + $1,800 costs | -$1,800 | No |
| $50,000 | $7,650 | $4,590 + $1,800 costs | $1,260 | Maybe |
| $75,000 | $11,475 | $6,120 + $1,800 costs | $3,555 | Yes |
| $100,000 | $15,300 | $7,650 + $1,800 costs | $5,850 | Yes |
| $150,000 | $22,950 | $9,180 + $1,800 costs | $11,970 | Yes |
*Assumes reasonable salary of $30,000-$60,000 depending on income level. Actual reasonable salary varies by industry, role, and geographic area.
What Is a "Reasonable Salary"?
The IRS requires S-Corp owners who perform services for the business to pay themselves a "reasonable salary" before taking distributions. There is no fixed formula, but the IRS considers factors like the role you perform, comparable salaries in your industry, your experience, and the time you devote to the business.
Setting your salary too low is the fastest way to attract an IRS audit. A common rule of thumb: your salary should be at least 40-60% of net business income, or the going market rate for your role, whichever is higher.
Florida-Specific Advantages
Miami business owners have a built-in advantage: Florida has no state income tax. This means the S-Corp vs LLC decision is purely about federal taxes and SE tax, without the complication of state-level entity taxation that businesses in states like California or New York face.
Additionally, Florida does not impose a separate franchise tax on S-Corps (unlike many states), making the S-Corp election even more attractive for qualifying businesses.
The LLC Advantages: When Staying Simple Wins
- Simplicity: LLCs have fewer compliance requirements. No payroll, no separate business tax return (unless multi-member), and simpler bookkeeping.
- Flexibility: LLC members can distribute profits in any ratio agreed upon in the operating agreement, regardless of ownership percentages.
- Lower startup costs: LLCs are cheaper to form and maintain than S-Corps in most states.
- Loss utilization: LLC losses can offset other income on your personal return without the salary requirement complications of an S-Corp.
The S-Corp Advantages: When Tax Savings Justify Complexity
- SE tax savings: The primary advantage. At $100,000 net income, the savings can exceed $5,000 per year.
- Audit protection: S-Corps are audited at a lower rate than sole proprietors and single-member LLCs.
- Professional perception: S-Corps can project a more established business image to clients and vendors.
- Retirement planning: S-Corp owners can contribute to retirement accounts based on their W-2 salary, with the business deducting employer contributions.
How to Make the Switch
If you already have an LLC and want S-Corp treatment, you do not need to form a new entity. You file Form 2553 (Election by a Small Business Corporation) with the IRS. The deadline is March 15 of the tax year for which you want the election to be effective, or within 75 days of forming your LLC.
AI Tax Accountant can help you model both scenarios with your actual numbers. Upload your bank statements and our AI will show you exactly how much you could save with an S-Corp election versus your current structure.
Not sure if an S-Corp makes sense for your income level?
Use our free S-Corp Tax Savings Calculator to see your potential savings in seconds.Consult a qualified tax professional for advice specific to your situation.