If you run a single-member LLC, you are almost certainly paying more in taxes than you need to. The default tax treatment for a solo LLC hands the IRS a 15.3% self-employment tax on every dollar of profit, on top of your regular income tax. For freelancers and solo operators crossing the $50,000 net profit threshold, the S-Corp election can put thousands of dollars back in your pocket each year.
This guide breaks down exactly how each structure is taxed, what the math looks like at different income levels, and how to make the switch if it makes sense for you.
How a Single-Member LLC Is Taxed by Default
When you form an LLC without making any tax election, the IRS treats it as a disregarded entity. All of your business profit flows directly to your personal tax return on Schedule C. From there, two taxes hit you:
- Self-employment tax: 15.3% on the first $168,600 of net profit (2024 limit), then 2.9% on amounts above that
- Federal income tax: Based on your tax bracket, same as any other income
That 15.3% SE tax is the killer. It covers both the employee and employer sides of Social Security and Medicare. When you work for someone else, your employer pays half (7.65%) and you pay half. When you are self-employed, you pay both sides. On $100,000 of profit, that is $15,300 going straight to the IRS before income tax even starts.
You can deduct half of SE tax on your 1040, which softens the blow slightly, but it is still one of the most expensive taxes for solo business owners.
How the S-Corp Election Changes the Math
An S-Corp is not a separate business structure. It is a tax election you make on top of your existing LLC. Your LLC stays your LLC. You are simply asking the IRS to treat your LLC like an S-Corp for tax purposes.
Here is how it works in practice:
- You pay yourself a reasonable salary as an employee of your own company
- Payroll taxes (Social Security and Medicare) apply only to that salary
- Any remaining profit passes through to you as a distribution, not wages
- Distributions are not subject to self-employment tax
The IRS requires that your salary be “reasonable” for your industry and role. You cannot pay yourself $1 and take $200,000 in distributions. But you also do not have to pay yourself everything as salary. That gap between your total profit and your reasonable salary is where the S-Corp saves money.
For a concrete example: if your LLC earns $100,000 net and you pay yourself a $60,000 salary, you pay SE/payroll taxes on $60,000. The remaining $40,000 comes to you as a distribution with no SE tax attached. You just avoided $6,120 in self-employment taxes ($40,000 x 15.3%).
The Math at Different Income Levels
$40,000 Net Profit: S-Corp Probably Not Worth It
At $40,000 in annual profit, the S-Corp election barely makes sense. Your reasonable salary would likely need to be close to $35,000-40,000 for your industry. The tax savings on a small distribution would be $1,000 or less. But the costs of running an S-Corp (more on that below) would eat most or all of that savings. Stay as a default LLC at this income level.
$80,000 Net Profit: Saves $4,000-6,000 Per Year
This is where the S-Corp election starts to make real sense. With $80,000 in profit, you might pay yourself a $50,000 salary and take $30,000 as distributions. The SE tax savings on $30,000 is roughly $4,590. After S-Corp costs, your net savings are typically in the $2,000-4,000 range. Not life-changing, but meaningful.
$150,000+ Net Profit: Saves $10,000 or More Per Year
At higher income levels, the S-Corp election becomes a no-brainer. With $150,000 in profit and a $75,000 reasonable salary, you are shielding $75,000 from SE tax. That is roughly $11,475 in savings. Even after paying for payroll software, an accountant, and quarterly filings, you likely keep $8,000-10,000 more per year.
The Real Costs of an S-Corp Election
The S-Corp is not free. These are the ongoing costs you need to factor in:
- Payroll software: You must run actual payroll, with pay stubs and W-2s. Tools like Gusto or QuickBooks Payroll run $40-100/month
- Accountant or CPA: S-Corp tax returns (Form 1120-S) are more complex than Schedule C. Expect $800-2,000/year more than you would pay as a sole proprietor
- Quarterly payroll tax filings: Form 941 each quarter, plus state equivalents
- State fees: Some states charge additional franchise taxes or fees for S-Corps
Total added cost per year: roughly $1,500-3,000. This is your breakeven floor.
The Breakeven Point
Most CPAs put the S-Corp breakeven at $50,000-60,000 in net profit. Below that threshold, the compliance costs outweigh the tax savings. Above it, you are likely leaving money on the table by staying as a default LLC.
If your net profit is hovering around that range, talk to a CPA before making the election. The right answer depends on your industry, your reasonable salary benchmark, and your state tax situation.
How to Elect S-Corp Status
Making the S-Corp election is straightforward. You file IRS Form 2553 with the IRS. Key details:
- The deadline is 75 days from the start of the tax year you want the election to take effect (so by March 15 for a January 1 start)
- If you miss the deadline, you can still file a late election with a reasonable cause explanation, and the IRS often grants them
- All shareholders (just you, for a single-member LLC) must sign the form
- Once elected, the status stays in effect until you revoke it
Before you file, make sure you have your payroll setup in place, because you will need to start running payroll immediately once the election is effective.
Should You Do It?
The S-Corp election is one of the most powerful tax tools available to solo business owners, but it only makes sense above a certain income level. If your net profit is above $60,000 and growing, the math almost always favors the election. If you are still building toward that threshold, focus on growing revenue first and revisit the question when your income supports it.
Once you have your tax structure sorted, the next step is making sure you are actually paying yourself correctly. Read our guide on how to separate personal and business finances to set up the right system for owner draws and distributions. You should also understand how 1099 income is reported if you have clients paying you as a contractor, since that affects your SE tax exposure.
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