Most business owners choose their entity structure once —usually when they’re just getting started— and never revisit it. That’s understandable. When you’re focused on building a business, tax optimization rarely feels urgent.
The problem is that the structure that made sense at $40,000 in revenue can quietly become a liability once you’re profitable. If you’re running a successful business as a sole proprietor or a standard LLC, there’s a real chance you’re handing the IRS more than you need to every single year.
One of the most effective tools for changing that is the S-Corp election. Here’s what it is, how the savings work, and how to know if it’s the right move for you. (If you’re still deciding whether your entity type is working in your favor at a broader level, our guide on whether your business structure might be quietly draining your profits is a good place to start.)
What Is an S-Corp Election?
This is where a lot of people get confused: an S-Corp is not a type of company you form. It’s a tax classification you elect with the IRS. You can keep your LLC exactly as it is and simply choose to have it taxed as an S-Corporation.
To make the election, you file Form 2553 (Election by a Small Business Corporation) with the IRS. There are specific deadlines —generally no later than two months and 15 days after the beginning of the tax year you want the election to take effect— so timing matters.
As a sole proprietor or default LLC, the IRS treats all of your net profit as earned income. That means the entire amount is subject to self-employment tax —currently 15.3%— which covers Social Security and Medicare.
With an S-Corp election, your business income is split into two buckets:
- A salary you pay yourself, which is subject to payroll taxes.
- Distributions from the remaining profit, which are not subject to self-employment tax.
That distinction is where the savings come from.
How the Math Works
Let’s say your business clears $120,000 in profit. As a default LLC, that entire amount is exposed to self-employment tax. You’re looking at roughly $17,000 going straight to Social Security and Medicare before you pay a dollar of income tax.
Under an S-Corp election, you might pay yourself a $70,000 salary and take the remaining $50,000 as a distribution. Only the salary portion is subject to payroll taxes. That $50,000 distribution avoids the self-employment tax entirely, which translates to roughly $7,500 in annual savings.
There is a catch, and it matters: the IRS requires that the salary you pay yourself reflects what someone in your role would actually earn in the market. Paying yourself $10,000 while taking $110,000 as a distribution is the kind of move that invites an audit. The IRS calls it “unreasonably low compensation,” and they take it seriously.
Getting the salary right is one of the most important parts of an S-Corp setup and one of the clearest places a good CPA earns their fee. The line between aggressive and reasonable isn’t always obvious, and it varies depending on your industry, location, and role.
When an S-Corp Election Makes Sense
An S-Corp election is not free. You’ll need to run payroll, file a separate business tax return (Form 1120-S), and handle additional administrative requirements throughout the year. Those costs are real, and they’re roughly fixed regardless of your income level.
That’s why the math only works above a certain profit threshold. As a general rule, once your business is consistently netting somewhere in the range of $40,000 to $50,000 in profit beyond your reasonable salary, the tax savings begin to outweigh the added cost and complexity.
Below that level, the election often costs more than it saves. Above it, every year you delay is money left behind.
Timing matters in both directions. Electing too early means paying for a structure you don’t yet benefit from. Waiting too long means overpaying the IRS year after year while your business grows.
Factors That Change the Calculation
Profit level is the starting point, but it’s not the whole picture. Several factors can significantly affect whether an S-Corp election makes sense for your specific situation:
- Your state. Some states impose their own taxes or fees on S-Corps that can offset a meaningful portion of the federal savings. California, for example, charges a minimum franchise tax on S-Corps of $800 per year, plus an additional 1.5% gross income tax. If you’re in a state with similar fees, that changes the break-even point.
- Business partners and ownership. S-Corps cannot have more than 100 shareholders and cannot include non-U.S. citizens or certain entity types as shareholders. If your ownership structure is complex, the S-Corp may not be eligible or may create friction down the road.
- Retirement contributions. How you structure your compensation directly affects how much you can contribute to a Solo 401(k) or SEP-IRA. A lower salary reduces your contribution ceiling, which may partially offset the payroll tax savings. This is one of the more nuanced tradeoffs, and it’s worth modeling before you elect.
- Health insurance deductions. S-Corp owners who pay for their own health insurance are treated differently than sole proprietors when it comes to the self-employed health insurance deduction. It’s still deductible, but it needs to be set up correctly through the corporation and included in W-2 wages. A common mistake that costs real money.
- Reinvestment plans. If most of your profit stays in the business rather than coming home to you, the distribution tax benefit is smaller. The election may still make sense, but the numbers shift.
Two businesses with identical revenue can land on completely different answers depending on these variables. This is exactly why a strategic tax plan tailored to your situation matters far more than any rule of thumb.
The Decision Matters More Than Most Business Owners Realize
Entity structure is one of the highest-leverage decisions you can make as a business owner. Unlike most business expenses, the savings here are recurring — they compound year after year. A $7,000 annual tax reduction is $70,000 over a decade.
If you’ve never reviewed whether your current structure is actually working in your favor, this is one of the most important conversations you can have. Not because the answer is always “switch to an S-Corp,” but because the analysis itself forces clarity on how your business is structured and what it’s actually costing you.
At RC CPAs, we run the numbers and tell you straight whether an S-Corp election makes sense for your business. Book a consultation.
