LLC vs S-Corp: Which One Actually Saves You More
The S-corp election is the most oversold tax move in small business. It can genuinely lower your employment tax, but only under specific conditions and only after real costs. Here is how the two options are taxed, where the savings actually come from, and how to tell whether the switch is worth it for you.
How a default LLC is taxed
A limited liability company is a legal structure, not a tax category. By default the IRS does not tax an LLC as its own thing at all: a single-member LLC is treated as a disregarded entity (its profit and loss land on the owner's Schedule C), and a multi-member LLC is taxed as a partnership. In both cases the business itself pays no federal income tax; the profit "passes through" to the owners and is taxed on their personal returns.
The catch is self-employment tax. Because the owner of a default LLC is not an employee, the government collects Social Security and Medicare through the self-employment tax instead of payroll withholding. That tax runs at 15.3% (12.4% for Social Security up to an annual wage base, plus 2.9% for Medicare with no cap, and an additional 0.9% Medicare surtax above higher-income thresholds). Critically, it applies to all of your net profit from the business, on top of ordinary income tax.
For a founder netting a modest amount, that is simply the cost of being self-employed. But once the profit grows, the self-employment tax on every dollar becomes the single line most owners want to shrink, and that is exactly the door the S-corp election opens. If you want the wider view of how small business income is taxed first, start with our small business tax guide.
What the S-corp election changes
An S-corporation is a tax election, not a different company. An eligible LLC keeps its exact legal form and simply asks the IRS to be taxed under Subchapter S by filing Form 2553. Nothing about your liability protection, ownership, or bank accounts has to change. What changes is how the owner's pay is characterized.
Under the S election, an owner who works in the business becomes an owner-employee, and the company's profit is split into two streams:
- A reasonable salary paid through payroll, which is subject to FICA (Social Security and Medicare, split between the employer and employee shares)
- Distributions of the remaining profit, which are not subject to FICA or self-employment tax
The core idea in one line
A default LLC pays self-employment tax on every dollar of net profit. An S-corp pays FICA only on the salary portion, so the distribution portion escapes that employment tax entirely. The savings equal roughly 15.3% of whatever profit is legitimately shifted from salary to distributions.
That is the whole engine. It is also why the salary number is not a detail you get to pick freely: the smaller the salary, the larger the FICA-free distribution, which is precisely why the IRS polices the salary side so closely.
The reasonable compensation catch
The S-corp benefit is bounded by a single hard rule: an owner-employee must first pay themselves reasonable compensation for the services they actually perform, before taking distributions. This is where most of the internet gets it wrong.
There is no safe-harbor percentage
No statute, regulation, or IRS ruling sets a blessed 50/50, 60/40, or any other salary-to-distribution split. Reasonable compensation is a facts-and-circumstances test based on the value of the work you do: your role, hours, experience, and what comparable businesses pay for similar services. Any percentage you have seen is a rule of thumb someone invented, and it carries no weight in an examination.
Set the salary too low and you invite recharacterization: the IRS has long-standing authority, upheld by courts, to reclassify distributions as wages when an owner is undercompensated. The result is back payroll taxes on the reclassified amount, plus penalties and interest running from the original due dates. The savings you thought you captured turn into a bill, often across several years at once.
Because the salary number is where the risk lives, it deserves its own analysis. Our reasonable compensation guide walks through how the figure is actually built, what the leading case law says, and the documentation that stands up when someone asks for it.
The real cost of running an S-corp
The FICA savings do not arrive for free. An S-corp carries recurring compliance costs that a disregarded LLC never had, and honest math has to subtract them before calling the switch a win:
None of these are optional if you want the election to hold up. An S-corp that skips payroll, files late, or takes distributions with no salary is not saving money; it is accumulating exposure. The cost side of the ledger is the reason the election is not automatically right just because it is available.
Where the savings beat the costs
Put the two sides together and the decision becomes an arithmetic problem, not a slogan. The benefit is roughly 15.3% of the profit you can legitimately shift from salary into distributions. The cost is the ongoing payroll, the extra return, the added bookkeeping, and any state-level franchise tax. The election makes sense when the first number comfortably exceeds the second.
Why there is no magic number
Two businesses with identical profit can reach opposite answers. If most of your profit reflects your own billable labor, your reasonable salary is high and there is little distribution left to shield, so the savings are thin. If your profit comes largely from other employees, equipment, or products, your reasonable salary can be lower relative to profit, leaving a larger distribution to benefit. The crossover is a facts question, not a fixed threshold.
As a general pattern, many service businesses do not clear the added costs until net profit is well into the tens of thousands of dollars per year, and the case strengthens as profit rises. That is a starting intuition, not a promise. The only reliable way to know is to model your own numbers: your reasonable salary, your expected distributions, your state, and the real cost of the compliance you would be taking on.
California changes the math
California does not fully honor the federal S-corp deal. The state levies a 1.5% franchise tax on the S-corp's net income, and it enforces an $800 minimum franchise tax that applies in loss years too, owed every year after the first (new corporations are exempt from the $800 minimum in their first taxable year).
That state layer eats into the federal FICA savings. A California owner has to clear a higher bar before the election pays off, because the 1.5% tax and the $800 floor come out of the benefit. For many higher-profit California businesses the S-corp still wins; it simply wins by less, and at a higher profit level, than the federal math alone would suggest.
The takeaway is not "always elect" or "never elect." It is that the S-corp is a leverage tool that rewards enough profit and enough non-labor income to overcome its own overhead, and that your state can move the line. Run the numbers for your specific situation before you file anything.
Frequently asked questions
Disclaimer: This guide is for general informational purposes only and is current as of its publication date. Tax laws change frequently. Please consult a qualified tax professional for advice specific to your situation.
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Related Guides
Reasonable Compensation for S-Corp Owners
There is no IRS 50/50 safe harbor. How reasonable compensation is really set: the facts-and-circumstances factors, Watson v. Commissioner, the $0 salary audit trigger, and the documentation that holds up.
Best State to Form an LLC
Delaware, Wyoming, New Mexico, or your home state? Why most operating businesses should form where they actually do business, what franchise taxes and foreign qualification really cost, and the special rules for nonresident founders.
Foreign Earned Income Exclusion (Form 2555)
How to qualify for and claim the FEIE - Bona Fide Residence and Physical Presence tests, 2024/2025 exclusion limits, housing exclusion, and Form 2555 filing guidance.
Disclaimer: This guide is general information, not tax advice for your specific situation. Tax law changes, and how a rule applies depends on your facts. Reading this page does not create a client relationship with Arc & Ledger LLC. Before acting on anything here, confirm how it applies to your circumstances with a qualified tax professional.