Somewhere around six figures of profit, almost every business owner hears the same advice: elect S-Corp status and cut your tax bill. The advice is often right, and sometimes expensively wrong. The LLC vs S-Corp question is not really about which entity you form. It is about how your profit gets taxed, how much of it flows into self-employment tax, and whether the savings from an S-Corp election outweigh the real costs of running one. This guide walks through the rules, the math, and the situations where each answer wins, with worked dollar examples.
The short answer
For many owners with consistent net profit above roughly $60,000 to $80,000, an S-Corp election may reduce total tax, mainly by lowering self-employment tax on part of the profit. Below that range, the added costs of payroll, a separate business return, and state fees often consume the savings. Above it, the benefit generally grows with profit, subject to a reasonable salary requirement and your state’s treatment of S-Corporations. The rest of this article shows why, so you can pressure-test the decision against your own numbers.
What the LLC vs S-Corp comparison really means
Here is the detail most articles skip: an S-Corp is not a type of entity. It is a tax classification you request from the IRS, usually by filing Form 2553. A limited liability company is a legal structure created under state law. The two are not competitors. In practice, the most common setup is an LLC that keeps its legal structure and simply elects to be taxed as an S-Corporation. So the real question is not which one to form. It is which tax treatment your existing or future LLC should use.
The default LLC
By default, a single-member LLC is disregarded for federal income tax. Its profit lands on Schedule C of your personal return, and a multi-member LLC files as a partnership with a similar result for each owner. The structure is simple and cheap to maintain. The catch is that the entire net profit is generally subject to self-employment tax, in addition to ordinary income tax. Whether you leave the money in the business or take it out makes no difference. The IRS taxes it either way.
The S-Corp election
Once the election is in place, the business files its own return, Form 1120-S, and you become an employee of your company. You must pay yourself a reasonable salary through payroll, and that salary is subject to Social Security and Medicare taxes. However, the remaining profit can flow to you as a distribution, and distributions are generally not subject to self-employment tax. That split between salary and distributions is where the potential savings live. The salary cannot be a token amount. We cover how to set it correctly in our guide to S-Corp reasonable compensation, and the IRS explains the framework on its S-Corporations page.
How self-employment tax drives the decision
Self-employment tax runs 15.3% on most of your net profit. It combines 12.4% for Social Security and 2.9% for Medicare, applied to 92.35% of net earnings. The Social Security portion stops at an annual wage base that adjusts each year, but the Medicare portion has no cap. In addition, an extra 0.9% Medicare tax applies above $200,000 of earned income for single filers, or $250,000 for joint filers. The IRS details the mechanics on its self-employment tax page.
Notice what this tax does not care about: your deductions for mortgage interest, your dependents, or your itemizing decisions. It applies to business profit before any of that. For a profitable owner, it often becomes one of the largest single line items on the return. That is why the S-Corp conversation always starts here. Income tax is broadly similar under both structures. Self-employment tax is where the two treatments diverge.
A worked example: $150,000 of profit
Assume an LLC with $150,000 of net profit and a single owner. As a default LLC, roughly $138,525 of that profit (92.35%) is exposed to the 15.3% rate, producing self-employment tax of about $21,200. Now assume the same business elects S-Corp status and pays the owner a defensible salary of $65,000, with the remaining profit taken as distributions. Payroll taxes on the salary total about $9,945, combining the employee and employer shares. The distributions escape self-employment tax entirely.
| Default LLC | LLC taxed as S-Corp | |
|---|---|---|
| Net profit | $150,000 | $150,000 |
| Owner salary | Not applicable | $65,000 |
| Amount exposed to SE or payroll tax | About $138,525 | $65,000 |
| SE or payroll tax | About $21,200 | About $9,945 |
| Gross difference | About $11,250 in favor of the S-Corp | |
| Estimated admin costs | Minimal | $2,000 to $3,500 per year |
| Net potential benefit | Roughly $8,000 to $9,000 per year | |
This is a simplified illustration. It ignores the deduction for the employer share of payroll taxes, the deduction for half of self-employment tax, state taxes, and the QBI interaction discussed below. Real results vary with the facts. Even so, the shape of the math holds: the S-Corp shrinks the base exposed to the 15.3% rate, and the savings scale as profit grows above a reasonable salary.
What running an S-Corp actually costs
The election is free. Operating under it is not. First, you need a real payroll system, with quarterly filings, W-2s, and withholding deposits. A payroll service typically runs $500 to $1,200 per year. Second, the business must file Form 1120-S, a separate return that usually adds $800 to $2,000 in preparation fees. Third, some states impose their own charges. California, for example, levies a 1.5% franchise tax on S-Corp net income with an $800 minimum, and a few jurisdictions do not recognize the federal election at all for local taxes.
There are quieter costs as well. Your salary, not your total profit, generally sets the base for Social Security credits and for employer retirement plan contributions, so an aggressively low salary can shrink what you can put into a Solo 401(k). Bookkeeping discipline also matters more, because commingling funds or skipping payroll invites IRS scrutiny. None of these costs is a reason to avoid the election. They are the reason the election needs enough profit behind it to be worth the overhead.
When the S-Corp election tends to make sense
The strongest candidates share a few traits. In practice, the election tends to pay off when:
- Net profit consistently exceeds roughly $60,000 to $80,000 and is expected to stay there or grow.
- The business earns active income from services or sales, rather than passive rental income.
- A reasonable salary for your role would be meaningfully lower than your total profit, leaving real room for distributions.
- Your state does not tax S-Corporations so heavily that it erases the federal benefit.
- You are willing to run formal payroll and keep clean books all year.
For an owner clearing $250,000 or more, the annual difference can reach five figures, though the exact number depends on the salary the facts support. Pairing the election with an accountable plan and other owner strategies compounds the benefit, as we outline in how to pay yourself as an LLC.
When staying a default LLC is smarter
The S-Corp is not a universal upgrade. If profit is modest or unpredictable, the fixed costs of payroll and an extra return can exceed the savings. If most of your income already comes from W-2 wages that reach the Social Security wage base, the incremental benefit shrinks, because part of the 15.3% would not have applied anyway.
Real estate deserves a special warning. Rental income is generally not subject to self-employment tax in the first place, so an S-Corp solves a problem landlords do not have. Worse, holding appreciating property inside an S-Corporation can trigger taxable gain when the property comes out, a problem partnerships and default LLCs avoid. Most experienced investors keep rentals in LLCs taxed as partnerships or disregarded entities. Eligibility rules also matter: S-Corps cannot have more than 100 shareholders, and shareholders generally must be U.S. individuals or certain trusts, which rules out foreign owners and most entity partners.
The QBI wrinkle
One more moving part deserves attention. The qualified business income deduction lets many pass-through owners deduct up to 20% of qualified business income. Your S-Corp salary is not QBI, so raising your salary lowers the profit eligible for the deduction. At higher incomes, though, the deduction phases in a W-2 wage test, and paying yourself wages can actually preserve a deduction that would otherwise shrink. The interaction cuts both ways, which is why the salary decision should be modeled, not guessed. Our breakdown of the QBI deduction under Section 199A covers the thresholds in detail.
Frequently asked questions
Can I convert my existing LLC to S-Corp taxation?
Yes. You keep the same LLC and file Form 2553 with the IRS. The election is generally due within two months and fifteen days of the start of the tax year it should take effect, and late-election relief is often available when requirements are met.
Does the S-Corp election change my liability protection?
No. Legal protection comes from the LLC or corporation itself under state law. The S-Corp election only changes how the IRS taxes the profit. Your liability shield stays the same either way.
What happens if my salary is too low?
The IRS can reclassify distributions as wages, assess back payroll taxes, and add penalties and interest. Reasonable compensation is the single most audited issue for S-Corps, which is why the salary should be documented and defensible, not simply minimized.
The bottom line
The LLC and the S-Corp election are tools, and the right one depends on your profit level, your income mix, your state, and your plans. As a rule of thumb, steady six-figure profit from an active business makes the S-Corp worth modeling, while low profit, heavy W-2 income, or rental real estate usually argues for staying with the default. The worst outcome is choosing by hearsay in either direction, because the decision is measurable with your own numbers.
If you want to see which strategies may apply to your situation, start with our free guide, Top 5 Tax Strategies for High-Income Earners. When you are ready for the complete framework of more than 100 strategies, explore the ETS Playbook.
The strategies described here are general educational information about the U.S. tax code. Individual results vary based on income, entity structure, state law, and other factors. This is not personalized tax, legal, or financial advice. Consult a licensed tax professional before implementing any strategy.
