LLC vs S-Corp: Which Business Structure Saves More Taxes?
The LLC versus S-Corp decision is one of the most common — and most misunderstood — tax questions among self-employed professionals and small business owners. Both structures offer liability protection, both are "pass-through" entities that avoid corporate-level taxation, and both are legitimate choices. The difference comes down to self-employment taxes, payroll requirements, administrative overhead, and the specific profit level at which one becomes more advantageous than the other. This guide breaks down the tax math with concrete numbers so you can make an informed decision for your situation.
How a Default LLC Is Taxed
When you form a single-member LLC and do not make any special tax elections, the IRS ignores the LLC entirely for tax purposes. Your business income and expenses flow directly to Schedule C of your personal Form 1040. This is called "disregarded entity" treatment.
The tax consequences are significant. Your net profit — revenue minus deductible business expenses — is subject to two taxes:
- Self-Employment (SE) Tax: 15.3% on the first $176,100 of net profit (2026 Social Security wage base), then 2.9% on everything above that. You can deduct half of SE tax as an above-the-line adjustment, but the effective rate on the first dollar of profit is still steep.
- Income Tax: Your ordinary federal and state income tax rates applied to net profit minus the SE tax deduction.
Example: LLC Owner Earning $100,000 Net Profit
Net profit after business expenses: $100,000
Self-employment tax: $100,000 × 0.9235 (adjustment factor) × 15.3% = $14,130
SE tax deduction (half of SE tax): $7,065
Adjusted gross income for income tax: $100,000 − $7,065 = $92,935
Federal income tax (single filer, 2026 brackets, standard deduction): approximately $12,000
Total federal tax burden: approximately $26,130
That $14,130 in self-employment tax is the number an S-Corp election is designed to attack. Every dollar of business income a sole proprietor earns through a default LLC is subject to SE tax. An S-Corp election splits that income into two components, and only one of them faces SE tax.
How an S-Corp Reduces Self-Employment Tax
When your LLC elects S-Corp status, you become both an owner and an employee of your company. The IRS requires you to pay yourself a reasonable salary for the work you perform. That salary goes through payroll and is subject to payroll taxes (FICA). But any remaining profit — the amount above your salary — flows to you as an owner distribution, and distributions are NOT subject to self-employment or payroll taxes.
This salary/distribution split is the entire tax benefit of the S-Corp election.
Example: S-Corp Owner Earning $100,000 Net Profit
Suppose you pay yourself a reasonable salary of $55,000 and take the remaining $45,000 as a distribution.
Payroll taxes on $55,000 salary:
- Employee share of FICA: $55,000 × 7.65% = $4,208
- Employer share of FICA: $55,000 × 7.65% = $4,208 (deductible business expense)
- Total payroll tax: $8,416
Payroll taxes on $45,000 distribution: $0
Total payroll tax: $8,416 versus $14,130 under the default LLC.
SE Tax Savings: $14,130 − $8,416 = $5,714 per year
Your federal income tax bill is similar under both structures (the S-Corp salary is deductible at the entity level but included in your personal income), so the net savings is essentially the SE tax differential — roughly $5,700 in this example.
The "Reasonable Salary" Requirement
The IRS is well aware of the salary/distribution strategy and specifically looks for S-Corp owners who pay themselves an unreasonably low salary to minimize payroll taxes. The requirement for a "reasonable salary" is one of the most scrutinized areas of small business taxation.
There is no formula that defines exactly what is reasonable, but the IRS looks at:
- What similar businesses pay employees in the same role
- Your training, experience, and duties
- The size and complexity of your business
- What you paid employees in similar roles at your company
- Bureau of Labor Statistics wage data for your occupation
Common professional guidelines suggest paying yourself 40 to 60 percent of net profit as salary, or benchmarking against your profession's median wage. A consultant earning $200,000 in revenue who pays themselves $20,000 in salary would attract IRS scrutiny. The same consultant paying $85,000 in salary would be on much safer ground.
Document your salary rationale in writing. Have your accountant prepare a memo each year explaining the basis for your compensation. If you are ever audited, this documentation is critical.
S-Corp Overhead Costs: The Hidden Price Tag
The SE tax savings from an S-Corp are real, but they come with administrative costs that a default LLC does not have. Before converting, you need to run the numbers net of these expenses.
Payroll Processing
An S-Corp owner-employee must process payroll at least quarterly (most advisors recommend monthly or biweekly). Payroll services like Gusto, ADP, or Paychex typically charge $50 to $150 per month for a single-employee company. Annual cost: $600 to $1,800.
Corporate Tax Return (Form 1120-S)
S-Corps file a separate federal corporate tax return (Form 1120-S) plus any required state returns. This is more complex than a Schedule C and most CPAs charge an additional $500 to $1,500 per year for the corporate return on top of your personal return. Annual cost: $500 to $1,500.
State Fees and Franchise Taxes
Many states charge annual franchise taxes or fees for S-Corps that single-member LLCs do not pay. California, for example, charges a minimum $800 annual franchise tax for S-Corps. Other states have various fees or require a separate state S-Corp election with its own filing costs. Annual cost: $0 to $1,000+ depending on state.
Total Annual Overhead: $1,500 to $3,000+
Before your S-Corp election saves you a single dollar, you need to exceed $1,500 to $3,000 in administrative costs. This is why the conversion does not make sense at lower profit levels.
The Break-Even Profit Point for S-Corp Conversion
The question every LLC owner asks: at what income level does the S-Corp election become worth it?
The answer depends on your salary ratio, state taxes, and specific overhead costs — but a useful rule of thumb is $60,000 to $80,000 in annual net profit.
The Math at Different Profit Levels
$50,000 net profit (40% salary = $20,000, 60% distribution = $30,000):
- SE tax as LLC: $50,000 × 0.9235 × 15.3% = $7,065
- Payroll tax as S-Corp on $20,000 salary: $3,060
- Gross SE tax savings: $4,005
- Less overhead costs ($2,000): Net savings = $2,005
- Verdict: Marginal. Likely not worth it.
$100,000 net profit (55% salary = $55,000):
- SE tax as LLC: $14,130
- Payroll tax as S-Corp: $8,416
- Gross SE tax savings: $5,714
- Less overhead costs ($2,500): Net savings = $3,214
- Verdict: Worth it. Saves over $3,000/year.
$200,000 net profit (45% salary = $90,000):
- SE tax as LLC: $26,649 (Note: Social Security caps at $176,100, so only 2.9% Medicare on income above that)
- Payroll tax as S-Corp on $90,000: $13,770
- Gross SE tax savings: $12,879
- Less overhead costs ($3,000): Net savings = $9,879
- Verdict: Strongly worth it.
State-Specific Considerations
Federal taxes are only part of the picture. State tax treatment of S-Corps varies significantly and can either amplify or erode the savings.
States to watch:
- California: Charges both the $800 minimum franchise tax and a 1.5% S-Corp tax on net income. The state does not recognize the federal S-Corp election — you must file separately. At $100,000 income, the California S-Corp tax alone is $1,500, significantly reducing the net benefit.
- New York City: Imposes an Unincorporated Business Tax (UBT) on LLCs but generally exempts S-Corp salaries. The UBT relief can actually make S-Corps more attractive in NYC.
- Texas, Florida, Nevada: No state income tax. The S-Corp election saves only federal SE taxes, which is still substantial, and these states have minimal S-Corp overhead costs.
- Illinois, Pennsylvania: These states recognize S-Corp status and the pass-through income is taxed at flat individual rates, generally favorable for the S-Corp election.
Always run your specific numbers with a local CPA before making the election. The federal analysis is the foundation, but state rules can meaningfully change the outcome.
When to Stay as a Default LLC
The S-Corp election is not the right move for everyone. Consider staying as a default LLC if:
- Your net profit is below $60,000. The overhead costs may exceed or nearly equal the tax savings.
- Your income is unpredictable or seasonal. Running payroll when you have inconsistent income is administratively complex and can create cash flow stress.
- You are in a high-overhead S-Corp state like California. Run the state-specific numbers before assuming federal savings translate to total savings.
- You plan to sell the business soon. S-Corp elections add complexity to business sales, especially for asset acquisitions, and can sometimes reduce the tax efficiency of an exit.
- You want simplicity. The default LLC is genuinely simple. One tax return, no payroll, minimal administrative overhead. For many small business owners, the peace of mind is worth the extra SE tax.
How to Make the S-Corp Election
If you decide the S-Corp makes sense, here is the process:
- Ensure you qualify. S-Corps are restricted to US citizens or permanent residents, a maximum of 100 shareholders, and only one class of stock. Single-member LLCs easily qualify.
- File IRS Form 2553. This elects S-Corp status for federal taxes. File by March 15 for it to apply to the current tax year, or within 75 days of your business formation date.
- File any required state forms. Some states require a separate state S-Corp election. Your CPA will know the requirements for your state.
- Set up payroll. Use a payroll service to handle withholding, deposits, and quarterly filings. Do not try to manage this manually — the penalties for payroll errors are steep.
- Document your reasonable salary. Work with your CPA to determine and document an appropriate salary before your first payroll run.
Frequently Asked Questions
At what income level does an S-Corp save money?
Most tax professionals recommend considering an S-Corp election when your net self-employment profit exceeds $60,000 to $80,000 per year. Below that threshold, the administrative overhead of running payroll, filing a separate corporate tax return, and paying a payroll provider typically exceeds the SE tax savings. At $80,000 net profit, the savings are roughly $3,000 to $5,000 per year depending on your reasonable salary. At $150,000 net profit, savings can reach $8,000 to $12,000 annually.
What is a reasonable salary for an S-Corp owner?
The IRS requires S-Corp owner-employees to pay themselves a salary comparable to what you would pay someone else to do the same work. Common approaches include paying yourself 40 to 60 percent of your net profit as salary, or benchmarking against Bureau of Labor Statistics data for your occupation. For a consultant earning $120,000 in revenue, a salary of $50,000 to $70,000 is typically defensible. Your accountant should document the rationale each year.
Can an LLC be taxed as an S-Corp?
Yes. An LLC can elect S-Corp taxation by filing IRS Form 2553. The LLC keeps its legal structure but is treated as an S-Corp for federal tax purposes. This is the most common setup for small businesses that want S-Corp tax benefits without formally incorporating. The election must generally be made by March 15 for the current tax year, or within 75 days of formation for a new business.
What are the hidden costs of an S-Corp?
Running an S-Corp adds real overhead: payroll processing fees ($600 to $1,800 per year), a separate S-Corp tax return costing $500 to $1,500 more than a Schedule C, and state-level franchise taxes or fees that vary by state. Total extra overhead typically runs $1,500 to $3,000 per year for a solo business owner, which is why the election only makes financial sense above approximately $60,000 in annual net profit.