Compare the tax impact of operating as an S-Corporation vs a Limited Liability Company. Calculate your self-employment tax, payroll tax, QBI deduction, and total tax burden to determine which business structure saves you the most money in 2026.
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✅ S-Corp Saves You Money
$0
Based on your inputs, here is the comparison.
🏢 LLC (Sole Proprietor)
Self-Employment Tax$0
SE Tax Deduction (50%)$0
QBI Deduction (20%)$0
Income Tax$0
Total Tax Due$0
Effective Tax Rate0%
Admin Cost (annual)$100–$800
🏛️ S-Corporation
Payroll Tax (Employer + Employee)$0
Employer Payroll Tax (Business Deduction)$0
Distributions (Not Subject to SE Tax)$0
QBI Deduction (20%)$0
Income Tax$0
Total Tax Due$0
Effective Tax Rate0%
Admin Cost (annual)$500–$2,000
📊 Tax Savings Summary
$0
Total tax savings with S-Corp (before admin costs).
S-Corp admin costs are typically $500–$2,000/year higher than LLC.
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Side-by-Side Comparison
Compare LLC and S-Corp tax outcomes in a single view. See self-employment tax, payroll tax, QBI deductions, and effective tax rates for both structures simultaneously.
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Tax Savings Analysis
Instantly calculate your potential tax savings from electing S-Corp status. Based on 2026 IRS projections including SS wage base ($180K), SE tax rates, and QBI phase-out thresholds.
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Reasonable Salary Guidance
Determine the optimal salary level for your S-Corp. The IRS requires reasonable compensation — our calculator shows how salary affects payroll tax, distributions, and overall tax burden.
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Clear Recommendation
Get an instant recommendation with total tax comparison, savings percentage, and admin cost analysis to help you decide whether S-Corp election is right for your business.
LLC vs S-Corp: Feature Comparison
Understanding the fundamental differences between LLCs and S-Corps is essential for choosing the right business structure. While both offer limited liability protection, they differ significantly in taxation, compliance requirements, and operational flexibility. The table below summarizes the key differences to help you make an informed decision.
Feature
LLC
S-Corp
Self-Employment Tax
All net profit subject to SE tax (15.3% + additional Medicare)
Only salary subject to payroll tax; distributions are tax-free
Tax Filing
Schedule C with personal tax return (Form 1040)
Form 1120-S (corporate return) + Schedule K-1 to shareholders
QBI Deduction (199A)
20% of net profit, subject to phase-out limits
20% of profit after employer payroll tax deduction
Ownership Restrictions
No restrictions on number or type of owners
Max 100 shareholders, all must be US citizens/residents
Reasonable Salary Requirement
No salary requirement
Must pay reasonable compensation to owner-employees
Administrative Complexity
Minimal — annual state filing, no separate tax return
Form 2553 must be filed within 75 days of formation or by March 15 of the tax year
Annual Admin Cost
$100–$800/year
$500–$2,000/year
Audit Risk
Lower (standard Schedule C)
Higher (IRS scrutinizes reasonable salary and distributions)
2026 Social Security wage base: ~$180,000. SE tax rates: 12.4% SS + 2.9% Medicare + 0.9% Additional Medicare above thresholds. QBI phase-out: $198,800 (single) / $398,000 (MFJ).
Understanding S-Corp vs LLC Tax Treatment
The choice between operating as an LLC (Limited Liability Company) or electing S-Corporation status is one of the most consequential decisions a small business owner can make. Both structures provide personal liability protection, separating your personal assets from business debts and obligations. However, the tax treatment of each structure is fundamentally different and can result in thousands of dollars of difference in annual tax liability.
An LLC is the default pass-through entity. All net business profit flows through to your personal tax return and is subject to self-employment tax — the combination of Social Security (12.4% up to the wage base of ~$180,000 in 2026) and Medicare (2.9% with an additional 0.9% for high earners). This means the entire net profit of your business is subject to SE tax, which can be a significant burden as your business grows. The SE tax is in addition to regular income tax, though you can deduct 50% of the SE tax as an above-the-line adjustment to income.
An S-Corp, by contrast, is a corporation that has elected pass-through taxation under Subchapter S of the Internal Revenue Code. The key advantage is that only the reasonable salary paid to the owner-employee is subject to payroll taxes (Social Security and Medicare). Any remaining profit can be distributed as distributions (also called dividends or profit distributions) that are NOT subject to self-employment tax. This is the primary mechanism by which S-Corps reduce tax liability — by converting earned income (subject to SE tax) into passive income (not subject to SE tax). However, the IRS requires that the salary be "reasonable" for the services performed, and unreasonably low salaries are a common audit trigger.
The Qualified Business Income (QBI) deduction under Section 199A allows eligible pass-through business owners to deduct up to 20% of their qualified business income from their taxable income. For LLCs, the QBI deduction is calculated on the full net profit. For S-Corps, it's calculated on the net profit after deducting the employer portion of payroll taxes. The deduction is subject to phase-out rules based on taxable income — in 2025/2026, the phase-out begins at $198,800 for single filers and $398,000 for married filing jointly. This makes the QBI deduction a critical factor in the LLC vs S-Corp decision, especially for higher-income business owners.
Beyond taxes, S-Corps face additional administrative requirements. You must file Form 1120-S (an informational corporate return) annually, process payroll and issue W-2 forms, hold and document board meetings, and maintain corporate minutes. The election to become an S-Corp must be made by filing Form 2553 with the IRS — this must be submitted within 75 days of formation or by March 15 of the tax year for which the election takes effect. The additional administrative costs typically range from $500 to $2,000 per year, compared to $100 to $800 for an LLC. These costs must be factored into the decision to ensure the tax savings justify the extra complexity.
S-Corp Tax Savings = LLC Total Tax − S-Corp Total Tax − Additional Admin Cost
A positive value means the S-Corp structure saves you money overall.
Key Tax Rates and Thresholds for 2026
Making an informed decision between an LLC and S-Corp requires understanding the current tax landscape. The following rates and thresholds are based on IRS projections for 2026, incorporating historical trends and inflation adjustments.
Self-Employment and Payroll Tax Rates
Both self-employment tax (LLC) and payroll tax (S-Corp) consist of Social Security and Medicare components. The Social Security portion is 12.4% total (6.2% employee + 6.2% employer for S-Corps, or the full 12.4% for self-employed individuals). The Medicare portion is 2.9% total (1.45% + 1.45%). An Additional Medicare Tax of 0.9% applies to earned income exceeding $200,000 for single filers and $250,000 for married filing jointly — this is employee-side only for S-Corps.
2026 SS Wage Base: ~$180,000
2025 base was $176,100; historically increases ~3-4% annually
QBI Deduction (Section 199A)
The Qualified Business Income deduction allows eligible taxpayers to deduct up to 20% of their qualified business income. For 2025/2026, the phase-out thresholds are approximately $198,800 for single filers and $398,000 for married filing jointly. Above these thresholds, the deduction is limited based on the greater of 50% of W-2 wages paid or 25% of W-2 wages plus 2.5% of the unadjusted basis of qualified property. For service businesses (health, law, accounting, consulting, etc.), the phase-out applies to all QBI above the threshold.
📋 S-Corp Election Deadline
Form 2553 must be filed within 75 days of the entity's formation date or by March 15 of the tax year for which the election is to take effect.
💰 Reasonable Salary Guidelines
The IRS considers factors such as your role, industry benchmarks, experience, and the business's profitability. Typically 50-70% of net profit for service businesses.
📈 S-Corp Savings Sweet Spot
S-Corp tax savings are most pronounced when net profit exceeds $50,000-$60,000 and the salary-to-profit ratio is properly optimized. Below this threshold, the admin costs may outweigh the tax benefits.
⚠️ Audit Risk Factors
Setting salary too low increases audit risk. The IRS has no bright-line test but has successfully challenged S-Corps paying below-market compensation. Document your salary determination process.
Frequently Asked Questions
When does an S-Corp save more money than an LLC?
An S-Corp typically saves money when your net business profit exceeds $50,000–$60,000 annually. Below this threshold, the additional administrative costs of payroll processing, corporate tax returns, and compliance ($500–$2,000/year) may outweigh the SE tax savings. Above $80,000–$100,000, the savings become substantial — often $5,000–$15,000 per year depending on salary level and state taxes. The savings come from reducing self-employment tax on distributions, which are not subject to SE tax in an S-Corp.
What is a reasonable salary for my S-Corp?
The IRS defines reasonable compensation as the amount that would ordinarily be paid for similar services in similar businesses. Factors include your job duties, industry norms, experience level, and the business's gross revenue. For service-based businesses, the salary is typically 50% to 70% of net profit. For capital-intensive businesses, a lower percentage may be justified. There is no fixed formula — you must document your salary determination process. Taking too low a salary ($0 or minimal) is a red flag that frequently triggers IRS audits, and the IRS can reclassify distributions as wages, plus penalties.
How does the QBI deduction affect the LLC vs S-Corp decision?
The QBI deduction under Section 199A allows a 20% deduction on qualified business income. For an LLC, QBI is calculated on the full net profit. For an S-Corp, QBI is calculated on net profit after the employer portion of payroll taxes (7.65% of salary) is deducted. This means the S-Corp's QBI deduction is slightly smaller than the LLC's, which partially offsets the SE tax savings. However, the SE tax savings on distributions typically outweigh this QBI reduction. At higher income levels where QBI phases out, the S-Corp's advantage may be more or less pronounced depending on the W-2 wage limitation — a factor that makes S-Corps particularly attractive for high-income service businesses.
Can I switch from an LLC to an S-Corp during the year?
Yes, you can elect S-Corp status at any time by filing Form 2553 with the IRS. However, the timing matters. If you file within 75 days of forming your LLC, the election can be effective retroactively to the formation date. If you file after 75 days, the election generally takes effect at the beginning of the next tax year (unless you qualify for late election relief). The deadline for an election to be effective for the current tax year is March 15 (for calendar-year entities). You can also make the election to be effective for the following tax year at any time. Consult with a tax professional before making the switch to ensure proper timing and compliance.
What happens if I set my S-Corp salary to $0?
Setting your S-Corp salary to $0 effectively eliminates the purpose of the S-Corp election and creates significant IRS audit risk. All profit would be classified as distributions, which are not subject to payroll tax. However, the IRS requires that owner-employees who perform substantial services for the corporation receive reasonable compensation. If audited, the IRS can reclassify distributions as wages, assess back payroll taxes including the employer and employee portions, plus interest and penalties. Our calculator shows that with $0 salary, the S-Corp provides no payroll tax benefit — the full net profit is still subject to income tax, and the IRS would almost certainly challenge such an arrangement. Always pay yourself a reasonable salary.
⚠️ Important Disclaimer: This S-Corp vs LLC Tax Comparison Calculator is for educational and informational purposes only. While every effort has been made to ensure accuracy using current IRS tax code provisions and 2026 projections, tax laws are subject to change and individual circumstances vary. Results should be verified with a qualified CPA or tax professional before making any business structure decisions. This calculator does not provide legal, tax, or financial advice. Self-employment tax calculations, QBI deduction limits, and state tax treatment may differ based on your specific situation. Always consult a licensed professional for personalized guidance.