Somewhere around your business's second profitable year, a friend or accountant will casually mention "you should probably become an S-Corp." It's genuinely good advice for a lot of people — but only past a certain income level, and only if you're willing to take on the extra paperwork that comes with it. Here's the actual math, not just the rule of thumb.
LLC vs S-Corp: The Core Tax Difference
As a single-member LLC (or sole proprietor), all net business profit passes to your personal return as self-employment income — 100% subject to 15.3% SE tax. As an S-Corp, you split your income into: a reasonable salary (subject to payroll taxes/SE tax) and distributions (not subject to SE tax). The S-Corp saves tax on the distribution portion.
How Much the S-Corp Election Saves
Example: $180,000 net business profit.
As LLC: $180,000 × 15.3% SE tax = $27,540 in SE tax.
As S-Corp with $80,000 salary: $80,000 × 15.3% = $12,240 payroll taxes. Distributions ($100,000): $0 in SE tax. Total payroll tax: $12,240.
Annual savings: $15,300.
| Net Profit | LLC SE Tax | S-Corp (50% salary) | Annual Savings |
|---|---|---|---|
| $60,000 | $9,180 | $6,885 | $2,295 |
| $100,000 | $15,300 | $9,180 | $6,120 |
| $150,000 | $23,000 | $11,475 | $11,525 |
| $200,000 | $29,500 | $12,240 | $17,260 |
The Reasonable Salary Requirement
The IRS requires S-Corp owner-employees to pay themselves a reasonable salary — market-rate compensation for the work they perform in the business. If your business does $150,000 in revenue consulting work, paying yourself $20,000 in salary while taking $130,000 in distributions is unreasonable and an audit red flag. Most tax professionals recommend 40-60% of net profit as the salary benchmark, with documentation of market rates.
💡 The IRS has won numerous cases against S-Corp owners paying unreasonably low salaries. Reasonable salary documentation (BLS wage data, industry surveys) is essential if audited.
A Detail Most Guides Skip: The Social Security Wage Base
The 12.4% Social Security portion of self-employment tax only applies up to the annual wage base — $184,500 for 2026, up from $176,100 in 2025. Net earnings above that are only subject to the 2.9% Medicare portion, not the full 15.3%. This matters most at higher profit levels: if your LLC net profit is well above $184,500, your effective SE tax rate on the excess is already closer to 2.9-3.8%, which slightly narrows the S-Corp advantage compared to a naive flat-15.3% calculation. On top of that, an Additional Medicare Tax of 0.9% kicks in on wages and self-employment income above $200,000 (single) or $250,000 (married filing jointly) — a threshold that, unlike almost everything else in the tax code, is not adjusted for inflation.
When Does S-Corp Make Financial Sense?
S-Corp savings must exceed the additional compliance costs. General guidance: the S-Corp election is typically net positive when net business profit consistently exceeds $40,000-$50,000/year. Below this threshold, compliance costs often exceed savings. Above $80,000+, the savings are clearly substantial. Run the specific numbers annually as income grows.
S-Corp Compliance Costs
S-Corp requirements add annual costs: Payroll processing ($50-$150/month with a payroll service), quarterly payroll tax deposits and filings, Form 1120-S (S-Corp tax return, typically $800-$2,000 to prepare professionally, vs $500-$1,000 for a Schedule C), state filing fees ($50-$800/year depending on state), and registered agent fee ($50-$300/year). Total additional annual cost: approximately $2,500-$5,000.
Quick Checklist
- Calculate S-Corp savings vs LLC for your specific net profit level before electing
- Establish and document your reasonable salary rate with industry wage data
- Use a payroll service (Gusto, ADP) — manual payroll compliance is error-prone
- File Form 2553 within 75 days of formation to elect S-Corp status for the current year
- Review the election annually — S-Corp stops making sense if income drops below threshold
- Work with a CPA who specializes in small business taxation when making this decision
For informational purposes only. Not financial, tax, or legal advice. Consult a qualified professional before making major decisions.