Everyone says S-Corps save money on taxes. But how much? The real answer depends on your net profit, your reasonable salary, and costs that most online calculators conveniently ignore — employer FICA, payroll service fees, state unemployment tax, and the additional return preparation cost. This article breaks down the actual S-Corp tax savings at three income levels with real numbers, then shows you when the election costs more than it saves.
No hand-waving. Just math.
How the S-Corp Saves Money (The Basics)
As an LLC taxed as a sole proprietorship, your entire net profit is subject to self-employment tax: 15.3% (12.4% Social Security on the first $168,600 of earnings in 2025, plus 2.9% Medicare on all earnings, plus 0.9% Additional Medicare Tax on earnings over $200,000).
An S-Corp splits that profit into salary (subject to payroll taxes) and distributions (not subject to payroll taxes). The savings come from the distribution portion — you avoid the 15.3% SE tax on every dollar paid as distributions rather than salary.
But the S-Corp also creates costs. The employer pays half of FICA on the salary (7.65%), plus payroll processing fees, state unemployment insurance, and a more expensive tax return. The net savings = SE tax avoided on distributions minus all S-Corp-specific costs.
Scenario 1: $100,000 Net Profit
A service-based business owner earning $100K in net profit. We'll assume a reasonable salary of $55,000 — roughly 55% of net profit, appropriate for a hands-on owner-operator.
| Line Item | LLC (Sole Prop) | S-Corp |
|---|---|---|
| Net profit | $100,000 | $100,000 |
| Owner salary | N/A | $55,000 |
| Distributions | N/A | $45,000 |
| Self-employment tax (15.3%) | $14,130 | N/A |
| Employer FICA (7.65% of salary) | N/A | $4,208 |
| Employee FICA (7.65% of salary) | N/A | $4,208 |
| Payroll service fees | $0 | $1,000 |
| Additional tax return cost | $0 | $1,500 |
| State unemployment (SUTA) | $0 | $350 |
| Total tax/compliance cost | $14,130 | $11,266 |
Net S-Corp savings: approximately $2,864 per year.
Note that the employee's share of FICA ($4,208) comes out of the salary — it's not an additional cost. The owner effectively "pays" both halves of FICA on the salary portion, but the distribution portion ($45,000) avoids FICA entirely. The savings grow as the gap between salary and total profit widens.
At $100K net profit, the S-Corp saves approximately $2,800–$5,100 per year depending on the salary level and compliance costs. It's a clear positive, but not transformative. The real payoff comes at higher income levels.
Scenario 2: $250,000 Net Profit
A professional services firm, consulting practice, or e-commerce business generating $250K in net profit. Reasonable salary: $90,000 — reflecting senior-level compensation for the owner's role.
| Line Item | LLC (Sole Prop) | S-Corp |
|---|---|---|
| Net profit | $250,000 | $250,000 |
| Owner salary | N/A | $90,000 |
| Distributions | N/A | $160,000 |
| Self-employment tax | $33,922 | N/A |
| Employer FICA (7.65% of salary) | N/A | $6,885 |
| Employee FICA (7.65% of salary) | N/A | $6,885 |
| Payroll service fees | $0 | $1,200 |
| Additional tax return cost | $0 | $2,000 |
| State unemployment (SUTA) | $0 | $400 |
| Total tax/compliance cost | $33,922 | $17,370 |
Net S-Corp savings: approximately $16,552 per year.
This is where the S-Corp election becomes genuinely impactful. The $160,000 in distributions avoids approximately $24,480 in SE tax. After subtracting the employer FICA, payroll, and filing costs, you keep more than $16,000. Over five years, that's over $80,000 in cumulative savings.
Scenario 3: $500,000 Net Profit
A high-performing business — agency, medical practice, law firm, or tech consultancy. Reasonable salary: $130,000 — reflecting executive-level compensation.
| Line Item | LLC (Sole Prop) | S-Corp |
|---|---|---|
| Net profit | $500,000 | $500,000 |
| Owner salary | N/A | $130,000 |
| Distributions | N/A | $370,000 |
| Self-employment tax | $41,473 | N/A |
| Employer FICA (7.65% of salary) | N/A | $9,945 |
| Employee FICA (7.65% of salary) | N/A | $9,945 |
| Additional Medicare on distributions (0.9% over $200K) | Included above | $0 |
| Payroll service fees | $0 | $1,500 |
| Additional tax return cost | $0 | $2,500 |
| State unemployment (SUTA) | $0 | $500 |
| Total tax/compliance cost | $41,473 | $24,390 |
Net S-Corp savings: approximately $17,083 per year.
Notice something interesting: the savings at $500K aren't dramatically higher than at $250K. That's because Social Security tax (12.4%) caps at $168,600 in wages. Above that level, only the 2.9% Medicare tax (plus 0.9% Additional Medicare Tax above $200K) applies. The marginal SE tax rate drops from 15.3% to 3.8% on income above the Social Security wage base — which reduces the per-dollar benefit of the S-Corp at higher income levels.
The S-Corp savings curve flattens above roughly $250K–$300K in net profit. The biggest percentage benefit is in the $100K–$250K range, where you're avoiding SE tax at the full 15.3% rate on a growing distribution amount. Above the Social Security wage base, the incremental savings per additional dollar of distributions drops to about 3.8%.
Factors That Reduce Your Savings
The scenarios above are simplified. Several real-world factors can shrink the net benefit:
- State income taxes on S-Corp distributions: Some states tax S-Corp distributions differently than SE income. California's 1.5% S-Corp tax, for example, adds a cost the LLC doesn't have.
- Reasonable salary challenges: If the IRS deems your salary too low, they can reclassify distributions as wages — adding payroll tax, penalties, and interest. Setting a defensible salary often means a higher number than you'd prefer.
- Social Security benefit reduction: Lower W-2 wages mean lower Social Security benefits at retirement. For younger business owners, this long-term trade-off may matter.
- Retirement plan contribution basis: Solo 401(k) and SEP IRA contributions are based on W-2 wages in an S-Corp — not total profit. A lower salary can reduce your maximum retirement plan contribution.
- Health insurance premium handling: S-Corp shareholders must include health insurance premiums in their W-2 wages (then deduct on page 1 of their 1040). This adds modest complexity.
When the S-Corp Actually Costs You More
The S-Corp election is a net negative in several situations:
- Net profit below $50K: The $3,000–$5,000 in annual compliance costs exceeds the SE tax savings at this level.
- Highly variable income: If you earn $150K one year and $20K the next, you're carrying payroll and filing costs in the lean year with no offsetting savings.
- You want to maximize retirement contributions: A defined benefit plan bases contributions on W-2 salary. Keeping a lower salary to maximize distributions can cap your retirement deduction below what a sole proprietorship would allow.
- You need investors or complex ownership: S-Corps limit you to 100 shareholders, one class of stock, and no entity or non-resident alien shareholders. Needing to convert later adds cost and complexity.
The Net Benefit Summary
| Net Profit | Reasonable Salary | Gross SE Tax Avoided | S-Corp Costs Added | Net Annual Savings |
|---|---|---|---|---|
| $50,000 | $40,000 | $1,530 | ~$3,500 | -$1,970 |
| $75,000 | $48,000 | $4,131 | ~$4,000 | ~$131 |
| $100,000 | $55,000 | $6,885 | ~$3,800 | ~$3,085 |
| $150,000 | $70,000 | $12,240 | ~$4,200 | ~$8,040 |
| $250,000 | $90,000 | $21,480 | ~$4,600 | ~$16,880 |
| $500,000 | $130,000 | $21,830 | ~$5,000 | ~$16,830 |
Want to see the exact savings for your situation? We'll model your specific income, state, salary, and compliance costs — and tell you whether the S-Corp is worth it right now.
Get Your Free S-Corp Savings Analysis →The Bottom Line
The S-Corp election is one of the most reliable tax savings tools for business owners earning $80K+ in net profit. At $100K, you save roughly $3,000–$5,000 per year. At $250K, you save $15,000–$18,000. The savings plateau above the Social Security wage base, but they never disappear.
The key is running the numbers with all costs included — not just the SE tax you avoid, but the payroll, filing, and compliance costs you add. And the salary must be defensible. If you're ready to evaluate whether the S-Corp makes sense for your business, a free entity structure review is the logical next step.