S-Corp vs C-Corp: Tax & Liability Comparison
Compare taxation, self-employment tax savings, shareholder rules, fringe benefits, liability protection, and exit strategy. Find the best structure for your business.
A guide by Taxstra Tax & Accounting — CPA-led tax strategy for business owners
S-Corp vs C-Corp: Quick Snapshot
The essentials in one look
S-Corporation
- Taxation: Pass-through (no entity tax)
- Shareholders: Max 100 (U.S. individuals only)
- SE Tax: Only on W-2 salary (save $2K–$15K/yr)
- Best for: Solo owners, self-employed, $60K+ income
- Cost: $500–$1,500/year (two returns)
C-Corporation
- Taxation: Double taxation (21% + 20%+)
- Shareholders: Unlimited (any type, worldwide)
- SE Tax: N/A (salary subject to payroll tax)
- Best for: Growth, investors, retained profits
- Cost: $300–$1,000/year (one return)
The Bottom Line
S-Corp: Save SE taxes, best for solo owners. C-Corp: Better for growth and outside investors. Most small businesses choose S-Corp.
Taxation: Pass-Through vs Double Taxation
Understanding the tax flow
S-Corporation Taxation (Pass-Through)
Flow: Income generated at S-Corp level, passes through to owner's personal return
Example (Sole Consultant, $150K Net Income):
- • W-2 Salary: $90,000
- • Business Distribution: $60,000
- • Salary taxed as: W-2 wages + payroll tax (15.3%)
- • Distribution taxed as: Owner's personal income tax (24%–37%)
- • Total tax: ~33% (9.3% payroll on salary + 24–37% income)
Tax Paid: Only at personal level (no corporate tax)
C-Corporation Taxation (Double Taxation)
Flow: Corporation pays tax, then shareholders pay tax on dividends
Example ($150K Corporate Profit):
- • Corporate profit: $150,000
- • Corporate tax (21%): –$31,500
- • Remaining profit: $118,500
- • Dividend to owner: $118,500
- • Dividend tax (20%): –$23,700
- • Owner receives: $94,800
- • Total tax: 36.8% (21% + 20%)
Tax Paid: At corporate level (21%) + personal level (20%+)
C-Corp Double Taxation Hurts Withdrawals
If you extract profits as dividends, you pay 37%+ total tax. But if profits stay in the corporation, you defer personal tax (strategic for growth).
S-Corp vs Sole Proprietor Tax Comparison
Sole proprietor: All $150K is self-employment income + income tax = 38–40%. S-Corp: $90K W-2 (15.3% SE) + $60K ordinary income (24%) = 33%. Save ~$7,500/year.
Self-Employment Tax Savings: The S-Corp Advantage
How S-Corps reduce SE tax burden
How S-Corp SE Tax Works
Example: $100K Net Income
| W-2 Salary | $60,000 |
| Distribution | $40,000 |
| SE Tax on $60K salary | $9,180 |
Comparison: Sole Proprietor vs S-Corp
| Income Level | Sole Proprietor SE Tax | S-Corp SE Tax (Reasonable Salary) | Annual Savings |
|---|---|---|---|
| $50,000 | $7,065 | $4,243 | $2,822 |
| $100,000 | $14,130 | $9,180 | $4,950 |
| $150,000 | $21,195 | $12,852 | $8,343 |
| $200,000 | $28,260 | $16,524 | $11,736 |
* Assumes reasonable salary at 60% of income for mid-range estimates
Break-Even: Around $60K Income
Below $60K, S-Corp filing costs ($500–$1,500) exceed SE tax savings. At $60K, savings begin to offset costs. At $100K+, S-Corp becomes very attractive.
The 'Reasonable Salary' Rule
IRS requires S-Corp owners to pay themselves a reasonable W-2 salary for work performed. You cannot pay yourself $20K W-2 and take $130K distribution on $150K income.
Benchmarking Your Salary
Use Bureau of Labor Statistics or industry surveys to document reasonable salary for your role. CPA can help justify salary split to IRS.
Fringe Benefits: Tax Deductions & Advantages
What each entity can deduct
S-Corp Fringe Benefit Limits
- ✓ Health insurance premiums (deductible on personal return)
- ✓ Retirement plan contributions (401k, SEP-IRA)
- ~ Vehicle/mileage (limited for owner-employees)
- ~ Meals and entertainment (50% deduction limit)
- ✗ Cannot fully deduct owner health insurance at corporate level
- ✗ Limited education expense deductions
C-Corp Fringe Benefit Advantages
- ✓ Fully deductible health insurance (for all employees)
- ✓ Fully deductible education and professional development
- ✓ Fully deductible meals and entertainment (with limits)
- ✓ Fully deductible vehicle and mileage
- ✓ Dependent care and childcare deductible
- ✓ All fringe benefits deductible at corporate level
- ✓ Better for employee retention (benefits perceived as tax-free)
Benefit Value Example
C-Corp covers $12K health insurance: 21% corporate tax = $2,520 savings. S-Corp owner deducts personally: 24% tax = $2,880 savings. Marginal difference, but C-Corp slightly better.
S-Corp Workaround: W-2 Salary Strategy
S-Corp owners can bundle health insurance into W-2 compensation, making it deductible at corporate level. Discuss with CPA on tax return preparation.
Liability Protection & Exit Strategy
How each entity handles dissolution and sale
Liability Protection (Both Equal)
Both S-Corp and C-Corp provide liability protection via "corporate veil." Business creditors cannot pursue personal assets.
- ✓ Personal assets protected from business lawsuits
- ✓ Corporate veil maintained if formalities followed
- ✓ Insurance still recommended (professional liability, general liability)
S-Corp Exit (Easier)
- ✓ Can revoke S-Corp election anytime (Form 2553)
- ✓ Revert to sole proprietor or partnerships
- ✓ Sale proceeds taxed once (pass-through)
- ✓ Simpler dissolution process
- ~ Limited appeal to strategic buyers (tax restrictions)
C-Corp Exit (More Valuable)
- ✓ Can be acquired by larger corporations easily
- ✓ Perceived as more formal/professional by buyers
- ✓ Easier to attract venture capital and investors
- ✓ Can structure tax-free reorganization (Section 368)
- ~ Double taxation on exit if not structured carefully
Exit Value Difference
C-Corp valued at $1M by buyer: can structure asset sale as tax-efficient. S-Corp $1M sale: capital gains tax on full amount for owner (higher tax).
Plan Your Exit Early
If you want to build and sell in 5–10 years, C-Corp may be better for tax-efficient exit. If you plan to run solo forever, S-Corp wins on SE tax.
Ongoing Cost & Compliance Requirements
What you need to do and pay annually
S-Corp Compliance
- ✓ Must file federal return (Form 1120-S)
- ✓ Must file owner's individual return (Form 1040)
- ✓ Must run payroll (even if solo owner)
- ✓ Quarterly payroll tax deposits required
- ✓ Annual W-2 for owner
- ✓ State annual filing/franchise tax
- ✓ Minutes and corporate formalities (annual meetings)
C-Corp Compliance
- ✓ Must file federal return (Form 1120)
- ✓ Owner files individual return (dividend reporting only)
- ✓ Must run payroll (W-2 for employees)
- ✓ Quarterly estimated tax payments
- ✓ Annual W-2 for employees
- ✓ State annual filing/corporate tax
- ✓ Minutes and corporate formalities
- ✓ May require annual audit (if public company or certain debt)
| Cost Item | S-Corp | C-Corp |
|---|---|---|
| CPA tax return prep | $500–$1,000 | $300–$800 |
| Payroll service | $30–$100/mo | $30–$100/mo |
| State filing/franchise tax | $50–$300 | $100–$800 |
| Annual total | $1,000–$1,500 | $800–$2,000 |
Compliance Can Be Outsourced
Use Guidepoint, Zen Business, or LegalZoom for annual compliance ($150–$300/year). This frees you to focus on business.
Complete Comparison Matrix
All 15 key factors side-by-side
| Aspect | SCorp | CCorp |
|---|---|---|
| Taxation | Pass-through (no entity tax, owners pay) | Double taxation (entity + shareholder) |
| Owner Tax Rate | Owner's personal rate (10–37%) | 21% corporate + 20% dividend = 37%+ |
| Self-Employment Tax | Only on W-2 salary (~15.3%) | Not applicable |
| Self-Employment Tax Savings | $2,000–$15,000+ per year | None |
| Number of Shareholders | Max 100 U.S. residents only | Unlimited (worldwide) |
| Shareholder Type | Individuals only (U.S.) | Individuals, corporations, nonprofits, foreigners |
| Filing Deadline | March 15 (tax return) | March 15 (or extended) |
| Retained Earnings | Pass-through (must distribute) | Can reinvest tax-efficiently |
| Health Insurance Deduction | Owner pays personally (full deduction) | Fully deductible to corporation |
| Profit Withdrawal Flexibility | Limited (must balance W-2 + distributions) | Flexible (can retain or distribute) |
| State Income Tax | Varies, usually lower | Fixed corporate rate, often higher |
| Annual Compliance Cost | $500–$1,500 (two returns required) | $300–$1,000 (one return, simpler) |
| Liability Protection | Yes (corporate veil) | Yes (corporate veil) |
| Best For | Solo owners, self-employed $60K+ | Growing companies, outside investors |
| Ease of Dissolution | Easy (simple revocation) | More complex (potential tax consequences) |
When to Choose S-Corp vs C-Corp
The decision tree for your business
Choose S-Corp If:
- • You're a solo owner or small team (under 5 people)
- • Self-employment income over $60K
- • You plan to withdraw profits regularly
- • You want to minimize self-employment taxes
- • No plans to raise outside capital
- • You may exit in 5–10 years (simpler exit)
- • All owners are U.S. individuals
Choose C-Corp If:
- • You plan to reinvest profits (not distribute)
- • You want to raise venture capital or outside investors
- • You have foreign investors or non-individual shareholders
- • You value fringe benefit deductions (health, education)
- • You plan a strategic acquisition or IPO
- • You want more formal corporate structure
- • You have 100+ shareholders or complex cap table
Compromise: LLC Taxed as S-Corp
- • LLC structure (flexible ownership, easier to manage)
- • Elect S-Corp taxation on IRS Form 2553
- • Get SE tax savings of S-Corp
- • Keep ownership flexibility of LLC
- • Cost: $500–$1,500/year (same as S-Corp)
- • Popular with small business owners and freelancers
Frequently Asked Questions
Your top questions answered
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