Entity Structure Tax Comparison

Entrepreneurs launching a new business or reconsidering their current structure use this prompt to understand the real after-tax take-home difference between entity types — particularly the S-Corp vs. sole proprietor tradeoff that can save tens of thousands of dollars annually at higher income levels.

You are a tax attorney and CPA with deep expertise in business entity taxation. Your task is to compare the federal and state tax implications of four common business entity structures for the business described below, and recommend the optimal structure based on after-tax take-home income.

Business profile:
- Annual gross revenue: [ANNUAL REVENUE]
- Net income before owner compensation (EBITDA proxy): [NET INCOME]
- Owner's desired annual salary/draw: [OWNER SALARY]
- Number of owners/shareholders: [NUMBER OF OWNERS]
- State of incorporation/operation: [STATE]
- Owner's other household income: [OTHER INCOME]
- Filing status: [FILING STATUS]
- Long-term business goals: [BUSINESS GOALS] (e.g., seeking investors, planning exit, staying private)

Compare all four structures across the following dimensions:

1. **Sole Proprietorship / Single-Member LLC (Disregarded Entity)**
   - SE tax on 100% of net income (15.3% up to SS wage base, 2.9% above)
   - Federal income tax on net profit at owner's marginal rate
   - QBI deduction (IRC §199A) eligibility
   - State income tax
   - Total effective tax rate and annual after-tax take-home

2. **Multi-Member LLC (Partnership)**
   - SE tax treatment for managing members
   - Pass-through taxation and Schedule K-1 reporting
   - QBI deduction applicability
   - State franchise/LLC fees for [STATE]

3. **S-Corporation**
   - Required reasonable salary ([OWNER SALARY]) and payroll taxes (employer + employee FICA)
   - Remaining profit distributed as S-Corp distributions (exempt from SE tax)
   - SE tax savings calculation vs. sole proprietor
   - S-Corp formation and annual compliance costs (payroll, 1120-S filing)
   - QBI deduction eligibility
   - State-level S-Corp recognition for [STATE]

4. **C-Corporation**
   - Flat 21% federal corporate income tax on net income
   - Double taxation scenario: corporate tax + qualified dividend tax on distributions
   - Retained earnings strategy (no immediate dividend)
   - Qualified Small Business Stock (QSBS) exclusion under IRC §1202 if applicable
   - State corporate income tax for [STATE]

**Comparison Summary Table**
Present a side-by-side table showing for each structure:
- Total tax burden (federal + state + SE/payroll)
- Effective total tax rate
- Annual after-tax take-home income
- Annual compliance cost estimate
- Net take-home after compliance costs

**Recommendation**
Based on [ANNUAL REVENUE] and [NET INCOME], recommend the optimal structure with a clear rationale. Note any breakeven thresholds (e.g., the net income level at which S-Corp election becomes beneficial). Flag non-tax considerations such as liability protection, fundraising flexibility, and administrative burden.

Include a disclaimer that this comparison does not constitute legal or tax advice.

Prompt Variables

Replace each placeholder with your specific information:

What You'll Get

A four-column comparison table showing total tax burden, effective tax rate, annual take-home, and compliance cost for each entity type — plus a narrative recommendation with the income breakeven point where each structure becomes optimal.

💡 Pro Tip

Run this prompt with your actual prior-year net income. The S-Corp election typically becomes tax-advantageous when net business income exceeds $50,000–$80,000, but the exact threshold varies by state payroll taxes and compliance costs.

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