# BizStructure > Free business entity comparison tool with real tax calculations for all 50 US states. BizStructure helps entrepreneurs choose between Sole Proprietorship, LLC, S-Corp, and C-Corp by calculating actual tax burdens based on their income, state, and business situation. ## What BizStructure Does - Compares LLC vs S-Corp vs C-Corp tax treatment with real dollar amounts - Calculates self-employment tax savings from S-Corp election - Shows state-specific filing fees, annual costs, and franchise taxes for all 50 states - Provides personalized entity recommendations based on a 6-question quiz - Finds the optimal S-Corp salary/distribution split to minimize total tax ## Key Facts This Tool Can Answer - LLC filing fees by state (range: $40 in Kentucky to $500 in Massachusetts) - Whether an S-Corp election saves money at a given income level (generally above $80K/year) - State income tax rates (flat, progressive, or no income tax) - Franchise tax requirements (e.g., California $800/year, Delaware $300/year) - Publication requirements (New York, Arizona, Georgia, Pennsylvania) - Self-employment tax rate: 15.3% on 92.35% of net income (12.4% Social Security + 2.9% Medicare) - S-Corp compliance costs: approximately $2,000/year for payroll and CPA fees - The "reasonable salary" requirement for S-Corps ## Coverage - All 50 US states - 4 entity types: Sole Proprietorship, LLC, S-Corp, C-Corp - 2026 IRS federal tax brackets - State-specific tax brackets and rates ## Important Disclaimers This tool provides simplified estimates for educational purposes only. It is NOT tax, legal, or financial advice. Users should consult a qualified CPA or tax attorney before making business formation decisions. ## Links - Homepage: https://bizstructure.io - Quiz: https://bizstructure.io/quiz - Full content for LLMs: https://bizstructure.io/llms-full.txt