Estimate US corporate tax, LLC self-employment tax, and small business tax liability. Updated for 2025 tax rates.
This business tax calculator estimates tax liability for different business entity types in the US. The right business structure can significantly impact your total tax burden.
C-Corporations pay a flat 21% federal corporate income tax rate on net profits. Pass-through entities (S-corps, LLCs, partnerships, sole proprietorships) avoid the corporate tax — income flows to owners' personal returns instead. Self-employed individuals also pay 15.3% self-employment tax (Social Security and Medicare) on net earnings.