Business calculators
Four free calculators for forming and running a US business entity, each built on official sources that are linked and dated on its page.
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LLC cost calculator
What forming an LLC costs in any state, and what it costs every year to keep it.
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Self-employment tax calculator
Social Security and Medicare tax on 1099 and other self-employment income.
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S corp tax calculator
What an S corp election could save in payroll taxes, against the costs to weigh.
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Delaware franchise tax calculator
A Delaware corporation's annual franchise tax by both of the state's methods.
General information, not legal or tax advice. Each calculator lists its assumptions and limits under it; confirm with the state or the IRS before you file.