S Corp Tax Calculator

• Pass-through federal income tax

  An S corporation generally does not pay federal income tax at the entity level. Profit passes through to owners and is taxed on the owner’s personal return.

• Salary runs through payroll

  Owner W-2 salary is subject to employee and employer FICA. The corporation pays employer FICA as a business cost in this model.

• Distributions avoid self-employment tax

  Amounts treated as S corporation distributions in this simplified model are not subject to self-employment tax, unlike default sole proprietor net profit.

• Compliance costs reduce net value

  Payroll administration, state compliance, and tax preparation costs you enter reduce estimated S corporation net value in the comparison.

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• Business profit is split

  Owner salary plus estimated distribution equals business profit in this calculator. Distribution equals profit minus the salary you enter.

• More salary means more payroll tax

  Increasing owner salary shifts income from distribution to wages, which generally increases FICA exposure but may change income tax.

• Less salary increases distribution share

  A lower salary leaves more profit as distribution for modeling purposes, which can change self-employment tax savings assumptions.

• Your salary is an assumption

  This tool does not calculate or recommend a salary. It only shows federal tax effects of the salary amount you provide.

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• IRS scrutiny of owner salary

  S corporation owner-employees are generally expected to pay themselves reasonable compensation for services before taking distributions.

• No fixed IRS salary table

  Reasonable compensation depends on duties, industry, profit, and other facts. TaxChecker does not determine whether your entered salary meets IRS standards.

• User-entered salary only

  Enter the W-2 salary you want to model. Review compensation with a CPA or tax attorney before relying on this estimate for entity or payroll decisions.

• Not a compliance determination

  Low or zero salary inputs may produce warnings, but this calculator does not evaluate legal or IRS reasonable compensation compliance.

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• Sole proprietor baseline

  The comparison uses default sole proprietor treatment where net business profit is subject to self-employment tax and federal income tax.

• S corporation path

  The S corporation path applies payroll tax to owner salary, federal income tax on combined pass-through income, and subtracts compliance costs from net value.

• Estimated savings metric

  Estimated savings vs sole proprietor equals sole proprietor net value minus S corporation net value based on your inputs—not a recommendation to elect S status.

• Known exclusions

  State entity taxes, QBI deduction, basis limitations, built-in gains, and legal liability differences are not fully modeled.

Estimates only — not tax advice, legal advice, or financial advice. TaxChecker is not affiliated with the IRS. Consult a qualified tax professional for your situation.

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• What break-even profit means

  Break-even profit is the business profit level where estimated S corporation net value equals estimated sole proprietor net value, holding your entered salary and compliance costs constant.

• Salary held constant

  The search adjusts business profit while keeping owner salary and compliance costs fixed at your inputs.

• May not exist for every scenario

  If S corporation net value stays below sole proprietor value across the search range, no break-even profit is returned.

• Planning estimate only

  Break-even results are simplified federal planning outputs, not a threshold for electing or operating as an S corporation.

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