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S SmartTaxCalcs

All Tax Calculators

10 free calculators, updated for the 2026 tax year.

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All Federal Tax (4) State & Local Tax (2) Self-Employment & Business (3) Tax Planning (1)
Self-Employment & Business

1099 vs W-2 Comparison Calculator

Compare take-home pay as a 1099 contractor vs a W-2 employee.

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Estimated Tax Payment Calculator

Compute quarterly estimated tax payments and their due dates.

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Self-Employment Tax Calculator

Work out self-employment tax with the Social Security and Medicare breakdown.

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