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Tax Tools & Calculators

Free calculators built for freelancers, contractors, and self-employed professionals. No sign-up required.

1099 Tax Calculator

Estimate your total federal tax as a freelancer - income tax, self-employment tax, QBI deduction, standard deduction, and effective rate. The complete picture.

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Quarterly Estimated Tax Calculator

Calculate how much to pay each quarter to avoid IRS underpayment penalties. Uses both current-year and safe harbor methods.

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Self-Employment Tax Calculator

Calculate your 2025 self-employment tax - Social Security (12.4%), Medicare (2.9%), and the deductible half. Supports W-2 wage offsets and all filing statuses.

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Home Office Deduction Calculator

Coming soon

Want to automate your tax deductions?

WriteOff automatically tracks expenses, identifies deductions, and generates tax reports.