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Tax Calculators

Estimate taxes and compare take-home amounts using the jurisdiction, tax year, thresholds, and rules shown by each tool.

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32 available
Estimated Tax

Quarterly Estimated Tax Calculator

Plan 2026 federal estimated payments using annual tax, withholding, and prior-year safe harbors. See installments,…

Easy to use
Retirement Tax

SEP IRA Contribution Calculator

Estimate 2026 SEP IRA contribution capacity from business profit or eligible wages. Apply the correct…

Easy to use
Self Employment Tax

Self-Employment Tax Calculator

Estimate 2026 regular self-employment tax from net profit and your own W-2 wages. See Social…

Easy to use
Retirement Tax

Roth Conversion Calculator

Compare a Roth conversion with keeping traditional funds. Include conversion tax, future tax, growth, and…

Easy to use
Retirement Tax

Solo 401(k) Contribution Calculator

Estimate 2026 solo 401(k) employee, employer, and catch-up contributions. Include other-plan deferrals and the special…

Easy to use
Income & business tax

Australian Bonus Tax Calculator

Estimate the annual marginal tax, Medicare and optional HELP effect of adding a cash bonus…

Easy to use
Withholding & collection

Australian HELP Repayment Calculator

Calculate the 2026-27 compulsory HELP or other study-loan repayment from Australian repayment income using the…

Easy to use
Sales, Zakat & mobile

Australian GST Calculator

Add or remove Australian GST and show the GST-exclusive amount, GST component and GST-inclusive total…

Easy to use

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