ClearQuarter
Started earning side income? Let's estimate what that could mean for your federal taxes.
This free tool estimates the federal tax impact of side income on top of a regular job, and a rough federal safe-harbor target. It takes about 2 minutes. Currently supports Single and Married Filing Jointly only.
Privacy: This calculator runs entirely in your browser. There is no backend, no analytics,
and no third-party service on this page — nothing you enter is sent anywhere or stored.
Tell us about your income
Your approximate W-2 wages before withholding.
Use your approximate profit, not your total sales.
Head of Household and Married Filing Separately aren't supported yet — this version only models Single and Married Filing Jointly brackets accurately.
Estimate this from a recent pay stub or year-end withholding projection. Don't include Social Security or Medicare withholding — federal income tax withholding only.
Skip this if you're not sure. Look for the "Total Tax" line on last year's Form 1040.
Only relevant if you filled in the field above — it affects which safe-harbor percentage applies.
Your estimate
This tool provides a general federal-only estimate for educational purposes and is not tax, legal, or financial
advice. It does not account for state taxes, deductions, credits, or unusual tax situations, and currently
supports Single and Married Filing Jointly only. Consult a licensed tax professional for guidance specific to
your situation.