Tax Center / Calculators / Quarterly Estimates
Quarterly Estimated Tax Helper
For freelancers and the self-employed: estimate self-employment tax plus income tax, then split what's left into four quarterly payments. Results update as you type.
Your income
Schedule C profit — revenue minus business expenses.
Your estimate
Self-employment tax
- SE tax base (92.35% of net SE income)
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- Social Security (12.4%, wage-base capped)
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- Medicare (2.9%, uncapped)
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- Total SE tax
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- Deductible half (above-the-line adjustment)
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Income tax & total
- Adjusted gross income
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- Taxable income (after standard deduction)
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- Estimated income tax
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- Total federal liability
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- Remaining after withholding
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Suggested payment per quarter
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Quarterly due dates
Safe-harbor rules (paying 100%/110% of last year's tax, or 90% of this year's) are not modeled — these are straight estimates. The 0.9% Additional Medicare Tax may apply at higher incomes and is not included. W-2 wages are not netted against the Social Security wage base here.
Your next step
Questions about your results?
Quarterly estimates are where self-employed filers most often overpay or get penalized. Schedule a consultation and we'll set the right number.