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Sole Proprietor Tax Calculator (2025)

Calculate your sole proprietor taxes including Schedule C expenses, self-employment tax, QBI deduction, and quarterly estimated payments.

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Total Federal Tax

$24,284

23.13%

Effective Rate

Net Business Income

$105,000

SE Tax

$14,836

Income Tax

$9,448

QBI Deduction

$16,516

Quarterly Estimate

$6,072

Summary

On $120,000 gross revenue with $15,000 in expenses, your total federal tax is $24,284 (23.13% effective rate).

The QBI deduction saves you $16,516 by excluding 20% of your qualified business income from taxation. This is an additional deduction beyond the standard deduction.

Your deductible business expenses of $15,000 reduce your net income from $120,000 to $105,000, saving on both income tax and SE tax.

Your total federal tax of $24,284 includes $14,836 in SE tax (15.3%) and $9,448 in income tax.

Your estimated quarterly payment is $6,072. Make these payments by April 15, June 15, September 15, and January 15 to avoid underpayment penalties.

Income Tax: $9,448
SE Tax: $14,836

Tax Calculation Journey

10 rows

StepAmount
Gross Revenue$120,000
Total Expenses-$15,000
Net Business Income$105,000
Self-Employment Tax$14,836
Above-Line Deductions-$7,418
AGI$97,582
QBI Deduction-$16,516
Taxable Income$66,066
Income Tax$9,448
Total Federal Tax$24,284

Estimate based on federal taxes only. QBI deduction uses simplified calculation. Does not include state taxes, additional credits, or SSTB phase-out rules. Not tax advice.

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