Small Business Tax Calculator
Estimate quarterly self-employment and federal income tax.
Inputs
$
$
$
$
Results
Total Estimated Tax
$22,287.77
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Federal Income Tax$9,571.17
Self-Employment Tax$12,716.60
Effective Tax Rate24.8%
Quarterly Estimate$5,571.94
Net Business Income$90,000.00
Remaining Tax Due$22,287.77
Figures current as of 2026. Sources: IRS Rev. Proc. 2025-32, SSA 2026 COLA Fact Sheet (Oct 24, 2025)
How to Use This Calculator
- Select your business entity type to apply the correct tax treatment.
- Enter your net business income and any deductible business expenses.
- Input the qualified business income (QBI) deduction percentage if applicable.
- Review the Estimated Self-Employment Tax, Federal Income Tax, and Total Tax Liability.
- Use the Effective Tax Rate output to compare against quarterly estimated payment requirements.
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