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1099 Tax Calculator
Combines TY2026 Schedule SE self-employment tax with ordinary income tax after deductible half SE tax and the standard deduction. Educational only.
Limitation: Educational estimate for U.S.
How to Estimate 1099 Tax
Start from net profit after expenses.
Choose filing status.
Plan quarterly payments
Feed the combined tax into the Quarterly Estimated Tax Calculator after subtracting withholding.
What the 1099 Result Means
Combined federal SE tax and ordinary income tax for one profit scenario.
1099 Tax Examples
Single contractor, $80k profit
Scenario inputs
Combined tax
Applies 92.35% SE base and standard deduction.
Wage base already used
Scenario inputs
Combined tax
OASDI wage base already filled by W-2 wages.
Zero profit
Scenario inputs
Combined tax
No SE or income tax from 1099 profit.
Educational estimate
Keep separate books for expenses before entering net profit.
Frequently Asked Questions
Still have questions about this calculation?
Try the Calculator1099 Combined Tax Formulas
Schedule SE mechanics plus ordinary income tax.
Formula
SE tax
netEarnings = profit × 92.35%; SE rates 12.4% + 2.9% (+0.9% Additional Medicare when applicable)
AGI bridge
AGI ≈ profit − deductible half of SE tax (+ other adjustments)
Income tax
ordinaryTax(max(0, AGI − deduction))
Scientific Background
Assumptions: single trade/business profit; standard deduction unless overridden; no QBI deduction modeled. Limitations: health-insurance SE deduction, retirement contributions, and multi-state rules omitted. Sources: https://www.irs.gov/businesses/small-businesses-self-employed/self-employment-tax-social-security-and-medicare-taxes ; https://www.irs.gov/pub/irs-drop/rp-25-32.pdf
Sources & review
1099 Tax Calculator documents the references behind its formulas and assumptions. Always treat results as educational estimates, not personalized professional advice.
Last reviewed
July 22, 2026
IRS digital assets / tax reference
Internal Revenue Service (IRS)
https://www.irs.gov/businesses/small-businesses-self-employed/self-employment-tax-social-security-and-medicare-taxesIRS digital assets / tax reference
Internal Revenue Service (IRS)
https://www.irs.gov/pub/irs-drop/rp-25-32.pdfFree Calculator Hub methodology
Free Calculator Hub
/methodology
See our methodology and corrections policy.