HW & Associates CPA, PLLC
Free Tax Tool

Self-Employment Tax Calculator

Estimate potential self-employment tax and see how it may affect your federal tax planning.

Free educational calculator • No signup required • Calculator inputs stay in your browser

Your Self-Employment Details

Net profit generally means business income after ordinary and necessary business expenses, before personal income taxes.

Generally Form W-2, Box 3. These wages reduce the Social Security wage base still available for self-employment income.

Enter additional net self-employment income not already included above. Enter $0 if none.

Generally included on Form 1040, Line 26. Enter $0 if none.

Optional. If selected, the calculator shows an illustrative federal income-tax figure only. It is not a tax return calculation.

For general educational use only. Do not enter Social Security numbers, bank information, payment information, tax documents, or other sensitive personal information.

Your Estimate

Enter your details and select Calculate My Estimate. Results appear here and stay in your browser.

Where Do I Find These Numbers?(show)
  • Net profit: Generally estimated from Schedule C business income less business expenses.
  • W-2 Social Security wages: Generally Form W-2, Box 3.
  • Federal estimated tax payments: Generally included on Form 1040, Line 26.

Official IRS Sources

Tax-year settings last reviewed: August 11, 2026.

Educational use only. This calculator provides a simplified, general estimate based solely on the information entered and the selected tax-year settings. It is not tax, legal, accounting, financial, or investment advice, is not IRS-approved, and does not guarantee any tax savings or the avoidance of any tax, interest, or penalty.

This calculator is a simplified educational estimator. It may not account for the Additional Medicare Tax, multiple businesses, church employee income, optional methods, foreign income, qualified business income deductions, credits, deductions, or all federal and state tax rules.

Use of this calculator or website does not create a CPA-client, accountant-client, attorney-client, fiduciary, or other professional relationship with HW & Associates CPA PLLC. A professional relationship begins only when HW & Associates CPA PLLC accepts an engagement and the parties execute an applicable engagement agreement.

Do not enter Social Security numbers, employer identification numbers, bank-account details, payment-card information, IRS identity-protection PINs, tax returns, or other sensitive information. Calculator inputs and results are processed locally in the visitor's browser and are not intentionally saved or transmitted by this calculator.