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Self-Employment Tax Calculator
Estimates SE tax on net profit × 92.35% with 12.4% Social Security (wage base aware) and 2.9% Medicare, plus optional Additional Medicare. Educational only.
Limitation: Educational estimate for U.S.
How to Estimate Self-Employment Tax
Enter net profit for one federal scenario.
Select filing status (affects Additional Medicare threshold).
Moved from Small Business roadmap
This canonical page lives in the US Taxes cluster; it is not a separate thin SaaS duplicate.
What SE Tax Results Mean
Total self-employment tax before income-tax interactions. Deductible half excludes Additional Medicare Tax in this model.
Self-Employment Tax Examples
$100,000 net profit, single
Scenario inputs
Primary result
Applies 12.4% and 2.9% to net earnings under the wage base.
Wage base already used by W-2
Scenario inputs
Primary result
Remaining Social Security base is zero.
Educational estimate
Confirm with IRS.gov or a qualified professional before filing or changing payroll elections.
Frequently Asked Questions
Still have questions about this calculation?
Try the CalculatorSchedule SE–Style Formulas
Educational SECA estimate for TY2026.
Formula
Net earnings
netEarnings = netProfit × 0.9235
Social Security
SS = 0.124 × min(netEarnings, 184500 − W2SSWages)
Medicare
Medicare = 0.029 × netEarnings (+ 0.9% Additional above threshold)
Scientific Background
Assumptions: TY2026 rates; simplified Additional Medicare on SE net earnings alone (combined wage/SE stacking nuances simplified). Sources: https://www.irs.gov/businesses/small-businesses-self-employed/self-employment-tax-social-security-and-medicare-taxes and https://www.irs.gov/taxtopics/tc751
Sources & review
Self-Employment 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/taxtopics/tc751Free Calculator Hub methodology
Free Calculator Hub
/methodology
See our methodology and corrections policy.