Self-Employment Tax Calculator — SECA, SS & Medicare Breakdown (2026)
Calculate your self-employment (SECA) tax with a full Social Security and Medicare breakdown. Free, instant, and accurate.
Self-Employment Tax
Results below
Enter Values
Social Security Portion (12.4%)
$11,451.40
Medicare Portion (2.9%)
$2,678.15
Effective SE Tax Rate
14.13%
Deductible Half of SE Tax (Form 1040 adjustment)
▲ $7,064.78
Estimated QBI Deduction Savings (income tax)
▲ $4,400.00
Total Combined Income (1099 + W-2)
$100,000.00
Scenario Comparison
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Your Self-Employment Tax
$14,129.55
Effective rate: 14.13% of net profit
SS vs. Medicare Split
Tax Breakdown
12.4% rate · Capped at $176,100 wage base (2026)
2.9% rate · No wage base cap
Deductible Half
$7,064.78
Above-the-line deduction on Form 1040
QBI Savings (Est.)
$4,400.00
20% QBI × 22% assumed marginal rate
How It's Calculated
SE Earnings = Net Profit × 92.35%
Social Security = min(SE Earnings, Remaining Wage Base) × 12.4%
Medicare = SE Earnings × 2.9%
Total SECA Tax = SS Portion + Medicare Portion
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