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2026 Statutory Rates Primary Source Verified Always 100% Free

Self-Employment Tax Calculator

Estimate your 2026 self-employment tax (Schedule SE) on 1099 freelance or small business profit, accounting for the 92.35% NESE factor, Social Security wage caps ($184,500), and quarterly vouchers.

Quick Answer: Self-employment tax in 2026 is 15.3% on Net Earnings from Self-Employment (NESE), which equals 92.35% of your net 1099 profit. The 15.3% rate consists of 12.4% for Social Security (capped at the 2026 wage base of $184,500 across combined W-2 and 1099 earnings) and 2.9% for Medicare (uncapped, plus a 0.9% surtax for single earners above $200,000 or couples above $250,000). You are entitled to an above-the-line deduction for 50% of your self-employment tax when calculating federal adjusted gross income. For example, a sole proprietor with $100,000 in net profit pays $14,129.55 in self-employment tax ($3,532.39 per quarter) and deducts $7,064.78 from their taxable income.

1099 Profit & Income Profile
Gross 1099 revenue minus business expenses
$
Reduces the $184,500 Social Security cap
$
Determines standard deduction & Medicare thresholds
Includes half-SE deduction and progressive 2026 IRS tax brackets.
Total Self-Employment Tax
$14,129.55
$3,532.39 per quarter (Form 1040-ES)
Net 1099 Profit $100,000.00
Taxable NESE (92.35%) $92,350.00
Social Security Tax (12.4%) $11,451.40
Medicare Tax (2.9%) $2,678.15
Total Self-Employment Tax $14,129.55
50% Above-the-Line Deduction −$7,064.78
Estimated Federal Income Tax $11,615.75
Combined Federal Taxes $25,745.30
Effective Total Tax Rate 25.75%
Primary Source Verified Last reviewed: October 2026

Calculation Methodology: Self-Employment Tax Calculator

Mathematical Formula

SE Tax = (12.4% × min(NESE, max(0, $184,500 - W2))) + (2.9% × NESE) + (0.9% × Excess NESE over Threshold)

1. Net Earnings from Self-Employment (NESE): Schedule SE Line 4: Net Profit × 92.35% (0.9235).
2. Social Security Tax (12.4%): 12.4% on NESE up to the 2026 wage base ($184,500) minus any W-2 wages already taxed.
3. Medicare Tax (2.9%): 2.9% on all NESE without an earnings ceiling.
4. Additional Medicare Tax (0.9%): 0.9% on self-employment earnings where combined (W-2 + NESE) exceeds $200,000 ($250,000 MFJ).
5. Above-the-Line Deduction: Schedule 1 Line 15 allows 50% of your total self-employment tax to be deducted from gross income before calculating federal income tax.
6. Quarterly Vouchers: Total annual SE tax divided into 4 equal quarterly estimated payments (Form 1040-ES).

Schedule SE Methodology & Statutory Rules

  • 92.35% Factor: Under IRC Section 1402(a)(12), self-employed individuals calculate SE tax on 92.35% of net profit, ensuring tax parity with W-2 employees whose employers pay the other half of FICA pre-tax.
  • W-2 Integration: If you have both W-2 job wages and 1099 freelance earnings, W-2 earnings take priority against the $184,500 Social Security wage cap. If your W-2 wages reach $184,500, your 1099 profit is completely exempt from the 12.4% Social Security portion, paying only 2.9% Medicare.
  • Qualified Business Income (QBI): The optional federal income tax estimate uses 2026 progressive brackets and standard deductions. It does not factor in state taxes, local taxes, or Section 199A QBI deductions, which depend on business type and taxable income limits.

Disclaimer: This calculator provides an educational estimate for financial planning purposes and does not constitute official tax advice. Consult a licensed CPA or EA to determine your business deductions, depreciation, and estimated payment safe harbors.

Verified Worked Example (Benchmark)

Primary Statutory Verification Benchmarks (TY2026 Schedule SE):

Benchmark A (Sole Proprietor, $100,000 Net 1099 Profit, $0 W-2 Wages, Single):
NESE: $100,000.00 × 92.35% = $92,350.00.
Social Security (12.4% on $92,350.00, below $184,500 cap): $11,451.40.
Medicare (2.9% on $92,350.00): $2,678.15.
Additional Medicare (0.9%): $0.00 (below $200,000 threshold).
Total Self-Employment Tax: $14,129.55 (Quarterly voucher: $3,532.39).
Half-SE Above-the-Line Deduction: $7,064.78.
Estimated Federal Income Tax (Single, $16,100 Standard Deduction on $92,935.22 AGI): $11,615.75.
Combined Federal Tax Liability: $14,129.55 + $11,615.75 = $25,745.30 (25.75% effective rate).
Benchmark B (Dual Income, $150,000 1099 Profit + $80,000 W-2 Salary, Single):
NESE: $150,000.00 × 92.35% = $138,525.00.
Remaining SS Wage Base: $184,500.00 − $80,000.00 = $104,500.00.
Social Security: 12.4% × $104,500.00 = $12,958.00 (Saves $4,219.10 due to W-2 cap).
Medicare: 2.9% × $138,525.00 = $4,017.23.
Additional Medicare: Combined ($80k + $138,525 = $218,525) exceeds $200k by $18,525 → 0.9% × $18,525 = $166.73.
Total Self-Employment Tax: $17,141.96 (Quarterly voucher: $4,285.49).
Half-SE Deduction: ($12,958.00 + $4,017.23) ÷ 2 = $8,487.62.
Estimated Federal Income Tax: $42,187.96.
Combined Federal Tax: $59,329.92.
Benchmark C (Freelancer, $40,000 Net 1099 Profit, $0 W-2 Wages, Single):
NESE: $40,000.00 × 92.35% = $36,940.00.
Social Security: 12.4% × $36,940.00 = $4,580.56.
Medicare: 2.9% × $36,940.00 = $1,071.26.
Total Self-Employment Tax: $5,651.82 (Quarterly voucher: $1,412.96; Effective SE rate: 14.13%).
Half-SE Deduction: $2,825.91.
Estimated Federal Income Tax: $2,280.89.
Combined Federal Tax: $7,932.71 (19.83% effective rate).

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