Taxes & Income

Self-Employment Tax Calculator (Schedule SE)

Calculate the 15.3% Self-Employment Tax (Social Security 12.4% + Medicare 2.9%) and the 50% above-the-line tax deduction for 1099 contractors.

What this calculator does

The Self-Employment Tax Calculator (Schedule SE) estimates your result instantly from the values you enter, using standard taxes & income formulas. Calculate the 15.3% Self-Employment Tax (Social Security 12.4% + Medicare 2.9%) and the 50% above-the-line tax deduction for 1099 contractors. Calculations run in your browser, so nothing you type is sent to a server, and the output is an estimate for planning rather than financial advice.

Self-Employment Tax Breakdown

$0.00

Total Self-Employment Tax (15.3%)

  • Taxable SE Earnings (92.35%) $0.00
  • Social Security (12.4%) $0.00
  • Medicare (2.9%) $0.00
$0.00
Above-the-Line Deduction (50%)
0.00%
SE Tax as % of Profit

What This Means

About Self-Employment Tax Calculator (Schedule SE)

The Self-Employment Tax Calculator computes mandatory Schedule SE taxes (12.4% Social Security up to wage cap + 2.9% Medicare) on 92.35% of net freelance/business earnings, plus the 50% employer-equivalent tax deduction.

Formula & Mathematical Calculation

Taxable Self-Employment Earnings = Net Business Profit × 0.9235

Self-Employment Tax (15.3%) = ( Taxable Earnings up to Cap × 12.4% ) + ( Taxable Earnings × 2.9% )

Above-the-Line Tax Deduction = Self-Employment Tax × 0.50

Calculation Example

$60,000 Net Freelance Profit: Taxable Earnings ($55,410) × 15.3% = $8,477.73 Self-Employment Tax (Qualifies for $4,238.87 above-the-line deduction on Form 1040!).

Key Benefits

  • Calculates 15.3% FICA self-employment tax (Social Security + Medicare)
  • Applies IRS 92.35% net earnings multiplier
  • Computes the 50% above-the-line income tax deduction
  • Accounts for Social Security annual wage base cap
  • 100% free tool for sole proprietors and LLCs

How to Use this Calculator

  1. Enter Net Self-Employment / 1099 Profit
    Input gross revenue minus allowable business expenses.
  2. Enter W-2 Wages from Other Jobs (if any)
    Input W-2 wages to check Social Security wage cap overlap.
  3. Calculate SE Tax
    Click Calculate to view self-employment tax liability and deduction.

Assumptions & Limitations

What the calculation assumes

  • Every value you enter is treated as an exact, known amount.
  • Rates and contributions are assumed to stay constant for the whole period unless the form asks for them separately.
  • Results use standard financial formulas and ignore fees, penalties and promotional terms that are not entered above.
  • Inflation, tax changes and market volatility are not modelled unless a field for them is provided.
  • Amounts are unit-agnostic: results are returned in the same currency you enter.

What it does not cover

  • Self-Employment Tax Calculator (Schedule SE) produces estimates for education and planning, not a quote, offer or professional advice.
  • Real-world outcomes differ when fees, taxes, rounding rules or provider-specific terms apply.
  • Local regulations and tax rules vary by country and change over time; verify current rules for your jurisdiction.
  • Figures are only as accurate as the inputs you supply — check them before acting on the result.
  • For decisions with lasting financial impact, confirm the numbers with a qualified professional.

Frequently Asked Questions

W-2 employees split FICA taxes with their employer (7.65% each). Self-employed individuals are both employee and employer, paying the full combined 15.3% tax.

The calculator first multiplies your net profit by 0.9235 to get taxable self-employment earnings. That 92.35% factor accounts for the employer-equivalent half of FICA, so you are not taxed on the full profit figure.

Social Security is 12.4% applied to your taxable earnings up to the Social Security wage cap, while Medicare is 2.9% applied to all of your taxable earnings with no cap. Adding the two portions gives your total SE tax.

Yes. Half of the SE tax is deductible. The tool multiplies your SE tax by 0.5 to show the deductible portion, reflecting that you can write off the employer-equivalent half against your income.

The effective rate is your SE tax divided by your net profit, shown as a percentage. Because only 92.35% of profit is taxed and Social Security stops at the wage cap, this rate can land below the headline 15.3% combined rate.

Free to use, no account needed. Calculations run in your browser, so nothing you type is sent to a server. Results are estimates — how we build and check our calculators.

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