Self-Employment & 1099 vs W-2 Tax Calculator 2026
Compare the true payroll-tax cost of being self-employed (1099) versus an employee (W-2). See the SECA vs FICA gap and your estimated after-tax income in seconds.
How to Use This Calculator
- Enter your expected annual self-employment or gross income.
- Select your filing status (Single or Married Filing Jointly).
- Choose your work status: Self-Employed / 1099 or Employee / W-2.
- Review the SECA vs FICA comparison and your estimated after-tax income.
Self-Employment Tax Formula
SECA (1099) = income × 12.4% (SS, up to wage base)
+ income × 2.9% (Medicare)
+ (income − 200k) × 0.9% if high earner
FICA (W-2) = income × 6.2% (SS) + income × 1.45% // employer pays the other halfWhy 1099 Contractors Pay More Payroll Tax
A W-2 employee splits payroll tax with their employer — 7.65% each. A 1099 contractor is both worker and employer, so they pay the full 15.3% SECA. The trade-off is flexibility and the ability to deduct half of SECA, plus ordinary business expenses. For freelancers and gig workers, understanding this gap is the first step to accurate quarterly tax planning.
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Worked Example
A sole proprietor nets $80,000 of self-employment profit. SECA is 15.3%, split as 12.4% Social Security and 2.9% Medicare, but Social Security applies only up to the annual wage base of about $176,100, so the full 15.3% hits the entire $80,000, or $12,240. The taxpayer may deduct one half of SECA ($6,120) as an above-the-line adjustment, lowering adjusted gross income. On top of SECA, the profit is also subject to federal and, where applicable, state income tax. A high earner above $200,000 single or $250,000 married owes an extra 0.9% Medicare. By contrast a W-2 employee pays just 7.65% FICA, with the employer matching it. The calculator shows SECA, the deductible half, and the income tax stacked on top.
Common Mistakes to Avoid
A frequent error is comparing the 15.3% SECA rate to an employee's 7.65% without counting the employer's matching half or the self-employed deduction of one half of SECA. Another mistake is forgetting that SECA sits on top of income tax, so total federal cost is higher than the rate alone suggests. People also miss quarterly estimated payments and owe penalties at filing. The Social Security portion is capped at the wage base, but the Medicare portion and the 0.9% surtax are not. Finally, hobby income is not self-employment income, while gig and freelance work generally is, so classify correctly before estimating.
When to Consult a Tax Professional
Self-employment math is where an advisor earns the fee. Choosing between a sole proprietorship, S-corporation, or LLC changes how SECA applies and whether part of your income can be taken as distributions rather than salary. An accountant can model the payroll-versus-distribution trade-off and set up quarterly payments to avoid penalties. Those with both W-2 and 1099 income need to coordinate withholding and estimates. If you plan to hire employees, buy equipment, or claim the home-office deduction, get personalized help so the estimate reflects your real structure.
Sources & Further Reading
The IRS explains SECA, the deduction of one half, and estimated payments at IRS.gov. The SSA sets the wage base at SSA.gov. The Federation of Tax Administrators covers state treatment at TaxAdmin.org. The calculator's figures follow these rules.
Disclaimer: SaveTaxUS calculators provide estimates only and do not constitute official tax advice. All calculations run locally in your browser — we never upload your income, property, or financial data.
Data source: Rates are based on publicly available 2026 IRS federal brackets and state tax publications. For formal filing, consult a licensed CPA. Last updated: July 2026.