Self-Employment Tax Calculator (1099) — Freelance Tax
By ToolZoneX Team
•
August 2026
As a 1099 contractor or freelancer, you owe both the employee and employer halves of Social Security and Medicare — 15.3% combined, versus the 7.65% a W-2 employee sees withheld (their employer quietly covers the rest). This calculator estimates your self-employment tax plus a rough income tax figure, so you know what to set aside before the quarterly deadline hits.
How to Use Self-Employment Tax Calculator
1.
Enter your net self-employment profit for the year2.
Add any other W-2 wages, if you also have a day job3.
Select your filing status4.
View your self-employment tax breakdown and an estimated total tax owed
Key Features
- Accurate 92.35% net-earnings adjustment before applying SE tax
- Social Security portion correctly shares the wage base with any W-2 income
- Additional 0.9% Medicare surtax applied at the right threshold
- Shows the "half of SE tax" above-the-line deduction against income tax
When to Use This Tool
•
Setting aside the right percentage of freelance income throughout the year•
Estimating quarterly estimated tax payments before the IRS deadline•
Comparing take-home pay between a W-2 offer and a 1099 contract at the same rate•
Understanding why a side hustle's tax bill feels disproportionately large
Frequently Asked Questions
SE tax applies to net profit, not gross revenue, and only kicks in above $400 of net earnings. Track business expenses carefully — they reduce both income tax and SE tax.
Your W-2 wages count first against the Social Security wage base — if they already exceed it, your self-employment earnings only owe the uncapped 2.9% Medicare portion.
No — it's a simplified estimate using the federal standard deduction and brackets only, and doesn't account for the QBI deduction, retirement contributions, or health insurance premiums that commonly lower this for self-employed filers.
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