Self-Employment Tax Calculator (2026)
Navigating the 1099 landscape requires precision. In 2026, US self-employed professionals must manage Social Security and Medicare contributions independently—essentially paying both the employer and employee share.
Understanding Self-Employment Tax
When you work for a company (W-2), your employer pays half of your Social Security and Medicare taxes, and the other half is withheld from your paycheck. When you are self-employed, you are responsible for the full 15.3%. This is officially known as the Self-Employment (SE) tax.
It is calculated on your net earnings—your total business income minus ordinary and necessary business expenses. For 2026, keeping track of these figures is vital to avoid underpayment penalties from the IRS.
The Formula Used
Step 1: Net Profit × 0.9235 = Taxable Income
Step 2: Taxable Income × 0.153 = Total SE TaxWhy 0.9235? The IRS allows you to calculate SE tax on only 92.35% of your net earnings. This adjustment is meant to simulate the deduction that W-2 employers receive for paying their share of payroll taxes.
Social Security Wage Base in 2026
It's important to note that the 12.4% Social Security portion of the tax only applies to income up to a certain threshold, known as the wage base. In 2026, this threshold is projected to adjust for inflation (typically around $170,000 - $175,000). Once your taxable income exceeds this amount, you only pay the 2.9% Medicare portion on the remaining balance.
Frequently Asked Questions
Who is required to pay self-employment tax?
Generally, you must pay SE tax and file Schedule SE (Form 1040) if your net earnings from self-employment were $400 or more. This applies to freelancers, independent contractors, and members of partnerships.
Does this include federal income tax?
No. The self-employment tax is separate from your federal and state income taxes. SE tax specifically funds your Social Security and Medicare benefits. You will likely owe income tax on top of the amounts calculated here.
SE Tax Calculator
Income after business expenses
Total Estimated SE Tax
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