Self Employment Tax Calculator
Instantly calculate your 15.3% self-employment tax. Discover exactly how much you owe for Social Security and Medicare based on your net 1099 business income.
How to Use the Self Employment Tax Calculator
Using our self employment tax calculator is simple and requires no registration:
- Calculate your Net Self-Employment Income. This is your total revenue minus all your business write-offs.
- Enter your Net Income into the calculator.
- The calculator will automatically apply the 92.35% IRS adjustment rule.
- It will split your liability into Social Security (12.4%) and Medicare (2.9%), showing you exactly how much FICA tax you owe the government.
Why Use a Self Employment Tax Calculator?
The 15.3% self-employment tax catches millions of new freelancers off guard every year because it is completely separate from standard income tax. This Self Employment Tax Calculator instantly isolates your FICA liability so you know exactly how much of your profit belongs to Social Security and Medicare.
What is the Self-Employment Tax in 2026?
The Self-Employment (SE) tax is often the most painful discovery for new freelancers, gig workers, and small business owners. Unlike the standard Federal Income Tax (which pays for things like the military and highways), the SE tax specifically funds the US Social Security and Medicare systems.
By law, every working American must contribute to these systems. The total contribution rate is 15.3%. Using a self employment tax calculator is crucial because this tax applies to your business profits before any standard or itemized deductions are taken.
How the 15.3% is Split
The 15.3% SE tax is composed of two entirely separate programs. Our SE tax calculator breaks these down for you:
Why W2 Employees Don't Notice It
If you were previously a W2 employee, you might be thinking, "I never paid a 15.3% tax before!" Yes, you did, but it was hidden from you.
In the W2 world, the 15.3% burden is split evenly. The employee pays 7.65% (withheld from their paycheck), and the employer pays the other 7.65% behind the scenes. When you become self-employed, you are legally both the employee and the employer. Therefore, you must pay both halves.
The Silver Lining: The SE Deduction
Because it is unfair that W2 employees get their "employer half" paid for them, the IRS offers a massive deduction to self-employed individuals to level the playing field.
You are allowed to deduct exactly half of your SE tax from your Adjusted Gross Income (AGI). For example, if your SE tax is $10,000, you can deduct $5,000 from your income before calculating your standard Federal Income Tax. This employer equivalent deduction saves self-employed individuals thousands of dollars a year and is automatically factored into advanced tax planning.