When you work for someone else, taxes feel almost invisible. They come out of your paycheck automatically, and you never really have to think about them. But the moment you start working for yourself — whether that is freelancing, consulting, running an online store, or doing gig work — everything changes.
Suddenly, you are responsible for paying not just income tax, but also something called self-employment tax. And if you are not prepared for it, the first tax bill can be a real shock.
Let us walk through exactly what self-employment tax is, how it works, and what you can do to manage it without losing sleep.
What Is Self-Employment Tax?
Self-employment tax is how freelancers, independent contractors, and sole proprietors pay into Social Security and Medicare. When you have a regular job, your employer withholds 7.65% of your wages for these programs and pays another 7.65% on your behalf. Together, that is 15.3%.
When you are self-employed, there is no employer to pick up half the tab. You pay the full 15.3% yourself. That breaks down as:
- 12.4% for Social Security — on net earnings up to $176,100 (the 2025 wage base)
- 2.9% for Medicare — on all net earnings, with no cap
If your net self-employment earnings exceed $200,000 ($250,000 for married filing jointly), you also pay an additional 0.9% Medicare surtax on the amount above that threshold.
This is separate from your income tax. Self-employment tax is on top of whatever federal and state income tax you owe. That is why the total tax burden for self-employed people often catches new freelancers off guard.
Use our self-employment tax calculator to see exactly how much you would owe based on your earnings.
Who Has to Pay Self-Employment Tax?
You owe self-employment tax if you have net self-employment earnings of $400 or more in a year. This includes:
- Freelancers and independent contractors (anyone who receives 1099-NEC forms)
- Sole proprietors of a business
- General partners in a partnership
- Gig workers (Uber, DoorDash, TaskRabbit, etc.)
- People who sell goods or services on their own (Etsy sellers, consultants, tutors, etc.)
If you are not sure whether you count as self-employed or an employee, our contractor vs. employee calculator can help you understand the difference and what it means for your taxes.
How Self-Employment Tax Is Calculated
The calculation is not as straightforward as just multiplying your income by 15.3%. Here is how it actually works:
Step 1: Start with your net self-employment income (total income minus business expenses).
Step 2: Multiply that by 92.35% (or 0.9235). This adjustment exists because the IRS wants to treat you the same as an employee, and employees do not pay FICA on the employer's share. So you only pay SE tax on 92.35% of your net earnings.
Step 3: Apply the 15.3% rate to that adjusted amount (12.4% Social Security + 2.9% Medicare).
Let us run through a quick example. Say your net self-employment income is $80,000:
- $80,000 × 0.9235 = $73,880 (your SE tax base)
- $73,880 × 0.153 = $11,304 (your self-employment tax)
That is $11,304 in self-employment tax alone — before you even get to income tax. It adds up fast.
The Deduction That Helps (A Little)
Here is some good news: you can deduct the employer-equivalent portion of your self-employment tax when calculating your adjusted gross income (AGI). That means you get to deduct half of your SE tax — in our example, that would be $5,652.
This deduction does not reduce your self-employment tax itself. It reduces your income tax by lowering your AGI. Think of it as the IRS acknowledging that if you were an employee, you would not be paying tax on your employer's contribution. It is a partial offset, and it is claimed on Schedule 1 of your Form 1040.
Self-Employment Tax vs. Income Tax: They Are Different Things
This confuses a lot of people, so it is worth being really clear about it. Self-employment tax and income tax are two separate taxes:
- Self-employment tax = Social Security + Medicare (15.3% of 92.35% of net earnings)
- Income tax = federal tax on your taxable income (10% to 37%, depending on your bracket)
You pay both. On $80,000 in net self-employment income, you might owe around $11,304 in SE tax and another $8,000 to $10,000 in federal income tax (depending on your deductions and filing status). That is $19,000 to $21,000 — roughly 25% of your earnings — just in federal taxes.
Add state income tax on top of that (unless you live in a state with no income tax), and you can see why so many freelancers recommend setting aside 25–30% of every dollar you earn.
Our 1099 tax calculator shows you both your self-employment tax and income tax combined, so you can see the full picture.
How to Pay: Quarterly Estimated Taxes
Unlike employees who have taxes withheld from every paycheck, self-employed people are expected to pay estimated taxes four times a year. The IRS calls these "quarterly estimated payments," and they are due on:
- April 15 (for January–March income)
- June 16 (for April–May income)
- September 15 (for June–August income)
- January 15 of the following year (for September–December income)
You use Form 1040-ES to calculate your estimated payments. The general rule is that you should pay at least 100% of last year's total tax liability (110% if your AGI was over $150,000) or 90% of this year's expected tax — whichever is less — to avoid underpayment penalties.
Our quarterly tax calculator makes this easy. Plug in your expected income, and it tells you how much to send each quarter.
Reducing Your Self-Employment Tax
You cannot avoid self-employment tax entirely (unless you stop being self-employed), but there are legitimate ways to reduce it:
Deduct every legitimate business expense. Self-employment tax is based on your net income — that is income minus expenses. The more expenses you can legitimately deduct, the lower your SE tax. Common deductions include office supplies, software, marketing costs, professional development, mileage, and the home office deduction.
Consider forming an S-Corp. If your business earns a significant amount, structuring it as an S-Corporation can save you self-employment tax. As an S-Corp owner, you pay yourself a "reasonable salary" (which is subject to FICA taxes) and take the rest as distributions (which are not subject to SE tax). This strategy typically makes sense when you are consistently earning above $50,000–$60,000 in net profit. Our business entity comparison calculator can help you evaluate whether this might save you money.
Contribute to a retirement account. Contributions to a SEP-IRA, SIMPLE IRA, or solo 401(k) reduce your taxable income (though not your SE tax directly). A SEP-IRA lets you contribute up to 25% of your net self-employment income, which can be a significant tax savings.
Filing Your Taxes as a Self-Employed Person
When tax time comes, you will file these key forms:
- Schedule C (Form 1040): Reports your business income and expenses
- Schedule SE (Form 1040): Calculates your self-employment tax
- Form 1040-ES: Used for making quarterly estimated payments throughout the year
If your self-employment is fairly simple — just you, no employees, no inventory — filing is not as complicated as it might seem. Many tax software programs walk you through it step by step.
The Bottom Line
Self-employment tax is one of those things that nobody warns you about when you start freelancing. The 15.3% rate on top of income tax can take a real bite out of your earnings if you are not prepared. But with the right planning — tracking expenses, making quarterly payments, and considering your business structure — you can keep it manageable.
Take a minute to run your numbers through our self-employment tax calculator and see where you stand. Knowing what you owe before the bill arrives is always better than finding out after.