What Is Self-Employment Tax? A Gig Worker’s Guide (2026)
This article is for informational purposes only and is not tax advice — consult a licensed CPA or enrolled agent for your specific situation. Some links below are affiliate links; we may earn a commission at no cost to you, which never affects our picks.
If you’ve ever looked at your gig earnings and wondered why the tax bill is bigger than you expected, self-employment tax is usually the reason. It’s the part of the tax code that catches almost every new 1099 worker off guard — not because it’s complicated, but because no one warned them it existed. Here’s exactly what self-employment tax is, how it’s calculated, and how to legally pay less of it.
What self-employment tax actually is
Self-employment tax is how independent workers pay into Social Security and Medicare — the same programs a regular employee pays into through payroll (FICA) taxes.
Here’s the key difference. When you have a W-2 job, that FICA tax is split: you pay half, and your employer pays the other half. When you’re self-employed, you are both the employee and the employer — so you pay both halves yourself. That’s the whole reason it feels like extra. It’s not a penalty; it’s the employer’s share that you now cover because there’s no employer.
The rate: 15.3%, broken down
Self-employment tax has two parts:
- Social Security: 12.4% — but only on income up to the annual wage base, which is $184,500 for 2026. Earnings above that aren’t subject to the Social Security portion.
- Medicare: 2.9% — on all of your net earnings, with no cap.
Together that’s 15.3%. High earners pay a bit more: an additional 0.9% Medicare tax applies to earnings above $200,000 (single) or $250,000 (married filing jointly).
How it’s calculated
Self-employment tax isn’t charged on your gross income or even your full net profit — it’s charged on 92.35% of your net earnings. (That small reduction exists to mirror the way an employer’s share isn’t counted as taxable wages.) It’s figured on Schedule SE, which your tax software fills out automatically — FreeTaxUSA and other programs handle it from simple questions, so you never touch the form by hand.
The order of operations matters: you calculate self-employment tax on your net profit — that’s your income after deducting business expenses. So every legitimate deduction lowers this tax, which is why tracking them matters so much.
A real example
Say you net $40,000 from gig work this year, after expenses:
- Taxable base: $40,000 × 92.35% = $36,940
- Self-employment tax: $36,940 × 15.3% = about $5,652
That’s on top of any regular income tax you owe. Estimate your own with the Self-Employment Tax Calculator.
Who has to pay it
The threshold is low: if your net self-employment earnings are $400 or more, you owe self-employment tax and must file — whether or not you received a 1099. There’s no “too small to matter” exemption once you cross $400.
The break you do get: deduct half
Here’s the one piece of good news. You get to deduct half of your self-employment tax — the “employer half” — as an above-the-line deduction on your Form 1040. In the example above, that’s roughly $2,826 knocked off your taxable income. Your tax software applies this automatically, but it’s worth knowing it’s there.
Important nuance: this deduction reduces your income tax, not your self-employment tax. It softens the overall bill without changing the 15.3% itself.
How to legally lower your self-employment tax
Two levers actually reduce the self-employment tax itself:
- Claim every business deduction. Because the tax is calculated on your net profit, every mile, fee, and supply you deduct directly shrinks the amount that’s taxed. This is the biggest lever for most gig workers — work from our full gig worker tax deductions list.
- Consider an S-corp election (at higher income). Once your profit is high enough, an LLC taxed as an S-corp lets you split income into a reasonable salary (subject to payroll tax) and distributions (not subject to self-employment tax). The savings only outweigh the added complexity at scale — see Do Gig Workers Need an LLC? and talk to a CPA.
One common misconception worth clearing up: retirement contributions (SEP-IRA, Solo 401(k)) and the self-employed health insurance deduction lower your income tax, but not your self-employment tax. They’re valuable, just not for this particular bill — because self-employment tax is calculated before those deductions come into play.
How you actually pay it
Self-employment tax isn’t withheld from your gig pay, so you pay it yourself throughout the year via quarterly estimated taxes — bundled together with your income tax. If you’ll owe $1,000 or more, paying quarterly avoids a lump-sum shock and an underpayment penalty. See How to Pay Quarterly Estimated Taxes, and when the year ends, How to File Your Taxes as a Gig Worker walks through putting it all on the return.
FAQ (enable FAQ schema in Rank Math — keep answers 40–60 words)
What is self-employment tax?
Self-employment tax is how independent workers pay into Social Security and Medicare. A W-2 employee splits this FICA tax with their employer, but a self-employed person is both employer and employee, so they pay both halves — 15.3% total on 92.35% of net earnings, calculated on Schedule SE.
How much is self-employment tax in 2026?
The rate is 15.3% — 12.4% for Social Security on earnings up to $184,500 in 2026, plus 2.9% for Medicare with no cap. An additional 0.9% Medicare tax applies to earnings above $200,000 (single) or $250,000 (married filing jointly). It’s charged on 92.35% of your net profit.
Do I have to pay self-employment tax on a small side gig?
Yes, if your net self-employment earnings reach $400 or more for the year. That threshold is low and applies whether or not you received a 1099. Below $400 in net earnings, you generally don’t owe self-employment tax, though you may still need to report the income.
Can I reduce my self-employment tax?
Yes, two ways. Claiming every business deduction lowers your net profit, which is what the tax is calculated on. And at higher income, an LLC with an S-corp election can shift some income out of self-employment tax. Retirement and health-insurance deductions cut income tax but not self-employment tax.
Is self-employment tax the same as income tax?
No. Self-employment tax (15.3%) funds Social Security and Medicare and is separate from — and on top of — regular income tax. You pay both on your gig earnings. This is why gig workers often owe more than expected: two taxes apply to the same net profit.