If you drive for Uber, deliver for DoorDash, sell on Etsy, or freelance in any capacity, you've probably noticed something: nobody is withholding taxes from your earnings. That single fact is the root of almost every tax surprise gig workers run into. This guide breaks down exactly what self-employment tax is, how it's calculated, and why it ends up being a bigger bill than most people expect.
When you work a regular W-2 job, your employer automatically withholds two specific taxes from every paycheck: Social Security and Medicare. Together these are called FICA taxes, and they total 15.3% of your wages — but you only see half of that, 7.65%, come out of your check. Your employer quietly pays the other half on your behalf.
When you're self-employed — meaning you receive 1099 income instead of a W-2 — there's no employer to split that bill with. You're both the employee and the employer, which means you're on the hook for the full 15.3%. This full amount is what's called self-employment tax, and it's calculated and reported using Schedule SE when you file your annual return.
Self-employment tax isn't one flat tax — it's actually two taxes added together:
| Tax | Rate | Applies to |
|---|---|---|
| Social Security | 12.4% | Net earnings up to $184,500 (2026 wage base) |
| Medicare | 2.9% | All net earnings, no cap |
| Total | 15.3% | — |
The Social Security portion has a cap — once your net self-employment earnings exceed $184,500 in 2026, you stop paying the 12.4% portion on anything above that. Medicare, on the other hand, applies to every dollar with no ceiling. If your net earnings exceed $200,000 (single) or $250,000 (married filing jointly), an additional 0.9% Medicare surtax kicks in on top of the regular 2.9%.
The calculation happens in three steps. It looks more complicated than it is once you see it laid out.
Start with your total self-employment income, then subtract your legitimate business expenses (gas, a portion of your phone bill, supplies, mileage, platform fees, and so on). What's left is your net profit — this is the number that gets taxed, not your gross income.
The IRS doesn't tax your full net profit for self-employment tax purposes. It only taxes 92.35% of it. This adjustment exists because, conceptually, the IRS treats the "employer half" of FICA as something you wouldn't have had to pay if you were an actual employee — so it backs that portion out before applying the tax.
Multiply that 92.35%-adjusted figure by 15.3% (or split it into the 12.4% and 2.9% pieces if you're near the Social Security wage base). That result is your self-employment tax.
That $8,478 is on top of whatever regular federal income tax this person owes on their taxable income. It's easy to see how someone who's only budgeting for income tax gets blindsided.
The IRS lets you deduct half of your self-employment tax from your income when calculating your federal income tax — not as a business write-off, but as an "above the line" adjustment on Schedule 1. In the example above, that's $4,239 deducted from taxable income before income tax brackets are applied. It doesn't make the self-employment tax itself smaller, but it does soften the income tax hit that comes alongside it.
You owe self-employment tax if your net earnings from self-employment are $400 or more for the year. That threshold is intentionally low — even a modest side hustle on DoorDash or Etsy can trigger the requirement to file Schedule SE, even if you also have a full-time W-2 job elsewhere.
Because no one is withholding this tax throughout the year, the IRS expects gig workers to estimate and pay it quarterly — in April, June, September, and the following January. Underpaying enough during the year can trigger a separate underpayment penalty, even if you pay your full balance by the April filing deadline.
Not automatically. A single-member LLC is what the IRS calls a disregarded entity for tax purposes — you still pay self-employment tax on your earnings exactly as if you hadn't formed an LLC at all. An LLC can offer legal liability protection, but on its own it doesn't change your tax treatment. Electing S-corp status can change how self-employment tax applies, but that's a more advanced strategy with its own tradeoffs, not something that happens by simply forming an LLC.
Self-employment tax is based on your net earnings, not on what you personally withdraw. If your business earned $60,000 for the year and you left $20,000 of it sitting in the business bank account, you still owe self-employment tax on the full $60,000 — not just the $40,000 you paid yourself.
Whether or not a platform or client sends you a 1099 form has no bearing on whether the income is taxable. The $400 self-employment tax threshold is based on your actual net earnings, regardless of whether any paperwork was issued. Plenty of people assume that income under their platform's 1099 reporting threshold is somehow tax-free — it isn't.
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Our calculator estimates your self-employment tax, federal income tax, and quarterly payments based on your real income and expenses.
Try the Gig Worker Tax CalculatorSelf-employment tax exists because, as a 1099 worker, there's no employer quietly covering half of your Social Security and Medicare contributions — you cover all 15.3% yourself. Understanding this early, and setting aside money for it throughout the year rather than discovering it at tax time, is the single biggest thing that separates gig workers who feel financially prepared from those who get a painful surprise every April.
This article is for general informational purposes only and does not constitute tax, legal, or financial advice. Tax rules are complex and vary based on individual circumstances. Consult a qualified tax professional or use IRS-approved software before making filing decisions.