Self-Employment Tax 2025: What It Is and How to Calculate It
Self-Employment Tax 2025: What It Is and How to Calculate It
These figures apply to the 2025 tax year — income you earned in 2025 and report when you file in early 2026.
Jordan Lee earned $6,200 on Fiverr in his senior year of college. He filed taxes in March, same as always — imported his W-2 from his campus library job, clicked through the questions, reached the review screen.
$876 extra. Tax software labeled it "self-employment tax."
He read it twice. A student. Part-time freelancer. He called his accountant, who explained it in about ten minutes: when there's no employer, you pay both sides of Social Security and Medicare yourself. The $876 wasn't a glitch. It was his bill.
Jordan's situation reflects what many first-time gig workers discover at tax time. Details are illustrative.
Self-employment tax is 15.3%. That's the number every gig worker needs to know — and it hits before income tax even enters the picture.
If you made $20,000 on DoorDash, Etsy, Fiverr, or any other platform last year, you're looking at roughly $2,800 in self-employment tax alone. Most first-time filers don't see it coming. Here's exactly what it is, how to calculate it, and how to legally reduce it.
What Is Self-Employment Tax?
When you work a regular job, your employer pays half of your Social Security and Medicare taxes. You pay the other half — and it's automatically withheld from your paycheck.
When you're self-employed, there's no employer. So you pay both halves yourself.
That's what self-employment tax is: the combined employer + employee share of Social Security and Medicare taxes.
| Component | Rate |
|---|---|
| Social Security | 12.4% |
| Medicare | 2.9% |
| Total SE Tax | 15.3% |
For 2025, Social Security tax only applies to the first $176,100 of earnings. If you make more than that across all income sources, the 12.4% Social Security portion stops — but the 2.9% Medicare portion continues with no cap.
High earners (over $200,000 single / $250,000 married filing jointly) also pay an additional 0.9% Medicare surtax on the excess. Most gig workers don't hit this threshold.
IRS source: Self-Employment Tax (Social Security and Medicare Taxes)
Who Has to Pay Self-Employment Tax?
You owe SE tax if your net self-employment income is $400 or more for the year. This applies regardless of whether you received a 1099 form.
Common situations that trigger SE tax:
- DoorDash, Uber Eats, Instacart, or any delivery platform
- Etsy, Poshmark, eBay selling (if treated as a business, not hobby)
- Fiverr, Upwork, or any freelance work
- Airbnb or short-term rental income reported on Schedule C
- Any side hustle where you're paid as a contractor (no taxes withheld)
The $400 threshold is net profit — after deductions. If you earned $1,000 but had $650 in deductible mileage and expenses, your net is $350, which falls below the threshold.
How to Calculate Self-Employment Tax: Step by Step
The IRS doesn't apply the 15.3% rate to your full earnings. There's a built-in adjustment that reduces the taxable base slightly.
Step 1: Find your net profit
Net profit = gross self-employment income minus business deductions (mileage, phone, equipment, etc.)
Example: $25,000 DoorDash earnings − $8,000 mileage deduction − $960 phone = $16,040 net profit
Step 2: Multiply by 92.35%
The IRS lets you exclude 7.65% of net profit before calculating SE tax. This offsets the fact that employees don't pay SE tax on their employer's half.
$16,040 × 92.35% = $14,813
Step 3: Multiply by 15.3%
$14,813 × 15.3% = $2,266 SE tax owed
Quick reference table:
| Net Profit | × 92.35% | SE Tax (15.3%) |
|---|---|---|
| $5,000 | $4,618 | $707 |
| $10,000 | $9,235 | $1,413 |
| $15,000 | $13,853 | $2,119 |
| $20,000 | $18,470 | $2,826 |
| $30,000 | $27,705 | $4,239 |
| $50,000 | $46,175 | $7,065 |
The SE Tax Deduction: How to Get Half Back
After calculating your SE tax, you can deduct 50% of it from your gross income. This happens on Schedule 1 of Form 1040, before your taxable income is calculated.
Example: $2,266 SE tax × 50% = $1,133 deduction
This deduction lowers your adjusted gross income (AGI), which reduces your income tax bill. It doesn't reduce SE tax itself — but it partially offsets the burden.
On $20,000 in net DoorDash profit:
- SE Tax: $2,826
- SE Tax deduction: $1,413 off your AGI
- Income tax savings from deduction (at 12% bracket): ~$170
How SE Tax Interacts With Income Tax
SE tax and income tax are two separate calculations. Both apply to your self-employment income.
SE tax is calculated first on Schedule SE. Then your net self-employment profit (minus the 50% SE deduction) gets added to any other income you have and taxed at your regular income tax rate.
Example: Gig worker with $20,000 DoorDash income, no other income, single filer, standard deduction ($15,000):
| Amount | |
|---|---|
| Net profit | $20,000 |
| Minus 50% SE deduction | − $1,413 |
| Minus standard deduction | − $15,000 |
| Taxable income | $3,987 |
| Income tax (10%) | $399 |
| SE tax | $2,826 |
| Total tax owed | $3,225 |
If you also have a W-2 job, your DoorDash income stacks on top of your salary. That can push you into a higher income tax bracket on the DoorDash portion, but SE tax stays the same regardless.
How to Reduce Self-Employment Tax
SE tax is calculated on net profit — so every dollar in legitimate deductions reduces both your income tax and your SE tax bill.
Deductions that reduce SE tax:
| Deduction | Example |
|---|---|
| Mileage ($0.70/mile, 2025) | 10,000 miles = $7,000 off net profit |
| Phone (business %) | 75% of $100/mo = $900/year |
| Home office | $5/sq ft, up to 300 sq ft ($1,500 max) |
| Equipment | Bags, mounts, cameras used for work |
| Health insurance premiums | 100% if no employer plan available |
| SEP-IRA contributions | Up to 25% of net profit (max $70,000) |
The SEP-IRA is especially powerful for freelancers and higher earners. Contributing $5,000 to a SEP-IRA doesn't just reduce income tax — it lowers the net profit that SE tax is calculated on, saving you $5,000 × 15.3% × 92.35% = roughly $706 in SE tax on top of income tax savings.
IRS source: Publication 535 — Business Expenses
Do You Pay SE Tax Every Quarter?
If you expect to owe $1,000 or more in total taxes for the year (SE tax + income tax combined), the IRS expects quarterly estimated payments — not one annual payment at filing.
2024 quarterly deadlines:
| Period | Due Date |
|---|---|
| Jan–Mar | April 15, 2024 |
| Apr–May | June 17, 2024 |
| Jun–Aug | September 16, 2024 |
| Sep–Dec | January 15, 2025 |
A practical approach: set aside 25–30% of every gig payment. When quarterly deadlines arrive, pay what you've set aside.
Jordan started doing exactly that after his first filing — 27% of every Fiverr payment, moved automatically to a savings account he named "Not My Money." If you're on track to owe less than $1,000 total for the year, you can wait until filing.
For more detail on calculating and paying quarterly, see the quarterly estimated taxes guide for gig workers.
How to File: Schedule SE
SE tax is reported on Schedule SE, which you attach to your Form 1040.
- Complete Schedule C first (report income, subtract deductions, find net profit)
- Transfer net profit to Schedule SE
- Schedule SE calculates your SE tax automatically
- The SE tax flows to Form 1040, Schedule 2
- The 50% SE deduction flows to Form 1040, Schedule 1
Most tax software handles this automatically once you enter your 1099-NEC or manually report your income. You don't need to do the math by hand.
Frequently Asked Questions
Is self-employment tax the same as income tax?
No — they're two separate taxes. Self-employment tax (15.3%) covers Social Security and Medicare. Income tax is calculated separately based on your tax bracket. Most gig workers pay both on the same self-employment income.
Do I owe SE tax if I made less than $600?
The threshold for SE tax is $400 in net profit — not $600. The $600 figure is when platforms send a 1099-NEC. Even if you don't receive a 1099, you still owe SE tax if your net profit exceeds $400.
Does SE tax apply if I have a regular job too?
Yes. SE tax applies to self-employment income regardless of other income. Your W-2 wages are subject to FICA (which your employer splits with you), and your 1099 income is subject to SE tax separately. There's no overlap — you pay both on their respective income sources.
Can I avoid SE tax by forming an LLC?
A single-member LLC is a "disregarded entity" by default — it's taxed the same as a sole proprietor. You still pay SE tax. To reduce SE tax through an LLC, you'd need to elect S-Corp status and pay yourself a reasonable salary, which comes with additional complexity and filing requirements. For most gig workers earning under $40,000, the cost of S-Corp compliance outweighs the SE tax savings.
What if I have multiple 1099 gigs?
All net self-employment income from all sources gets combined on Schedule SE. If you made $8,000 on DoorDash and $6,000 on Fiverr, Schedule SE treats it as $14,000 total (minus combined deductions). You don't file separate Schedule SEs for each gig.
Jordan graduated and kept freelancing full-time. His SE tax bill the following year was $1,800 — but this time, the money was already sitting in that savings account. "It's just not a surprise anymore," he says.
Related Guides
- DoorDash Taxes 2024: How Much You Owe and How to File
- Quarterly Estimated Taxes for Gig Workers: How Much and When to Pay
- What Is Schedule C? A Plain-English Guide for Gig Workers
- Gig Worker Tax Deductions: The Complete 2024 List
This article is for informational purposes only and does not constitute tax advice. Tax laws change frequently and vary by state. Consult a qualified tax professional for guidance specific to your situation.
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