If you’re a freelancer, gig worker, or independent contractor, you’ve probably noticed that your tax situation looks very different from a traditional employee’s. Instead of having taxes automatically withheld from each paycheck, you’re responsible for calculating and paying them yourself. The most significant — and often most confusing — of these is self-employment tax.
See IRS tax topics.
Read tax savings formula.
Related: Learn about SE tax explained.
This guide walks you through exactly how to calculate what you owe, with real numbers and examples you can apply to your own situation.
What Is Self-Employment Tax?
Self-employment (SE) tax is the equivalent of the Social Security and Medicare taxes that employers and employees split in traditional jobs. When you’re self-employed, you pay both halves — the employee portion (6.2% for Social Security + 1.45% for Medicare = 7.65%) and the employer portion (another 7.65%). That adds up to 15.3% total on your net earnings.
Unlike income tax, which is based on your taxable income after deductions, SE tax is based on your net earnings from self-employment. And unlike income tax, it’s a flat rate — though there’s a cap on the Social Security portion.
Self-Employment Tax Rates for 2026
| Component | Rate | Wage Cap (2026) |
|---|---|---|
| Social Security (employee half) | 6.2% | $176,100 |
| Social Security (employer half) | 6.2% | $176,100 |
| Medicare (employee half) | 1.45% | No limit |
| Medicare (employer half) | 1.45% | No limit |
| Total SE tax rate | 15.3% | — |
| Additional Medicare (over $200k single) | +0.9% | No limit |
Here’s the key nuance: you only pay the 12.4% Social Security portion on the first $176,100 of your combined net earnings (the wage cap). Above that, only the 2.9% Medicare portion applies. If you earn over $200,000 as a single filer ($250,000 married filing jointly), you also pay an additional 0.9% Medicare surtax.
Step-by-Step: How to Calculate SE Tax
Step 1: Calculate Your Net Earnings
Your net earnings are your total gig income minus allowable business expenses. This is calculated on Schedule C (or Schedule F for farming).
Formula:
Gross Income ? Business Expenses = Net Earnings
For example, if you earned $65,000 in freelancing income and had $8,500 in deductible expenses (software, equipment, home office), your net earnings would be $56,500.
Step 2: Apply the 92.35% Rule
Here’s where many people get tripped up. You don’t pay SE tax on 100% of your net earnings. The IRS allows you to multiply your net earnings by 92.35% first. This is meant to account for the fact that employees only pay Social Security/Medicare on their wages (which don’t include the employer’s share), so self-employed folks get a similar adjustment.
Formula:
Net Earnings × 0.9235 = Net Earnings Subject to SE Tax
Using our example: $56,500 × 0.9235 = $52,177.75
Step 3: Apply the 15.3% Rate
Now multiply the result by 15.3%.
Formula:
Net SE Earnings × 15.3% = Self-Employment Tax
$52,177.75 × 0.153 = $7,983.20
But remember — only the first $176,100 of earnings is subject to the Social Security portion. If your net SE earnings exceeded that cap, you’d calculate the Social Security and Medicare portions separately.
Real-World Examples
| Scenario | Gross Income | Expenses | Net Earnings | 92.35% | SE Tax Due |
|---|---|---|---|---|---|
| Part-time freelancer | $18,000 | $2,000 | $16,000 | $14,776 | $2,261 |
| Full-time contractor | $65,000 | $8,500 | $56,500 | $52,178 | $7,983 |
| High-earning consultant | $200,000 | $30,000 | $170,000 | $156,995 | $21,679 |
| Above Social Security cap | $350,000 | $40,000 | $310,000 | $286,285 | $24,518 |
The SE Tax Deduction
Here’s a bright spot: you can deduct half of your SE tax (the “employer half”) as an adjustment to income on Form 1040. This reduces your adjusted gross income, which in turn lowers your income tax bill.
In our $56,500 example with $7,983 in SE tax, you can deduct $3,991.50. This doesn’t reduce your SE tax itself, but it does reduce your income tax — effectively cutting the effective cost of the employer half.
Filing Forms You’ll Need
- Schedule C (Form 1040) — Profit or Loss from Business: reports your income and expenses
- Schedule SE (Form 1040) — Self-Employment Tax: calculates the actual tax due
- Form 1040-ES — Estimated Tax for Individuals: used to make quarterly payments
- Schedule 1 (Form 1040) — Additional Income and Adjustments to Income: reports the SE tax deduction
Quarterly Payment Strategy
The IRS expects you to pay SE tax (and income tax) throughout the year via quarterly estimated payments. If you don’t, you could face underpayment penalties.
Here’s a simple strategy: each time you receive a payment, immediately move 30% to a separate tax savings account. For SE tax specifically, remember that 15.3% of your net is going to SE tax — plus whatever your income tax bracket is.
Quarterly Due Dates (2026)
- Q1: April 15, 2026 (Jan–Mar earnings)
- Q2: June 15, 2026 (Apr–May earnings)
- Q3: September 15, 2026 (Jun–Aug earnings)
- Q4: January 15, 2027 (Sep–Dec earnings)
Common Mistakes to Avoid
- Forgetting SE tax entirely: Many new freelancers calculate income tax but forget they owe SE tax too. That 15.3% adds up fast.
- Net vs. gross confusion: SE tax is on net earnings (after expenses), not gross income. Don’t overpay by using your total revenue.
- Skipping the 92.35% adjustment: The IRS doesn’t advertise this, but it reduces your taxable SE earnings by 7.65%.
- Not tracking expenses: Every legitimate business expense reduces your net earnings and thus your SE tax. Track everything.
Frequently Asked Questions
Q: Do I owe SE tax if my net earnings are under $400?
A: No. You only file Schedule SE if your net earnings from self-employment are $400 or more. Below that, no SE tax is due.
Q: Can I opt out of SE tax?
A: Generally, no. SE tax is mandatory once your net earnings exceed $400. Unlike income tax, there’s no way to legitimately avoid it entirely — though you can minimize it through business deductions.
Q: Does SE tax apply to LLC income?
A: In most cases, yes. Single-member LLCs are treated as sole proprietorships for tax purposes, so the same SE tax rules apply. However, if you elect S-corp taxation, you can potentially reduce SE tax by paying yourself a “reasonable salary” and taking the rest as distributions.
Q: How do I pay SE tax if I also have a W-2 job?
A: If you have a W-2 job, your employer already withholds your half of Social Security and Medicare. Your SE tax only applies to your self-employment earnings, though the Social Security wage cap takes both into account — if your W-2 wages are already over the cap, you won’t owe the Social Security portion of SE tax.
Q: What happens if I underpay my quarterly estimates?
A: The IRS charges an underpayment penalty (currently around 8% per year) on the amount you underpaid. To avoid this, you need to pay at least 90% of your current year’s tax or 100% of your previous year’s tax (110% if your AGI was over $150k) through withholding and estimated payments.
Understanding self-employment tax is one of the most important financial skills for any gig worker. Once you get the hang of the calculation, you can plan ahead, set aside the right amount, and avoid nasty surprises at tax time.
Disclaimer: This content is for informational purposes only and does not constitute financial, tax, or legal advice. Consult a qualified professional for advice tailored to your specific situation.
