The first tax surprise for most freelancers is not the income tax. It is the self-employment tax. When you were an employee, your boss quietly paid half of your Social Security and Medicare. Go independent, and that half becomes yours. This guide explains what you owe, why, and how to keep it from eating your side income.
What Self-Employment Tax Is
Self-employment (SE) tax is how the government funds Social Security and Medicare for people who work for themselves. The rate is 15.3%:
- 12.4% for Social Security
- 2.9% for Medicare
It is charged on 92.35% of your net self-employment earnings (the IRS lets you deduct the "employer half" before computing the tax). For 2026, the Social Security portion stops once that 92.35% base reaches the wage base of $184,500. The Medicare portion keeps going, and adds an extra 0.9% on earnings above $200,000 (single) or $250,000 (married filing jointly).
Why It Feels Like a 15.3% Surprise
As an employee, you saw 6.2% Social Security and 1.45% Medicare come out of your check, and your employer paid a matching 7.65%. Total: 15.3%, but you only felt half.
As a freelancer, there is no employer. You pay the full 15.3%. On a $50,000 freelance profit, that is about $7,065 in SE tax (15.3% of 92.35% of $50,000). On top of that, you still owe regular income tax on the same profit.
A Worked Example
Say your freelance business nets $50,000 after expenses.
- Taxable base for SE tax: $50,000 x 92.35% = $46,175
- SE tax: $46,175 x 15.3% = $7,065
- Deductible half: $3,532.50 (an above-the-line deduction that lowers your income tax)
So your income tax is computed on roughly $46,467 ($50,000 minus the deductible half), and your SE tax bill is $7,065. Use our SE Tax Calculator to run your own numbers in seconds.
Four Ways to Lower It
1. Deduct legitimate business expenses
Every ordinary and necessary business expense lowers your net earnings, which lowers the base the 15.3% hits. Software, a home office, mileage, equipment, professional services, and continuing education all count. Track them all year.
2. Fund a retirement plan
Contributions to a SEP-IRA, Solo 401(k), or traditional IRA reduce your income tax and, for SEP and Solo 401(k), also reduce the earnings subject to SE tax. A SEP lets you shelter up to 25% of compensation (about 20% of net earnings after the SE tax deduction), a meaningful chunk for high-earning freelancers.
3. Use the Qualified Business Income (QBI) deduction
Most sole proprietors and pass-through businesses get a deduction of up to 20% of qualified business income. It lowers your income tax (not your SE tax directly) but still cuts the overall bill. Phase-outs apply at higher incomes and for specified service trades, so check your situation.
4. Time income and expenses
Because SE tax is annual, shifting a large expense into a high-income year (or deferring income) can lower the base. A $5,000 equipment purchase in December can shave about $765 off your SE tax that year. This is a timing tool, not a way to avoid tax forever.
Pay As You Go: Quarterly Estimates
Employees have tax withheld automatically. Freelancers do not, so the IRS expects quarterly estimated payments (mid-April, June, September, and January). If you skip them, you can owe a penalty at filing even if you pay the full year by April. Our Quarterly Estimated Tax Calculator splits your expected bill into four payments.
A simple rule of thumb: set aside 25% to 30% of every freelance payment in a separate account. That covers income tax plus SE tax for most filers and prevents an ugly April surprise.
Self-Employment vs. a W-2 Job
| Employee (W-2) | Self-Employed | |
|---|---|---|
| Social Security + Medicare paid | 7.65% (employer pays other 7.65%) | 15.3% total |
| Withholding | Automatic | You pay quarterly |
| Deductible half | N/A | Half deducted above the line |
| Extra forms | None beyond W-2 | Schedule C, Schedule SE |
The Bottom Line
Self-employment tax is the 15.3% you pay in place of the employer share, charged on 92.35% of your net earnings. It stacks on top of income tax, so budget for it from your first freelance dollar. Lower it with expenses, retirement contributions, and the QBI deduction, and pay quarterly to avoid penalties. Start with the SE Tax Calculator and the Quarterly Estimated Tax Calculator to plan the year.
Frequently Asked Questions
What is the self-employment tax rate for 2026?
15.3% on 92.35% of net earnings: 12.4% Social Security (capped at the $184,500 wage base) plus 2.9% Medicare, with an extra 0.9% Medicare above $200,000 (single) or $250,000 (joint).
Why do freelancers pay more than employees?
Employees split the 15.3% with their employer. Self-employed workers pay the whole amount but can deduct the employer half above the line, lowering income tax.
Do I owe SE tax on a little side income?
You owe it once net self-employment earnings hit $400 for the year. Below that, you do not, though filing may still help claim credits.
How can I lower my self-employment tax?
Deduct business expenses, contribute to a SEP-IRA or Solo 401(k), use the QBI deduction, and time income and expenses between years.
Calculate your self-employment tax
Enter your 1099 and freelance income to see the 15.3% tax, the deductible half, and your total bill.
Use the SE Tax Calculator