If you received a 1099-NEC (or, less commonly, a 1099-MISC) for work you did, you generally owe self-employment tax on that 1099 income once your net profit reaches $400 for the year. The rate is 15.3%, and it covers the Social Security and Medicare contributions a regular employer would otherwise split with you. Because nothing was withheld from your 1099 payments, you’re on the hook for the full amount yourself.
When the $400 Threshold Kicks In
Self-employment tax applies once your net earnings from self-employment hit $400 or more in a calendar year, under 26 U.S.C. ยง 1402.1Office of the Law Revision Counsel. 26 USC 1402 – Definitions Net earnings means your gross business income minus your ordinary and necessary business expenses. Earn $3,000 from a client but spend $2,700 on legitimate business costs, and your $300 net profit falls under the threshold. No self-employment tax is due.
Getting a 1099 in the mail doesn’t itself trigger the tax. What matters is the bottom-line profit after deductions, not the gross figure on the form. It also works the other way around. Starting in 2026, payers only have to issue Form 1099-NEC for payments totaling $2,000 or more, up from the previous $600 threshold.2Internal Revenue Service. Form 1099 NEC and Independent Contractors You could earn $1,500 from a client, never receive a 1099, and still owe self-employment tax because your profit cleared $400. The IRS expects you to report all self-employment income whether or not a form was issued.
How the 15.3% Rate Breaks Down
Self-employment tax has two components, each funding a different program.3Office of the Law Revision Counsel. 26 USC 1401 – Rate of Tax Social Security takes 12.4% and funds retirement, survivors, and disability benefits. For 2026, this portion applies only to the first $184,500 of combined wages and net self-employment income. Once your earnings cross that cap, the 12.4% stops.4Social Security Administration. 2026 Cost-of-Living Adjustment (COLA) Fact Sheet Medicare takes 2.9% and has no income cap, so every dollar of net self-employment earnings is subject to it.
A third layer, the Additional Medicare Tax, adds 0.9% on self-employment income above $200,000 for single filers or $250,000 on a joint return.5Internal Revenue Service. Questions and Answers for the Additional Medicare Tax The combined 15.3% mirrors the payroll taxes that employers and employees split in a traditional job. As a self-employed person, you cover both halves.
Calculating What You Actually Owe
The 15.3% doesn’t run against your gross 1099 income. You get to the taxable figure in two steps.
First, add up all your gross self-employment revenue and subtract your ordinary and necessary business expenses on Schedule C.6Internal Revenue Service. 2025 Instructions for Schedule C (Form 1040) – Profit or Loss From Business Deductible costs include supplies, software subscriptions, advertising, professional fees, vehicle costs tied to your work, and a home office if you use part of your home exclusively and regularly for business. The IRS’s simplified home office method allows $5 per square foot up to 300 square feet, for a maximum $1,500.7Internal Revenue Service. Simplified Option for Home Office Deduction What’s left after expenses is your net profit.
Second, multiply that net profit by 92.35% (0.9235). This adjustment exists because in a regular job, the employer’s half of payroll taxes isn’t treated as part of the employee’s taxable income. Self-employed people get the same break by only being taxed on 92.35% of net profit.8Internal Revenue Service. Topic No. 554, Self-Employment Tax So if Schedule C shows $80,000 in net profit, you multiply by 0.9235 to get $73,880. The 15.3% rate applies to that $73,880.
1099 Income That Isn’t Subject to Self-Employment Tax
Not every payment reported on a 1099 counts. Self-employment tax applies specifically to net earnings from a trade or business you actively carry on.1Office of the Law Revision Counsel. 26 USC 1402 – Definitions Several categories sit outside that definition:
- Rental income reported on 1099-MISC, generally, unless you’re a real estate dealer or provide substantial services to tenants (like running a hotel).
- Interest and dividends reported on 1099-INT or 1099-DIV, which are investment returns rather than trade or business earnings.
- Prizes and awards reported on 1099-MISC, which are subject to regular income tax but typically not self-employment tax.
- Sporadic or one-off activity. Schedule C instructions note that sporadic activity or a hobby doesn’t qualify as a business.6Internal Revenue Service. 2025 Instructions for Schedule C (Form 1040) – Profit or Loss From Business
The dividing line is whether you’re earning through active, ongoing work. If you are, it’s almost certainly subject to self-employment tax. If the income is passive or a single unrelated payment, it usually isn’t.
If You Also Have a W-2 Job
Freelancing on the side while holding a regular job is common, and the two income streams interact in one important way: they share the Social Security wage cap. For 2026, the 12.4% Social Security piece applies only to the first $184,500 of combined W-2 wages and self-employment income.9Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes) If your day job already pays you at or above that cap, you won’t owe the Social Security portion of self-employment tax on any freelance income. The 2.9% Medicare portion still applies to every dollar of net self-employment earnings, because Medicare has no cap.
If combined earnings from multiple W-2 employers push your total Social Security tax withheld past what you actually owe, the excess can be claimed as a credit on your income tax return.10Internal Revenue Service. Topic No. 608, Excess Social Security and RRTA Tax Withheld
Deductions That Lower the Bill
Self-employment tax and federal income tax are separate calculations run on the same underlying earnings. You owe both. Several deductions can shrink one, the other, or in one case, both.
The tax code lets you deduct half of your self-employment tax as an above-the-line adjustment to income.8Internal Revenue Service. Topic No. 554, Self-Employment Tax This doesn’t reduce the self-employment tax itself. It lowers your adjusted gross income, which reduces the income tax you owe.
If you pay for your own medical, dental, or vision insurance and aren’t eligible for coverage through a spouse’s employer plan, you can deduct the full cost of premiums above the line. The coverage has to be established under your business, though the policy can be in your own name.11Internal Revenue Service. Instructions for Form 7206 This deduction reduces income tax but not self-employment tax.
Section 199A lets most self-employed individuals deduct up to 20% of their qualified business income from their taxable income.12Office of the Law Revision Counsel. 26 USC 199A – Qualified Business Income For 2026, the deduction begins to phase out for single filers with taxable income above roughly $201,750 ($403,500 for joint filers), and certain service-based businesses like law, accounting, and consulting face additional restrictions at higher income levels. Again, income tax only.
Retirement contributions can move real money. A SEP IRA allows contributions of up to 25% of net self-employment earnings, with a 2026 cap of $72,000. A solo 401(k) combines an employee deferral of up to $24,500 with an employer profit-sharing contribution, plus an additional $8,000 catch-up if you’re 50 or older ($11,250 if you’re 60 through 63).13Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500 These reduce taxable income for income tax purposes but not self-employment tax.
The only deductions that actually reduce your self-employment tax are the ordinary and necessary business expenses on Schedule C, because they lower net profit before the 15.3% ever gets applied.
Filing and Quarterly Payments
Self-employment tax is reported on Schedule SE, which attaches to your Form 1040.14Internal Revenue Service. 2025 Schedule SE (Form 1040) Schedule SE is where the 92.35% adjustment and 15.3% rate get applied. Your net business income itself goes on Schedule C.
W-2 workers have taxes pulled from each paycheck. You don’t, so the IRS expects you to pay as you go through quarterly estimated payments on Form 1040-ES. For the 2026 tax year:15Internal Revenue Service. Estimated Tax
- April 15, 2026, covering January through March
- June 15, 2026, covering April through May
- September 15, 2026, covering June through August
- January 15, 2027, covering September through December
IRS Direct Pay lets you make payments straight from your bank account.16Internal Revenue Service. Direct Pay With Bank Account Missing quarterly deadlines triggers an underpayment penalty plus interest, even if you settle up by the April filing deadline the following year.17Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty
Safe Harbor Rules
The IRS won’t hit you with an underpayment penalty if you meet any of these conditions:17Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty
- Your total tax balance after subtracting withholding and credits is under $1,000 when you file.
- Your estimated payments and withholding cover at least 90% of the tax shown on your current return.
- You paid at least 100% of your total tax liability from the prior year through estimated payments and withholding.
One catch for higher earners: if your adjusted gross income for the prior year exceeded $150,000 ($75,000 if married filing separately), that 100% threshold becomes 110%. First-year freelancers usually can’t rely on the prior-year rule because there’s no prior-year self-employment tax to use as a baseline. Aiming for the 90%-of-current-year safe harbor is generally the practical choice.