Self-employment tax is a 15.3% tax (12.4% Social Security + 2.9% Medicare) that self-employed people pay on 92.35% of their net earnings to fund Social Security and Medicare. For the 2026 tax year, the 12.4% Social Security portion applies only to the first $184,500 of net earnings, while the 2.9% Medicare portion has no cap. You report business profit on Schedule C, figure the tax on Schedule SE, deduct half of it, and pay it in four quarterly installments.
What is self-employment tax?
Self-employment tax is the Social Security and Medicare tax paid by people who work for themselves. The rate is 15.3%, made up of 12.4% for Social Security and 2.9% for Medicare. When you work a regular W-2 job, you and your employer split this cost 7.65% each. When you work for yourself, you pay both halves, which is why the bill feels heavy the first time you see it.
You owe self-employment tax whenever your net earnings from self-employment reach $400 or more in a year. This is separate from, and paid in addition to, your regular federal income tax.
Who has to pay self-employment tax?
You have to pay self-employment tax if you earned $400 or more in net profit from working for yourself. The IRS treats most self-employed people as sole proprietors or independent contractors, and the rule applies whether you turned a hobby into a business or provide services to clients.
This includes freelancers, gig workers, consultants, contractors, single-member LLC owners, and partners in a partnership. If you run a limited liability company, it’s worth understanding how single-member and multi-member LLCs are taxed, because the structure changes how income flows to your personal return but not whether self-employment tax applies.
How is self-employment tax calculated for 2026?
Self-employment tax is calculated on 92.35% of your net profit, not the full amount. The IRS excludes 7.65% first to mirror the employer-half break that W-2 workers receive. Here is the four-step formula for 2026:
- Net profit = gross business income − deductible business expenses (from Schedule C)
- Taxable base = net profit × 92.35%
- Social Security tax = taxable base × 12.4% (on the first $184,500 for 2026)
- Medicare tax = taxable base × 2.9% (no income cap)
Example: A freelancer with $80,000 in net profit multiplies by 92.35% to get $73,880, then applies 15.3% for a self-employment tax of about $11,304. Half of that ($5,652) is deductible.
High earners pay an Additional Medicare Tax of 0.9% on earnings above $200,000 (single) or $250,000 (married filing jointly). Once net earnings pass the $184,500 Social Security ceiling, only the 2.9% Medicare portion continues.
Where do you report self-employment income? Schedule C and Form 1040
You report business profit or loss on Schedule C of Form 1040, and the income is taxable to you personally. This is true even if you leave the money in the business and never withdraw it.
While you must report gross revenue, you’re also allowed to subtract the business expenses you incurred to earn it. If your business runs at a loss, that loss is generally deductible against your other income, subject to the hobby-loss and at-risk rules. Claiming every legitimate write-off is the single biggest lever most owners have, so it pays to know the full range of tax deductions available to small businesses.
What deductions can lower your self-employment tax bill?
Several deductions reduce either your self-employment tax, your income tax, or both:
- Half of your self-employment tax: deducted “above the line,” which lowers your adjusted gross income.
- Self-employed health insurance: you can deduct 100% of your health insurance premiums as an adjustment to income.
- Home office expenses: a percentage of rent, utilities, phone, and internet for the space you use for business.
- Qualified Business Income (QBI) deduction: a 20% deduction on pass-through income, made permanent by the One Big Beautiful Bill Act signed July 4, 2025. It cuts income tax, not self-employment tax.
- Retirement contributions: a SEP-IRA or Solo 401(k) shelters income while building savings.
- S corporation election: for higher earners, electing S corporation status can convert part of your profit into distributions that escape the 15.3% tax, provided you pay yourself a reasonable salary.
What home-based business deductions are self-employed people entitled to?
Self-employed people who work from home can deduct the portion of home costs tied to the space used as an office. Eligible costs include a share of utilities, telephone, internet, insurance, and rent or mortgage interest based on the square footage of your workspace.
You may also qualify if you handle administrative work from home or store inventory there. And if you keep a second office elsewhere, the trips between your home office and that location can become deductible transportation expenses rather than nondeductible commuting. Because most self-employed people work well beyond a 40-hour week, they routinely qualify for more of these write-offs than they realize, and just as routinely miss them.
Do you have to make quarterly estimated tax payments?
Yes. Because no employer withholds tax from your income, you generally must make quarterly estimated tax payments if you expect to owe $1,000 or more for the year. For 2026, the payment deadlines are April 15, June 15, September 15, 2026, and January 15, 2027.
The real danger isn’t the underpayment penalty itself. It’s reaching year-end without enough cash set aside to pay what you owe. To stay penalty-free, use the safe harbor: pay at least 100% of last year’s total tax (110% if your prior-year AGI exceeded $150,000), split into four equal payments.
Why record keeping decides how much you keep
Complete records are what turn legitimate deductions into deductions you can actually defend. Document everything: create a monthly filing system, save every receipt, and log business mileage as it happens rather than reconstructing it in April.
Sloppy books quietly cost self-employed people money every year, so it helps to know the common bookkeeping mistakes that trigger missed deductions and IRS notices. It’s also worth deciding early whether a cash or accrual accounting method fits your business, since that choice affects when income and expenses land on your return.
Let Tax USA handle the complicated part
Your time is better spent growing your business than decoding Schedule SE and estimated-payment worksheets. Tax USA helps sole proprietors, freelancers, and small business owners calculate self-employment tax correctly, capture every deduction, and stay ahead of quarterly deadlines. If you’d rather focus on the work you love, the benefits of having a professional prepare your taxes usually pay for themselves in reduced stress and a lower bill. Contact Tax USA today for a quick review of your situation.
Frequently Asked Questions
What is the self-employment tax rate for 2026?
The self-employment tax rate for 2026 is 15.3%, split into 12.4% for Social Security and 2.9% for Medicare. The 12.4% Social Security portion applies only to the first $184,500 of net earnings, while the 2.9% Medicare portion applies to all net earnings with no cap.
Do I have to pay self-employment tax if I have a full-time job?
Yes. If your net self-employment earnings are $400 or more, you owe self-employment tax even if you also have a W-2 job. However, your W-2 wages use up the Social Security wage base first, so only your remaining room up to $184,500 is subject to the 12.4% Social Security portion.
How much should I set aside for self-employment taxes?
A common rule of thumb is to set aside 25% to 30% of your net self-employment income to cover both self-employment tax and federal income tax. Your exact amount depends on your total income, deductions, and tax bracket, so recalculating each quarter is safer than relying on a flat guess.
Can I deduct half of my self-employment tax?
Yes. You can deduct one-half of your self-employment tax as an above-the-line adjustment on Schedule 1 of Form 1040. For example, if you pay $10,000 in self-employment tax, you deduct $5,000, which lowers your adjusted gross income but not the self-employment tax itself.
When are 2026 quarterly estimated taxes due?
The 2026 quarterly estimated tax deadlines are April 15, June 15, and September 15, 2026, plus January 15, 2027. You generally must pay estimates if you expect to owe $1,000 or more in tax for the year.
How can I legally reduce my self-employment tax?
You can reduce self-employment tax by maximizing deductible business expenses, contributing to a SEP-IRA or Solo 401(k), deducting your health insurance premiums, and, for higher earners, electing S corporation status to convert some profit into distributions. The 20% QBI deduction also lowers your income tax, though not the self-employment tax itself.