If you earn money from freelancing, consulting, creator work, gig work, online selling, contract work, or a side business, your tax bill may be larger than you expect.
The surprise is often self-employment tax.
Self-employment tax is separate from federal income tax. It generally covers Social Security and Medicare taxes for people who work for themselves. When you are an employee, Social Security and Medicare taxes are withheld from your paycheck, and your employer also pays a matching portion. When you are self-employed, you may be responsible for the self-employed version of those taxes.
That is why 1099 income can feel more expensive at tax time than many people expect.
The IRS says the self-employment tax rate is 15.3%, made up of 12.4% for Social Security and 2.9% for Medicare. The IRS also says you usually must pay self-employment tax if you had net earnings from self-employment of $400 or more. The IRS self-employment tax page provides more detail.
Start with our Business Setup and Tax Basics hub if you are setting up a side business or freelance activity.
Quick answer
Self-employment tax is the Social Security and Medicare tax that applies to many people who work for themselves.
You may owe self-employment tax if you have net earnings from self-employment of $400 or more. That can include income from freelance work, consulting, contract work, creator income, gig work, or a sole-proprietor side business, depending on the facts.
Self-employment tax is not the same as income tax. You may owe both.
| Question | Short answer |
|---|---|
| Is self-employment tax the same as income tax? | No |
| What does self-employment tax cover? | Social Security and Medicare |
| What is the self-employment tax rate? | Generally 15.3% |
| Who usually owes it? | People with net earnings from self-employment of $400 or more |
| Does an LLC automatically eliminate it? | No |
| Do estimated taxes include self-employment tax? | Yes, estimated payments can cover income tax and self-employment tax |
| What IRS form calculates it? | Schedule SE |
| Can W-2 withholding help cover it? | Possibly, if enough tax is withheld |
What is self-employment tax?
Self-employment tax is a federal tax for Social Security and Medicare.
The IRS says the self-employment tax rate is 15.3%. That includes:
- 12.4% for Social Security
- 2.9% for Medicare
The Social Security portion applies only up to the annual Social Security wage base. The Medicare portion does not stop at the Social Security wage base.
The IRS says self-employed individuals generally use Schedule SE to figure Social Security and Medicare taxes.
Self-employment tax vs federal income tax
This is the most important distinction.
Self-employment tax and income tax are separate.
Federal income tax is based on taxable income, deductions, filing status, tax brackets, credits, and other tax rules.
Self-employment tax is generally based on net earnings from self-employment and covers Social Security and Medicare.
That means a freelancer, creator, or side-business owner may owe:
- Federal income tax
- Self-employment tax
- State income tax, depending on the state
- Local tax, depending on location
- Estimated tax penalties if payments were too low or late
This is why a person can be surprised even if their income seems modest. The tax bill may include both ordinary income tax and self-employment tax.
Why W-2 income feels different from 1099 income
When you are a W-2 employee, your paycheck usually has Social Security and Medicare taxes withheld. Your employer also pays the employer share.
When you are self-employed, there may be no withholding at all unless you make estimated tax payments or increase withholding from another job.
That means a 1099 worker may receive the full payment upfront but later owe tax on that income.
A W-2 employee sees payroll taxes as they happen. A self-employed person may feel the tax cost later.
Who usually has to pay self-employment tax?
The IRS says you usually must pay self-employment tax if you had net earnings from self-employment of $400 or more.
This may include:
- Freelancers
- Independent contractors
- Consultants
- Gig workers
- Online creators
- Designers
- Writers
- Coaches
- Tutors
- Musicians
- Etsy sellers
- Online store owners
- Sole proprietors
- Single-member LLC owners with default federal tax treatment
But be careful. Not every payment reported on a form automatically has the same tax treatment. The facts matter.
Many types of freelance, contractor, consulting, creator, and sole-proprietor income may be subject to self-employment tax if they are net earnings from self-employment. The exact treatment depends on the income type and facts.
What are net earnings from self-employment?
Self-employment tax generally applies to net earnings, not gross receipts.
IRS Topic No. 554 says net earnings are generally calculated by subtracting ordinary and necessary trade or business expenses from gross income derived from the trade or business. It also says the amount subject to self-employment tax is generally 92.35% of net earnings from self-employment.
| Example item | Amount |
|---|---|
| Gross freelance income | $20,000 |
| Ordinary and necessary business expenses | $5,000 |
| Net profit before SE tax calculation | $15,000 |
| Amount generally subject to SE tax before wage-base limits | $13,852.50 |
That $13,852.50 is $15,000 multiplied by 92.35%.
This example is simplified and does not include every limitation, deduction, optional method, or special rule.
Why only 92.35% of net earnings is generally subject to self-employment tax
The self-employment tax calculation generally starts with 92.35% of net earnings from self-employment.
This adjustment reflects the employer-equivalent portion of the tax calculation. The IRS uses Schedule SE to apply the calculation.
Do not confuse this with the separate deduction for part of self-employment tax. The IRS says you can deduct the employer-equivalent portion of self-employment tax in figuring adjusted gross income, but that deduction only affects income tax. It does not affect net earnings from self-employment or the self-employment tax itself.
Example | $5,000 of net self-employment income
Suppose someone has $5,000 of net profit from a side business.
| Step | Amount |
|---|---|
| Net profit | $5,000 |
| 92.35% of net profit | $4,617.50 |
| Approximate SE tax at 15.3% | $706.48 |
This is before considering federal income tax, state tax, credits, estimated payments, or other facts.
Example | $25,000 of net self-employment income
| Step | Amount |
|---|---|
| Net profit | $25,000 |
| 92.35% of net profit | $23,087.50 |
| Approximate SE tax at 15.3% | $3,532.39 |
Again, this is only the self-employment tax estimate. It is not the full tax bill.
Example | $75,000 of net self-employment income
| Step | Amount |
|---|---|
| Net profit | $75,000 |
| 92.35% of net profit | $69,262.50 |
| Approximate SE tax at 15.3% | $10,597.16 |
This example assumes the Social Security wage base limit is not reached through other wages or self-employment income. Actual self-employment tax may differ depending on total wages, net earnings, Social Security limits, Additional Medicare Tax, and other facts.
Social Security wage base and Medicare tax
The 12.4% Social Security portion of self-employment tax applies only up to the annual Social Security wage base.
The 2.9% Medicare portion generally applies to all net earnings subject to self-employment tax.
Some higher-income taxpayers may also owe Additional Medicare Tax. That is separate from the basic 15.3% self-employment tax discussion and depends on filing status and income thresholds.
Does an LLC eliminate self-employment tax?
No.
An LLC does not automatically eliminate self-employment tax.
A single-member LLC with default federal tax treatment is generally treated as disregarded from its owner for federal income tax purposes. In practical terms, many single-member LLC owners still report business income and expenses similarly to sole proprietors and may still owe self-employment tax on net earnings. The IRS explains the default treatment of single-member LLCs.
A multi-member LLC is generally treated as a partnership unless it elects another tax classification. Partners may also have self-employment tax issues depending on the facts.
The important point: do not form an LLC assuming self-employment tax disappears. For more LLC context, see Do I Need an LLC for My Side Business?.
What about S corporation treatment?
Some eligible U.S. business owners later consider S corporation treatment as a separate tax election. That may create self-employment tax planning opportunities in the right case, but it comes with payroll, reasonable compensation, extra filings, state issues, and professional compliance.
S corporation treatment is not automatic when someone forms an LLC.
This is a later planning issue, not a beginner shortcut.
Self-employment tax and estimated tax payments
Self-employed individuals often need to think about estimated taxes.
The IRS says individuals, including sole proprietors, partners, and S corporation shareholders, generally use Form 1040-ES to figure estimated tax. The IRS also says estimated tax is used to pay income tax and other taxes, including self-employment tax.
That means quarterly estimated tax payments may need to cover:
- Federal income tax
- Self-employment tax
- Additional taxes, depending on facts
Use these resources:
- Quarterly Taxes for Freelancers and Side Businesses
- 2026 Quarterly Estimated Tax Calculator
- 2026 Estimated Tax Due Dates
- How to Pay 2026 Estimated Taxes Online
- IRS Payment and Tax Bill Help Center
Can W-2 withholding cover self-employment tax?
Possibly.
If you have a W-2 job and a side business, you may be able to increase paycheck withholding to help cover the tax from the side business. That can sometimes reduce or eliminate the need for separate estimated tax payments.
But this depends on:
- W-2 wages
- Current withholding
- Side-business net profit
- Self-employment tax
- Filing status
- Spouse income, if any
- Credits and deductions
- State taxes
Do not assume your W-2 withholding is enough. Run an estimate during the year using the 2026 Federal Income Tax Calculator and the 2026 Quarterly Estimated Tax Calculator.
Self-employment tax for non-U.S. creators
This article mainly focuses on U.S. taxpayers with self-employment income.
Non-U.S. creators, freelancers, and online sellers may have different issues. A U.S. platform does not automatically make all income U.S.-source income, and nonresident aliens may have different sourcing, withholding, treaty, and filing questions.
Use our U.S. Tax Setup for Non-U.S. Creators guide for that topic.
Do you need an EIN?
An EIN is not required just because self-employment tax may apply. An EIN generally identifies a business or entity, while self-employment tax depends on net earnings and the taxpayer’s facts.
For business tax ID basics, see Do I Need an EIN for My Side Business?.
Common mistakes
Mistake 1 | Thinking 1099 income only creates income tax
Freelance or side-business income may also create self-employment tax.
Mistake 2 | Forgetting that self-employment tax is separate from income tax
A person may owe both.
Mistake 3 | Treating gross income as profit
Business expenses may reduce net profit, but only legitimate business expenses count.
Mistake 4 | Assuming an LLC eliminates self-employment tax
It does not.
Mistake 5 | Waiting until tax filing season
Self-employment tax may need to be covered during the year through estimated payments or withholding.
Mistake 6 | Ignoring state taxes
State income tax may also apply, and state rules can differ.
Mistake 7 | Not saving records
Good records support business deductions and help calculate net earnings.
Mistake 8 | Assuming all online income has the same treatment
Creator income, royalties, services, marketplace sales, affiliate income, and platform payments can have different tax issues.
Practical examples
Example 1 | W-2 employee with a small side gig
A W-2 employee earns $3,000 from weekend freelance work and has $500 of business expenses.
Net profit is $2,500. The taxpayer may owe self-employment tax on net earnings from self-employment, plus income tax depending on the full return.
The taxpayer may be able to adjust W-2 withholding or make estimated payments.
Example 2 | Creator earns $20,000 from online work
A creator earns $20,000 and has $4,000 of legitimate business expenses.
Net profit is $16,000. The creator may owe self-employment tax and income tax. If no tax was withheld, quarterly estimated payments may be needed.
Example 3 | Consultant forms a single-member LLC
A consultant forms a single-member LLC but keeps default federal tax treatment.
The LLC may help with contracts, banking, liability separation, and business organization, but it does not automatically eliminate self-employment tax.
Example 4 | Freelancer also has W-2 wages
A freelancer has a full-time job and earns side income. Their W-2 withholding may or may not be enough to cover the extra income tax and self-employment tax.
This person should estimate during the year, not wait until filing season.
Bottom line
Self-employment tax is one of the biggest reasons side-business and 1099 income can create a larger tax bill than expected.
It is separate from federal income tax. It generally covers Social Security and Medicare. The basic rate is 15.3%, and you usually must pay it if you have net earnings from self-employment of $400 or more.
An LLC does not automatically eliminate self-employment tax. Estimated tax payments may need to cover both income tax and self-employment tax. For the payment-timing basics, see Quarterly Taxes for Freelancers and Side Businesses.
If you are earning freelance, creator, consulting, gig, online selling, or side-business income, estimate early. The surprise is much easier to handle before the deadline. If you already owe and cannot pay in full, see How to Pay an IRS Tax Bill If You Cannot Pay in Full.
FAQ
What is self-employment tax?
Self-employment tax is a federal tax for Social Security and Medicare that applies to many people who work for themselves. It is separate from federal income tax.
What is the self-employment tax rate?
The IRS says the self-employment tax rate is 15.3%, made up of 12.4% for Social Security and 2.9% for Medicare.
Who has to pay self-employment tax?
The IRS says you usually must pay self-employment tax if you had net earnings from self-employment of $400 or more.
Is self-employment tax the same as income tax?
No. Self-employment tax is separate from federal income tax. A self-employed person may owe both.
Does 1099 income always mean self-employment tax?
Not always, but many types of freelance, contractor, consulting, creator, and sole-proprietor income may be subject to self-employment tax if they are net earnings from self-employment. The facts matter.
What are net earnings from self-employment?
Net earnings generally start with gross income from the trade or business minus ordinary and necessary business expenses. The amount subject to self-employment tax is generally 92.35% of net earnings from self-employment.
Why is only 92.35% of net earnings generally subject to self-employment tax?
The Schedule SE calculation generally applies self-employment tax to 92.35% of net earnings from self-employment. This is part of how the self-employment tax calculation accounts for the employer-equivalent portion of the tax.
Can I deduct part of self-employment tax?
The IRS says you can deduct the employer-equivalent portion of self-employment tax in figuring adjusted gross income. This deduction affects income tax only and does not reduce net earnings from self-employment or self-employment tax.
Does an LLC eliminate self-employment tax?
No. An LLC does not automatically eliminate self-employment tax. A single-member LLC with default federal tax treatment may still owe self-employment tax on net earnings.
Does an S corporation eliminate self-employment tax?
S corporation treatment is a separate tax election and can create planning opportunities for some eligible U.S. business owners, but it is not automatic and requires payroll, reasonable compensation, filings, and professional compliance. It should not be treated as a beginner shortcut.
Do quarterly estimated taxes include self-employment tax?
Yes. Estimated tax payments may need to cover both income tax and self-employment tax.
Can W-2 withholding cover self-employment tax from a side business?
Possibly. If you have a W-2 job, increasing withholding may help cover tax from side-business income. Whether that is enough depends on your full tax situation.
Do non-U.S. creators owe self-employment tax?
Non-U.S. creators may have different sourcing, withholding, treaty, and filing issues. A U.S. platform does not automatically make all income U.S.-source. This article mainly focuses on U.S. taxpayers. Non-U.S. creators should review dedicated guidance.
What form is used to calculate self-employment tax?
Self-employed individuals generally use Schedule SE with Form 1040 or 1040-SR to calculate self-employment tax.
Official IRS sources
- IRS | Self-Employment Tax
- IRS | Topic No. 554, Self-Employment Tax
- IRS | Self-Employed Individuals Tax Center
- IRS | About Schedule SE
- IRS | Estimated Taxes
- IRS | Publication 334, Tax Guide for Small Business
- IRS | Single Member Limited Liability Companies
- IRS | S Corporations
- IRS | Additional Medicare Tax
This article is for general informational purposes only and is not tax, legal, accounting, business formation, payroll, international tax, or financial advice. Self-employment tax depends on income type, net earnings, business expenses, wages, filing status, tax year, Social Security wage base, Medicare tax rules, entity classification, elections, and other facts. The examples are simplified and are not final tax calculations. Review official IRS guidance and consider speaking with a qualified tax professional before making tax decisions.