Calculate self-employment taxes for freelancers and independent contractors. Get your SE tax amount, deductible portion, and total tax impact based on your net self-employment income and filing status.
Enter your annual net profit from self-employment (Schedule C, line 31)
Annual wages from W-2 employment (if applicable)
Used to determine Additional Medicare Tax threshold
Total SE Tax
$0
15.3% × 92.35% of net earnings
Social Security Portion
$0
12.4% of 92.35% of net earnings
Medicare Portion
$0
2.9% of 92.35% of net earnings
Deductible Portion
$0
50% of SE tax (deduct from income)
📋 Detailed Breakdown
Net Self-Employment Income$0
SE Tax Base (92.35% of net income)$0
Social Security Tax (12.4%)$0
Medicare Tax (2.9%)$0
Additional Medicare Tax (if applicable)$0
SE Tax Deduction (50% of SE tax)$0
Total SE Tax Due$0
💡 Tax Impact Summary
Estimated Income Tax Deduction$0
Estimated Annual Tax Savings from Deduction$0
Effective SE Tax Rate0.00%
✅ Calculation completed successfully!
❌ Please enter a valid net self-employment income.
What Is Self-Employment Tax?
Self-employment tax (SE tax) is a tax that self-employed individuals, freelancers, and independent contractors must pay to fund Social Security and Medicare. While traditional employees split these taxes with their employers — each paying 7.65% for a total of 15.3% — self-employed individuals are responsible for the full 15.3%. However, you can deduct half of your SE tax (the employer-equivalent portion) as an adjustment to income on your federal tax return.
The SE tax consists of two components: Social Security tax (12.4% on earnings up to the annual wage base limit, which is $168,600 for 2024 and $176,100 for 2025) and Medicare tax (2.9% on all net earnings with no cap). In 2025, the Social Security wage base limit is $176,100, meaning only the first $176,100 of your combined self-employment and W-2 income is subject to the Social Security portion.
✅ Did You Know? The SE tax is calculated on 92.35% of your net self-employment income — not 100%. This is because the IRS allows you to exclude the employer-equivalent portion of the tax from the base, effectively ensuring you aren't taxed on the money used to pay the employer's share.
2025 Self-Employment Tax Rates
Component
Rate
Income Cap
Description
Social Security
12.4%
$176,100 (2025)
Old-Age, Survivors, and Disability Insurance (OASDI)
Medicare
2.9%
No cap
Hospital Insurance (HI)
Additional Medicare
0.9%
Income thresholds apply
Additional 0.9% on earnings above threshold
Total SE Tax
15.3%
Varies by component
Combined rate on 92.35% of net earnings
Additional Medicare Tax Thresholds
High-income filers may owe an Additional Medicare Tax of 0.9% on self-employment income exceeding certain thresholds based on filing status:
Filing Status
Threshold Amount
Married Filing Jointly
$250,000
Married Filing Separately
$125,000
Single
$200,000
Head of Household
$200,000
Qualifying Surviving Spouse
$250,000
Calculator Features
🎯
Accurate SE Tax Calculation
Calculates the full 15.3% SE tax (12.4% Social Security + 2.9% Medicare) on 92.35% of your net earnings, including the Additional Medicare Tax for high earners.
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Deductible Portion
Shows the 50% deductible portion of your SE tax that reduces your adjusted gross income, saving you money on income tax too.
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Detailed Breakdown
Get a full breakdown of Social Security, Medicare, Additional Medicare, and your effective SE tax rate — all in one view.
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Tax Impact Summary
See the estimated tax savings from the SE tax deduction and your effective SE tax rate to plan your quarterly estimated tax payments.
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Privacy Protected
All calculations are performed locally in your browser. Your financial data never leaves your device.
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Mobile Friendly
Responsive design works perfectly across desktop, tablet, and mobile devices.
How to Use the Self-Employment Tax Calculator
Step 1: Enter Your Net Self-Employment Income
This is your total self-employment income (from your Schedule C or other business income) minus all allowable business expenses. You can find this amount on Schedule C (Form 1040), line 31 — "Net profit or (loss)." If you have multiple self-employment activities, combine the net profits from all of them.
Step 2: Add W-2 Income (Optional)
If you also have a traditional job with W-2 wages, enter that annual amount. This helps us determine whether you exceed the Additional Medicare Tax threshold and whether the Social Security wage base limit has been partially met through your employer. W-2 wages already have their Social Security and Medicare taxes withheld, so only self-employment income above the applicable thresholds may be subject to additional tax.
Step 3: Select Your Filing Status
Choose your tax filing status from the dropdown. This determines the Additional Medicare Tax threshold that applies to you — $200,000 for single filers, $250,000 for married filing jointly, or $125,000 for married filing separately. Your total income (self-employment plus W-2) is compared against these thresholds.
Example: A single freelancer with $65,000 in net self-employment income and no W-2 wages would pay approximately $9,171 in SE tax ($65,000 × 92.35% = $60,028; × 15.3% = $9,184). They can deduct $4,592 (half) from their income for income tax purposes, potentially saving $1,010 to $1,607 depending on their tax bracket.
Self-Employment Tax Formulas
SE Tax Base Calculation
SE Tax Base = Net Self-Employment Income × 92.35%
Net Self-Employment Income
Schedule C net profit (line 31) or total self-employment earnings minus expenses
92.35%
The percentage of net earnings subject to SE tax (reflects the employer-equivalent deduction)
Total SE Tax Formula
Total SE Tax = (SE Tax Base × 12.4%) + (SE Tax Base × 2.9%) + Additional Medicare
12.4%
Social Security (OASDI) tax rate — applies up to the annual wage base limit
2.9%
Medicare (HI) tax rate — applies to all net earnings with no cap
Additional Medicare
0.9% surtax on earnings exceeding filing-status-specific thresholds
SE Tax Deduction Formula
Deduction = Total SE Tax × 50%
You can deduct half of your self-employment tax as an adjustment to income (above-the-line deduction) on Form 1040, Schedule 1, line 15. This deduction does not require itemizing and reduces your adjusted gross income (AGI).
Social Security Wage Base Limit Check
Social Security SE Tax = 12.4% × min(SE Tax Base, (Wage Base Limit - W-2 SS Wages))
If you have W-2 wages, the Social Security portion of your SE tax only applies to the amount of your SE tax base that doesn't exceed the remaining Social Security wage base limit. For 2025, the wage base limit is $176,100. If your W-2 wages already reached this limit, you pay 0% Social Security tax on your self-employment income (but still pay the full Medicare portion).
Self-Employment Tax Tips & Best Practices
Planning for SE Tax
Make Quarterly Estimated Payments
Since self-employment taxes aren't withheld from paychecks, you need to make quarterly estimated tax payments (Form 1040-ES). A good rule is to set aside 25-30% of each payment you receive for taxes.
Track All Business Expenses
Every legitimate business expense reduces your net self-employment income, which directly lowers your SE tax. Use accounting software or a dedicated business bank account to track expenses year-round.
Consider an S-Corp Election
Once your net income exceeds $60,000-$80,000, electing S-Corp status can reduce SE tax by allowing you to take a portion of your income as distributions (not subject to SE tax) rather than salary.
Don't Forget the Deduction
Half of your SE tax is deductible above-the-line. This reduces your AGI and potentially your income tax. Our calculator shows you the estimated savings from this deduction.
Use a SEP IRA or Solo 401(k)
Contributions to retirement accounts reduce your net income AND lower your SE tax. You can contribute up to 25% of your net earnings (up to $70,000 for 2025) to a SEP IRA.
Watch the Social Security Wage Base
If you have both W-2 wages and self-employment income, you may hit the Social Security wage base with your W-2 wages alone, making you pay only Medicare (2.9%) on your SE income.
Common Deductions for Freelancers
Home Office Deduction
If you use a dedicated space in your home regularly and exclusively for business, you can deduct $5 per square foot (up to 300 sq ft) or actual expenses.
Health Insurance Premiums
Self-employed individuals can deduct health, dental, and long-term care insurance premiums for themselves, their spouse, and dependents — even without itemizing.
Business Equipment & Supplies
Computers, software, office supplies, furniture, and equipment used for your business are deductible. Section 179 allows you to expense the full cost in the year of purchase.
Vehicle & Travel Expenses
Business mileage (67 cents/mile for 2024, 70 cents/mile for 2025), parking, tolls, and business travel costs are deductible. Keep a detailed mileage log.
Frequently Asked Questions (FAQ)
What is the self-employment tax rate for 2025?
The self-employment tax rate for 2025 is 15.3%, which includes 12.4% for Social Security (OASDI) and 2.9% for Medicare (HI). The Social Security portion applies only to the first $176,100 of combined W-2 and self-employment income, while the Medicare portion applies to all earnings with no cap. High-income earners may also owe an additional 0.9% Medicare surtax on earnings above $200,000 (single) or $250,000 (married filing jointly).
Why is SE tax calculated on 92.35% of my income rather than 100%?
The IRS allows you to calculate your SE tax on 92.35% of your net earnings because this adjustment accounts for the fact that you can deduct half of your SE tax on your tax return. Since the deduction reduces your income, the IRS adjusts the tax base to avoid double-counting. In effect, the 92.35% multiplier represents 100% minus the employer-equivalent rate of 7.65% (half of 15.3%). This ensures you're only taxed on the actual economic benefit you receive from your self-employment earnings.
Can I deduct half of my self-employment tax?
Yes. You can deduct 50% of your self-employment tax as an adjustment to income on Form 1040, Schedule 1, line 15. This is an above-the-line deduction, meaning you can claim it even if you don't itemize deductions on Schedule A. This deduction reduces your adjusted gross income (AGI), which may also lower your income tax and potentially increase eligibility for other tax credits and deductions. Our calculator shows you the estimated tax savings from this deduction based on your assumed tax bracket.
How do I pay self-employment taxes as a freelancer?
Freelancers pay self-employment taxes through quarterly estimated tax payments using Form 1040-ES. These payments are due four times per year: April 15, June 15, September 15, and January 15 of the following year. If you expect to owe $1,000 or more in taxes when you file, you're generally required to make quarterly payments. You can use our calculator to estimate your SE tax burden and set aside ~25-30% of each payment you receive. Many freelancers open a separate high-yield savings account specifically for tax savings.
What's the difference between SE tax and income tax?
Self-employment tax and income tax are two separate taxes. SE tax funds Social Security and Medicare and is calculated on your net self-employment earnings at a flat 15.3% rate (plus potential Additional Medicare tax). Income tax is calculated on your total taxable income (including your SE income) using progressive tax brackets (10% to 37%). You must pay both SE tax and income tax on your self-employment income. The SE tax is calculated on Schedule SE and reported on Schedule 2, while income tax is calculated using the tax tables in the Form 1040 instructions.
Do I pay SE tax if I'm a single-member LLC owner?
Yes. For tax purposes, a single-member LLC is treated as a disregarded entity (sole proprietorship) by the IRS unless you elect to be taxed as an S-Corp or C-Corp. Single-member LLC owners pay SE tax on all of their net earnings from the business because they are considered self-employed. If you elect S-Corp taxation, you can reduce SE tax by taking a reasonable salary (subject to payroll taxes) and distributing remaining profits as dividends (not subject to SE tax).
What happens if I have both W-2 income and self-employment income?
If you have both W-2 wages and self-employment income, your Social Security wage base applies to your combined earnings. For 2025, the wage base limit is $176,100. If your W-2 wages are below this limit, you'll pay the Social Security portion (12.4%) on your self-employment income only up to the remaining amount before hitting the cap. If your W-2 wages already exceed the limit, you pay 0% Social Security tax on your SE income. However, the Medicare portion (2.9%) plus the Additional Medicare Tax (0.9% if applicable) always apply regardless of the wage base cap.
Are there any exemptions from self-employment tax?
Yes, there are a few situations where you might be exempt from SE tax: (1) You have net earnings of less than $400 in a tax year (no SE tax is due); (2) You're a minister or member of a religious order who has filed for an exemption from SE tax; (3) You're a member of certain religious sects that are conscientiously opposed to Social Security benefits and have been approved for an exemption; (4) You're a nonresident alien with no US work visa. Additionally, rental income (unless you're a real estate professional) and capital gains are generally not subject to SE tax.
How does the Additional Medicare Tax work for self-employed individuals?
The Additional Medicare Tax is a 0.9% surtax that applies to your self-employment income (and/or Medicare wages) exceeding certain thresholds based on filing status. For single filers and heads of household, the threshold is $200,000. For married filing jointly, it's $250,000. For married filing separately, it's $125,000. Unlike the regular Medicare tax, the Additional Medicare Tax is calculated on your combined income (including your spouse's if married filing jointly) rather than your individual earnings. Our calculator automatically includes this in the breakdown when applicable.
Should I set up an S-Corp to reduce SE tax?
An S-Corp election can reduce your SE tax burden, but it's generally only advantageous once your net self-employment income exceeds $60,000-$80,000 annually. With an S-Corp, you pay yourself a reasonable salary (subject to payroll taxes) and take the remaining profits as distributions (not subject to SE tax). The trade-offs include additional accounting costs, payroll processing fees, filing a separate corporate tax return (Form 1120-S), and stricter compliance requirements. Before making the election, calculate the potential SE tax savings against the added administrative costs. Our calculator can help you estimate your current SE tax burden to compare against a potential S-Corp structure.
About This Self-Employment Tax Calculator
Our Self-Employment Tax Calculator is designed to help freelancers, independent contractors, gig workers, and small business owners estimate their self-employment tax liability quickly and accurately. Whether you're a full-time freelancer or you have a side business in addition to your regular job, understanding your SE tax burden is essential for proper tax planning and avoiding surprises at tax time.
Why Our Calculator?
🎯
Comprehensive & Accurate
Uses the official IRS Schedule SE formula: 15.3% on 92.35% of net earnings, with proper handling of the Social Security wage base limit and Additional Medicare Tax.
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Deductible Portion
Shows the 50% deduction that reduces your income tax, with estimated savings based on your tax profile.
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Detailed Breakdown
See exactly how your SE tax is calculated — Social Security, Medicare, Additional Medicare, and the effective tax rate on your self-employment income.
🔒
Private & Secure
All calculations happen locally in your browser. No data is stored, transmitted, or shared with any third party.
📱
Mobile Optimized
Works perfectly on any device — desktop, tablet, or smartphone. Calculate your SE tax on the go.
🆓
Completely Free
Professional-grade SE tax calculations at no cost. No registration, no sign-ups, no hidden fees.
⚠️ Disclaimer: This calculator is designed for estimation and educational purposes. While we follow IRS guidelines for SE tax calculations, actual tax liability may vary based on your specific circumstances, deductions, credits, and changes in tax law. The 2024 Social Security wage base ($168,600) is used as the default reference, with 2025 figures ($176,100) noted where applicable. For precise tax planning and filing, consult with a qualified tax professional or CPA.