Self-Employment Tax Guide: Rates, Calculations, and Reduction Strategies

Self-employment tax catches many new LLC owners off guard. On top of federal and state income taxes, you owe an additional 15.3% on your net business earnings. This guide breaks down exactly how the tax works, when you pay it, and how to reduce it.

What Is Self-Employment Tax?

Self-employment (SE) tax is the Social Security and Medicare tax that self-employed people pay. It exists because W-2 employees have these taxes split between themselves and their employer: the employee pays half, and the employer pays the other half. As a self-employed LLC owner, you are both the employer and the employee. You pay both halves yourself.

The tax funds two federal programs:

• Social Security (12.4%): Provides retirement benefits, disability insurance, and survivor benefits. You earn Social Security credits based on your self-employment income, just like a W-2 employee does through their wages.
• Medicare (2.9%): Funds health insurance for Americans aged 65 and older, as well as certain younger people with disabilities. Unlike Social Security, there is no income cap on Medicare tax.

Self-employment tax is separate from income tax. You pay SE tax AND income tax on your LLC profits. For a profitable LLC owner, the combined tax burden can reach 30-40% or more when you add federal income tax, state income tax, and self-employment tax together.

How Self-Employment Tax Is Calculated

The SE tax calculation has several layers. Here is how it works for the 2024 tax year.

Step 1: Calculate Net Self-Employment Earnings

Start with your LLC's gross revenue. Subtract all ordinary and necessary business expenses (supplies, software, rent, travel, professional services, etc.). The result is your net self-employment income.

Step 2: Apply the 92.35% Factor

The IRS does not apply SE tax to 100% of your net earnings. You multiply your net income by 92.35% (0.9235) first. This adjustment accounts for the "employer half" of the tax that a traditional employer would deduct as a business expense. You report this calculation on Schedule SE of your Form 1040.

Step 3: Apply the Tax Rates

Example Calculations

Here are two examples at different income levels.

Notice that Social Security tax stops at $168,600 in earnings (for 2024). Above that threshold, you only pay the Medicare portion. The Additional Medicare Tax adds 0.9% on earnings above $200,000 for single filers.

Quarterly Estimated Payments

Unlike W-2 employees who have taxes withheld from every paycheck, self-employed LLC owners must make quarterly estimated tax payments to the IRS. These payments cover both income tax and self-employment tax.

Who Must Pay Quarterly

You are required to make quarterly estimated payments if you expect to owe $1,000 or more in combined income and self-employment tax for the year. Since the SE tax alone on $10,000 in profit is roughly $1,413, most profitable LLC owners need to pay quarterly.

Due Dates

How to Pay

Use Form 1040-ES to calculate your quarterly payment amounts. You can pay through:

• IRS Direct Pay: Free electronic payment at irs.gov/directpay
• EFTPS: Electronic Federal Tax Payment System (requires enrollment)
• IRS2Go app: Mobile payment through the IRS app
• Mail: Send a check with Form 1040-ES payment voucher

Calculating Your Quarterly Amount

The simplest approach is to estimate your total annual tax liability (income tax plus SE tax) and divide by four. If your income varies by season, you can use the annualized installment method on Form 2210 to base each payment on actual income for that quarter.

Many LLC owners set aside 25-30% of each payment received into a dedicated savings account for taxes. This prevents the quarterly payment from being a financial shock.

The SE Tax Deduction

There is one piece of good news about self-employment tax: you can deduct half of it on your income tax return.

This deduction works as follows:

• Calculate your total SE tax on Schedule SE
• Divide that number by two
• Deduct that amount on Schedule 1 (line 15) of your Form 1040

This is an "above-the-line" deduction, which means you get it whether you itemize deductions or take the standard deduction. It reduces your adjusted gross income (AGI), which lowers your income tax. It does not reduce the SE tax itself.

Example

In this example, the deduction saves $933 in income tax. It does not eliminate the $8,478 SE tax bill, but it does lower it effectively to about $7,545 after the income tax savings.

Ways to Reduce Self-Employment Tax

You cannot avoid self-employment tax entirely if you have a profitable LLC, but there are legitimate strategies to lower the amount you owe.

1. S-Corp Election

The most common strategy for reducing SE tax is electing S-Corporation status for your LLC. With S-Corp election, you split your business income into two categories:

• Salary: Subject to payroll taxes (equivalent to SE tax)
• Distributions: Not subject to SE tax or payroll taxes

If your LLC earns $100,000 and you pay yourself a $50,000 salary, only the salary is subject to the 15.3% tax. The remaining $50,000 in distributions avoids SE tax, saving you roughly $7,065. After accounting for added payroll and accounting costs ($2,000-3,500), you still save $3,500 to $5,000 per year.

S-Corp election makes sense when your net profit consistently exceeds $40,000 annually. See our S-Corp election guide for the full process.

2. Maximize Business Deductions

Every dollar you deduct as a business expense reduces your net self-employment income, which reduces your SE tax. Common deductions include:

• Home office expenses
• Business travel and meals (50% for meals)
• Software subscriptions and tools
• Professional development and education
• Professional services (legal, accounting)
• Equipment and supplies

See our LLC tax deductions guide for a full list of deductible expenses.

3. Retirement Contributions

Contributions to qualified retirement plans reduce your taxable income, which can lower your SE tax base. Two options are especially useful for self-employed LLC owners:

• SEP IRA: Contribute up to 25% of your net self-employment earnings, with a 2024 maximum of $69,000. Contributions are deductible on your income tax return.
• Solo 401(k): Contribute up to $23,000 as an employee deferral (plus a 25% employer contribution), with a combined maximum of $69,000 for 2024. If you are 50 or older, you can add a $7,500 catch-up contribution.

4. Hire Family Members

If you have a spouse or children who can perform legitimate work for your business, paying them a reasonable salary shifts income from your SE tax return to theirs. Children under 18 working for a parent's sole proprietorship or single-member LLC are exempt from FICA taxes. Wages paid to a spouse are subject to FICA but can qualify them for Social Security benefits independently.

5. Health Insurance Deduction

Self-employed individuals can deduct 100% of their health insurance premiums for themselves, their spouse, and dependents. This deduction is above-the-line, reducing your AGI and the income upon which SE tax is calculated if structured properly.

Frequently Asked Questions