Self-Employment Tax vs Income Tax: Key Differences
Short answer
Self-employment tax and income tax are separate taxes with distinct purposes: self-employment tax covers Social Security and Medicare contributions for self-employed individuals, while income tax applies broadly to all taxable earnings, including self-employment income. Both taxes must be paid by self-employed individuals, but they differ in calculation, reporting, and impact on your tax bill.
What Is Self-Employment Tax and Who Pays It?
Self-employment tax is a tax that self-employed individuals pay to fund Social Security and Medicare. When working as an employee, these taxes are automatically withheld from your paycheck as payroll taxes (FICA), usually split between you and your employer. However, if you work for yourself, you are responsible for the entire amount since you are both employer and employee. This tax applies to your net earnings from self-employment—your gross income minus allowable business expenses. For example, if you make $50,000 freelancing but have $10,000 in deductible expenses, self-employment tax applies to $40,000. The current self-employment tax rate is about 15.3%, which combines 12.4% for Social Security and 2.9% for Medicare. You calculate this tax using Schedule SE (Self-Employment Tax) attached to your Form 1040.
This tax is mandatory if your net self-employment income exceeds a minimum threshold (usually around $400). Some exceptions apply, such as certain religious groups or specific types of income. It is important to keep detailed records of your income and expenses to accurately calculate this tax. Because you pay both the employer and employee portions, self-employment tax can significantly increase your tax liability compared to employees. However, you can deduct half of the self-employment tax on your income tax return as an adjustment to income, lowering your taxable income.
What Is Income Tax and How Does It Apply to Self-Employed Individuals?
Income tax is a tax on all taxable income, including wages, interest, dividends, rental income, and self-employment income. Unlike self-employment tax, income tax funds a broad range of government services and is calculated on your total taxable income after deductions and exemptions. For example, if your total income from all sources is $60,000 and you have $12,000 in deductions, your taxable income is $48,000, which determines your income tax liability.
Self-employed individuals must report income tax on their net earnings, just like employees who receive a W-2. Income tax rates are progressive, meaning the rate increases as your taxable income rises. The IRS provides tax brackets that help you determine your rate for each portion of your taxable income. You report income tax on Form 1040, along with schedules that detail income sources and deductions. Unlike self-employment tax, income tax applies to all kinds of income, not just earnings from self-employment, and is generally withheld from employees’ paychecks but paid in estimated quarterly payments by self-employed people.
To estimate your income tax, you calculate your adjusted gross income (AGI), then subtract deductions and credits to find your taxable income. If you have a home office or business-related expenses, these will reduce your AGI, which lowers both your income tax and self-employment tax.
How Do Self-Employment Tax and Income Tax Differ?
The key differences between self-employment tax and income tax can be summarized in the following table:
| Feature | Self-Employment Tax | Income Tax |
|---|---|---|
| Purpose | Funds Social Security and Medicare | Funds general federal government programs |
| Applies To | Net earnings from self-employment | All taxable income (wages, interest, self-employment, etc.) |
| Who Pays It | Self-employed individuals paying full share | All individuals with taxable income |
| Tax Rate | Approximately 15.3% on net self-employment income | Progressive rates based on income brackets |
| Reporting Forms | Schedule SE with Form 1040 | Form 1040 and relevant schedules |
| Employer Contribution | No employer; self pays both parts | Employer pays half of Social Security and Medicare taxes for employees |
| Deductibility | Half deductible as an adjustment to income | Deductions and credits reduce taxable income |
| Frequency of Payment | Typically paid as estimated quarterly taxes | Withheld by employer or paid as estimated taxes |
In essence, self-employment tax is a specific tax on self-employment income to cover Social Security and Medicare, while income tax is broader and applies to all taxable income. Employees pay only half of Social Security and Medicare taxes, while self-employed people pay the full amount via self-employment tax.
Who Pays Self-Employment Tax and Who Pays Income Tax?
Anyone earning income from self-employment—such as freelancers, independent contractors, consultants, or small business owners—must pay self-employment tax if their net earnings exceed the IRS threshold. This applies even if you have another job where taxes are withheld. For example, if you work a part-time job and also freelance on the side, you pay income tax on all your income but self-employment tax only on your net freelance income.
Income tax applies to virtually everyone earning taxable income above the standard deduction or exemption amount, whether through a job, investments, or self-employment. Employees paying W-2 wages have income tax withheld by their employer and do not pay self-employment tax. However, self-employed individuals must pay both self-employment tax and income tax on their earnings.
Knowing which taxes apply helps you plan your finances, save for taxes, and avoid surprises. It also determines which forms to file and how to calculate your estimated tax payments.
How Do You Calculate and Pay Self-Employment Tax and Income Tax?
Calculating self-employment tax begins with determining your net self-employment income. This means subtracting all allowable business expenses from your gross income. Common expenses include supplies, business travel, home office costs, and professional fees. After finding net income, multiply by 92.35% (to account for the employer portion exclusion) and then apply the self-employment tax rate of about 15.3%.
For example, if your net profit is $30,000:
- Multiply $30,000 by 92.35% = $27,705
- Apply 15.3% tax rate = $4,238 self-employment tax owed
Half of this amount ($2,119) can be deducted from your gross income when calculating income tax.
Income tax requires calculating your adjusted gross income (AGI), subtracting deductions (standard or itemized), and applying tax brackets to taxable income. Self-employed individuals often pay estimated taxes quarterly using Form 1040-ES to avoid penalties. These estimated payments cover both income and self-employment taxes.
Keeping accurate and organized records is essential for both taxes. Numerous accounting software options can help track income and expenses to simplify tax filing.
What Are the Key Differences Between Self-Employment Tax and Employee Payroll Tax?
When employed, payroll taxes (Social Security and Medicare) are automatically withheld from your paycheck, totaling 7.65%. Your employer matches this amount, paying another 7.65%, for a total of 15.3%. In contrast, self-employed individuals pay the entire 15.3% themselves as self-employment tax.
The difference means self-employed workers may owe significantly more tax compared to employees earning the same amount, but they also have the ability to deduct half of the self-employment tax from income, which employees cannot. Employees do not file Schedule SE; self-employed individuals do.
Another difference is withholding: employees’ income and payroll taxes are withheld by employers, while self-employed individuals must calculate, pay, and file taxes themselves, often through quarterly estimated payments. This requires good financial planning to avoid underpayment penalties.
Can You Avoid or Reduce Self-Employment Tax?
Self-employment tax must be paid on net earnings above the IRS threshold; there is no legal way to avoid it on self-employment income. However, some strategies can reduce the amount owed:
- Business Expenses: Deduct all valid business expenses to lower net income subject to self-employment tax.
- Retirement Contributions: Contribute to tax-advantaged retirement accounts, which reduce taxable income.
- S Corporation Election: Some business owners elect to be taxed as an S Corporation, paying themselves a reasonable salary subject to self-employment tax and taking additional profit distributions not subject to the tax. This requires careful setup and compliance with IRS rules.
- Health Insurance Deduction: Self-employed individuals can often deduct health insurance premiums, lowering taxable income.
These strategies should be discussed with a tax professional to ensure compliance and optimize tax benefits.
Frequently asked questions
What income counts toward self-employment tax?
Net earnings from self-employment after deducting expenses count toward self-employment tax. Wages from a job or investment income do not.
How is self-employment tax different from federal income tax?
Self-employment tax funds Social Security and Medicare and applies only to self-employment income. Income tax applies to all taxable income and funds various government programs.
Do employees pay self-employment tax?
No. Employees pay half of Social Security and Medicare taxes through payroll withholding; employers pay the other half. Self-employment tax covers both shares for self-employed individuals.
Can I deduct self-employment tax on my tax return?
Yes, you can deduct half of the self-employment tax as an adjustment to income, which reduces your taxable income for income tax purposes.
How often do self-employed individuals pay taxes?
Typically, self-employed individuals make estimated tax payments quarterly to cover both income and self-employment taxes and file an annual return.
Does self-employment income affect eligibility for Social Security benefits?
Yes, paying self-employment tax credits you for Social Security and Medicare benefits, similar to employee payroll tax contributions.