Self-Employment Tax: What It Is, How to Calculate It

You may need to pay self-employment tax if you’re a freelancer, an independent contractor or a small-business owner. Here’s what self-employment tax is, how it works and how you can save.

What is self-employment tax?

The self-employment tax rate is 15.3%. That rate is the sum of 12.4% for Social Security and 2.9% for Medicare. Self-employment tax applies to net earnings — what many call profit. You may need to pay self-employment taxes throughout the year.

There's one big difference between self-employment tax and the payroll taxes people with employers pay: Typically, employees and their employers split the bill on Social Security tax and Medicare tax (i.e., you pay 7.65% and your employer pays 7.65%), whereas self-employed people pay both halves.

Who has to pay self-employment tax?

In general, you have to pay self-employment tax if either of these things are true during the year:

• You had $400 or more in net earnings from self-employment (excluding anything you made as a church employee). You may be self-employed in the eyes of the IRS if you received a 1099 form from an entity you did work for.

• You had $108.28 or more in income from church employment.

The tax rules apply no matter how old you are and even if you’re receiving Social Security or are on Medicare.

Self-employment tax rate

The self-employment tax rate is 15.3%, which is a combination of a 12.4% Social Security tax (also known as OASDI tax) and a 2.9% Medicare tax on net earnings. Self-employment tax is not the same as income tax.

In 2025, only the first $176,100 of earnings is subject to the Social Security portion. In 2024, that threshold was $168,600. A 0.9% additional Medicare tax may also apply if your net earnings from self-employment exceed $200,000 if you’re a single filer or $250,000 if you’re filing jointly.

How to calculate self-employment tax

Calculating your tax starts by calculating your net earnings from self-employment for the year.

• For tax purposes, net earnings are usually your gross income from self-employment minus your business expenses.

• Generally, 92.35% of your net earnings from self-employment is subject to self-employment tax.

• Once you’ve determined how much of your net earnings from self-employment are subject to tax, apply the 15.3% tax rate.

• Remember, though — for 2025, only the first $176,100 of earnings is subject to the Social Security portion of self-employment tax.

If you had a loss or just a little bit of income from self-employment, be sure to check out the two optional methods in IRS Schedule SE to calculate your net earnings.

Self-employment tax calculator

Fill in the fields below to estimate your potential self-employment tax for the 2025 calendar year.

How to pay self-employment tax

• Generally, you use IRS Schedule C to calculate your net earnings from self-employment, and you use IRS Schedule SE to calculate how much self-employment tax you owe.

• You’ll need to provide your Social Security number or individual taxpayer identification number (ITIN) when you pay the tax.

• Taxes are a pay-as-you-go deal in the United States, so waiting until the annual tax filing deadline to pay your self-employment tax may mean incurring late-payment penalties. Instead, you may need to make quarterly estimated tax payments throughout the year if you expect:

1. You’ll owe at least $1,000 in federal income taxes this year, even after accounting for your withholding and refundable credits (such as the earned income tax credit), and

2. Your withholding and refundable credits will cover less than 90% of your tax liability for this year or 100% of your liability last year, whichever is smaller. (The threshold is 110% of tax owed last year if your adjusted gross income for 2024 was more than $150,000 for married couples filing jointly or $75,000 for singles.)

Tax deductions for self-employment

You can deduct half of your self-employment tax on your income taxes. So, for example, if your Schedule SE says you owe $2,000 in self-employment tax for the year, you'll need to pay that money when it's due during the year, but at tax time $1,000 would be deductible on your 1040.

Self-employment can score you a bunch of sweet tax deductions, too. One is the qualified business income deduction, which lets you take an income tax deduction for as much as 20% of your self-employment net income. Plus, there are other deductions available for your home office, health insurance and more. Here’s a primer on self-employment deductions.