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

The average W-2 employee never sees 7.65% of their paycheck. It vanishes into Social Security and Medicare before it hits their bank account, and their employer quietly matches it. Self-employed workers don't get that luxury. They pay both halves: 15.3% of net earnings, right off the top, before income tax even enters the picture.

That's 16.77 million self-employed Americans writing a check for a tax most employees barely know exists.

30-Second Summary: Self-employment tax is 15.3% (12.4% Social Security + 2.9% Medicare) applied to 92.35% of your net profit. You owe it if net earnings exceed $400. You can deduct half the amount on your income tax return.

What Self-Employment Tax Actually Is

Self-employment tax funds the same two programs that W-2 employees pay into through FICA: Social Security and Medicare. The difference is who writes the check.

Employees pay 7.65%. Their employer matches it with another 7.65%. When you're self-employed, you're both the worker and the boss. So you pay both halves: 15.3%.

That 15.3% breaks into two pieces:

The Social Security portion stops at $176,100 for the 2025 tax year. Earn more than that from self-employment? You only pay the 2.9% Medicare tax on the excess. For 2026, the cap rises to $184,500.

One detail that trips people up: self-employment tax is not the same as income tax. You pay both. A freelancer earning $70,000 might owe roughly $10k in self-employment tax and then another chunk in federal income tax on top of that. They're separate bills for separate purposes.

Who Owes Self-Employment Tax

The threshold is low: $400 in net earnings from self-employment. That's profit, not revenue. If you charged clients $5,000 but spent $4,700 on equipment and travel, your net earnings are $300, and you owe nothing.

But cross that $400 line and the full 15.3% applies. There's no gradual phase-in.

People who typically owe this tax:

• Freelancers and independent contractors
• Sole proprietors and single-member LLC owners
• Gig workers (Uber, DoorDash, Etsy sellers)
• Partners in a business partnership
• Anyone who receives a 1099-NEC

Your day job is irrelevant. A software engineer earning $150,000 at her W-2 job who sells $800 worth of handmade candles on the side still owes self-employment tax on the candle profit. (Though her W-2 wages do interact with the Social Security cap, which we'll cover below.)

The rule applies regardless of age. Collecting Social Security? Already on Medicare? Doesn't matter. Earn $400+ from self-employment and you owe the tax.

The 92.35% Rule (and Why It Exists)

Here's where it gets slightly less painful. You don't pay 15.3% on your full net profit. You pay it on 92.35% of net profit.

Why 92.35%? When an employer pays their half of FICA, that portion isn't counted as employee wages. The IRS applies the same logic to self-employed workers by letting them exclude the "employer equivalent" portion before calculating the tax. The math works out to multiplying your net earnings by 0.9235.

Think of it as a small built-in discount. On $50,000 in net profit, the difference between taxing the full amount versus 92.35% saves you about $586.

How to Calculate Self-Employment Tax (With Real Numbers)

Let's walk through two scenarios that cover the most common situations.

Scenario A: Mia, Freelance Copywriter ($45,000 Net Profit)

Mia is 29, single, and runs a one-person copywriting business from her apartment in Austin. After deducting her software subscriptions, home office costs, and a new laptop, her Schedule C shows $45,000 in net profit.

Step 1: Apply the 92.35% factor $45,000 × 0.9235 = $41,557.50

Step 2: Calculate self-employment tax $41,557.50 × 0.153 = $6,358.30

Breaking that down:

• Social Security: $41,557.50 × 0.124 = $5,153.13
• Medicare: $41,557.50 × 0.029 = $1,205.17

Step 3: Deduct half on her 1040 Mia gets to subtract $3,179.15 (half of $6,358.30) from her gross income when calculating income tax. This is an "above the line" deduction, meaning she doesn't need to itemize to claim it.

Mia's total self-employment tax: $6,358.30. That's money she needs to have set aside before she even thinks about income tax.

Scenario B: James, IT Consultant ($200,000 Net Profit)

James is 41, married, and earns $200,000 in net profit as an independent IT consultant. He has no W-2 job.

Step 1: Apply the 92.35% factor $200,000 × 0.9235 = $184,700

Step 2: Calculate Social Security tax (with the cap) The 2025 wage base is $176,100. James only pays the 12.4% Social Security rate on that amount: $176,100 × 0.124 = $21,836.40

Step 3: Calculate Medicare tax (no cap) $184,700 × 0.029 = $5,356.30

Step 4: Check for Additional Medicare Tax The 0.9% Additional Medicare Tax applies to self-employment earnings above certain thresholds ($250,000 for married filing jointly, $200,000 for single filers). James's taxable SE earnings of $184,700 fall below both thresholds, so the surtax doesn't apply here. If his total income from all sources pushed past those limits, it would.

James's total self-employment tax: $27,192.70

His income tax deduction: $13,596.35 (half of $27,192.70).

The contrast between Mia and James shows something important. Mia pays an effective SE rate of about 14.1% on her net profit. James pays about 13.6% because the Social Security cap shields his higher earnings from the 12.4% portion. But James still writes a much larger check.

The Deduction That Softens the Blow

You can deduct half of your self-employment tax from your gross income on Form 1040. This is not an itemized deduction. It goes on Schedule 1 as an adjustment to income, lowering your AGI before you even get to the standard deduction.

This matters because a lower AGI can qualify you for other tax benefits, affect your eligibility for certain credits, and reduce your income tax bracket.

To be clear: the deduction doesn't reduce your self-employment tax. It reduces the income tax you owe on everything else. Mia still pays $6,358.30 in SE tax. But her income tax bill drops because she's taxed on a lower AGI.

Life gets messy here, and the math doesn't always cooperate. If you also have W-2 income, the interaction between FICA withholding and self-employment tax gets complicated. FICA taxes from your day job count toward the Social Security wage base. So if your W-2 salary already hits the $176,100 cap, your side-hustle profit is only subject to the 2.9% Medicare portion, not the full 15.3%. That's a real savings for people with high-earning day jobs and moderate side income.

How to Pay Self-Employment Tax

You don't wait until April. The IRS operates on a pay-as-you-go system, which means you make estimated quarterly tax payments throughout the year.

The forms involved:

• Schedule C (Form 1040): Calculates your net business profit
• Schedule SE (Form 1040): Calculates your self-employment tax
• Form 1040-ES: Worksheet for estimating quarterly payments

If you expect to owe $1,000 or more in total federal tax after withholding and credits, you're required to make quarterly payments. Miss them and you'll face underpayment penalties, currently calculated at a 7% annual interest rate.

Payment options include IRS Direct Pay (free, instant bank transfer), credit or debit card (with processing fees), or EFTPS for existing enrollees.

Common Misconceptions

"A Solo 401(k) reduces my self-employment tax." No. Contributing to a Solo 401(k) or SEP IRA reduces your income tax, not your SE tax. Self-employment tax is calculated on Schedule C net profit, which comes before retirement contributions.

"Forming an LLC will lower my SE tax." A single-member LLC is a "disregarded entity" for tax purposes. You still pay SE tax on all profits. To potentially reduce SE tax, you'd need to elect S-Corp status and split income between a reasonable salary and distributions. That's a conversation for a CPA, not a DIY project.

"I made under $600, so I don't owe anything." The $600 threshold applies to whether a client sends you a 1099-NEC. Your obligation to pay SE tax starts at $400 in net earnings, regardless of whether you received any forms. Learn more about reporting income without a 1099.

Your Next Move

1. Calculate your estimated SE tax. Use our self-employment tax calculator to run your numbers. Plug in your expected net profit and see what you'll owe.

2. Open a separate savings account. Transfer 25-30% of every payment you receive into a dedicated tax savings account at Ally, Marcus by Goldman Sachs, or your bank of choice. The SE tax alone is ~14% of net profit. Income tax adds more.

3. Set quarterly reminders. April 15, June 15, September 15, January 15. Miss a date and you start accruing penalties.

4. Track every expense. Every legitimate business deduction lowers your net profit, which directly reduces SE tax. That $50/month software subscription saves you about $92 per year in SE tax alone.

5. Consider your business structure. If your net profit consistently exceeds sixty thousand dollars, ask a CPA about S-Corp election. The potential SE tax savings can be significant, though compliance costs increase.