What Is Self-Employment Tax?
When you work as an employee, your employer pays half of your FICA taxes (6.2% Social Security + 1.45% Medicare = 7.65%) and withholds the other 7.65% from your paycheck. As a self-employed individual, you are both the employer and the employee — so you pay both halves, for a combined rate of 15.3%.
SE tax is calculated on Schedule SE (Form 1040) and is separate from your federal income tax. You owe SE tax even if you owe no income tax. It kicks in once your net self-employment income exceeds $400 in a tax year — a threshold that hasn't changed since 1951.
SE Tax Rate Breakdown for 2026
| Component | Rate | Applies To | 2026 Cap |
|---|---|---|---|
| Social Security (OASDI) | 12.4% | Net SE earnings up to wage base | $176,100 |
| Medicare (HI) | 2.9% | All net SE earnings | No cap |
| Additional Medicare surtax | 0.9% | Net SE earnings over $200K (single) / $250K (MFJ) | No cap |
| Combined base rate | 15.3% | Up to $176,100 | — |
| Rate above $176,100 | 2.9% | Medicare only, no SS | — |
The 2026 Social Security wage base is $176,100. This means the 12.4% Social Security tax stops once your SE income (plus any wages from a W-2 job) reaches $176,100. The 2.9% Medicare tax has no ceiling.
The 92.35% Rule: Why You Don't Pay SE Tax on 100% of Your Income
When the IRS created the SE tax structure, it recognized that employees compute their half of FICA on a wage that already reflects the employer's deductibility of its FICA match. To put self-employed individuals on equal footing, the IRS allows you to multiply your net SE income by 0.9235 (92.35%) before applying the 15.3% rate.
This 0.9235 factor equals 1 minus 7.65% — it removes the employer-equivalent portion of the SE tax from the SE tax base, mirroring how an employee's wages are already reduced by the employer's share before the employee calculates their own FICA liability.
Worked Example: $75,000 Net Self-Employment Income
Let's calculate the full SE tax for a freelance graphic designer with $75,000 in net self-employment income (after all business deductions).
$75,000 × 0.9235 = $69,262.50
Step 2: Apply the 15.3% rate (entire amount is below $176,100 wage base)
Social Security (12.4%): $69,262.50 × 12.4% = $8,588.55
Medicare (2.9%): $69,262.50 × 2.9% = $2,008.61
Total SE Tax: $10,597.16
Step 3: Calculate the 50% SE tax deduction
$10,597.16 × 50% = $5,298.58 deducted from AGI
Step 4: Adjusted income for income tax purposes
$75,000 − $5,298.58 = $69,701.42 AGI before other deductions
So on $75,000 of self-employment income, you owe $10,597 in SE tax. Your effective SE tax rate on gross income is 14.1% (because of the 92.35% adjustment). After the 50% deduction, your income tax base is reduced, which partially offsets the SE tax burden.
The 50% SE Tax Deduction: How It Works
The self-employment tax deduction (officially "deduction for one-half of self-employment tax") mirrors the corporate world — when an employer pays FICA taxes for an employee, those payments are deductible business expenses. Self-employed individuals get the same treatment.
You deduct 50% of your SE tax from your gross income as an above-the-line adjustment on Schedule 1 (Form 1040, Part II). This means you take it whether or not you itemize. It reduces your adjusted gross income (AGI) and therefore your federal income tax — but it does not reduce the SE tax itself.
In the example above, the $5,299 deduction saves income tax at whatever bracket the filer is in. For someone in the 22% bracket, that's $5,299 × 22% = $1,166 of income tax savings, reducing the net SE tax burden from $10,597 to roughly $9,431 when combined.
Quarterly Estimated Tax Payments for 2026
Self-employed individuals must pay their tax liability — both SE tax and income tax — in advance through quarterly estimated payments. The IRS requires these payments if you expect to owe at least $1,000 in federal tax after withholding and refundable credits.
| Payment Period | Income Covered | Due Date |
|---|---|---|
| Q1 2026 | January 1 – March 31 | April 15, 2026 |
| Q2 2026 | April 1 – May 31 | June 16, 2026 |
| Q3 2026 | June 1 – August 31 | September 15, 2026 |
| Q4 2026 | September 1 – December 31 | January 15, 2027 |
How much to pay each quarter: Use the safe harbor rule to avoid underpayment penalties. Pay at least 100% of your prior year's tax liability (110% if your prior year AGI exceeded $150,000), or 90% of the current year's expected tax, whichever is smaller. Split this into four roughly equal payments.
Pay electronically via the IRS EFTPS system or through IRS Direct Pay. Checks can be submitted with Form 1040-ES vouchers. Late payments accrue an underpayment penalty currently calculated at the federal short-term rate plus 3 percentage points.
QBI Deduction (Section 199A): Up to 20% Off Your Taxable Income
The Qualified Business Income (QBI) deduction, introduced by the 2017 Tax Cuts and Jobs Act and made permanent, allows eligible self-employed individuals to deduct up to 20% of qualified business income from their taxable income. This deduction reduces income tax but not SE tax.
To claim the full 20% deduction, you must be under certain taxable income thresholds: $197,400 for single filers and $394,800 for married filing jointly in 2026. Above those thresholds, the deduction phases out for "specified service trade or businesses" (SSTBs) — including law, accounting, consulting, and financial services.
Non-SSTB businesses above the threshold face limitations based on W-2 wages paid and the unadjusted basis of depreciable assets. A self-employed individual with no employees and no significant assets may lose access to the full 20% deduction above the threshold.
For the freelancer with $75,000 in net SE income: QBI deduction = $69,701 (AGI after SE deduction) − $15,000 (standard deduction) = $54,701 taxable income × 20% = $10,940 QBI deduction, bringing taxable income down to roughly $43,761 before the deduction is applied.
5 Legal Ways to Reduce Self-Employment Tax
SE tax is often the largest surprise for new freelancers. Here are five legitimate strategies to reduce what you owe:
1. S-Corporation Election
The most powerful SE tax reduction strategy for high earners. By electing S-corp status, you pay yourself a "reasonable salary" (which is subject to FICA/payroll tax) and take the remaining profit as an owner distribution (which is not subject to SE tax). A freelancer earning $150,000 who pays themselves a $90,000 salary and takes $60,000 as distributions saves roughly $9,180 in SE tax annually. The S-corp carries administrative overhead (payroll system, quarterly filings, possibly higher accounting fees) so the math usually works above $50,000–$80,000 in net SE income.
2. SEP-IRA Contributions
Self-employed individuals can contribute up to 25% of net SE income to a SEP-IRA (or up to $70,000 for 2026, whichever is less). SEP-IRA contributions reduce your AGI dollar for dollar. A $15,000 SEP-IRA contribution reduces your income tax but not the SE tax itself — however, by reducing overall taxable income, it indirectly reduces your total tax burden substantially.
3. Self-Employed Health Insurance Deduction
If you pay for your own health, dental, and vision insurance (and your dependents' coverage), 100% of the premiums are deductible above the line as an adjustment to income. This reduces your AGI — and therefore your income tax. The deduction cannot exceed your net SE income and is not available for months when you're eligible for employer-sponsored coverage (including through a spouse's employer plan).
4. Home Office Deduction
If you use part of your home exclusively and regularly for business, you can deduct either $5 per square foot (simplified method, up to 300 sq ft = $1,500 max) or the actual percentage of home expenses (mortgage interest, rent, utilities, repairs) attributable to the business space. The regular-use requirement is strict — a spare bedroom that doubles as a guest room doesn't qualify.
5. Retirement Contributions (Solo 401k)
A Solo 401(k) — also called a one-participant 401(k) — allows higher contributions than a SEP-IRA for the same income because it permits both an employee deferral ($23,500 for 2026, plus $7,500 catch-up if 50+) and an employer contribution (up to 25% of net SE income), up to the $70,000 combined limit. Unlike a SEP-IRA, the Solo 401(k) also allows Roth deferrals (after-tax, growing tax-free) and loans against the balance.
Frequently Asked Questions
What is the self-employment tax rate for 2026?
The SE tax rate is 15.3%: 12.4% for Social Security on earnings up to the $176,100 wage base, plus 2.9% Medicare on all earnings with no cap. An additional 0.9% Medicare surtax applies on earnings over $200,000 (single) or $250,000 (MFJ).
Does self-employment tax replace income tax?
No. SE tax and federal income tax are separate obligations. SE tax covers your Social Security and Medicare contributions. You still owe income tax on your net self-employment income after all deductions. Both are calculated on your annual Form 1040 and paid through quarterly estimated payments.
What is the SE tax deduction?
You can deduct 50% of your SE tax as an above-the-line adjustment on Form 1040 Schedule 1. This deduction reduces your AGI and therefore your income tax. It does not reduce the SE tax itself. For $10,597 in SE tax, the deduction is $5,299, saving a 22% bracket filer roughly $1,166 in income tax.
How do I pay self-employment tax?
SE tax is paid through quarterly estimated payments. 2026 due dates: April 15 (Q1), June 16 (Q2), September 15 (Q3), and January 15, 2027 (Q4). Pay via IRS Direct Pay, EFTPS, or Form 1040-ES by mail. Underpaying by more than $1,000 triggers an underpayment penalty.
What is the 2026 Social Security wage base?
The 2026 Social Security wage base is $176,100. The 12.4% SS portion of SE tax applies only to net earnings up to this threshold. Above $176,100, only the 2.9% Medicare tax continues. The SSA announces any changes to the wage base each October using the National Average Wage Index.
Calculate Your 2026 Self-Employment Tax
Enter your estimated net self-employment income to see your SE tax, the 50% deduction, and your total estimated tax burden including federal income tax.
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