Tax Forms & Schedules
Schedule SE Explained: The Self-Employment Tax Form
Schedule SE is the IRS form that calculates self-employment tax, the 15.3% Social Security and Medicare levy that self-employed people owe on their net earnings. You attach it to Form 1040 if your net earnings from self-employment reach $400 in the tax year. The form takes your business profit, multiplies it by 92.35%, applies the 15.3% rate up to the annual Social Security wage base, and then calculates the deduction for half your tax. This guide walks the form line by line and works two full examples for 2026.
What Schedule SE is and who files it
Schedule SE (Form 1040) figures the tax on net earnings from self-employment. You must file it if those net earnings are $400 or more for the year, a threshold that applies regardless of age and even if you already collect Social Security or Medicare. Church employees with $108.28 or more in wages follow a separate rule.
Net earnings from self-employment usually come from Schedule C (line 31) for sole proprietors and single-member LLCs, from Schedule F for farmers, or from a partnership Schedule K-1 (box 14, code A). The Social Security Administration uses the figures reported here to credit your earnings record, which later determines your retirement and disability benefits.
W-2 wages do not go on Schedule SE. Your employer already withholds and matches Social Security and Medicare on those. Schedule SE exists because a self-employed person is both employer and employee, and so owes both halves of the payroll tax.
The 15.3% self-employment tax rate
Self-employment tax is 15.3% of net self-employment earnings: 12.4% for Social Security and 2.9% for Medicare. This equals the combined employer and employee share of FICA that a wage earner and their employer split. Because you are both parties, you pay the whole amount yourself.
The 12.4% Social Security portion applies only up to an annual cap called the wage base. For 2026 that cap is $184,500 (up from $176,100 in 2025). Net earnings above the cap owe no more Social Security tax, so the maximum Social Security piece for 2026 is $184,500 x 12.4% = $22,878.
The 2.9% Medicare portion has no cap. It applies to every dollar of net self-employment earnings. High earners may also owe an extra 0.9% Additional Medicare Tax above certain income thresholds, but that is figured on Form 8959, not on Schedule SE.
Why the 92.35% factor exists
Schedule SE does not apply the 15.3% rate to your full profit. It first multiplies net earnings by 92.35%, and only the result is subject to tax. The 92.35% factor equals 1 minus 7.65%, and 7.65% is the employer-equivalent half of the combined FICA rate.
The adjustment puts a self-employed person on roughly the same footing as an employee. An employee’s Social Security and Medicare tax is calculated on wages after the employer’s matching share is set aside, because the employer’s half is not part of the worker’s taxable wage. The 92.35% step mirrors that treatment for the self-employed.
The practical effect: only 92.35 cents of every dollar of profit gets hit with the 15.3% rate. On $100,000 of net earnings, the taxable base is $92,350 rather than the full $100,000.
Schedule SE line by line
Schedule SE has two parts. Part I calculates the tax for most filers. Part II covers optional methods for very low or negative earnings. The core Part I flow is short.
- Line 2: Enter net profit from Schedule C line 31 (or Schedule F, or partnership K-1 box 14a).
- Line 3: Combine the amounts, subtracting any allowable reductions such as the Conservation Reserve Program payments line.
- Line 4a: Multiply line 3 by 92.35%. If the result is under $400, you generally owe no self-employment tax.
- Line 6: The taxable base carries down to here after any optional-method or church-wage additions.
- Line 8a to 8d: Enter any W-2 Social Security wages here. These reduce the earnings still subject to the 12.4% Social Security portion, so you are not taxed twice past the wage base.
- Line 10: Apply 12.4% to the Social Security portion (capped at the wage base).
- Line 11: Apply 2.9% Medicare to the full line 6 amount.
- Line 12: Add lines 10 and 11. This is your total self-employment tax, which flows to Schedule 2 (Form 1040).
- Line 13: Multiply line 12 by 50%. This is the deductible half, which flows to Schedule 1 (Form 1040).
The deduction for half your self-employment tax
You may deduct one-half of your self-employment tax as an above-the-line adjustment to income. Schedule SE line 13 computes it, and it lands on Schedule 1 (Form 1040), reducing your adjusted gross income (AGI). You take it whether or not you itemize.
This deduction represents the employer-equivalent share of the tax. An employer’s payroll tax is a deductible business cost, so the code gives the self-employed a parallel benefit. It lowers income tax, not the self-employment tax itself: the full 15.3% still funds Social Security and Medicare.
On $14,129.55 of self-employment tax, the deduction is $7,064.78. At a 22% marginal income tax rate, that trims federal income tax by roughly $1,554. The mechanism matters because it interacts with other AGI-based items, including the Section 199A QBI deduction.
Worked example: 2026 self-employment tax
The table works two cases for 2026: a profit below the $184,500 Social Security wage base, and one above it where the 12.4% portion caps out and only Medicare continues.
| Step | Below the cap | Above the cap |
|---|---|---|
| Net profit (Schedule C line 31) | $100,000 | $250,000 |
| x 92.35% (Schedule SE line 4a / 6) | $92,350.00 | $230,875.00 |
| Social Security base (lesser of above or $184,500) | $92,350.00 | $184,500.00 |
| Social Security tax at 12.4% (line 10) | $11,451.40 | $22,878.00 |
| Medicare base (full line 6 amount) | $92,350.00 | $230,875.00 |
| Medicare tax at 2.9% (line 11) | $2,678.15 | $6,695.38 |
| Total SE tax (line 12) | $14,129.55 | $29,573.38 |
| Deductible half (line 13, to Schedule 1) | $7,064.78 | $14,786.69 |
In the below-cap case, the whole $92,350 gets the full 15.3%, so the tax is simply $92,350 x 15.3% = $14,129.55. In the above-cap case, Social Security stops at $22,878 while Medicare keeps running at 2.9% on the entire $230,875, which is why the two portions must be figured separately once earnings pass the wage base.
Optional methods and multiple businesses
Part II lets some filers report higher earnings than a strict calculation would. Under the nonfarm optional method for 2026, you may qualify if net nonfarm profit was under $7,493 and less than 72.189% of gross nonfarm income, and you had $400 or more of self-employment earnings in 2 of the prior 3 years. You can use it no more than five times.
People choose an optional method to keep earning Social Security credits in a low-income or loss year, since a small tax paid now can preserve future benefit eligibility. It can raise the current-year tax, so the trade-off depends on your benefit picture.
If you run more than one business, you combine the net results on a single Schedule SE rather than filing one per business. A loss in one activity can offset a profit in another before the 92.35% step. Spouses who each have self-employment income file separate Schedule SE forms.
How Schedule SE connects to the rest of your return
Schedule SE does not stand alone. Its total (line 12) flows to Schedule 2, its deduction (line 13) flows to Schedule 1, and its net earnings feed the self-employment tax picture and your Social Security record. The profit that starts the whole chain comes from your business return.
Because no one withholds this tax for you, self-employment tax is a common driver of estimated tax payments. Many self-employed filers underpay in year one because they budget for income tax but forget the extra 15.3%. Income reported on a 1099-NEC is a signal that Schedule SE will likely apply.
Frequently asked questions
Who has to file Schedule SE?
Anyone whose net earnings from self-employment are $400 or more for the year must file Schedule SE with Form 1040. This includes sole proprietors, single-member LLC owners, independent contractors, freelancers, and general partners. The rule applies at any age and even if you already receive Social Security or Medicare. Church employees use a separate $108.28 threshold.
How is self-employment tax calculated on Schedule SE?
Multiply your net self-employment profit by 92.35% to get the taxable base. Apply 12.4% for Social Security on that base up to $184,500 for 2026, and 2.9% for Medicare on the entire base with no cap. Add the two for total self-employment tax. The combined rate is 15.3% until earnings pass the Social Security wage base.
Why does Schedule SE multiply earnings by 92.35%?
The 92.35% factor equals 1 minus 7.65%, the employer-equivalent half of the FICA rate. Employees are not taxed on their employer’s matching share, so the code gives the self-employed the same treatment by removing that share before applying the tax. The result is that only 92.35 cents of each profit dollar face the 15.3% rate.
Can I deduct self-employment tax?
You can deduct one-half of your self-employment tax as an above-the-line adjustment on Schedule 1 (Form 1040), and it lowers your adjusted gross income whether or not you itemize. Schedule SE line 13 calculates it. The deduction reduces income tax only; the full 15.3% still funds Social Security and Medicare.
What is the maximum Social Security portion for 2026?
The 12.4% Social Security portion applies only to net earnings up to the 2026 wage base of $184,500, so the maximum is $184,500 x 12.4% = $22,878. Earnings above the cap owe no additional Social Security tax. The 2.9% Medicare portion has no cap and continues on every dollar of net self-employment earnings.
Do I still pay if I already have a W-2 job?
You may owe less. W-2 Social Security wages count against the $184,500 cap, so lines 8a to 8d of Schedule SE reduce the earnings still subject to the 12.4% portion. This prevents double taxation past the wage base. Medicare at 2.9% still applies to your full self-employment earnings regardless of W-2 wages.
Reviewed by The Ledgerism Editorial Team. Last reviewed: July 2026.