Schedule SE is the IRS form self-employed people use to calculate self-employment tax, the combined 15.3% Social Security and Medicare tax on net earnings from a trade or business. If you cleared $400 or more in net self-employment income during the year, you file Schedule SE with your Form 1040, the tax it computes is added to your income tax, and half of it comes back off your income as a deduction on Schedule 1.
Who Has to File Schedule SE
The threshold is low. Net earnings from self-employment of $400 or more triggers the filing requirement.1Internal Revenue Service. Topic No. 554, Self-Employment Tax A separate rule applies if you had church employee income of $108.28 or more.2Internal Revenue Service. Instructions for Schedule SE (Form 1040)
Net earnings means your gross business income minus your allowable business deductions. The income typically comes from one of three places:
- Sole proprietor or single-member LLC income, reported on Schedule C. This is the most common route to Schedule SE.
- Partnership income received as a general partner: your distributive share plus any guaranteed payments. Limited partners include only guaranteed payments for services they performed.3Internal Revenue Service. Entities 1
- Freelance, contractor, and gig income where you aren’t classified as an employee.
Some income that lands on your return doesn’t belong on Schedule SE at all. Dividends, capital gains, most rental income, and interest are treated as passive and stay off the form. Wages you draw as an S corporation shareholder-employee also stay off, because the S corp withholds FICA on those wages the same way any other employer would.4Internal Revenue Service. S Corporation Employees, Shareholders and Corporate Officers
Ministers, members of religious orders who haven’t taken a vow of poverty, and Christian Science practitioners can apply for an exemption from self-employment tax on ministerial earnings by filing Form 4361. The exemption rests on religious grounds and forfeits Social Security coverage on that income.5Internal Revenue Service. About Form 4361, Application for Exemption From Self-Employment Tax for Use By Ministers, Members of Religious Orders and Christian Science Practitioners
How the Calculation Works
The 15.3% rate breaks into two pieces: 12.4% for Social Security and 2.9% for Medicare. That matches the combined employer-and-employee FICA rate a W-2 worker and their employer split. When you work for yourself, you cover both halves.6Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes)7Internal Revenue Service. Topic No. 751, Social Security and Medicare Withholding Rates
You don’t apply that rate directly to your net profit. Schedule SE first multiplies your net earnings by 92.35% to produce the amount subject to the tax.1Internal Revenue Service. Topic No. 554, Self-Employment Tax The adjustment puts the self-employed base roughly in line with what a W-2 employee’s wages look like after the employer’s share of FICA is removed.
A quick worked example. Say Schedule C shows net profit of $80,000. Multiply by 0.9235 to get $73,880. Apply 15.3% to that, and self-employment tax works out to about $11,304.
Two ceilings and one floor shift that math for higher and lower earners:
- The 12.4% Social Security portion only applies up to the annual wage base. For 2026 that limit is $184,500, and it includes any W-2 wages you earned during the year. Once combined wages and adjusted self-employment earnings exceed the cap, the 12.4% stops.8Social Security Administration. Contribution and Benefit Base
- The 2.9% Medicare portion has no cap.
- An additional 0.9% Medicare tax applies to self-employment income above $200,000 for single filers and $250,000 for joint filers.9Internal Revenue Service. Topic No. 560, Additional Medicare Tax
After Schedule SE produces the total, you deduct half of it on Schedule 1 (Form 1040), line 15. That deduction reduces your adjusted gross income, not your self-employment tax.10Internal Revenue Service. Schedule SE (Form 1040) – Self-Employment Tax11Internal Revenue Service. Schedule 1 (Form 1040) In the $80,000 example, that’s a deduction of roughly $5,652 against the income your regular tax bracket applies to.
How Schedule SE Fits With Your Other Forms
Schedule SE pulls numbers in and pushes numbers out. On the way in, sole proprietors bring the net profit line from Schedule C.12Internal Revenue Service. About Schedule C (Form 1040), Profit or Loss from Business (Sole Proprietorship) Partners bring the self-employment earnings reported on Schedule K-1 (Form 1065), with general partners including distributive share and guaranteed payments and limited partners including only guaranteed payments for services.13Internal Revenue Service. Partner’s Instructions for Schedule K-1 (Form 1065)
On the way out, the full self-employment tax is added to your Form 1040 tax owed, while the deductible half flows to Schedule 1 and reduces your AGI. A mistake on Schedule C or a misread K-1 carries straight through, so those upstream numbers are worth double-checking before you touch Schedule SE.
Paying Self-Employment Tax During the Year
Filing Schedule SE settles the accounting, but the IRS expects the money along the way. Self-employed filers generally pay quarterly estimated tax using Form 1040-ES, and those payments cover both income tax and self-employment tax together.14Internal Revenue Service. Estimated Taxes
The 2026 due dates:15Internal Revenue Service. Estimated Tax
- April 15, 2026, for income earned January through March.
- June 15, 2026, for April and May.
- September 15, 2026, for June through August.
- January 15, 2027, for September through December. You can skip this one if you file the full return and pay the balance by January 31.
Deadlines that fall on a weekend or federal holiday move to the next business day.
The underpayment penalty is what you’re trying to avoid. You generally sidestep it if any one of these is true: your total tax after withholding and refundable credits comes to less than $1,000; you paid at least 90% of the current year’s tax; or you paid 100% of last year’s tax liability (whichever of those last two is smaller).16Internal Revenue Service. Topic No. 306, Penalty for Underpayment of Estimated Tax For a first-year freelancer with no prior tax liability, the 100%-of-last-year rule is often the easiest safe harbor to hit.
What the Tax Buys
The money isn’t a sunk cost. Self-employment tax funds your own future Social Security and Medicare benefits, and paying it earns work credits. In 2026, one credit is granted for every $1,890 of covered earnings, capped at four credits per year (which takes $7,560 in earnings). Most people need 40 credits to qualify for Social Security retirement benefits.17Social Security Administration. Social Security Credits and Benefit Eligibility Higher reported lifetime earnings generally translate into a higher benefit later, which is a practical reason to file Schedule SE accurately every year rather than underreport.
A Few Things That Trip People Up
Schedule S Is Not Schedule SE
Search results sometimes surface “Schedule S,” which is a different form used with Form 1040-NR by nonresident aliens. Self-employment tax lives on Schedule SE.18Internal Revenue Service. About Schedule SE (Form 1040), Self-Employment Tax
Self-Employment Tax Doesn’t Replace Income Tax
Your net business profit is subject to self-employment tax on Schedule SE and, separately, to regular federal income tax through Form 1040. You owe both. The half-of-SE-tax deduction on Schedule 1 softens the total, but the two obligations don’t merge.
S Corporation Owners
If you own and work for an S corporation, the W-2 wages the corporation pays you already have FICA withheld and don’t go on Schedule SE. Distributions above a reasonable salary also aren’t subject to self-employment tax, which is a reason some owners choose the S corp structure.4Internal Revenue Service. S Corporation Employees, Shareholders and Corporate Officers