How to fill out Schedule SE, line by line
Schedule SE (Form 1040) is the 2025 attachment that figures self-employment tax and the deduction for one-half of that tax. Start by identifying the income route that applies to you, then follow the connected line groups rather than treating each line as a separate question. Keep your Schedule C, Schedule F, Schedule K-1, W-2, and any optional-method records nearby.
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Schedule SE: what it calculates and which route to start with
Attach Schedule SE to Form 1040, 1040-SR, 1040-SS, or 1040-NR when it applies. In the usual case, you file it when line 4c is $400 or more. Qualifying church employee income of $108.28 or more is a separate filing trigger. On a joint return, use the name and Social Security number of the spouse with the self-employment income; if both spouses have that income, each spouse completes a separate Schedule SE.
Start with the filing threshold and the four routes
Ordinary farm or nonfarm route: use lines 1a through 4c, then continue through line 13 if the form tells you to do so.
Church-only route: skip lines 1 through 4b, enter zero on line 4c, and begin at line 5a if church employee income is your only income subject to self-employment tax.
Optional-method route: if you meet the farm or nonfarm conditions in Part II, lines 15 and 17 feed into line 4b.
Special-status route: approved exemptions and certain international or other specialist situations can change whether Schedule SE is filed at all.
Special situations that need the IRS instructions
Line A is not a general clergy checkbox. Check it only if you are a minister, member of a religious order, or Christian Science practitioner; you filed Form 4361 and received IRS approval; and you had $400 or more of other net earnings from self-employment. Then continue with Part I. If approved Form 4361 applies and you have no other income subject to self-employment tax, the IRS instead directs you to Schedule 2 (Form 1040), line 4.
Pause before using the ordinary route
Do not resolve an approved Form 4029 or Form 4361 situation, an international social-security agreement, community income, bankruptcy, or special partnership facts from a general walkthrough. Use the named IRS instruction section or required form. For example, an applicable international coverage statement can mean you do not complete Schedule SE.
Part I lines 1a–6: enter and combine self-employment earnings
Part I first turns the applicable farm, nonfarm, optional-method, and church employee amounts into one line-6 amount. The source form matters: Schedule SE does not recalculate your Schedule C or Schedule F profit. It uses the specified result and applies its own self-employment-tax calculation.
Lines 1a–4c: ordinary farm and nonfarm earnings
Line 1a is for net farm profit or loss from Schedule F, line 34, plus applicable farm-partnership Schedule K-1 (Form 1065) box 14, code A. Line 2 is for net nonfarm profit or loss from Schedule C, line 31, plus applicable nonfarm K-1 box 14, code A. A Schedule C amount is not automatically a line-2 amount: statutory employee profit or loss from Schedule C line 31 is excluded from line 2. The detailed rules for other income categories, ministers, and partnership adjustments remain in the IRS instructions.
Line 1b is narrower than line 1a. Enter taxable Conservation Reserve Program payments in parentheses only if you were receiving Social Security retirement or disability benefits when you received the payments. The form identifies Schedule F line 4b or K-1 box 20, code AQ as the source. It is a subtraction, not a second farm-income entry.
Line 3: combine lines 1a, 1b, and 2.
Line 4a: if line 3 is positive, multiply it by 92.35% (0.9235). If it is zero or negative, enter the line-3 amount instead.
Line 4b: enter the total of lines 15 and 17 only if you elect one or both Part II optional methods.
Line 4c: add lines 4a and 4b. If it is less than $400, stop because no self-employment tax is owed—unless you had church employee income, in which case enter zero and continue.
CRP payments can change the usual stop rule
There is a special CRP filing rule. If both lines 4a and 4c are below $400 because of line 1b, combine lines 1a and 2. If that result is $434 or more, file Schedule SE through line 4c and enter zero on Schedule 2, line 4. If it is below $434, do not file Schedule SE unless you elect an optional method.
Lines 5a–6: church employee income
Qualifying church employee income follows a separate path because it is entered from Form W-2 on line 5a, not combined with ordinary nonfarm profit at line 2. For this purpose, church employee income means wages received as an employee of a church or qualified church-controlled organization that has the required exemption certificate in effect. Services as a minister, member of a religious order, or Christian Science practitioner are not church employee income for this route.
For line 5b, multiply line 5a by 92.35%; if the result is less than $100, enter zero. Line 6 then adds line 4c and line 5b. If church employee income is your only income subject to self-employment tax, skip lines 1 through 4b, enter zero on line 4c, and begin here. Line 6 is the amount used in the remaining Schedule SE tax calculation.
Part I lines 7–13: calculate the tax and report the results
Lines 7 through 13 use line 6 to calculate two different components: a wage-limited Social Security component and a separate Medicare component. The fact that wages have already used the Social Security maximum does not eliminate the Medicare calculation.
Lines 7–11: apply the wage offset and calculate both components
Line 7 is $176,100, the 2025 maximum for combined wages and self-employment earnings subject to Social Security tax. Enter Social Security wages and tips from Form W-2 boxes 3 and 7, plus railroad retirement tier 1 compensation, on line 8a. Lines 8b and 8c take the specified Form 4137 and Form 8919 amounts, and line 8d adds them. Subtract line 8d from line 7 at line 9. If line 8a is already $176,100 or more, skip lines 8b through 10 and go to line 11; if line 9 is zero or less, enter zero on lines 9 and 10.
How lines 10 through 13 turn line 6 into tax and a deduction
Line(s) | Calculation | Where it goes |
|---|---|---|
10 | Smaller of line 6 or line 9 × 12.4% | Part of line 12 |
11 | Line 6 × 2.9% | Part of line 12 |
12-13 | Line 12 = lines 10 + 11; line 13 = 50% of line 12 | Line 12 to Schedule 2 line 4 or Form 1040-SS Part I line 3; line 13 to Schedule 1 line 15 |
Line 10 applies the 12.4% rate only to the remaining Social Security base. Line 11 is different: multiply all of line 6 by 2.9%. Then add lines 10 and 11 for total self-employment tax on line 12. This is why reaching the line-7 maximum may reduce line 10 to zero but does not mean you skip line 11.
Lines 12–13: transfer tax and deduction
Line 12 is the self-employment-tax result. Transfer it to Schedule 2 (Form 1040), line 4, or to Form 1040-SS, Part I, line 3. Line 13 is a separate result: it is 50% of line 12 and is the deduction for one-half of self-employment tax. Transfer line 13 to Schedule 1 (Form 1040), line 15. If you file Form 1040-SS, skip line 13.
Part II lines 14–17: when optional methods can change net earnings
Part II is optional, not a routine continuation of Part I. Its farm and nonfarm methods have different eligibility tests, but both create an amount that returns to Part I line 4b. Eligibility alone does not mean an election is better for every filer.
Farm and nonfarm optional methods at a glance
Method | Eligibility | Amount entered |
|---|---|---|
Farm: lines 14–15 | Gross farm income of $10,860 or less, or net farm profits below $7,840 | Line 15: smaller of two-thirds of gross farm income, not below zero, or $7,240 |
Nonfarm: lines 16–17 | Net nonfarm profits below $7,840 and below 72.189% of gross nonfarm income; $400 of net SE earnings in two of the prior three years; no more than five uses | Line 17: smaller of two-thirds of gross nonfarm income, not below zero, or line 16 |
Farm optional method: lines 14–15
Line 14 is the $7,240 maximum income for optional methods. You may use the farm method when gross farm income is $10,860 or less or net farm profits are below $7,840. At line 15, enter the smaller of two-thirds of gross farm income, not below zero, or $7,240. There is no limit on how many years you can use the farm method. Farm gross income comes from Schedule F line 9 and applicable K-1 box 14, code B; the form’s footnotes identify the net-profit sources used for the eligibility test.
Nonfarm optional method: lines 16–17
The nonfarm method requires more than a low current-year profit. You must meet both current-year comparisons, have at least $400 of actual net earnings from self-employment in two of the prior three years, and stay within the five-use limit. Subtract line 15 from line 14 to get line 16. The line-17 amount also cannot be less than your actual net earnings from nonfarm self-employment. If you use both methods, the combined optional-method earnings cannot exceed $7,240 and cannot be below actual nonfarm earnings alone.
Part II changes the Part I calculation
If you elect either method, add lines 15 and 17 and transfer the total to line 4b. The IRS explains that optional methods can affect Social Security coverage, earned-income-related credits, the self-employed health-insurance deduction, AGI-sensitive items, and self-employment tax. Compare the applicable official calculations rather than assuming an available method is automatically beneficial. A filed method can be changed by filing Form 1040-X.
After Schedule SE: related transfers and Additional Medicare Tax
Schedule SE line 12 and line 13 have the separate destinations described above. Additional Medicare Tax is also separate from line 12: do not add 0.9% to Schedule SE yourself. When the applicable threshold situation applies, use Form 8959.
When Schedule SE line 6 leads to Form 8959
Form 8959, Part II starts with Schedule SE Part I, line 6 on its line 8; if there is a loss, Form 8959 directs you to enter zero. The relevant threshold depends on filing status. If you also have wages, wages subject to Additional Medicare Tax reduce the threshold available for self-employment income, but not below zero. Form 8959—not Schedule SE—does the full calculation and reports its total on Schedule 2, line 11.
Form 8959 threshold amounts by filing status
Filing status | Threshold |
|---|---|
Married filing jointly | $250,000 |
Married filing separately | $125,000 |
Single, head of household, or qualifying surviving spouse | $200,000 |
Sources and how this page was made
This guide explains the official sources listed below in plain language. Displayed amounts, limits, percentages, and timing rules come from that material.
Source revision reflected in this guide: Form: 2025; Instructions: 2025.