What this line means
The sum of lines 1a, 1b, and 2. This is your total net self-employment earnings from all sources — farm and nonfarm — before the 92.35% adjustment. If you have only nonfarm income (which is most self-employed filers), line 3 equals line 2. This total determines whether you meet the $400 threshold for owing self-employment tax.
Does this apply to you?
- You have net earnings from any self-employment activity reported on Schedule C or Schedule F
- You received self-employment income from partnerships via Schedule K-1
- You have both farm and nonfarm self-employment income that needs to be combined
- You need to determine whether your total SE earnings reach the $400 filing threshold
Easy to overlook
The $400 threshold applies to combined earnings, not individual businesses If you run two businesses — one with $300 profit and one with $200 profit — your combined earnings are $500 and you owe SE tax, even though neither business alone reached $400. Conversely, a $500 profit from one business and a $200 loss from another produces $300 in combined earnings, which is below the threshold. The SE tax calculation looks at the total, not each source individually. 1 IRS Schedule SE instructions — Line 3
Farm losses offset nonfarm income for SE tax purposes A farm loss on line 1a reduces your combined earnings. If you have $60,000 in Schedule C nonfarm profit and a $15,000 farm loss on Schedule F, your combined earnings on line 3 are $45,000. Some filers treat farm and nonfarm SE income as separate calculations, but they are combined on this single line before the 92.35% multiplier is applied. 2 General filing pattern — farm and nonfarm income combined incorrectly
Watch out for this
Skipping Schedule SE entirely because one business had a loss. Even if your farm operation lost money, your nonfarm Schedule C profit still triggers SE tax if combined net earnings exceed $400. The SE tax obligation depends on line 3, not on any individual business result.
Footnotes
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IRS Schedule SE (Form 1040) Instructions, Line 3. https://www.irs.gov/instructions/i1040sse ↩
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IRS Schedule SE (Form 1040) Instructions, Combining Farm and Nonfarm Income. https://www.irs.gov/instructions/i1040sse ↩