29 — Tentative Profit or Loss Updated for tax year 2025

What this line means

Line 7 (gross income) minus line 28 (total expenses). This is your profit or loss before the business use of home deduction. If the number is positive, you have a tentative profit. If negative, you have a tentative loss. The home office deduction (line 30) is subtracted next to arrive at net profit or loss on line 31.

Does this apply to you?

• Every Schedule C filer completes this line — it is a calculated field
• Tax software fills this in automatically
• This is an intermediate calculation, not a final result

Easy to overlook

A tentative profit does not mean you owe tax on this amount Line 29 is not your final taxable business income. The home office deduction (line 30) still needs to be subtracted. If you work from home and qualify for the home office deduction, your actual net profit will be lower than this number. ¹ [SOURCE: IRS Schedule C instructions — Line 29]

The home office deduction cannot create or increase a loss If line 29 is already a loss, you cannot use the home office deduction to make it a bigger loss. If line 29 shows a small profit, you can use the home office deduction only up to that amount. Any unused home office deduction carries forward to the next year. This is why line 29 exists as a separate calculation — it caps the home office deduction. ² [SOURCE: General filing pattern — premature estimated tax calculations]

Watch out for this

Using this number instead of line 31 for estimated tax payments or financial planning. Line 29 does not include the home office deduction. If you have a home office, use line 31 (net profit) as your starting point for all tax and financial calculations.

Related lines on your return

• Line 7 — Schedule C — Gross income; the revenue side of this calculation
• Line 28 — Schedule C — Total expenses; subtracted from gross income
• Line 30 — Schedule C — Business use of home; subtracted next
• Line 31 — Schedule C — Net profit or loss; the final number