What Is a Net Loss?

A net loss occurs when a business's allowable expenses exceed its business income for a period. On Schedule C, the loss generally appears when deductible expenses are greater than gross income. A reported loss may reduce other taxable income, carry forward, or be limited—but the Schedule C result alone does not determine how much is deductible this year.

How is a net loss calculated?

A Schedule C business generally reports gross receipts, returns and allowances, cost of goods sold, other income, and allowable expenses. If the final result is below zero, Schedule C reports a net loss.

Assume a new design business has:

• $40,000 of gross receipts;
• $12,000 of cost of goods sold; and
• $43,000 of other allowable business expenses.

The simplified result is: $40,000 − $12,000 − $43,000 = $15,000 net loss.

That calculation does not yet answer whether the entire $15,000 offsets wages or other income. The taxpayer must consider whether the activity is truly conducted for profit and whether basis, at-risk, passive-activity, excess-business-loss, or other limitations apply.

Can a net loss reduce other income?

A genuine nonpassive sole-proprietor loss may generally reduce other income on an individual return, subject to the tax rules. However, the review can involve several layers:

1. Business or hobby: The activity must be conducted with a genuine profit objective and sufficient continuity and regularity. A hobby loss cannot be used in the same way as a business loss.
2. Deductibility and substantiation: Costs must satisfy the applicable deduction rule and be supported.
3. Basis: Owners of partnerships and S corporations generally cannot deduct losses beyond available basis.
4. At-risk rules: A loss may be limited to amounts the taxpayer has economically at risk.
5. Passive-activity rules: Losses from activities in which the taxpayer does not materially participate may generally be limited to passive income.
6. Excess-business-loss rule: A noncorporate taxpayer's aggregate business losses can be limited under Section 461(l). The federal disallowed amount is generally treated as a net operating loss carryover.
7. Net operating loss rules: After the full return is calculated, a net operating loss may exist and follow separate carryforward or carryback rules.

These rules do not all apply to every Schedule C filer, but they explain why "my business lost $15,000" is not enough information to determine the tax benefit.

Where does a Schedule C loss appear?

For 2025, Schedule C line 31 reports net profit or loss. The amount generally flows to Schedule 1, line 3, and then into Form 1040 income.

If the return is subject to the federal excess-business-loss limit, Form 461 calculates the limitation. Other forms may apply for at-risk, passive-activity, basis, or net-operating-loss calculations.

A Schedule C loss can also affect self-employment earnings. It may reduce combined qualifying net earnings from other self-employed activities, but the Schedule SE instructions and special rules control that calculation.

Net loss vs. net operating loss and negative cash flow

A net loss can describe the negative result of one business or statement.

A net operating loss is a tax-law calculation based on the taxpayer's broader return after required modifications. A Schedule C loss does not automatically equal an NOL.

Negative cash flow means more cash left than entered during a period. Loan payments, equipment purchases, owner withdrawals, borrowing, accounts receivable, and depreciation can make cash flow and tax profit move differently.

Federal and California treatment

California residents generally carry federal business income or loss into Form 540 and Schedule CA, then adjust for state differences. California has its own excess-business-loss computation on Form FTB 3461 and does not conform to every federal amendment or extension affecting Section 461(l).

For 2025, California's Form FTB 3461 instructions use a state-specific threshold and treat a disallowed excess business loss as a California excess-business-loss carryover rather than automatically following the federal NOL treatment.

California also has a temporary NOL deduction suspension for certain taxpayers for tax years beginning in 2024 through 2026. Taxpayers below the applicable $1 million income measure and certain disaster-loss taxpayers are generally excepted. This rule is separate from whether the business generated a current-year loss.

Common mistakes

• Assuming every loss immediately offsets W-2 wages
• Calling an activity a business without documenting a profit objective
• Deducting personal or startup costs under the wrong rules
• Ignoring basis, at-risk, passive, or excess-business-loss limitations
• Treating a Schedule C loss as automatically equal to an NOL
• Failing to maintain carryover schedules
• Applying the federal loss result to California without checking state differences
• Reporting recurring losses without documenting businesslike efforts to improve profitability

Frequently asked questions

Related terms

• Net Profit (Net Income)
• Schedule C
• Business Expense
• Gross Receipts

Official sources

• IRS — About Schedule C (Form 1040)
• IRS — Excess business losses
• IRS — About Form 461
• IRS — Hobby or business
• California FTB — 2025 Form FTB 3461 instructions
• California FTB — Net operating loss suspension

The definitions and examples on this page are for informational purposes only and do not constitute tax advice. Tax laws change frequently and individual circumstances vary. Consult a qualified tax professional before making decisions based on this content.