Schedule C Income for EA Candidates: Telling a Business From a Hobby and Surviving an Audit

The Thesis

The line between a hobby and a Schedule C business is one of the most consequential distinctions in individual taxation. A business reports income and expenses on Schedule C, deducts ordinary and necessary expenses, computes self-employment tax on the net, and may generate a deductible loss against other income. A hobby reports gross income on Schedule 1 line 8j and, since the Tax Cuts and Jobs Act through 2025, deducts no expenses for federal purposes.

EAs are tested on the distinction because misclassification has cascading effects: payroll tax exposure, qualified business income deduction availability, retirement plan contributions, audit risk, and even the validity of the home office deduction. The IRS uses a nine-factor analysis under Section 183 that the EA exam tests through fact patterns.

The Decision Map

The first question is not the nine factors. The first question is whether the activity even rises to a trade or business under the basic test from Higgins and later cases: continuity, regularity, and the primary purpose of income or profit. Sporadic activity rarely qualifies as a trade or business regardless of intent.

The Section 183 Nine Factors

When the activity has continuity and regularity but the profit motive is unclear, Treasury Regulation 1.183-2(b) lists nine factors. No single factor is determinative, and the IRS weighs them together.

1. Manner in which the activity is conducted: separate books, business plan, marketing.
2. Expertise of the taxpayer or advisors.
3. Time and effort devoted to the activity.
4. Expectation that assets used will appreciate.
5. Success in other similar activities.
6. History of income or losses from the activity.
7. Amount of occasional profits earned.
8. Financial status of the taxpayer.
9. Elements of personal pleasure or recreation.

EAs should recognize the safe harbor in Section 183(d): if the activity is profitable in three of the last five years (two of seven for horse breeding), there is a presumption that it is a trade or business.

Worked Example: The Etsy Seller

Maya sells hand-thrown ceramics. In 2023 she made 800 dollars and spent 2,400 dollars on supplies, kiln rental, and listing fees. In 2024 she made 3,200 dollars and spent 4,100 dollars. In 2025 she made 9,800 dollars and spent 6,200 dollars. She maintains a separate bank account, uses inventory software, attends two craft fairs a year, and intends to grow the activity into a full-time business after retiring from her day job in 2027.

Analysis:

• Continuity and regularity: yes, three years of sustained activity.
• Profit motive: she has not yet been profitable, but the trend is improving and she has a written business plan.
• Section 183 factors weighing toward business: separate books, marketing, business plan, increasing revenue.
• Factors weighing toward hobby: persistent losses, personal pleasure element.

On the EA exam, this is a Schedule C activity because the conduct is business-like even if profit has not yet materialized. The 2025 net loss of approximately 0 dollars (when inventory is properly capitalized she may show a smaller loss) is deductible. A persistent pattern of large losses with no improvement and no documented plan would shift the analysis.

Worked Example: The Weekend Photographer

Brian photographs three weddings a year. He earns about 4,500 dollars annually and treats it as fun. He has no website, no business cards, no separate bank account, and rejects clients who want the work to feel businesslike. He files Schedule C and deducts his camera, travel, and computer.

Analysis:

• Continuity: marginal, three weddings a year.
• Profit motive: weak. Personal pleasure is the stated motivation.
• Section 183 factors: minimal business-like conduct, no growth, mostly personal pleasure.

This is likely a hobby. Schedule C reporting is incorrect. The 4,500 dollars belongs on Schedule 1 line 8j. The expenses are not deductible federally through 2025. The EA's exam answer would also identify the audit risk of the original return.

Worked Example: The Real Estate Side Activity

Lila buys a single rental property and earns about 18,000 dollars per year in rent. Her expenses are 14,000 dollars. She uses a property manager.

Analysis: this is not a Schedule C activity at all. Rental real estate that does not rise to a trade or business is reported on Schedule E. The trade or business question for real estate is separate, with the safe harbor under Revenue Procedure 2019-38 for the QBI deduction requiring 250 hours of rental services per year, separate books, contemporaneous records, and a written statement filed with the return.

EAs are tested on whether the activity is Schedule C, Schedule E, or Schedule F, before applying the hobby analysis. Schedule C is for non-real-estate trade or business income. Schedule E covers rental real estate (with limited exceptions for hotels and substantial services). Schedule F covers farming.

Self-Employment Tax Mechanics

Once an activity is Schedule C, the net earnings flow to Schedule SE. The SE tax is 15.3 percent on the first 168,600 dollars of net earnings for 2024 (1.45 percent Medicare continues without cap; 0.9 percent additional Medicare applies above 200,000 single or 250,000 joint). Net earnings are 92.35 percent of net Schedule C profit.

EAs are tested on the 0.9235 adjustment, the wage base, and the deduction for half of SE tax. A common exam error is computing SE tax on gross receipts rather than net earnings, or forgetting the 0.9235 step.

Common Schedule C Preparer Mistakes

• Treating a hobby as a Schedule C activity to take losses. This is the largest audit trigger and the largest preparer due diligence exposure.
• Forgetting to file Schedule SE when net profit exceeds 400 dollars.
• Deducting personal expenses (meals not connected to a business purpose, family travel, vehicle use without proper allocation).
• Claiming home office without meeting the exclusive use and principal place of business tests.
• Forgetting 1099-NEC issuance obligations for payments above 600 dollars to non-employees.
• Reporting cash receipts only on Form 1099-K basis and missing the reality that Schedule C requires all gross receipts.

Qualified Business Income Deduction Connection

A genuine Schedule C activity may be eligible for the qualified business income deduction under Section 199A. A hobby is not. This is a major reason to classify correctly. The deduction is 20 percent of qualified business income with limits based on taxable income, W-2 wages of the business, and unadjusted basis of property. Specified service trade or business limits kick in at threshold amounts that adjust annually.

EAs should recognize that classification as a hobby disqualifies the income from the QBI deduction even if the activity would otherwise have qualified.

Exam Framing

EA exam questions on Schedule C typically involve:

1. A fact pattern with mixed profit motive. Apply the Section 183 framework and choose business or hobby.
2. A computation question on SE tax. Remember the 0.9235 adjustment, the wage base for the year, and the above-the-line deduction.
3. A due diligence question about the preparer's obligation. Document the basis for treating the activity as a business.
4. An interaction question with QBI, retirement plan contributions, or home office.

The most consistent test approach is to read the fact pattern, identify the activity type (Schedule C, E, or F), then apply the hobby analysis only if the activity meets the trade or business threshold. Practice these patterns in our EA Part 1 question bank.