LEGAL DISCLAIMER: This article provides general, informational content for educational purposes only. It is not a substitute for professional legal advice from a qualified attorney or certified tax professional. Always consult with a qualified expert for guidance on your specific financial and legal situation.
Imagine two people who love woodworking. The first, Sarah, spends her weekends in the garage, crafting beautiful birdhouses for friends and family. She occasionally sells one online if someone asks, but her main goal is relaxation and the joy of creation. Her day job as an accountant pays all her bills. The second person, David, quit his job to make custom furniture full-time. He spends 60 hours a week in his workshop, marketing his pieces, managing inventory, and dealing with clients. His entire livelihood depends on selling that furniture. The internal_revenue_service (IRS) looks at Sarah and David very differently. Sarah has a hobby, while David is running a business. But what's the legal line that separates them? This is the exact question at the heart of Commissioner v. Groetzinger, a landmark supreme_court_of_the_united_states case that defines what it means to be in a “trade or business” for tax purposes. The answer determines whether you can deduct your expenses, potentially saving you thousands of dollars, or whether those costs are simply the price of a passion project. This guide will demystify the “Groetzinger test” and show you how it applies to everyone from full-time gamblers and day traders to gig_economy workers and freelancers.
For decades, the internal_revenue_code has allowed taxpayers to deduct “all the ordinary and necessary expenses paid or incurred… in carrying on any trade or business.” It's one of the most powerful tools for any entrepreneur. But there was a persistent, nagging problem: the Code itself never actually defined what a “trade or business” *is*. This ambiguity left a massive grey area for taxpayers and the IRS. The courts tried to fill the void. An early key case was `higgins_v_commissioner` (1941). Mr. Higgins was a wealthy man who spent a significant amount of time managing his massive portfolio of stocks and bonds. He hired staff and rented offices in New York and Paris to help. He tried to deduct the costs of these activities as business expenses. The Supreme Court said no. They ruled that merely managing one's own investments, for the purpose of collecting dividends and interest, was not a trade or business. It was the activity of an `investor`, not an entrepreneur. This ruling was helpful, but it still left the central question unanswered. If managing a huge portfolio wasn't a business, what was? The IRS and lower courts developed a “facts and circumstances” approach, looking at each case individually, which led to inconsistent rulings across the country. A gambler in one state might be considered a professional, while a gambler with a similar profile in another state was deemed a hobbyist. The legal world needed a clear, authoritative standard.
The Groetzinger case revolved around the interpretation of two critical sections of the U.S. tax code. Understanding them is key to grasping the case's importance.
The central issue in *Groetzinger* was that these powerful benefits are only available to a “trade or business.” If your activity is just a hobby or an investment, you can't use them.
The Groetzinger ruling didn't create a rigid, mathematical formula. Instead, it affirmed a “facts and circumstances” test. This means the IRS and courts look at the whole picture of your activity. There's no single factor that decides the issue. Below is a comparison of activities that often do, and do not, meet the Groetzinger standard.
| Factor | Likely a Trade or Business (Meets Groetzinger Test) | Likely a Hobby or Investment (Fails Groetzinger Test) |
|---|---|---|
| Time & Effort | You work 40+ hours a week on the activity. It is your primary occupation. | You engage in the activity sporadically, on weekends or evenings. |
| Regularity | You perform the activity daily or weekly, following a consistent schedule. | Your involvement is infrequent and unpredictable. |
| Livelihood | You rely on the income from this activity to pay your living expenses. | You have a separate full-time job that provides your primary income. |
| Business-like Manner | You keep detailed books and records, have a separate bank account, and a business plan. | You casually mix personal and activity funds and keep minimal records. |
| Expertise | You have developed specialized knowledge and skills to improve profitability. | You are a novice and engage in the activity for learning or recreation. |
| Expectation of Profit | You have a realistic, good-faith intention to make a profit, even if currently at a loss. | Your primary motivation is personal pleasure, recreation, or social connection. |
What this means for you: If you want the IRS to treat your side hustle as a business, you need to act like a business owner. Document your hours, track every dollar, and operate with the professionalism you would bring to a traditional job.
The Supreme Court's decision provided a two-pronged test to define a “trade or business.” An activity must satisfy both prongs to qualify.
This is the “why” question. Why are you engaging in this activity? To be a business, your overarching, primary motive must be to make money. This doesn't mean you have to be profitable from day one. Many legitimate businesses, from tech startups to local restaurants, lose money for years. What matters is your intent. You must be operating with a good-faith objective of realizing a profit.
The IRS uses several factors to judge your intent, including whether you change your methods to improve profitability, your history of profits and losses, and your level of expertise.
This is the “how” question. How involved are you? The Supreme Court stated that the taxpayer's involvement must be “continuous and regular.” This is the element that distinguishes a business from a sporadic, part-time, or passive activity.
This prong is crucial for distinguishing between an active `trader_in_securities`, who may qualify for business status, and a passive `investor`. An investor might spend a lot of time researching stocks, but they aren't buying and selling on a daily basis as their primary activity. Their involvement is not “continuous and regular” in the way the Court intended.
So, how does this 1987 court case affect you, a modern-day freelancer, online seller, or day trader? The principles are more relevant than ever. Here's your practical playbook for navigating the trade-or-business landscape.
Before you even think about taxes, ask yourself the “why” question.
The “continuous and regular” prong requires evidence. You can't just tell the IRS you work hard; you have to prove it.
This is perhaps the most critical step. Treat your activity like the serious enterprise you want it to be.
If your activity qualifies as a trade or business under the Groetzinger test, these forms will become part of your financial life.
Robert Groetzinger was laid off from his job in 1978. For the rest of that year, he decided to try and make a living by gambling on dog races. This was no casual hobby. He went to the track 6 days a week, spending 60 to 80 hours per week on his activities, which included studying racing forms, watching the races, and placing bets. He had no other job. At the end of the year, his finances looked like this: he had winnings of $70,000, but his losses were $72,032. He had a net loss of $2,032. On his tax return, he reported his gambling activities as a “trade or business.” He argued that his losses were a `net_operating_loss` (NOL) that he should be able to use to offset other income. The IRS disagreed. They argued that gambling, by its nature, could not be a “trade or business.” They claimed it was a personal pursuit, a hobby, and therefore his losses were not deductible as business expenses.
The Supreme Court didn't have to decide if Mr. Groetzinger was a “good” businessman. They had to answer a much more fundamental legal question: “Is a person engaged in the 'trade or business' of gambling if he wagers full-time for his own account with the intent to make a profit?” More broadly, the Court sought to create a clear, workable definition of “trade or business” that could be applied consistently not just to gamblers, but to anyone engaged in a solo venture.
In a nearly unanimous decision, the Supreme Court sided with Groetzinger. They rejected the IRS's argument that a gambler could never be in a trade or business. They also rejected a proposed “goods and services” test, which would have required a business to offer goods or services to others. Instead, Justice Blackmun, writing for the majority, established the two-pronged standard that is now the law of the land:
“We conclude that to be engaged in a trade or business, the taxpayer must be involved in the activity with continuity and regularity and that the taxpayer's primary purpose for engaging in the activity must be for income or profit. A sporadic activity, a hobby, or an amusement diversion does not qualify.”
The Court found that Groetzinger's full-time effort—60 to 80 hours a week, almost every week of the year—clearly met the “continuous and regular” standard. His complete financial dependence on the activity demonstrated that his primary purpose was for income. He was, for tax purposes, a professional gambler running a business. How this ruling impacts you today: The Court's decision was a major victory for sole proprietors and independent contractors. It affirmed that you don't need employees or a fancy storefront to be a “business.” If you work at your venture full-time with the intention of making a living, you are in a trade or business and are entitled to all the associated tax deductions.
While the decision was a strong majority, there was a dissenting opinion from Justice White, who worried about the line between a professional gambler and an obsessed hobbyist. He also raised concerns about the distinction between an active trader and a passive investor, a line that remains a frequent point of contention in tax law today. Justice Scalia also wrote a separate dissent, arguing for a more traditional definition of business that involves providing goods or services to customers.
The *Groetzinger* test is more relevant today than ever. The principles are now applied to modern work arrangements that the 1987 court could have barely imagined.
The nature of “work” is evolving, and these changes will continue to test the boundaries of the *Groetzinger* definition.
The core principles of *Groetzinger*—consistent effort and a motive for profit—are likely to endure. But their application will require constant adaptation as technology redefines what it means to run a business.