Tax Legal Services · Primary-source case analysis

Groetzinger: Full-Time Gambling Could Be a Trade or Business

By Aneeta Mishra and Timothy Chan

Published May 9, 2026 · Updated October 18, 2026

Decision: Comm’r v. Groetzinger, 480 U.S. 23 (1987).

Commissioner v. Groetzinger explains the continuity, regularity, and profit-purpose features that separate a trade or business from a sporadic activity or hobby.

The taxpayer devoted the year to wagering

Robert Groetzinger had no other employment and spent sixty to eighty hours each week studying and making parimutuel wagers. He gambled solely for his own account after losing his prior job in February 1978. He did receive salary earned before termination and other nongambling income that year. His $70,000 winnings and $72,032 wagers produced a $2,032 net gambling loss, but the case did not allow that excess loss as a deduction. Groetzinger, 480 U.S. at 24–26.

Trade or business required sustained profit-seeking activity

The Court declined to impose a universal requirement that the taxpayer hold himself out as selling goods or services to others. It instead asked whether the activity was pursued with continuity and regularity and with the primary purpose of income or profit.

The activity met that standard

Groetzinger’s gambling was extensive, continuous, and his intended livelihood, not an occasional amusement. The Court therefore treated it as a trade or business for the minimum-tax provision then before it.

The holding does not erase other tax limits

The Court affirmed on the classification question for the historical minimum-tax provisions. The Commissioner acknowledged that post-1982 statutory changes already removed this particular gambling-loss minimum-tax problem. The Court also expressly confined its interpretation to the Code sections at issue and did not overrule Higgins on management of investments. Groetzinger, 480 U.S. at 26 n.4, 27 n.8, 35–36. It did not make every frequent gambling activity a business or eliminate separate restrictions on deducting gambling losses and expenses. Current treatment depends on contemporary Code provisions, records, profit motive and the nature of the activity. For tax years beginning after December 31, 2025, current section 165(d) limits wagering-loss deductions to 90% of losses and no more than wagering gains; the definition includes otherwise allowable deductions incurred carrying on wagering transactions. The 1987 classification holding does not override that later rule.

Key takeaways

• Document time, frequency, organization, and profit purpose.
• Sporadic or hobby activity is not a trade or business.
• Business classification does not override separate loss limitations.
• Maintain complete wagering, expense, and income records.