trade or business
Defined in 4 places of the United States Code.
For purposes of paragraph (1)(A), the term “trade or business” includes any activity involving research or experimentation (within the meaning of section 174).
Source
- 1994–present26 U.S.C. § 469Internal Revenue Code · Passive activity losses and credits limited · for purposes of this section
For purposes of the preceding sentence, the term “trade or business” includes any activity treated as a trade or business under paragraph (5) or (6) of section 469(c).
Source
- 1997–present26 U.S.C. § 772Internal Revenue Code · Simplified flow-through · for purposes of this section
For purposes of this section, the term “trade or business” includes any activity which is carried on for the production of income from the sale of goods or the performance of services. For purposes of the preceding sentence, an activity does not lose identity as a trade or business merely because it is carried on within a larger aggregate of similar activities or within a larger complex of other endeavors which may, or may not, be related to the exempt purposes of the organization. Where an activity carried on for profit constitutes an unrelated trade or business, no part of such trade or business shall be excluded from such classification merely because it does not result in profit.
Source
- 1994–present26 U.S.C. § 513Internal Revenue Code · Unrelated trade or business · for purposes of this section
The term “trade or business” includes the performance of the functions of a public office.
Source
- 1994–present26 U.S.C. § 7701Internal Revenue Code · Definitions · in this title
To the extent provided in regulations, for purposes of paragraph (1)(A), the term “trade or business” includes—
(A) any activity in connection with a trade or business, or
(B) any activity with respect to which expenses are allowable as a deduction under section 212.
Source
- 1994–present26 U.S.C. § 469Internal Revenue Code · Passive activity losses and credits limited · for purposes of this section