A partnership is described in paragraph (a)(2)(ii) of this section, if the partnership has a C corporation as a partner at any time during the partnership's taxable year beginning after December 31, 1986.
Thus, for purposes of this section, the term "farming business" includes the raising of timber. For purposes of this section, the term "farming business" does not include the processing of commodities or products beyond those activities normally incident to the growing, raising or harvesting of such products. For example, assume that a C corporation taxpayer is in the business of growing and harvesting wheat and other grains. The taxpayer processes the harvested grains to produce breads, cereals, and similar food products which it sells to customers in the course of its business. Although the taxpayer is in the farming business with respect to the growing and harvesting of grain, the taxpayer is not in the farming business with respect to the processing of such grains to produce food products which the taxpayer sells to customers. Similarly, assume that a taxpayer is in the business of raising poultry or other livestock. The taxpayer uses the livestock in a meat processing operation in which the livestock are slaughtered, processed, and packaged or canned for sale to customers. Although the taxpayer is in the farming business with respect to the raising of livestock, the taxpayer is not in the farming business with respect to the meat processing operation. However, under this section the term "farming business" does include processing activities which are normally incident to the growing, raising or harvesting of agricultural products. For example, assume a taxpayer is in the business of growing fruits and vegetables. When the fruits and vegetables are ready to be harvested, the taxpayer picks, washes, inspects, and packages the fruits and vegetables for sale. Such activities are normally incident to the raising of these crops by farmers. The taxpayer will be considered to be in the business of farming with respect to the growing of fruits and vegetables, and the processing activities incident to the harvest.
Substantially all of the activities of a corporation are involved in the performance of services in any field described in the preceding sentence (a qualifying field), only if 95 percent or more of the time spent by employees of the corporation, serving in their capacity as such, is devoted to the performance of services in a qualifying field. For purposes of determining whether this 95 percent test is satisfied, the performance of any activity incident to the actual performance of services in a qualifying field is considered the performance of services in that field. Activities incident to the performance of services in a qualifying field include the supervision of employees engaged in directly providing services to clients, and the performance of administrative and support services incident to such activities.
For purposes of this paragraph (e)(5) of this section, the term "substantially all" means an amount equal to or greater than 95 percent.
26 C.F.R. §1.448-1T