26 C.F.R. § 1.1402(a)-15
Example (1). F is engaged in the business of farming and computes his income under the cash receipts and disbursements method. He files his income tax returns on the basis of the calendar year. During the year 1966, F's gross income from the business of farming (computed in accordance with paragraph (b) (1) of this section) is $2,325. His actual net earnings from self-employment derived from such business are $1,250. As his net earnings from self-employment, F may report $1,250 or, by the optional computation method, he may report $1,550 (662/3 percent of $2,325).
Example (2). G is engaged in the business of farming and computes his income under the accrual method. His income tax returns are filed on the calendar year basis. For the year 1966, G's gross income from the operation of his farm (computed in accordance with paragraph (b)(2) of this section) is $2,800. He has actual net earnings from self-employment derived from such farm in the amount of $1,250. As his net earnings from self-employment derived from his farm, G may report his actual net earnings of $1,250, or by the optional method he may report $1,600. If G's actual net earnings from self-employment from his farming activities for 1966 were in an amount of $1,600 or more, he would be required to report such amount in computing his self-employment income.
Example (3). M, who files his income tax returns on a calendar year basis, is one of the three partners of the XYZ Company, a partnership, engaged in the business of farming. The taxable year of the partnership is the calendar year, and its income is computed under the cash receipts and disbursements method. For M's services in connection with the planting, cultivating, and harvesting of the crops during the year 1966 the partnership agrees to pay him $500, the full amount of which is determined without regard to the income of the partnership and constitutes a guaranteed payment within the meaning of section 707(c). This guaranteed payment to M is the only such payment made during such year. The gross income derived from the business for the year 1966 computed in accordance with paragraph (b)(1) of this section and after being reduced by the guaranteed payment of $500 made to M, is $3,000. One-third of the $3,000 ($1,000), is M's distributive share of such gross income. Under paragraph (c) of this section, the guaranteed payment ($500) received by M and his distributive share of the partnership gross income ($1,000) are deemed to have been derived from one trade or business, and such amounts must be aggregated for purposes of the optional method of computing net earnings from self-employment. Since M's combined gross income from his two agricultural businesses ($1,000 and $500) is not more than $2,400 and since such income is deemed to be derived from one trade or business, M's net earnings from self-employment derived from such farming business may, at his option, be deemed to be $1,000 (662/3 percent of $1,500).
Example (4). A is one of the two partners of the AB partnership which is engaged in the business of farming. The taxable year of the partnership is the calendar year and its income is computed under the accrual method. A files his income tax returns on the calendar year basis. The partnership agreement provides for an equal sharing in the profits and losses of the partnership by the two partners. A is an experienced farmer and for his services as manager of the partnership's farm activities during the year 1966 he receives $6,000 which amount constitutes a guaranteed payment within the meaning of section 707(c). The gross income of the partnership derived from such business for the year 1966, computed in accordance with paragraph (b)(2) of this section and after being reduced by the guaranteed payment made to A, is $9,600. A's distributive share of such gross income is $4,800 and his distributive share of income described in section 702(a)(9) derived from the partnership's business is $1,900. Under paragraph (c) of this section, the guaranteed payment received by A and his distributive share of the partnership gross income are deemed to have been derived from one trade or business, and such amounts must be aggregated for purposes of the optional method of computing his net earnings from self-employment. Since the aggregate of A's guaranteed payment ($6,000) and his distributive share of partnership gross income ($4,800) is more than $2,400 and since the aggregate of A's guaranteed payment ($6,000) and his distributive share ($1,900) of partnership income described in section 702(a)(9) is not less than $1,600, the optional method of computing net earnings from self-employment is not available to A.
Example (5). F is a member of the EFG partnership which is engaged in the business of farming. F files his income tax returns on the calendar year basis. The taxable year of the partnership is the calendar year, and its income is computed under a cash receipts and disbursements method. Under the partnership agreement the partners are to share equally the profits or losses of the business. The gross income derived from the partnership business for the year 1966, computed in accordance with paragraph (b)(1) of this section is $7,500. F's share of such gross income is $2,500. Due to drought and an epidemic among the livestock, the partnership sustains a net loss of $7,800 for the year 1966 of which loss F's share is $2,600. Since F's distributive share of gross income derived from such business is in excess of $2,400 and since F does not receive income described in section 702(a)(9) of $1,600 or more from such business, he may, at his option, be deemed to have received $1,600 as his distributive share of income described in section 702(a)(9) from such business.
26 C.F.R. §1.1402(a)-15