26 C.F.R. § 1.1402(e)(2)-1
Example (1). M was ordained as a minister in May 1963. During each of the taxable years 1963 and 1966, M, who makes his income tax returns on a calendar year basis, derives net earnings in excess of $400 from his activities as a minister. M has net earnings of $350 for each of the taxable years 1964 and 1965, $200 of which is derived from service performed by him as a minister. If M wishes to have the Federal old-age, survivors, and disability insurance system established by title II of the Social Security Act extended to his service as a minister, he must file the waiver certificate on or before the due date of his income tax return for 1966, or any extension thereof.
Example (2). M, who was ordained a minister in January 1965, is employed as a toolmaker by the XYZ Corporation for the taxable years 1965 and 1966 and also engages in activities as a minister on weekends. M makes his income tax return on the basis of a calendar year. During each of the taxable years 1965 and 1966, M receives wages of $4,800 from the XYZ Corporation and derives $400 (all of which constitutes net earnings from self-employment computed as prescribed in paragraph (c) of this section) from his activities as a minister. In such case if M wishes to have the Federal old-age, survivors, and disability insurance system established by title II of the Social Security Act extended to his services as a minister, he must file the waiver certificate on or before the due date of his income tax return for 1966, or any extension thereof. A waiver certificate filed after such date will be invalid. It should be noted that although by reason of section 1402(b)(1)(C) no part of the $400 for the taxable year 1965 represents "self-employment income", nevertheless the entire $400 constitutes "net earnings from self-employment" for purposes of fulfilling the requirements of section 1402(e)(2).
Example (3). M, who files his income tax returns on a calendar year basis, was ordained as a minister in June 1964. During 1964 he receives $410 for services performed in the exercise of his ministry. In addition to his ministerial services, M is engaged during the year 1964 in a mercantile venture from which he derives net earnings from self-employment in the amount of $1,000. The expenses incurred by him in connection with his ministerial services during 1964 and which are allowable deductions under Chapter 1 of the Internal Revenue Code amount to $410. During 1965 and 1966, M has net earnings from self-employment in amounts of $1,200 and $1,500, respectively, and some part of each of these amounts is from the exercise of his ministry. The deductions allowed in each of the years 1965 and 1966 by Chapter 1 which are attributable to the gross income derived by M from the exercise of his ministry in each of such years, respectively, do not equal or exceed such gross income in such year. If M wishes to have the Federal old-age, survivors, and disability insurance system established by title II of the Social Security Act extended to his service as a minister, he must file a waiver certificate on or before the due date of his income tax return (including any extension thereof) for 1966.
Example (4). M, a licensed minister who makes his income tax returns on the basis of a calendar year, derived net earnings of $400 or more from the exercise of his ministry for two or more of the taxable years 1955 to 1965, inclusive. In such case, if M wishes to have the Federal old-age, survivors, and disability insurance system established by title II of the Social Security Act extended to his services as a minister, he must file the waiver certificate on or before the due date (April 15, 1966) prescribed for filing his income tax return for 1965, or any extension thereof. A waiver certificate filed after such date will be invalid.
26 C.F.R. §1.1402(e)(2)-1