You must be an employee for your work to be covered as employment for social security purposes. You are an employee if you are—
(a)
A corporation officer as described in § 404.1006 ;
(b)
A common-law employee as described in § 404.1007 (unless you are, after December 31, 1982, a qualified real estate agent or direct seller as described in § 404.1069 ); or
(c)
An agent-driver or commission-driver, a full-time life insurance salesman, a home worker, or a traveling or city salesman as described in § 404.1008.
Code of Federal Regulations
[45 FR 20075, Mar. 27, 1980, as amended at 48 FR 40515, Sept. 8, 1983]