(exclusive of remuneration excepted from wages in accordance with paragraph (j) of § 31.3121(a)-1 or §§ 31.3121(a)(2) -1 to 31.3121(a)(15)-1, inclusive) paid within the calendar year by an employer to the employee for employment performed for him at any time after 1936. For provisions relating to the treatment of tips for purposes of the annual wage limitation see § 31.3121(q)-1 .
Example. Employee A, in 1967 receives $7,000 from employer B in part payment of $8,000 due him from employment performed in 1967. In 1968 A receives from employer B the balance of $1,000 due him for employment performed in 1967, and thereafter in 1968 also receives $7,000 for employment performed in 1968 for employer B. The first $6,600 of the $7,000 received during 1967 is subject to the taxes in 1967. The remaining $400 received in 1967 is not included as wages and is not subject to the taxes. The balance of $1,000 received in 1968 for employment during 1967 is subject to the taxes during 1968 as is also the first $6,800 of the $7,000 thereafter received in 1968 ($1,000 plus $6,800 totaling $7,800, which is the annual wage limitation applicable to remuneration received in 1968 by an employee from any one employer). The remaining $200 received in 1968 is not included as wages and is not subject to the taxes.
Example. The Y Corporation in 1968 acquires by purchase all the property of the X Company and immediately after the acquisition employs in its trade or business employee A, who, immediately prior to the acquisition, was employed by the X Company. The X Company has in 1968 (the calendar year in which the acquisition occurs) and prior to the acquisition paid $5,000 of wages to A. The Y Corporation in 1968 pays to A remuneration of $5,000 with respect to employment. Only $2,800 of the remuneration paid by the Y Corporation is considered to be wages. For purposes of the $7,800 limitation, the Y Corporation is credited with the $5,000 paid to A by the X Company. If in the same calendar year, the Z Company acquires the property by purchase from the Y Corporation and A immediately after the acquistion is employed by the Z Company in its trade or business, no part of the remuneration paid to A by the Z Company in the year of the acquisition will be considered to be wages. The Z Company will be credited with the remuneration paid to A by the Y Corporation and also with the wages paid to A by the X Company (considered for purposes of the application of the $7,800 limitation as having also been paid by the Y Corporation).
26 C.F.R. §31.3121(a)(1)-1