26 CFR 31.3401(a)(4)-1 - Cash remuneration for service not in the course of employer's trade or business.
(a) Cash remuneration paid for services not in the course of the employer's trade or business performed by an employee for an employer in a calendar quarter is excepted from wages and hence is not subject to withholding unless -
(b) The term “services not in the course of the employer's trade or business” includes services that do not promote or advance the trade or business of the employer. As used in this section, the term does not include service not in the course of the employer's trade or business performed on a farm operated for profit or domestic service in a private home, local college club, or local chapter of a college fraternity or sorority. Accordingly, this exception does not apply with respect to remuneration which is excepted from wages under section 3401(a)(2) or section 3401(a)(3) (see §§ 31.3401(a)(2)-1 and 31.3401(a)(3)-1, respectively). Remuneration paid for service performed for a corporation does not come within the exception.
(c) The test relating to cash remuneration of $50 or more is based on the remuneration earned during a calendar quarter rather than on the remuneration paid in a calendar quarter. However, for purposes of determining whether the test is met, it is also required that the remuneration be paid, although it is immaterial when the remuneration is paid. Furthemore, in determining whether $50 or more has been paid for service not in the course of the employer's trade or business, only cash remuneration for such service shall be taken into account. The term “cash remuneration” includes checks and other monetary media of exchange. Remuneration paid in any other medium, such as lodging, food, or other goods or commodities, is disregarded in determining whether the cash-remuneration test is met.
(d) For purposes of this exception, an individual is deemed to be regularly employed by an employer during a calendar quarter only if -
(1) Such individual performs service not in the course of the employer's trade or business for such employer for some portion of the day on at least 24 days (whether or not consecutive) during such calendar quarter; or
(2) Such individual was regularly employed (as determined under paragraph (d)(1) of this section) by such employer in the performance of service not in the course of the employer's trade or business during the preceding calendar quarter.
(2) Any day or portion thereof on which the employee does not perform service of the prescribed character but with respect to which cash remuneration is paid or payable to the employee for such service, such as a day on which the employee is sick or on vacation.