Work-hours
(i) Payments included in work-hours. Work-hours include regular time worked; overtime; time paid for vacations and holidays; time allowed for meals; away-from-home terminal time; called and not used, runaround, and deadheading time; time for attending court, participating in investigations, and attending claim and safety meetings; and guaranteed time not worked. Work-hours also include conversion hours, that is, compensation converted into work-hours. Conversion hours may be derived from payment by the mile or by the piece. Work-hours also include time for which the employee is paid for periods of absence not due to sickness or accident disability, such as for routine medical and dental examinations or for time lost. (ii) Payments excluded from work-hours. Certain kinds of payments are not subject to conversion into work-hours. These include those payments that are specifically excluded from compensation within the meaning of section 3231(e), such as certain sick pay payments (section 3231(e)(1)(i)); tips (section 3231(e)(1)(ii)); and amounts paid specifically (either as an advance, as reimbursement, or allowance) for traveling expenses (section 3231(e)(1)(iii)). Traveling expenses paid under a nonaccountable plan are excluded from work-hours even though they are includible in compensation. See 31.3231(e)-1(a)(5). Also excluded from work-hours are amounts representing bonuses, amounts received pursuant to the exercise of an employee stock option, and all separation payments or severance allowances. (2) Hourly compensation. Because the tax under section 3221(c) is calculated on the basis of work-hours, the number of hours for which an employee receives compensation is the figure used to determine work-hours. In the case of an hourly-rated employee, each hour for which the employee receives compensation is one work-hour. (3) Daily, weekly, monthly compensation. (i) If an employee is paid by the day, week, month, or other period of time, the tax is imposed on the number of hours comprehended in the rate and, if any, the number of overtime hours for which additional compensation is paid. Thus, in the case of an office worker who receives an annual salary based on an 8-hour, 5-day-a-week work schedule that includes paid holidays, vacations, and sick time, the number of work-hours for one month is 174 (2088 hours/year 12 months). (ii) The rule in paragraph (b)(3)(i) of this section is illustrated by the following examples. (4) Conversion hours(i) Compensation not based on time (hour, day, month, etc.), such as compensation paid by the mile or by the piece, must be converted into the number of hours represented by the compensation paid. Thus, if an employee is paid by the mile, 1 work-hour equals the number of miles constituting a workday, divided by 8 hours. However, in the case of a collective bargaining agreement that specifies a number of hours as constituting a workday, the number of hours specified under the agreement may be used instead of 8. (ii) The rule in paragraph (b)(4)(i) of this section is illustrated by the following example.