29 CFR § 825.207 - Substitution of paid leave.
(a) Generally, FMLA leave is unpaid leave. However, under the circumstances described in this section, FMLA permits an eligible employee to choose to substitute accrued paid leave for FMLA leave. If an employee does not choose to substitute accrued paid leave, the employer may require the employee to substitute accrued paid leave for unpaid FMLA leave. The term substitute means that the paid leave provided by the employer, and accrued pursuant to established policies of the employer, will run concurrently with the unpaid FMLA leave. Accordingly, the employee receives pay pursuant to the employer's applicable paid leave policy during the period of otherwise unpaid FMLA leave. An employee's ability to substitute accrued paid leave is determined by the terms and conditions of the employer's normal leave policy. When an employee chooses, or an employer requires, substitution of accrued paid leave, the employer must inform the employee that the employee must satisfy any procedural requirements of the paid leave policy only in connection with the receipt of such payment. See § 825.300(c). If an employee does not comply with the additional requirements in an employer's paid leave policy, the employee is not entitled to substitute accrued paid leave, but the employee remains entitled to take unpaid FMLA leave. Employers may not discriminate against employees on FMLA leave in the administration of their paid leave policies.
(b) If neither the employee nor the employer elects to substitute paid leave for unpaid FMLA leave under the above conditions and circumstances, the employee will remain entitled to all the paid leave which is earned or accrued under the terms of the employer's plan.
(c) If an employee uses paid leave under circumstances which do not qualify as FMLA leave, the leave will not count against the employee's FMLA leave entitlement. For example, paid sick leave used for a medical condition which is not a serious health condition or serious injury or illness does not count against the employee's FMLA leave entitlement.
(d) Leave taken pursuant to a disability leave plan would be considered FMLA leave for a serious health condition and counted in the leave entitlement permitted under FMLA if it meets the criteria set forth above in §§ 825.112 through 825.115. In such cases, the employer may designate the leave as FMLA leave and count the leave against the employee's FMLA leave entitlement. Because leave pursuant to a disability benefit plan is not unpaid, the provision for substitution of the employee's accrued paid leave is inapplicable, and neither the employee nor the employer may require the substitution of paid leave. However, employers and employees may agree, where state law permits, to have paid leave supplement the disability plan benefits, such as in the case where a plan only provides replacement income for two-thirds of an employee's salary.
(e) The Act provides that a serious health condition may result from injury to the employee on or off the job. If the employer designates the leave as FMLA leave in accordance with § 825.300(d), the leave counts against the employee's FMLA leave entitlement. Because the workers' compensation absence is not unpaid, the provision for substitution of the employee's accrued paid leave is not applicable, and neither the employee nor the employer may require the substitution of paid leave. However, employers and employees may agree, where state law permits, to have paid leave supplement workers' compensation benefits, such as in the case where workers' compensation only provides replacement income for two-thirds of an employee's salary. If the health care provider treating the employee for the workers' compensation injury certifies the employee is able to return to a light duty job but is unable to return to the same or equivalent job, the employee may decline the employer's offer of a light duty job. As a result the employee may lose workers' compensation payments, but is entitled to remain on unpaid FMLA leave until the employee's FMLA leave entitlement is exhausted. As of the date workers' compensation benefits cease, the substitution provision becomes applicable and either the employee may elect or the employer may require the use of accrued paid leave. See also §§ 825.210(f), 825.216(d), 825.220(d), 825.307(a) and 825.702(d)(1) and (2) regarding the relationship between workers' compensation absences and FMLA leave.
(f) Section 7(o) of the Fair Labor Standards Act (FLSA) permits public employers under prescribed circumstances to substitute compensatory time off accrued at one and one-half hours for each overtime hour worked in lieu of paying cash to an employee when the employee works overtime hours as prescribed by the Act. This section of the FLSA limits the number of hours of compensatory time an employee may accumulate depending upon whether the employee works in fire protection or law enforcement (480 hours) or elsewhere for a public agency (240 hours). In addition, under the FLSA, an employer always has the right to cash out an employee's compensatory time or to require the employee to use the time. Therefore, if an employee requests and is permitted to use accrued compensatory time to receive pay for time taken off for an FMLA reason, or if the employer requires such use pursuant to the FLSA, the time taken may be counted against the employee's FMLA leave entitlement.