The U.S. Department of Labor stated that employers cannot exclude reimbursement payments made to employees from their regular rate of pay if the employees do not actually incur those expenses.
Reimbursement payments must be reasonably approximate to the employee's actual incurred expenses.
Employers cannot use tool and expense reimbursement payments to artificially reduce employees' regular rates of pay and avoid overtime pay obligations.
A 2021 decision by the 9th U.S. Circuit Court of Appeals ruled that certain per diem payments must be included in employees' regular rate of pay.