In the United States, expense reimbursement is only required in a couple of cases.
1. In the event an employment contract contains expense reimbursement, an employer is responsible for expense payments.
2. When employees pay for business related expenses, they are kicking back money to their employers. These kickbacks must be subtracted from an employee’s wages to accurately calculate minimum wage. If employees are not paid at least minimum wage, free and clear, the employer is in violation of the FLSA.
However, some states have their own laws surrounding expense reimbursement. Those states include: Illinois, California, Massachusetts, Montana, Pennsylvania, New York, Iowa, and the District of Columbia. Illinois was the newest addition this year.