You have to pay them for travel time that is part of their job duties. The time employees spend commuting from their homes to the workplace is not paid. However, if an employee is required to spend time traveling after the work day begins -- to call on customers or to purchase goods and equipment, for example -- you must pay them for this time. If an employee takes a business trip to another city, you may have to pay for time spent in transit; the rules depend on the length of the trip and when the employee travels. For more on travel time, see Nolo's article Paying Employees Who Are On Call or Traveling for Business.