How much would you have to pay for transportation, work clothes or child care if you worked part time? Those expenses and others could consume most of the money you earn from a part-time job. The number of hours that part-time employees work often fluctuates, so you may not earn enough each week to cover your expenses. Moreover, "Inc." magazine notes that some part-time employees work as much as 30 hours per week, but they’re ineligible for health plans that full-time workers receive.