Vacancy = lost revenue. Calculating this percentage provides the owner with an anticipated value towards rent increases for the following year by offsetting median vacancy loss experienced during the current year. Owners should be asking themselves the following questions (1) what is contributing to your vacancies? (2) how long does it take to do unit turns? (3) where are you finding tenants? (4) Are you working with real estate agents strong in your area of rentals? These are all valid questions that affect profitability because owners are still incurring operating expenses.