Being salaried (not hourly) is part of the test to be exempt--hourly employees by definition are not exempt--but it's only the first step in being exempt. To be exempt from overtime, you also must meet one or more of the tests or criteria for exemption, the main one of which for you (based on what you write) is likely the "executive" test (it should be called the "managerial" test, since it applies to non-executive managers and supervisors, too). You can find these tests on the U.S. Department of Labor (DOL) website under "overtime." Review them, and compare to your job duties and responsibilities. If you meet one or more of the tests and you are salarieed, you are exempt; but if you don't meet any tests, then you are owed overtime when working more then 40 hours in a week, even though you are salaried.