There are a couple of ways that the VA handles OT that is different than the private sector, but for the most part it usually ends up being beneficial. In addition to the 80 hour rule, any shift worked outside of your scheduled shifts counts as overtime. Your unit schedule will usually come out a few weeks in advance and your shifts (aka: tour) will be certified. Even if you are scheduled less than 80 hours, any shift worked in addition to your certified tour is considered overtime. Most likely it is not something that will come up very often, but it means that if you are getting ready for vacation and are only scheduled 24 hours in a two week period (because you are taking vacation the other week) you can work OT and get paid OT pay even though you are not working the magical 80 hours.