Q: I am a GS-11 who has my overtime hourly rate capped at $38.31. Is there a calculator available that will help me decide how many overtime hours to take pay for as opposed to taking compensatory time? At a certain point, it is not worthwhile to take overtime pay because of the increase in the amount of federal tax withdrawn? A: I’m not aware of any such calculator. However, if anyone out there is, please let me know and I’ll share the information with our readers.