<prompt> Human: I was previously grossing 4425 per pay period and paying 515 in federal taxes single, 2 allowances. New gross is 4800 and federal went up to 825 with the same witholdings. Overall federal increased 60, state about 35 and SSMedicare each by 15.I checked some online calculators and am coming up with the same 825. This would suggest that my old employer wasnt taking out enough but I got a 4k refund so this isnt likely. I could have underpaid and my wife could have overpaid I guess, but she makes about 30k so it doesnt seem like that would have this much of an impact.Am I failing to take something into account here? How the hell is it possible to get a raise and LOSE money?!  <response>: Withholdings are just estimates. If you think theyre withholding too much, reduce them with a revised W-4. 