How is that possible? The next tax level only applies to the money you earn in excess of the lower limit for that level - not all the money you earn. If you were earning say $50,000 and now are earning $75,000, the taxes on the first $50,000 stay the same as they were before, so you'd earning at least as much as you were before. Now, the tax rate on the "extra" money might mean that what is leftover isn't worth it to you, but it shouldn't be possible that earning more/going into the next tax bracket has to taking home less money than before. Possibly some weird withholding, but then that would be sorted when you file your return (or, preferably, by making adjustments before then).