if it were to make you lose certain benefits that is another story. but just based on tax itself, the higher tax brackets are only applied to the money that you earn beyond the threshold amount. for example, if you have 2 brackets, 10% up to 40k and 20% beyond that, and you earn 60k, you would end up paying 4k tax on the initial 40k and then another 4k on the 20k beyond that. there's no scenario in which you would end up earning less due to getting into a higher bracket