No, if you move to a higher tax bracket, only the income in that bracket gets taxed at the higher rate. Moving to a higher tax bracket can’t hurt you by reducing your post-tax income. For example, for 2022 single filers, the 10% tax bracket applies to all income between $0 and $10,275. Income between $10,276 and $41,775 is taxed at 12%. If your taxable income is $20,000 you only pay 10% tax on your income up to $10,275 and then pay 12% on the amount over $10,275. In this scenario, your total tax bill would be: ($10,275 * 10%) + (($20,000 - $10,275) * 12%) = $2,194