The IRS has announced higher federal income tax brackets and standard deductions for 2027. Here's what taxpayers need to know. According to the IRS, the 2027 income tax brackets are: 37%: for incomes over $661,375 ($793,650 for married couples filing jointly) 35%: for incomes over. For tax year 2027 (tax returns filed in 2028) the standard deduction increases to $33,200 for married couples filing jointly, and $16,600 for single taxpayers.